Abstract

The present invention relates to the field of metal materials and provides acid-resistant pipeline steel and a manufacturing method therefor. The chemical components of the acid-resistant pipeline steel comprise, in percentage by weight: 0.02-0.06% of C, 0.10-0.30% of Si, 0.80-1.10% of Mn, 0.02-0.08% of Nb, 0.06-0.12% of V, 0.20-0.30% of Ni, Mo ≤ 0.08%, 0.03-0.06% of Al, 0.0005-0.0030% of Ca, P ≤ 0.008%, S ≤ 0.002%, 0.004-0.006% of [N], [O] ≤ 0.002%, [H] ≤ 0.0015%, B ≤ 0.0008%, and the balance being Fe and inevitable impurities. The acid-resistant pipeline steel is obtained by sequentially carrying out KR pre-desulfurization, BOF top-bottom combined blowing smelting, LF refining, RH refining, continuous casting with stack cooling, heating, steel rolling, rapid water cooling, and heat treatment on blast furnace molten iron. By means of the synergistic effect of composition design and process optimization, the present invention solves the problems of poor low-temperature drop-weight tear test performance and large strength variation across the same plate in acid-resistant pipeline steel.

IPC Classes  ?

• C22C 38/02 - Ferrous alloys, e.g. steel alloys containing silicon
• C21C 7/064 - DephosphorisingDesulfurising
• C21C 7/00 - Treating molten ferrous alloys, e.g. steel, not covered by groups
• C21D 8/02 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
• C22C 38/04 - Ferrous alloys, e.g. steel alloys containing manganese
• C22C 38/06 - Ferrous alloys, e.g. steel alloys containing aluminium
• C22C 38/08 - Ferrous alloys, e.g. steel alloys containing nickel
• C22C 38/12 - Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium or niobium
• C22C 33/04 - Making ferrous alloys by melting
• C21C 1/02 - Dephosphorising or desulfurising
• C21C 5/35 - Blowing from above and through the bath
• C21C 7/10 - Handling in vacuum

Abstract

A preparation method for ultra-high heat input welding steel, and prepared welding steel are provided. A steel plate oxide inclusion beneficial control is used, and low-temperature large-rolling-reduction rolling is also used. The size and distribution of an oxide in a steel plate are regulated and controlled by controlling a rolling process, thereby realizing the preparation of ultra-high heat input welding steel. The method has a low production cost, the production process is easy to control, the operation is simple, the method is suitable for large-scale production, and the mechanical properties and welding heat impact properties of the base material are excellent.

IPC Classes  ?

• C21D 9/00 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor
• C21D 6/00 - Heat treatment of ferrous alloys
• C21D 8/02 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
• C22C 38/00 - Ferrous alloys, e.g. steel alloys
• C22C 38/02 - Ferrous alloys, e.g. steel alloys containing silicon
• C22C 38/48 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with niobium or tantalum
• C22C 38/50 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
• C22C 38/58 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese

Abstract

A converter phosphorus-controlled smelting method for low-temperature steel and a production method for high-quality low-temperature steel. The smelting method comprises the following steps: firstly, adding molten iron and scrap steel to a converter for blowing, wherein the alkalinity of the slag is 2.0-2.5, the total iron thereof is 25-35%, the lance position during the first minute is 1.8-2 m, with oxygen being blown at 28,000-30,000 Nm3/h, then the lance position is controlled to rise and the oxygen blowing is controlled to to reduce twice at the same time, and blocking slag and tapping the steel after the blowing is completed, so as to obtain semi-steel molten steel; adding the semi-steel molten steel, a nickel plate and a second batch of scrap steel to the converter for deep blowing, which is divided into an early stage and a later stage of 3-4 minutes each. During the later stage of blowing, the alkalinity of furnace slag is 5.5-9.5, the temperature of the end point molten steel is 1,580-1,620ºC, P is less than or equal to 0.0035%, and the content of C is 0.02-0.05%.

IPC Classes  ?

• C21C 5/30 - Regulating or controlling the blowing
• C21C 7/064 - DephosphorisingDesulfurising
• C21C 7/072 - Treatment with gases
• C21C 7/076 - Use of slags or fluxes as treating agents

Abstract

High-purity low-temperature steel and a production method therefor. The method comprises KR desulfurization, converter steelmaking, LF-RH refining, continuous casting, hot rolling, and heat treatment; the converter steelmaking period relates to three-stage blowing in a single converter; in the first stage, the lance position is 1.8-2 m in the first minute, the oxygen supply intensity is high, the bottom blowing intensity is high, then the lance position is 2.8-3 m, the oxygen supply intensity is low, the bottom blowing intensity is high, slag having an alkalinity of 1.8-2.5 and a total iron content of 20%-30% is formed, the slag is poured, and the end-point temperature is 1370-1420°C; in the second stage, pellets are added to form slag having an alkalinity of 4.5-8.5 and a total iron content of 18%-26%, the lance position is reduced by 10%-20%, the oxygen supply intensity is high, the bottom blowing intensity is low, the slag is poured, and the end-point temperature is 1550-1580°C; and in the third stage, the lance position is 2.8-3.0 m, the oxygen supply intensity is high, the bottom blowing intensity is high, slag having an alkalinity of 6-12 and a total iron content of 20%-30% is formed, the end-point temperature is 1600-1630°C, and slag cutoff tapping is carried out.

IPC Classes  ?

• C21C 7/064 - DephosphorisingDesulfurising
• C21C 5/35 - Blowing from above and through the bath
• C21C 7/00 - Treating molten ferrous alloys, e.g. steel, not covered by groups
• C21C 7/10 - Handling in vacuum

Abstract

The present invention discloses a welding wire for gas shielded arc welding, and a steel wire rod of a welding wire for gas shielded arc welding and a production method therefor. Chemical components of the steel wire rod of a welding wire for gas shielded arc welding include, in mass percentage, 0.03%-0.08% of C, 0.5%-1.0% of Si, 1.4%-1.8% of Mn, 0.013%-0.1% of S, less than or equal to 0.0015% of P, less than or equal to 0.8% of Ni, less than or equal to 0.4% of Cr, less than or equal to 0.4% of Mo, and the balance of Fe and inevitable impurities; and a liquidus temperature TL=1537-88 [C]-8 [Si]-5 [Mn]-30 [P]-25 [S], a solidus temperature TS=1536-415 [C]-12 [Si]-6.8 [Mn]-125 [P]-184 [S],

IPC Classes  ?

• B23K 35/30 - Selection of soldering or welding materials proper with the principal constituent melting at less than 1550°C
• B23K 35/02 - Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape
• C21D 6/00 - Heat treatment of ferrous alloys
• C21D 8/06 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires
• C21D 9/52 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for wiresHeat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for strips
• C22C 38/00 - Ferrous alloys, e.g. steel alloys
• C22C 38/02 - Ferrous alloys, e.g. steel alloys containing silicon
• C22C 38/44 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
• C22C 38/58 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese

Abstract

A production method for a high-fracture-toughness steel plate. The method comprises: steelmaking, wherein molten steel comprises 0.03-0.07% of C, 0.15-0.25% of Si, 1.43-1.55% of Mn, less than or equal to 0.015% of P, less than or equal to 0.003% of S, 0.05-0.25% of Cr, less than or equal to 0.23% of Ni, 0.13-0.25% of Cu, less than or equal to 0.15% of Mo, 0.02-0.04% of Nb, 0.01-0.02% of Ti and 0.02-0.05% of Alt, and has a reinforcement equivalent Req of 0.43-0.57%; continuous casting, wherein the central segregation grade of a continuously cast product is controlled to be higher than class B, grade 1.0; heating, wherein the temperature of a soaking zone is 1130-1220ºC, and the residence time is 320-570 min; rolling, wherein the final rolling temperature is 725-860ºC; and cooling, wherein the cooling speed is 3-26ºC/s, and the temperature at which a steel plate is taken from water is 210-520ºC.

IPC Classes  ?

• C22C 33/06 - Making ferrous alloys by melting using master alloys
• C22C 38/00 - Ferrous alloys, e.g. steel alloys
• C22C 38/02 - Ferrous alloys, e.g. steel alloys containing silicon
• C22C 38/04 - Ferrous alloys, e.g. steel alloys containing manganese
• C22C 38/06 - Ferrous alloys, e.g. steel alloys containing aluminium
• C22C 38/42 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
• C22C 38/44 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
• C22C 38/48 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with niobium or tantalum
• C22C 38/50 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium

Abstract

Please cancel the abstract of this application and replace it with the following amended abstract presented in clean form according to the procedures outlines in MPEP 714 (II) (B): Please cancel the abstract of this application and replace it with the following amended abstract presented in clean form according to the procedures outlines in MPEP 714 (II) (B): A corrosion-resistant steel bar and a preparation method, in percentage by weight, the corrosion-resistant steel bar comprises 0.03% to 0.15% of C, 0.8% to 2.0% of Si, 0.8% to 2.0% of Mn, 0.10% to 0.50% of Cu, 0.08% to 0.2% of P, 0.005% to 0.01% of S, 0 to 0.1% of Nb, 0 to 0.2% of V, 0 to 0.1% of Ti, 0 to 0.1% of Al, and the balance of Fe and inevitable impurities; wherein, 0.6≤Si/Mn≤2.0, 0.25%≤(Cu+P+S)≤0.62%. Through the design of Si, Mn, Cu, P, S and other alloying elements, considering the strengthening function and corrosion resistance function of each element, the present application solves the problem that the corrosion resistance, mechanical properties and cost of the prior art cannot be achieved together, and overcomes the technical bias in the prior art that Cr, Ni or Mo must be added for improving the corrosion resistance.

IPC Classes  ?

• C22C 38/16 - Ferrous alloys, e.g. steel alloys containing copper
• B22D 11/16 - Controlling or regulating processes or operations
• C22C 33/06 - Making ferrous alloys by melting using master alloys
• C22C 35/00 - Master alloys for iron or steel
• C22C 38/02 - Ferrous alloys, e.g. steel alloys containing silicon
• C22C 38/04 - Ferrous alloys, e.g. steel alloys containing manganese
• C22C 38/06 - Ferrous alloys, e.g. steel alloys containing aluminium
• C22C 38/12 - Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium or niobium
• C22C 38/14 - Ferrous alloys, e.g. steel alloys containing titanium or zirconium

Abstract

Provided in the present application are a corrosion-resistant alloy steel bar and a preparation method therefor, wherein the corrosion-resistant alloy steel bar comprises, in percentage by weight: 0.05-0.25% of C, 1.05-2% of Si, 0.3-1.5% of Mn, 0.5-2.5% of Cr, 0.05-1% of Ni, 0.001-0.005% of O, 0.001-0.0035% of S, 0.005-0.1% of Ti, 0.005-0.1% of Al, 0.005-0.03% of V, and 0.005-0.03% of Nb, with the balance being Fe and inevitable impurities. The preparation method therefor comprises the successive steps of smelting, refining, continuous casting, rolling and cooling. In the present application, elements such as Si, Ti, Al and Mn are used for compensating for the reduction in corrosion resistance caused by a decrease in the content of Cr, such that the production cost of the corrosion-resistant alloy steel bar are greatly reduced.

IPC Classes  ?

• C22C 38/02 - Ferrous alloys, e.g. steel alloys containing silicon
• B22D 11/22 - Controlling or regulating processes or operations for cooling cast stock or mould
• C21D 8/06 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires
• C22C 33/06 - Making ferrous alloys by melting using master alloys
• C22C 38/00 - Ferrous alloys, e.g. steel alloys
• C22C 38/04 - Ferrous alloys, e.g. steel alloys containing manganese
• C22C 38/06 - Ferrous alloys, e.g. steel alloys containing aluminium
• C22C 38/46 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
• C22C 38/48 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with niobium or tantalum
• C22C 38/50 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium

Abstract

A non-oriented silicon steel for a high-speed motor and a manufacturing method therefor. The chemical components of the non-oriented silicon steel for a high-speed motor are as defined in the description, wherein the thickness of a finished product is 0.20-0.30 mm, and the grain size of the finished product is 80-100 μm. The manufacturing method for the non-oriented silicon steel for a high-speed motor comprises: performing smelting and casting into a continuous casting billet, and performing cooling, heating, hot rolling, normalizing, pickling, cold rolling, annealing and coating treatment on the continuous casting billet.

IPC Classes  ?

• C21D 9/00 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor
• C21D 6/00 - Heat treatment of ferrous alloys
• C21D 8/12 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
• C22C 38/00 - Ferrous alloys, e.g. steel alloys
• C22C 38/02 - Ferrous alloys, e.g. steel alloys containing silicon
• C22C 38/04 - Ferrous alloys, e.g. steel alloys containing manganese
• C22C 38/06 - Ferrous alloys, e.g. steel alloys containing aluminium
• C22C 38/42 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
• C22C 38/44 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
• C22C 38/46 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
• C22C 38/48 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with niobium or tantalum
• C22C 38/50 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
• C22C 38/60 - Ferrous alloys, e.g. steel alloys containing lead, selenium, tellurium or antimony, or more than 0.04% by weight of sulfur
• H01F 1/147 - Alloys characterised by their composition

Abstract

Disclosed in the present invention are non-oriented silicon steel and a preparation method therefor. The preparation method comprises: 3.3-3.6% of Si and 0.4-0.8% of Al of a continuous casting slab; heating, hot rolling, and coiling the continuous casting slab, carrying out first-stage cold rolling to prepare a 0.50-0.70 mm primary cold-rolled plate, and maintaining the primary cold-rolled plate at a constant temperature of 820-860°C; then carrying out second-stage cold rolling to prepare a 0.15-0.20 mm secondary cold-rolled plate and then maintaining the secondary cold-rolled plate at a constant temperature of 900-1000°C to obtain a secondary annealed plate; and cooling, coating, and finishing the secondary annealed plate to obtain a finished product. The finished product can be used as a material of an iron core of a stator of a new energy driving motor and solves the technical problems of poor magnetic performance, a high level of alloy elements, a long process route, and a complex process in the prior art.

IPC Classes  ?

• C22C 38/02 - Ferrous alloys, e.g. steel alloys containing silicon
• C22C 38/04 - Ferrous alloys, e.g. steel alloys containing manganese
• C22C 38/06 - Ferrous alloys, e.g. steel alloys containing aluminium
• C21D 8/12 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
• C21D 1/26 - Methods of annealing
• C21D 1/74 - Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material

Abstract

A method for preparing a steel for a high-Ti pipeline submerged-arc welding wire, comprising converter smelting, LF refining, continuous casting, rolling and cooling; in LF refining, refined slag components by weight percentage are: 40 to 50% of (CaO+CaF2), 30 to 40% of Al2O3, 35% of SiO2, and 10 to 20% of MnO, and during the LF refining process, a pure calcium wire is fed before tapping. A steel for a submerged-arc welding wire and a preparation method therefor, a wire rod for a submerged-arc welding wire, a submerged-arc welding wire and a preparation method therefor. The steel for the submerged-arc welding wire and the preparation method for the submerged-arc welding wire overcome the defects of submerged-arc welding wire being high in cost and prone to nodulation; when the steel for the submerged-arc welding wire is prepared, it may continuously cast in more than 10 furnaces.

IPC Classes  ?

• B23K 35/02 - Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape
• B23K 9/18 - Submerged-arc welding
• B23K 35/30 - Selection of soldering or welding materials proper with the principal constituent melting at less than 1550°C
• B23K 35/40 - Making wire or rods for soldering or welding
• C22C 38/00 - Ferrous alloys, e.g. steel alloys
• C22C 38/02 - Ferrous alloys, e.g. steel alloys containing silicon
• C22C 38/04 - Ferrous alloys, e.g. steel alloys containing manganese
• C22C 38/06 - Ferrous alloys, e.g. steel alloys containing aluminium
• C22C 38/14 - Ferrous alloys, e.g. steel alloys containing titanium or zirconium

Abstract

The present application provides an extra-thick Q500qE bridge steel plate and a production method therefor. The production method involves direct rolling of the slab after three-stage heating before rolling and three-stage cooling of the steel plate after rolling. This method can produce a Q500qE steel plate with a maximum thickness of 150 mm, which meets the Z35 level Z-direction tensile performance requirements and the nondestructive testing requirements of Grade II or above according to GB/T 2970-2016 standard. The production process is simple, efficient, and cost-effective.

IPC Classes  ?

• B21B 3/02 - Rolling special iron alloys
• B21B 1/02 - Metal rolling methods or mills for making semi-finished products of solid or profiled cross-sectionSequence of operations in milling trainsLayout of rolling-mill plant, e.g. grouping of standsSuccession of passes or of sectional pass alternations for rolling heavy work, e.g. ingots, slabs, billets, in which the cross-sectional form is unimportant
• B21B 37/16 - Control of thickness, width, diameter or other transverse dimensions
• B21B 37/46 - Roll speed or drive motor control
• B22D 11/00 - Continuous casting of metals, i.e. casting in indefinite lengths
• C21D 8/02 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
• C21D 11/00 - Process control or regulation for heat treatments

Abstract

A chemical composition of a steel plate for high heat input welding includes, in percentages by weight: C<0.1%, Si≤0.15%, S≤0.004%, Mn+Cr+Ni+Cu: 1.5-4.5%, in which the weight ratio of Cr/Ni/Cu is 1:2:1, and Ti+Mg+Zr+Ca: 0.03-0.3%, in which Ti+Mg is 0.03-0.2%, with the balance being Fe and inevitable impurities, where the carbon equivalent Ceq is 0.36-0.42, and Ceq=C+Mn/6+(Cr+Mo+V)/5+(Ni+Cu)/15.

IPC Classes  ?

• C22C 38/58 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese
• B22D 11/00 - Continuous casting of metals, i.e. casting in indefinite lengths
• C21C 7/00 - Treating molten ferrous alloys, e.g. steel, not covered by groups
• C21C 7/10 - Handling in vacuum
• C21D 1/84 - Controlled slow cooling
• C21D 6/00 - Heat treatment of ferrous alloys
• C21D 8/02 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
• C21D 9/46 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for sheet metals
• C22C 33/06 - Making ferrous alloys by melting using master alloys
• C22C 38/00 - Ferrous alloys, e.g. steel alloys
• C22C 38/02 - Ferrous alloys, e.g. steel alloys containing silicon
• C22C 38/04 - Ferrous alloys, e.g. steel alloys containing manganese
• C22C 38/42 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
• C22C 38/50 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium

Abstract

An apparatus for steel slag carbon fixation includes an apparatus body. A spray thrower and a gas outlet arranged at a top of a structure of the apparatus body, a material inlet, a material outlet and a gas inlet are formed on the apparatus body. A transfer unit having a plurality of transfer mechanisms is arranged inside the apparatus body. The apparatus feeds industrial waste gas containing carbon dioxide into steel slag while maintaining environmental humidity in a range from 80% to 100% to implement steel slag carbon fixation. Water content of the steel slag is maintained by controlling the environment humidity. Time of contact between water and the steel slag is reduced, element calcium in the steel slag is prevented from being dissolved out, a water film is not formed on a surface of the steel slag, thereby facilitating deep reaction of carbon dioxide and free calcium oxide.

IPC Classes  ?

• B01D 53/62 - Carbon oxides
• B01D 53/81 - Solid phase processes
• C04B 5/00 - Treatment of molten slagArtificial stone from molten slag

Abstract

Disclosed is a manufacturing method for a tinplate, relating to the technical field of steel plate manufacturing. With regard to the manufacturing method for a tinplate: in the step of flattening a base plate, double stands are used for flattening, a first stand working roller have a surface roughness value Ra of 1.6-1.7 μm and a rolling force of 5000-6000 kN, and a second stand working roller have a surface roughness value Ra of 0.5-0.6 μm and a rolling force of 3000-4000 kN; in the step of electroplating the base plate, an electroplating solution have a Sn2+ concentration of 14-19 g/L; and in the step of passivating the base plate, a passivation solution have a temperature of 41-43° C., a pH value of 4.4-4.6, and a concentration of 16-18 g/L, the passivation electric charge density being 120-180 C/m2.

IPC Classes  ?

• B21B 3/02 - Rolling special iron alloys
• B21B 27/00 - RollsLubricating, cooling or heating rolls while in use
• B21B 37/58 - Roll-force controlRoll-gap control
• C23C 22/24 - Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH < 6 containing hexavalent chromium compounds
• C23C 22/78 - Pretreatment of the material to be coated
• C25D 3/32 - ElectroplatingBaths therefor from solutions of tin characterised by the organic bath constituents used
• C25D 5/36 - Pretreatment of metallic surfaces to be electroplated of iron or steel
• C25D 7/06 - WiresStripsFoils
• C25D 17/02 - TanksInstallations therefor

Abstract

Disclosed in the present invention are non-oriented silicon steel and a preparation method therefor. The steel comprises the following chemical components in percentage by mass: C≤0.0025%, Si: 1.80-2.40%, Al: 0.40-0.60%, Mn: 1.5-2.0%, P≤0.02%, N≤0.003%, Al/N≥200, 0.058≤11×[Si]-14×[Mn]+21×[Al]+24×[P]≤0.078, and the balance being Fe and inclusions. The method comprises: 1) steelmaking, and preparing a continuously cast slab having a thickness of 220-240 mm; and 2) carrying out hot rolling, normalizing, acid pickling, cold rolling, finished product annealing, cooling, coating and finishing on the continuously cast slab to prepare a non-oriented silicon steel finished product, wherein in the finished product annealing process, the annealing temperature is 880-900°C and the temperature is maintained for 60-90 s.

IPC Classes  ?

• C22C 38/06 - Ferrous alloys, e.g. steel alloys containing aluminium
• C21D 8/12 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties

Abstract

Disclosed in the present application are a wire rod for a fatigue-resistant spring steel wire and a production method for the wire rod, and a production method for a fatigue-resistant spring steel wire. The wire rod comprises the following chemical components in percentages by mass: C: 0.2-0.3%, Si: 2.0-3.0%, Mn: 1.8-3.0%, Cr: 2.0-3.0%, V: 0.5-1.0%, P≤0.01%, S≤0.01%, and 7%≤Si+Mn+Cr≤8%, with the balance being Fe and impurities.

IPC Classes  ?

• C22C 38/38 - Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of manganese
• C22C 38/34 - Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of silicon
• C22C 38/24 - Ferrous alloys, e.g. steel alloys containing chromium with vanadium
• C21D 8/06 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires

Abstract

A method for controlling brittle inclusions in cord steel. The method includes the following steps: adding alloys at the moment of tapping in a furnace primary smelting stage and adding silicon carbide and synthetic slag to a top of ladle slag at the end of tapping to form slag; adding the alloys in a refining stage and feeding carbon wires; and adding lime, silicon carbide, the synthetic slag, and performing electrification to slag, where the slag composition meets the following conditions: CaO/SiO2=0.9-1.2, Al2O3≤5%, MgO 4-8%, [MnO+T·Fe]2-5%.

IPC Classes  ?

• C21C 7/06 - Deoxidising, e.g. killing
• B22D 11/00 - Continuous casting of metals, i.e. casting in indefinite lengths
• C21C 7/00 - Treating molten ferrous alloys, e.g. steel, not covered by groups
• C22C 33/04 - Making ferrous alloys by melting
• C22C 38/00 - Ferrous alloys, e.g. steel alloys
• C22C 38/02 - Ferrous alloys, e.g. steel alloys containing silicon
• C22C 38/04 - Ferrous alloys, e.g. steel alloys containing manganese
• C22C 38/06 - Ferrous alloys, e.g. steel alloys containing aluminium
• C22C 38/18 - Ferrous alloys, e.g. steel alloys containing chromium

Abstract

A manufacturing method for a tin plate including a component design of low-carbon aluminum killed steel; under the condition of not increasing the alloy content and the production control difficulty, the content of elements such as C, Mn, Al and N in the tin plate is designed, and corresponding hot rolling, cold rolling, annealing and leveling processes are used; the strengthening effects of conventional elements, carbon and manganese, are fully utilized, aluminum nitride precipitation control in hot rolling is taken into account, a proper cold rolling reduction rate is selected, the ferrite grain size and cementite precipitation in steel are controlled by means of continuous annealing and over-aging treatment, and a specific temper rolling process is used, so that a tin plate having small strength and hardness fluctuations, a high elongation rate and a short yield plateau is produced.

IPC Classes  ?

• C21D 8/02 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
• B22D 11/00 - Continuous casting of metals, i.e. casting in indefinite lengths
• C21C 7/10 - Handling in vacuum
• C21D 1/18 - HardeningQuenching with or without subsequent tempering
• C21D 6/00 - Heat treatment of ferrous alloys
• C21D 9/46 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for sheet metals
• C22C 38/00 - Ferrous alloys, e.g. steel alloys
• C22C 38/02 - Ferrous alloys, e.g. steel alloys containing silicon
• C22C 38/04 - Ferrous alloys, e.g. steel alloys containing manganese
• C22C 38/06 - Ferrous alloys, e.g. steel alloys containing aluminium
• C25D 3/30 - ElectroplatingBaths therefor from solutions of tin
• C25D 5/36 - Pretreatment of metallic surfaces to be electroplated of iron or steel

Abstract

A method for controlling stability of gas flow at the periphery of a blast furnace, including the following steps: constructing a database; and selecting blast furnace operating parameters satisfying a first preset condition from the database to generate an instruction for setting the blast furnace operating parameters for a next operating stage. The first preset condition includes: PD

Abstract

A method for evaluating an on-site desorption effect of activated coke. An on-site desorption effect of activated coke is evaluated in combination with a laboratory simulation desorption process, an activated-coke desorption rate R is calculated by means of measuring the sulfur content of activated-coke samples before and after on-site desorption and the sulfur content of an activated-coke sample after laboratory simulation desorption, and then the on-site desorption effect of activated coke is evaluated, so as to ensure the recycling effect of activated coke. Therefore, the problem of it being impossible to accurately evaluate the on-site desorption effect of activated coke is solved, and an important guidance is provided for on-site process optimization control.

IPC Classes  ?

• G01N 15/08 - Investigating permeability, pore volume, or surface area of porous materials
• G01N 1/28 - Preparing specimens for investigation

Abstract

Disclosed are a wire rod for a fastener and a production method for the wire rod, and a fastener and a production method therefor. The wire rod and the fastener comprise the following chemical components in percentage by mass: C: 0.25-0.45%; Si: 0.15-0.50%; Mn: 0.5-0.8%; P: ≤0.015%; S: ≤0.005%; Cr: 5-12%; Ni: 2.0-4.5%; Cu: ≤0.1%; Ti: 0.05-0.10%; Mo: 0.25-0.50%; Re: 0.01-0.10%; Al: 0.015-0.050%; O: ≤0.001%; N: ≤0.005%; at least one of B, Nb, and V; and the balance being Fe and inevitable impurities, wherein [B]+[Nb]+[V]≤0.15%, [Cr]/[Ni] is 2.0-3.5, and [Mo]/[Ti] is 4-6.

IPC Classes  ?

• C22C 38/18 - Ferrous alloys, e.g. steel alloys containing chromium
• C21D 8/00 - Modifying the physical properties by deformation combined with, or followed by, heat treatment

Abstract

Disclosed in the present invention are a large-thickness steel plate suitable for superhigh-heat-input welding and a production method therefor. The steel plate comprises: C: 0.06-0.11%, Si: 0.15-0.35%, Mn: 1.4-1.8%, Cr: 0.1-0.5%, Ni: 0.3-0.8%, P<0.015%, S<0.015%, Ti: 0.02-0.05%, and Ti+Zr: 0.025-0.15%, with the balance being iron and impurities.

IPC Classes  ?

• C22C 38/50 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
• C21D 8/02 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips

Abstract

Disclosed in the present invention are a corrosion fatigue-resistant spring steel wire, and a wire rod and a production method therefor. The wire rod and the steel wire each comprise the following chemical components in percentage by mass: C: 0.2-0.7%, Si: 0.8-1.6%, Mn: 0.5-1.7%, Al: 0.35-0.85%, Nb: 0.1-0.5%, Cr: 0.5-1.0%, Mo: 0.1-0.4%, P: 0.02% or less, S: 0.02% or less, and the balance of Fe and inevitable impurities.

IPC Classes  ?

• C22C 38/26 - Ferrous alloys, e.g. steel alloys containing chromium with niobium or tantalum
• C22C 38/22 - Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
• C22C 38/06 - Ferrous alloys, e.g. steel alloys containing aluminium
• C22C 38/04 - Ferrous alloys, e.g. steel alloys containing manganese
• C22C 38/02 - Ferrous alloys, e.g. steel alloys containing silicon
• C21D 8/06 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires
• C22C 38/38 - Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of manganese
• C22C 38/34 - Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of silicon

Abstract

The present invention relates to the technical field of alloys. Provided are a steel plate and a production method therefor. The steel plate adopts a corrosion-resistant alloying component system with compound addition of Ce+Sn+Cu. The addition of Ce can improve the corrosion resistance of the steel plate, and Ce is easy to combine with oxygen to generate a spherical oxide; and the steel plate has the capacity of inducing acicular ferrite nucleation in crystals, thereby improving the welding performance of the steel plate. On the basis of the comprehensive design of chemical components, by means of accurate control over process parameters of a rolling and cooling process, a super-large-heat-input steel plate, which is resistant to marine atmospheric corrosion and has good comprehensive performance, is obtained.

IPC Classes  ?

• C22C 38/16 - Ferrous alloys, e.g. steel alloys containing copper
• B23P 15/00 - Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
• C22C 38/02 - Ferrous alloys, e.g. steel alloys containing silicon
• C22C 38/04 - Ferrous alloys, e.g. steel alloys containing manganese
• C21D 8/02 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
• C22C 33/06 - Making ferrous alloys by melting using master alloys
• C21C 7/00 - Treating molten ferrous alloys, e.g. steel, not covered by groups
• C21C 7/10 - Handling in vacuum
• B21B 3/00 - Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences
• B21B 45/02 - Devices for surface treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning

Abstract

222S, the temperature is maintained at 950-1000℃, and the temperature is maintained for15-30 min; and a single-layer non-oriented silicon steel finished product having a thickness of 0.15-0.30 mm is manufactured without normalizing.

IPC Classes  ?

• B21B 1/26 - Metal rolling methods or mills for making semi-finished products of solid or profiled cross-sectionSequence of operations in milling trainsLayout of rolling-mill plant, e.g. grouping of standsSuccession of passes or of sectional pass alternations for rolling bands or sheets of indefinite length in a continuous process by hot-rolling
• B21B 1/38 - Metal rolling methods or mills for making semi-finished products of solid or profiled cross-sectionSequence of operations in milling trainsLayout of rolling-mill plant, e.g. grouping of standsSuccession of passes or of sectional pass alternations for rolling sheets of limited length, e.g. folded sheets, superimposed sheets

Abstract

The present application relates to the field of resource utilization of industrial waste, and specifically relates to a device and method for carbon sequestration of steel slag. The device for carbon sequestration of steel slag comprises a device body, and a sprayer and a vent, which are arranged at the top of the structure of the device body, wherein the device body is further provided with a feeding port, a discharging port and an air intake port, a conveying unit is arranged in the device body, and the conveying unit comprises a plurality of conveying mechanisms. The device can introduce industrial waste gas containing carbon dioxide into steel slag under the condition that the ambient humidity is maintained at 80-100%, thereby achieving carbon sequestration of the steel slag. In the present application, by controlling the ambient humidity, maintaining the moisture content of the steel slag during the process of a reaction of same with carbon dioxide and reducing the contact time of water and the steel slag at the same time, calcium in the steel slag is prevented from being dissolved out, and a water film is not formed on the surface of the steel slag to affect the reaction of carbon dioxide with free calcium oxide in the steel slag, thereby enabling a further reaction between carbon dioxide and free calcium oxide.

IPC Classes  ?

• C04B 5/06 - Ingredients, other than water, added to the molten slagTreatment with gases or gas generating material, e.g. to obtain porous slag
• C04B 28/08 - Slag cements
• B01D 53/81 - Solid phase processes

Abstract

A non-oriented silicon steel for driving motors of new energy vehicles and a production method thereof. The silicon steel is produced sequentially by steel smelting, continuous casting, hot rolling, normalizing, acid washing, single stand cold rolling without pre-heating, annealing, cooling, coating, and finishing. During steel smelting, no Cu, Cr, Ni, Nb, V, and Ti are added. The silicon steel comprises the following chemical ingredients: Si: 2.95%-3.15%, Al: 0.75%-0.95%, Si+2Al: 4.6%-4.9%, Mn: 0.5%-0.7%, Sn: 0.03%-0.04%, C≤0.0025%, with the balance being iron, wherein Mn/S≥380, and Al/N≥200. In the present application, the strength is improved while the magnetic performance is ensured, to solve the problem in the prior art that the magnetic performance and strength cannot be pursued at the same time, thus meeting the requirements for use in driving motors of new energy vehicles.

IPC Classes  ?

• C22C 38/02 - Ferrous alloys, e.g. steel alloys containing silicon
• C21D 1/26 - Methods of annealing
• C21D 6/00 - Heat treatment of ferrous alloys
• C21D 8/10 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of tubular bodies
• C21D 8/12 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
• C21D 9/46 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for sheet metals
• C22C 33/04 - Making ferrous alloys by melting
• C22C 38/00 - Ferrous alloys, e.g. steel alloys
• C22C 38/04 - Ferrous alloys, e.g. steel alloys containing manganese
• C22C 38/06 - Ferrous alloys, e.g. steel alloys containing aluminium

Abstract

Disclosed in the present invention are a stainless steel clad plate for a bridge structure, and a preparation method for the stainless steel clad plate. In the method, billet assembling is performed by means of using a carbon steel substrate A on an upper layer, a carbon steel substrate B on a lower layer, and at least two stainless steel composite materials on an intermediate layer, and four seals surrounding four side edges of the intermediate layer, wherein the seals are provided with circular through holes, steel tubes are welded in the through holes, and holes are reserved around the steel tubes during surfacing; after vacuumizing, the steel tubes are bent into the reserved holes; full welding is then carried out to seal-weld the steel tubes in the holes; during whole rolling, transverse rolling is used for the first N passes, and longitudinal rolling is subsequently used; and after the nth pass and the (n+2)th pass, a billet is subjected to one instance of back-and-forth water cooling in six sets of headers.

IPC Classes  ?

• B32B 37/06 - Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the heating method
• B32B 37/10 - Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using direct action of vacuum or fluid pressure
• B32B 37/08 - Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the cooling method
• B32B 37/14 - Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers
• B32B 38/18 - Handling of layers or the laminate

Abstract

Disclosed in the present invention are a stainless steel composite panel having excellent interface bonding and a preparation method therefor. In a rolling process of the method, longitudinal rolling is performed after n passes of transverse rolling, a reduction rate of a first pass is greater than or equal to 25 mm, the temperature is greater than or equal to 1060°C in the first pass, a target width is achieved in an nth pass, and the temperature is greater than or equal to 1030°C in the nth pass; after the nth pass and an (n+2)-th pass, reciprocating water cooling is performed once in six sets of headers, the cooling water amount of upper headers and the cooling water amount of lower headers are respectively 120-180 m3/h and 160-220 m3/h, and the roller way speed is 0.8-1.2 m/s; the reduction rate of the (n+1)-th to (n+3)-th passes is greater than or equal to 40 mm, and the temperature is greater than or equal to 950°C in the (n+1)-th pass; when reaching an mth pass, the temperature is greater than or equal to 900°C, and a blank thickness is 2.5-3.5 times of a target thickness of a large composite panel; then watering and cooling are performed until the surface temperature of a blank is reduced to 840°C or below; and then second-stage rolling is performed, the temperature of the first pass of the second-stage rolling is 810-840°C, and the temperature of the last pass of the second-stage rolling is 780-810°C.

IPC Classes  ?

• B21B 1/38 - Metal rolling methods or mills for making semi-finished products of solid or profiled cross-sectionSequence of operations in milling trainsLayout of rolling-mill plant, e.g. grouping of standsSuccession of passes or of sectional pass alternations for rolling sheets of limited length, e.g. folded sheets, superimposed sheets
• B21B 47/00 - Auxiliary arrangements, devices or methods in connection with rolling of multi-layer sheets of metal
• B21B 45/00 - Devices for surface treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
• B21B 37/74 - Temperature control, e.g. by cooling or heating the rolls or the product
• B21B 45/02 - Devices for surface treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning

Abstract

A stainless steel composite plate with an excellent appearance, and a preparation method therefor. The method comprises three main steps, i.e., composite blank preparation, composite blank rolling, and composite plate separation and straightening, wherein in the step of composite blank preparation, three instances of vacuumizing and two instances of vacuum breaking are performed on a composite blank by means of a seamless steel pipe, and finally the vacuum degree is less than or equal to 10^-2 Pa; in the step of composite blank rolling, intermittent cooling and straightening are performed, and stacking cooling is performed using two steel plates which are at T^f-150°C to T^f+150°C; and in the step of composite plate separation and straightening, flattening is performed using a flattening machine, a transverse flattening force F1 being equal to ν×a×b×c^transverse×σ^transverse/(d×(ν-c^transverse/a)), and a longitudinal flattening force F2 being equal to a×b×c^longitudinal×σ^longitudinal/(d+c^longitudinal). The composite plate has an excellent appearance and an excellent interfacial bonding quality, the degree of unevenness is less than or equal to 3 mm/m, the composite interfacial bonding rate is 100%, the shear strength is greater than or equal to 300 MPa, and the yield and production efficiency are high.

IPC Classes  ?

• B21B 1/38 - Metal rolling methods or mills for making semi-finished products of solid or profiled cross-sectionSequence of operations in milling trainsLayout of rolling-mill plant, e.g. grouping of standsSuccession of passes or of sectional pass alternations for rolling sheets of limited length, e.g. folded sheets, superimposed sheets
• B21B 1/00 - Metal rolling methods or mills for making semi-finished products of solid or profiled cross-sectionSequence of operations in milling trainsLayout of rolling-mill plant, e.g. grouping of standsSuccession of passes or of sectional pass alternations
• B21B 47/02 - Auxiliary arrangements, devices or methods in connection with rolling of multi-layer sheets of metal for folding sheets before rolling
• B21B 47/00 - Auxiliary arrangements, devices or methods in connection with rolling of multi-layer sheets of metal
• B32B 15/18 - Layered products essentially comprising metal comprising iron or steel
• B32B 15/01 - Layered products essentially comprising metal all layers being exclusively metallic
• B32B 15/00 - Layered products essentially comprising metal
• B21C 37/02 - Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided forManufacture of tubes of special shape of sheets
• B21C 37/00 - Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided forManufacture of tubes of special shape

Abstract

A preparation method for ultra-large linear energy welding steel, and prepared welding steel. A steel plate oxide inclusion beneficial control is used, and low-temperature large-rolling-reduction rolling is also used. The size and distribution of an oxide in a steel plate are regulated and controlled by controlling a rolling process, thereby realizing the preparation of ultra-large linear energy welding steel. The method has a low production cost, the production process is easy to control, the operation is simple, the method is suitable for large-scale production, and the mechanical properties and welding heat impact properties of the base material are excellent.

IPC Classes  ?

• C21D 8/02 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
• C21D 11/00 - Process control or regulation for heat treatments
• C22C 38/02 - Ferrous alloys, e.g. steel alloys containing silicon
• C22C 38/04 - Ferrous alloys, e.g. steel alloys containing manganese
• C22C 38/58 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese
• C22C 38/50 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
• C22C 33/06 - Making ferrous alloys by melting using master alloys
• B21B 37/58 - Roll-force controlRoll-gap control
• B21B 37/74 - Temperature control, e.g. by cooling or heating the rolls or the product
• B21B 37/76 - Cooling control on the run-out table
• B21B 1/26 - Metal rolling methods or mills for making semi-finished products of solid or profiled cross-sectionSequence of operations in milling trainsLayout of rolling-mill plant, e.g. grouping of standsSuccession of passes or of sectional pass alternations for rolling bands or sheets of indefinite length in a continuous process by hot-rolling
• B21B 1/46 - Metal rolling methods or mills for making semi-finished products of solid or profiled cross-sectionSequence of operations in milling trainsLayout of rolling-mill plant, e.g. grouping of standsSuccession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting
• B23K 103/04 - Steel alloys

Abstract

The present invention belongs to the technical field of steel smelting, and provides a corrosion-resistant steel bar and a production method therefor. The corrosion-resistant steel bar comprises in percentage by weight: 0.03-0.15% of C, 0.8-2.0% of Si, 0.8-2.0% of Mn, 0.10-0.50% of Cu, 0.08-0.2% of P, 0.005-0.01% of S, ≤ 0.1% of Nb, ≤ 0.2% of V, ≤ 0.1% of Ti, ≤ 0.1% of Al, the balance of Fe, and inevitable impurities; 0.6 ≤ Si/Mn ≤ 2.0, 0.25 ≤ Cu+P+S ≤ 0.62. By means of the associated design of alloy elements such as Si, Mn, Cu, P, and S, the strengthening effect and the corrosion resistance effect of each element are considered, so that the problem that the corrosion resistance, mechanical properties, and cost cannot be achieved at the same time in the prior art is solved, and the technical bias that Cr, Ni, or Mo must be added to improve the corrosion resistance in the prior art is overcome.

IPC Classes  ?

• C22C 38/00 - Ferrous alloys, e.g. steel alloys
• C22C 38/02 - Ferrous alloys, e.g. steel alloys containing silicon
• C22C 38/06 - Ferrous alloys, e.g. steel alloys containing aluminium

Abstract

The present application discloses a non-oriented silicon steel and a method for producing the same. The production method includes: carrying out steelmaking in accordance with 0.8-1.1% of Si and 0.2-0.4% of Mn, without the addition of Sn and Sb, and making a cast billet; heating the cast billet to 1060-1120° C., then rolling and finish rolling and coiling the cast billet into a hot rolled coil with a thickness of 3.00±0.25 mm, where the start-rolling temperature for finish rolling is ≤872° C.+1000*(11*[Si]−14*[Mn]+21*[Al]), the end-rolling temperature for finish rolling is ≤820° C., and the coiling temperature is ≤560° C.; normalizing and acid tandem rolling, where the normalizing temperature is 850-900° C.; and annealing at the temperature for final annealing of 820-880° C., cooling, coating and finishing are carried out to obtain the non-oriented silicon steel.

IPC Classes  ?

• C22C 38/02 - Ferrous alloys, e.g. steel alloys containing silicon
• C21D 1/28 - Normalising
• C21D 6/00 - Heat treatment of ferrous alloys
• C21D 8/12 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
• C22C 38/04 - Ferrous alloys, e.g. steel alloys containing manganese

Abstract

A manufacturing method for a tinplate, relating to the technical field of steel plate manufacturing. With regard to the manufacturing method for a tinplate: in the step of flattening a base plate, double stands are used for flattening, a first stand working roller have a surface roughness value Ra of 1.6-1.7μm and a rolling force of 5000-6000kN, and a second stand working roller have a surface roughness value Ra of 0.5-0.6μm and a rolling force of 3000-4000kN; in the step of electroplating the base plate, an electroplating solution have a Sn 2+concentration of 14-19mL/L; and in the step of passivating the base plate, a passivation solution have a temperature of 41-43℃, a pH value of 4.4-4.6, and a concentration of 16-18g/L, the passivation electric charge density being 120-180C/m 2. In the manufacturing method, by means of the synergistic effect of various process parameters, the corrosion resistance and the adhesive force of the tinplate may meet the use requirements at the same time.

IPC Classes  ?

• C25D 3/30 - ElectroplatingBaths therefor from solutions of tin
• C25D 5/36 - Pretreatment of metallic surfaces to be electroplated of iron or steel
• C25D 5/48 - After-treatment of electroplated surfaces
• C25D 11/34 - Anodisation of metals or alloys not provided for in groups
• C25D 7/00 - Electroplating characterised by the article coated

Abstract

A low-temperature steel for marine engineering, and a production method therefor. The steel comprises the following chemical components: 0.07-0.13% of carbon, 0.1-0.4% of silicon, 0.6-1.5% of manganese, 5-9% of nickel, 0.6-0.8% of chromium, 0.6-0.9% of molybdenum, 0.1-0.16% of vanadium, 0.4-0.8% of copper, with the balance being iron and impurities. A process route of smelting → refining → continuous casting → heating → rolling → cooling → three-stage heat treatment is used. In the first-stage heat treatment, the temperature is 800-850ºC, the heat preservation time coefficient is 1-1.5 min/mm, and water cooling is performed; in the second-stage heat treatment, the temperature is 700-720ºC, the heat preservation time coefficient is 1-1.5 min/mm, and water cooling is performed; and in the third-stage heat treatment, the temperature is 600-620ºC, the heat preservation time coefficient is 2-2.5 min/mm, and air cooling is performed. The steel has good comprehensive performance in an environment at -80ºC or lower and satisfies the requirements of the marine engineering field.

IPC Classes  ?

• C22C 38/02 - Ferrous alloys, e.g. steel alloys containing silicon
• C22C 38/04 - Ferrous alloys, e.g. steel alloys containing manganese
• C22C 38/42 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
• C22C 38/44 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
• C22C 38/46 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
• C21D 8/02 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips

Abstract

A method for evaluating an on-site desorption effect of activated coke. An on-site desorption effect of activated coke is evaluated in combination with a laboratory simulation desorption process, an activated-coke desorption rate R is calculated by means of measuring the sulfur content of activated-coke samples before and after on-site desorption and the sulfur content of an activated-coke sample after laboratory simulation desorption, and then the on-site desorption effect of activated coke is evaluated, so as to ensure the recycling effect of activated coke. Therefore, the problem of it being impossible to accurately evaluate the on-site desorption effect of activated coke is solved, and an important guidance is provided for on-site process optimization control.

IPC Classes  ?

• G01N 33/00 - Investigating or analysing materials by specific methods not covered by groups
• G01N 15/08 - Investigating permeability, pore volume, or surface area of porous materials
• G01N 1/28 - Preparing specimens for investigation

Abstract

A non-oriented silicon steel plate and a production method therefor. The content of Si and the content of Al in non-oriented silicon steel are finely regulated and controlled on the basis of the value of (Si/Al)/(Si+Al), and a production process is accurately controlled, so that texture optimization of a silicon steel substrate is promoted, iron loss after secondary annealing is reduced, and theus the loss of a motor product is remarkably reduced. Moreover, the total amount of Si and Al added in the non-oriented silicon steel plate is low, so that the alloy cost is low, and the production process is simple. Therefore, the comprehensive cost of the non-oriented silicon steel plate is relatively low, and the product has better market competitiveness.

IPC Classes  ?

• C22C 38/02 - Ferrous alloys, e.g. steel alloys containing silicon
• C22C 38/04 - Ferrous alloys, e.g. steel alloys containing manganese
• C22C 38/06 - Ferrous alloys, e.g. steel alloys containing aluminium
• C21D 8/12 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
• C21D 1/26 - Methods of annealing

Abstract

The present application relates to the technical field of alloy materials, and in particular, to a tin plate and a manufacturing method therefor. According to the provided manufacturing method for the tin plate, a component design of low-carbon aluminum killed steel is employed; under the condition of not increasing the alloy content and the production control difficulty, the content of elements such as C, Mn, Al and N in the tin plate is designed, and corresponding hot rolling, cold rolling, annealing and leveling processes are used; the strengthening effects of conventional elements, carbon and manganese, are fully utilized, aluminum nitride precipitation control in hot rolling is taken into account, a proper cold rolling reduction rate is selected, the ferrite grain size and cementite precipitation in steel are controlled by means of continuous annealing and over-aging treatment, and a specific leveling process is used, so that a tin plate having small strength and hardness fluctuations, a high elongation rate and a short yield plateau is produced. In addition, the amount of alloy tin is reasonably controlled to meet the requirements for stamping formability, pressure resistance and surface glossiness of an aerosol can top cover, so that the tin plate has simple components, the process is simple and easy to implement, and the production cost is low.

IPC Classes  ?

• C22C 38/04 - Ferrous alloys, e.g. steel alloys containing manganese
• C22C 38/02 - Ferrous alloys, e.g. steel alloys containing silicon
• C22C 38/06 - Ferrous alloys, e.g. steel alloys containing aluminium
• C21D 8/02 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
• C21D 1/26 - Methods of annealing
• C25D 5/50 - After-treatment of electroplated surfaces by heat-treatment
• C25D 7/06 - WiresStripsFoils
• B21C 37/02 - Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided forManufacture of tubes of special shape of sheets
• B21B 1/22 - Metal rolling methods or mills for making semi-finished products of solid or profiled cross-sectionSequence of operations in milling trainsLayout of rolling-mill plant, e.g. grouping of standsSuccession of passes or of sectional pass alternations for rolling bands or sheets of indefinite length

Abstract

22322, and 10-20% MnO, and during the LF refining process, a pure calcium wire is fed before tapping. A steel for a submerged-arc welding wire and a preparation method therefor, a wire rod for a submerged-arc welding wire, a submerged-arc welding wire and a preparation method therefor. The steel for the submerged-arc welding wire and the preparation method for the submerged-arc welding wire overcome the defects of submerged-arc welding wire being high in cost and prone to nodulation; when the steel for the submerged-arc welding wire is prepared, it may continuously cast in more than 10 furnaces.

IPC Classes  ?

• B23K 35/40 - Making wire or rods for soldering or welding
• B23K 9/18 - Submerged-arc welding

Abstract

A corrosion-resistant 460 MPa-grade steel plate and a production method therefor. The steel plate uses a corrosion-resistant alloying component system and has Cr, Ni, Mo, Cu, P added therein, so that the usage of precious alloy is reduced while the corrosion resistance and the welding performance are ensured. While impurity elements are strictly controlled, one or more rare earth elements from La, Ce, Pr, and Nd are used to purify molten steel, such that the corrosion resistance is further improved. The comprehensive design of chemical components and accurate control over technological parameters in rolling and cooling processes achieve accurate control over the structure, inclusion content, and size of the steel plate. In this way, the marine atmospheric corrosion-resistant 460 MPa-grade steel plate for use in wind power tower cylinders and having good comprehensive performance is obtained.

IPC Classes  ?

• C22C 33/04 - Making ferrous alloys by melting
• C22C 38/02 - Ferrous alloys, e.g. steel alloys containing silicon
• C22C 38/04 - Ferrous alloys, e.g. steel alloys containing manganese
• C22C 38/06 - Ferrous alloys, e.g. steel alloys containing aluminium
• C22C 38/42 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
• C22C 38/44 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
• C22C 38/48 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with niobium or tantalum
• C21D 8/02 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips

Abstract

A resource recovery method and a resource recovery system of desulfurized ash. The resource recovery method includes washing desulfurized ash with water, and performing solid-liquid separation to obtain solid residues rich in calcium sulfite and calcium sulfate and a solution rich in calcium hydroxide; preparing the solution into desulfurization slurry; and roasting the solid residues under the action of a reducing agent to obtain flue gas rich in sulfur dioxide and residues rich in calcium oxide. Therefore, the recovery of sulfur and calcium in the desulfurized ash is realized, and no solid waste, liquid waste, gas waste, etc. are produced in the process.

IPC Classes  ?

• B09B 3/40 - Destroying solid waste or transforming solid waste into something useful or harmless involving thermal treatment, e.g. evaporation
• B01D 53/50 - Sulfur oxides
• B01D 53/80 - Semi-solid phase processes, i.e. by using slurries
• B01D 53/96 - Regeneration, reactivation or recycling of reactants
• B09B 3/70 - Chemical treatment, e.g. pH adjustment or oxidation
• B09B 101/30 - Incineration ashes
• C01B 17/50 - Preparation of sulfur dioxide
• C01F 11/08 - Oxides or hydroxides by reduction of sulfates
• C22B 1/16 - SinteringAgglomerating

Abstract

1.0/10001.0/1000 by means of resistivity control, inclusion control, texture control, grain size control and the like, the smelting cost is low, the production process is simple, the production cost is low, and the application requirements of a high speed, a small size and high efficiency of a high-speed motor are satisfied.

IPC Classes  ?

• C22C 38/02 - Ferrous alloys, e.g. steel alloys containing silicon
• C22C 38/04 - Ferrous alloys, e.g. steel alloys containing manganese
• C22C 38/06 - Ferrous alloys, e.g. steel alloys containing aluminium
• C22C 38/42 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
• C22C 38/46 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
• C22C 38/48 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with niobium or tantalum
• C22C 38/50 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
• C22C 38/60 - Ferrous alloys, e.g. steel alloys containing lead, selenium, tellurium or antimony, or more than 0.04% by weight of sulfur
• C21D 8/12 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
• C22C 33/04 - Making ferrous alloys by melting

Abstract

The present invention discloses a 400 MPa corrosion-resistant steel bar and a production method thereof. The steel bar includes the following chemical ingredients: 9.5-10.4% of Cr, 1.0-1.2% of Mo, 0.3-0.6% of Mn, 0.01-1% of Ni, 0.01-0.5% of Cu, at most 0.014% of C, at most 0.004% of N, 0.01-0.05% of Nb, 0.2-0.6% of Si, and the balance of Fe, where Cr+Mo+0.5Mn+0.35Ni+0.25Cu is 11.1-12.2%, and C+N+0.3Si+Mn+1.8Nb is 0.4-0.8%.

IPC Classes  ?

• C21D 9/08 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for tubular bodies or pipes
• C21C 7/00 - Treating molten ferrous alloys, e.g. steel, not covered by groups
• C21C 7/064 - DephosphorisingDesulfurising
• C21D 1/84 - Controlled slow cooling
• C21D 6/00 - Heat treatment of ferrous alloys
• C21D 8/10 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of tubular bodies
• C22C 33/06 - Making ferrous alloys by melting using master alloys
• C22C 38/00 - Ferrous alloys, e.g. steel alloys
• C22C 38/04 - Ferrous alloys, e.g. steel alloys containing manganese
• C22C 38/06 - Ferrous alloys, e.g. steel alloys containing aluminium
• C22C 38/42 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
• C22C 38/44 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
• C22C 38/46 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
• C22C 38/48 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with niobium or tantalum
• C22C 38/50 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
• C22C 38/54 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with boron

Abstract

A high-carbon steel wire rod and a production method therefor. The production method comprises: performing smelting to obtain molten steel; performing continuous casting on the molten steel to obtain a continuous casting billet, and performing reduction treatment on the continuous casting billet by using reduction rates, which are high, low and high in sequence, during a continuous casting process; performing breakdown rolling on the continuous casting billet after heating the continuous casting billet, so as to obtain a breakdown material; and performing rolling and air cooling treatment on the breakdown material after heating the breakdown material, so as to obtain a wire rod.

IPC Classes  ?

• B22D 11/00 - Continuous casting of metals, i.e. casting in indefinite lengths
• B22D 11/12 - Accessories for subsequent treating or working cast stock in situ
• B22D 11/124 - Accessories for subsequent treating or working cast stock in situ for cooling

Abstract

An extra-thick Q500qE bridge steel plate and a production method therefor. In the production method, a rolling treatment is directly performed on a slab after heating performed before three-stage rolling, and a three-stage cooling treatment is performed on a steel plate after rolling, such that a Q500qE steel plate with the maximum thickness of 150 mm can be obtained, and the steel plate can satisfy Z-direction tensile property requirements for Z35 grade and flaw detection requirements for grade II or above in the GB/T 2970-2016 standard. By means of such arrangement, the production process is simple, and has high efficiency and low production costs.

IPC Classes  ?

• C22C 38/02 - Ferrous alloys, e.g. steel alloys containing silicon

Abstract

A non-oriented silicon steel and a production method are provided. The non-oriented silicon steel is prepared by using the processes of molten iron desulfurization, converter smelting, RH refining, continuous casting, hot rolling, acid tandem rolling, annealing, coating and finishing, and a chemical composition is as follows in mass percent: C≤0.003%, S≤0.008%, Si: 0.35%+Δ1, Mn: 0.15-0.25%, P: 0.04-0.06%, Sn: 0.015%+Δ2, Nb≤0.004%, V≤0.004%, Ti≤0.005%, Mo≤0.004%, Cr≤0.03%, Ni≤0.03%, Cu≤0.03%, N≤0.003% and the balance of Fe and inevitable inclusions. The non-oriented silicon steel has the iron loss P1.5/50≤5.5 W/kg and the magnetic induction intensity B5000≥1.75 when having the thickness of 0.5 mm, and desulfurization is not needed in the RH refining process.

IPC Classes  ?

• C21D 9/52 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for wiresHeat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for strips
• C21C 1/02 - Dephosphorising or desulfurising
• C21C 5/28 - Manufacture of steel in the converter
• C21C 7/00 - Treating molten ferrous alloys, e.g. steel, not covered by groups
• C21C 7/10 - Handling in vacuum
• C22C 33/04 - Making ferrous alloys by melting
• C22C 38/50 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
• C22C 38/48 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with niobium or tantalum
• C22C 38/46 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
• C22C 38/44 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
• C22C 38/42 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
• C22C 38/04 - Ferrous alloys, e.g. steel alloys containing manganese
• C22C 38/02 - Ferrous alloys, e.g. steel alloys containing silicon
• C22C 38/00 - Ferrous alloys, e.g. steel alloys
• C21D 8/02 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
• C21D 6/00 - Heat treatment of ferrous alloys
• C21D 1/84 - Controlled slow cooling
• C21D 1/74 - Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
• C23G 1/08 - Iron or steel

Abstract

A wire rod for a 5000 MPa-grade diamond wire and a production method are provided. The wire rod includes the following chemical components: 1.01% to 1.1% of carbon, 0.15% to 0.4% of silicon, 0.3% to 0.6% of manganese, 0.01% to 0.4% of chromium, 0.0005% to 0.002% of boron and/or 0.01% to 0.09% of vanadium; and the balance of iron and impurities. The production method includes vacuum melting, electroslag remelting and/or vacuum consumable melting, grinding after cogging/forging, high-speed wire rolling and cooling, and cogging at 1030° C. to 1060° C. The wire rod, with structural uniformity and tensile strength of more than or equal to 1320 MPa, can be configured to prepare 5000 MPa-grade steel wires with a diameter of 40 μm to 46 μm.

IPC Classes  ?

• C21D 9/52 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for wiresHeat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for strips
• C22C 33/04 - Making ferrous alloys by melting
• C22C 38/32 - Ferrous alloys, e.g. steel alloys containing chromium with boron
• C22C 38/28 - Ferrous alloys, e.g. steel alloys containing chromium with titanium or zirconium
• C22C 38/24 - Ferrous alloys, e.g. steel alloys containing chromium with vanadium
• C22C 38/06 - Ferrous alloys, e.g. steel alloys containing aluminium
• C22C 38/04 - Ferrous alloys, e.g. steel alloys containing manganese
• C22C 38/02 - Ferrous alloys, e.g. steel alloys containing silicon
• C22C 38/00 - Ferrous alloys, e.g. steel alloys
• C22C 38/20 - Ferrous alloys, e.g. steel alloys containing chromium with copper
• C21B 13/12 - Making spongy iron or liquid steel, by direct processes in electric furnaces
• C21D 7/13 - Modifying the physical properties of iron or steel by deformation by hot working

Abstract

The present invention relates to a normalizing heat treatment production process, comprising the steps of: feeding a slab of a steel plate into a heating furnace for heating, wherein the final temperature before the slab is discharged out of the furnace is controlled to be 1180-1200°C, and the time of the slab in the furnace is greater than or equal to 1.0 min/mm; rolling the slab into a preset finished steel plate size by means of a rolling mill, wherein the final rolling temperature is 940°C or above, the cooling temperature of the steel plate is 710-750°C, and the cooling rate is controlled to be 10±5°C/s; stacking and slowly cooling the steel plate offline to 80°C or below; feeding the steel plate into a heat treatment furnace, wherein the temperature of each area of the heat treatment furnace is set to be 940-950°C, the time of the steel plate in the heat treatment furnace is 1.2-1.4 min/mm, the temperature of the tail of the steel plate is not lower than 880°C when the steel plate is discharged out of the heat treatment furnace; and cooling the steel plate. According to the present invention, the time of the steel plate in the heat treatment furnace can be shortened, thereby achieving the purpose of improving the normalizing production efficiency.

IPC Classes  ?

• C21D 1/28 - Normalising
• C21D 8/02 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips

Abstract

Provided in the present application are a corrosion-resistant alloy steel bar and a preparation method therefor, wherein the corrosion-resistant alloy steel bar comprises, in percentage by weight: 0.05-0.25% of C, 1.05-2% of Si, 0.3-1.5% of Mn, 0.5-2.5% of Cr, 0.05-1% of Ni, 0.001-0.005% of O, 0.001-0.0035% of S, 0.005-0.1% of Ti, 0.005-0.1% of Al, 0.005-0.03% of V, and 0.005-0.03% of Nb, with the balance being Fe and inevitable impurities. The preparation method therefor comprises the successive steps of smelting, refining, continuous casting, rolling and cooling. In the present application, elements such as Si, Ti, Al and Mn are used for compensating for the reduction in corrosion resistance caused by a decrease in the content of Cr, such that the production cost of the corrosion-resistant alloy steel bar are greatly reduced.

IPC Classes  ?

• C22C 38/02 - Ferrous alloys, e.g. steel alloys containing silicon
• C22C 38/04 - Ferrous alloys, e.g. steel alloys containing manganese
• C22C 38/06 - Ferrous alloys, e.g. steel alloys containing aluminium
• C22C 38/46 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
• C22C 38/48 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with niobium or tantalum
• C22C 38/50 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
• C21D 8/08 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires for concrete reinforcement
• C22C 33/06 - Making ferrous alloys by melting using master alloys

Abstract

A high-grade non-oriented silicon steel and a production method are provided. The non-oriented silicon steel includes the following chemical components in percent by mass: 0.002-0.004% of C, not greater than 0.003% of S, 1.4-1.7% of Si, 0.7-0.95% of Mn, not greater than 0.03% of P, 0.015-0.035% of Sn; and 11×([Si]-1.4%)=14×([Mn]-0.7%). In the production method, the heating temperature of a continuous casting billet is 1,120-1,150° C.; the finishing temperature in finish rolling is 890±15° C.; the rolling reduction of the last pass of finish rolling is not less than 30%, the total rolling reduction of the last two passes of finish rolling is not less than 50%, and the coiling temperature is 650±20° C.; normalizing treatment is avoided before acid continuous rolling.

IPC Classes  ?

• C23G 1/08 - Iron or steel
• B22D 11/00 - Continuous casting of metals, i.e. casting in indefinite lengths
• C21D 6/00 - Heat treatment of ferrous alloys
• C21D 8/02 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
• C21D 9/52 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for wiresHeat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for strips
• C22C 33/04 - Making ferrous alloys by melting
• C22C 38/00 - Ferrous alloys, e.g. steel alloys
• C22C 38/02 - Ferrous alloys, e.g. steel alloys containing silicon
• C22C 38/04 - Ferrous alloys, e.g. steel alloys containing manganese
• C22C 38/06 - Ferrous alloys, e.g. steel alloys containing aluminium
• C22C 38/34 - Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of silicon
• C22C 38/42 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
• C22C 38/44 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
• C22C 38/46 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
• C22C 38/48 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with niobium or tantalum
• C22C 38/50 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium

Abstract

The invention provides a high heat input welding steel plate and a manufacturing method therefor. The chemical composition of the high heat input welding steel plate comprises, by mass percentages: C≤0.1%, Si≤0.15%, S≤0.004%, Mn+Cr+Ni+Cu: 1.5-4.5%, Cr/Ni/Cu mass ratio: 1:2:1, Ti+Mg+Zr+Ca: 0.03-0.3%, Ti+Mg: 0.03-0.2%, and the rest being Fe and unavoidable impurities; a carbon equivalent Ceq is 0.36-0.42, and Ceq=C+Mn/6+(Cr+Mo+V)/5+(Ni+Cu)/15. In the manufacturing process for the steel plate, zirconium-calcium cored wire is added during RH refining, slabs are continuously cast after RH tapping, and the slabs undergo rolling in a recrystallization zone and rolling in a non-recrystallization zone, which can promote the formation of acicular ferrite and improve the crack arrest performance of the steel plate.

IPC Classes  ?

• C22C 38/58 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese
• C22C 38/04 - Ferrous alloys, e.g. steel alloys containing manganese
• C21D 8/02 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips

Abstract

2233: ≤ 5%, MgO: 4-8%, and [MnO+T.Fe] = 2-5%.

IPC Classes  ?

• C22C 33/06 - Making ferrous alloys by melting using master alloys
• C22C 38/02 - Ferrous alloys, e.g. steel alloys containing silicon
• C22C 38/04 - Ferrous alloys, e.g. steel alloys containing manganese
• C22C 38/06 - Ferrous alloys, e.g. steel alloys containing aluminium
• C22C 38/18 - Ferrous alloys, e.g. steel alloys containing chromium
• B22D 41/02 - Linings
• C21C 7/00 - Treating molten ferrous alloys, e.g. steel, not covered by groups
• C21C 7/06 - Deoxidising, e.g. killing

Abstract

A blast furnace edge airflow stability control method, comprising: constructing a database; and selecting blast furnace operation parameters satisfying a first preset condition from the database to generate a blast furnace operation parameter setting instruction for the next operation stage, wherein the first preset condition comprises: PD < a preset value PD0, and a blast furnace operation parameter corresponding to the minimum value of a PU is selected when the condition is satisfied.

IPC Classes  ?

• C21B 7/10 - CoolingDevices therefor
• C21B 7/00 - Blast furnaces
• G06F 119/08 - Thermal analysis or thermal optimisation
• G06F 119/00 - Details relating to the type or aim of the analysis or the optimisation

Abstract

Disclosed in the present invention is a high-speed wire coil shape and position detection method based on infrared technology. The method comprises: acquiring an original material image on a wire coil conveying roller track, and converting same into a corresponding grayscale image; performing noise reduction processing on the grayscale image by using a standard median filtering method; then, acquiring an edge contour and a depression point of a coil by using a bidirectional threshold segmentation method; and performing fitting using a least squares fitting algorithm, so as to obtain a corresponding equivalent ellipse, taking a calculated position of the central point and a calculated length of the major axis of the equivalent ellipse as the position of the center and the diameter of a wire coil layer corresponding to a curve segment combination, and calculating the shapes and positions of all the coils in the current original material image. In the present invention, the shapes and positions of all coils are acquired by means of analyzing and extracting contours and depression points and by means of a curve pairing method; and with regard to situations such as a sudden change, a production line operator is reminded in a timely manner to perform corresponding processing, thereby reducing product quality problems.

IPC Classes  ?

• G01B 11/00 - Measuring arrangements characterised by the use of optical techniques
• G01B 11/24 - Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures
• G06T 7/00 - Image analysis
• G06T 7/12 - Edge-based segmentation
• G06T 7/136 - SegmentationEdge detection involving thresholding
• G06T 7/62 - Analysis of geometric attributes of area, perimeter, diameter or volume
• G06T 7/64 - Analysis of geometric attributes of convexity or concavity
• G06T 7/73 - Determining position or orientation of objects or cameras using feature-based methods

Abstract

LSLSS≤45 ℃. The steel wire rod for the welding wire is reasonable in the design of components and mass percentages, the desulfurization cost in a steelmaking process is reduced, the metal fluidity of welding seams is good, the weld pool is fast to solidify, and the welding seam forming property is good. The problem of downward flowing and falling of welding seam metal at a 12 o'clock position during all-position welding is solved. The surface of the welding seams is uniform and smooth during all-position welding, and welding bead presents an aesthetic form. The present invention further relates to a gas shielded arc welding wire and a production method of the steel wire rod for the gas shielded arc welding wire.

IPC Classes  ?

• B23K 35/30 - Selection of soldering or welding materials proper with the principal constituent melting at less than 1550°C
• B23K 35/40 - Making wire or rods for soldering or welding
• B23K 35/02 - Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape

Abstract

The present invention discloses a high-value processing method for a solid waste containing zinc and iron, and belongs to the technical field of metal recycling. The method comprises the following steps: washing, filtering, drying, and grinding a solid waste containing zinc and iron to obtain a washed sample; adding the washed sample into a deep eutectic solvent of choline chloride-oxalic acid dihydrate, performing heating and stirring until a clear solution is obtained, and leaving the solution to stand; adding a supernatant of the solution after being left to stand into deionized water, hydrolyzing and filtering the mixture to obtain a filtrate and a residue, and drying and roasting the residue to obtain nano-zinc oxide; and leaving the filtrate to stand, and filtering, drying and roasting the filtrate to obtain nano-ferric oxide. The present invention can efficiently separate zinc oxide and ferric oxide from a solid waste containing zinc and iron, and prepare nano-zinc oxide and nano-ferric oxide without adding a surfactant.

IPC Classes  ?

• C01G 9/02 - OxidesHydroxides
• C01G 49/06 - Ferric oxide [Fe2O3]
• C22B 7/02 - Working-up flue dust
• C22B 3/16 - Extraction of metal compounds from ores or concentrates by wet processes by leaching in organic solutions
• C22B 19/34 - Obtaining zinc oxide
• C22B 1/02 - Roasting processes
• B82Y 30/00 - Nanotechnology for materials or surface science, e.g. nanocomposites
• B82Y 40/00 - Manufacture or treatment of nanostructures

Abstract

The present invention relates to the field of smelting, and disclosed is a low-cost smelting and continuous casting method for pre-hardened plastic mold steel, comprising: step 1, smelting molten steel in a converter; step 2, ladle refining; step 3, performing degassing treatment; and step 4, performing continuous casting to obtain a casting blank. According to the present invention, the total casting furnace number in step 4 is within the range of 12-17 furnaces of steel, due to the increase of the continuous casting furnace number, the residual steel amount of a tundish, the loss of scrap steel of cut heads and cut tails, the consumption of each piece of refractory per ton of steel, etc. are all reduced, and the production costs of each ton of steel is reduced; and in step 4 of the present invention, the continuous casting furnace number is increased by quickly changing a water port, and the length of the head blank (abnormal blank) is controlled, such that the effect of the abnormal blank on the yield can be reduced from 4.6% to 2.9%.

IPC Classes  ?

• C22C 33/06 - Making ferrous alloys by melting using master alloys
• C22C 38/02 - Ferrous alloys, e.g. steel alloys containing silicon
• C22C 38/04 - Ferrous alloys, e.g. steel alloys containing manganese
• C22C 38/06 - Ferrous alloys, e.g. steel alloys containing aluminium
• C22C 38/42 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
• C22C 38/44 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
• B22D 11/00 - Continuous casting of metals, i.e. casting in indefinite lengths
• C21C 5/28 - Manufacture of steel in the converter
• C21C 7/072 - Treatment with gases
• C21C 7/10 - Handling in vacuum

Abstract

Disclosed in the present invention is an ultra-thick material layer sintering process, which belongs to the technical field of iron ore smelting. The process comprises the following steps: dividing a uniformly mixed ore into an upper-layer material and a lower-layer material according to the mass ratio of 1:(0.6-1.5); respectively adding a flux and a fuel to the upper-layer material and the lower-layer material, and then performing primary mixing and secondary mixing, wherein the mass of the fuel in the upper-layer material is not less than the mass of the fuel in the lower-layer material; respectively feeding the upper-layer material and the lower-layer material, which have been subjected to the secondary mixing, into two feeding bins, carrying out a material distribution according to the sequence of the lower-layer material being prior to the upper-layer material, and carrying out sintering after ignition. According to the present invention, a 1-1.5 m ultra-thick material layer is sintered by means of the process of separately adding upper and lower layer fuels, mixing the materials in batches and distributing the upper-layer material and the lower-layer material; and the yield can be improved, the burnup can be reduced, and the quality can be stabilized.

IPC Classes  ?

• C22B 1/16 - SinteringAgglomerating

Abstract

The present invention provides acid-resistant pipeline steel and a manufacturing method therefor. The manufacturing method comprises: performing a pre-desulfurization treatment on molten iron by means of a mechanical stirring method, so that the mass percentage of S in the molten iron is less than or equal to 0.0020%; adding, according to design of compositions, corresponding metals to the molten iron for converter smelting, and controlling the mass percentage of S in molten steel to be less than or equal to 0.0020% and the mass percentage of P to be less than or equal to 0.018%; in a tapping process, adding silicon-manganese, aluminum ingot, micro-carbon ferrochromium, ferro-molybdenum alloy, and lime, so that the mass percentage of Mn in the molten steel is less than or equal to 0.90%, the mass percentage of C is less than or equal to 0.06%, and the sum of the mass percentages of Cr and Mo is greater than or equal to 0.40%; performing ladle refining and RH vacuum treatments, so that the mass percentage of Nb in the molten steel to be greater than or equal to 0.060%, the mass percentage of Ti is greater than or equal to 0.010%, and the sum of the mass percentages of Nb and Ti is greater than or equal to 0.085%; feeding a Ca wire to the molten steel for soft stirring, a superheating degree of casting being no lower than 30°C; and forming a steel plate. The manufacturing method is economical in compositions and facilitates smelting and production.

IPC Classes  ?

• C22C 38/02 - Ferrous alloys, e.g. steel alloys containing silicon
• C22C 38/04 - Ferrous alloys, e.g. steel alloys containing manganese
• C22C 38/06 - Ferrous alloys, e.g. steel alloys containing aluminium
• C22C 38/26 - Ferrous alloys, e.g. steel alloys containing chromium with niobium or tantalum
• C22C 38/28 - Ferrous alloys, e.g. steel alloys containing chromium with titanium or zirconium
• C22C 38/20 - Ferrous alloys, e.g. steel alloys containing chromium with copper
• C22C 38/22 - Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
• C22C 38/48 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with niobium or tantalum
• C22C 38/50 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
• C22C 38/44 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
• C22C 38/42 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
• C22C 33/06 - Making ferrous alloys by melting using master alloys
• C21D 8/02 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips

Abstract

The present invention belongs to the technical field of coating layers, and specifically discloses a method for controlling the painting shrinkage cavity defect of a tinplate. A layer of surface structure with a good coating property is formed on the surface of the tinplate by controlling a leveling process of the surface structure of the tinplate and controlling a passivation and drying process of a passivation film layer on the surface of the tinplate, wherein the surface structure is composed of a passive film and an oil film, the surface roughness Ra is 0.4-0.6 μm, and the surface peak density RPc is 70-90 pieces/cm. In addition, the surface oxidation degree is reduced by controlling the storage environment of the tinplate after shearing and before printing and coating, so that a good wettability is kept, and it is ensured that the surface of the tinplate has good coatability before coating, and the problem of painting shrinkage cavity of the tinplate is solved fundamentally. The control method of the present invention is simple and easy to implement, can meet the requirements of coating the tinplate with coatings such as white coating and golden yellow base oil and can be used in factories in southern humid and hot environments, and the occurrence rate of shrinkage cavities is greatly reduced from 0.5% in the traditional process to 0.02% or less.

IPC Classes  ?

• C25D 5/36 - Pretreatment of metallic surfaces to be electroplated of iron or steel
• C25D 5/48 - After-treatment of electroplated surfaces
• C25D 7/06 - WiresStripsFoils
• C25D 11/38 - Chromatising
• C25D 3/30 - ElectroplatingBaths therefor from solutions of tin
• B05D 7/14 - Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies
• C23F 11/02 - Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent in air or gases by adding vapour phase inhibitors

Abstract

Disclosed in the present invention are a non-oriented silicon steel for a new energy drive motor, and a production method therefor. The silicon steel is prepared by means of steelmaking, continuous casting, hot rolling, normalizing, acid pickling, non-preheating single-stand cold rolling, annealing, cooling, coating, and finishing which are sequentially carried out. No Cu, Cr, Ni, Nb, V, and Ti are added during steelmaking; the silicon steel has the following chemical components: 2.95-3.15% of Si, 0.75-0.95% of Al, 4.6-4.9% of Si + 2Al, 0.5-0.7% of Mn, 0.03-0.04% of Sn, less than or equal to 0.0025% of C, and the balance of iron, wherein Mn/S ≥ 380, and Al/N ≥ 200. By means of the present invention, the strength is improved, while the magnetic performance is ensured, such that the problem of the balance between the magnetic performance and the strength present in the prior art is solved, and the application requirement for the drive motor of a new energy automobile can be met.

IPC Classes  ?

• C22C 38/02 - Ferrous alloys, e.g. steel alloys containing silicon
• C22C 38/04 - Ferrous alloys, e.g. steel alloys containing manganese
• C22C 38/20 - Ferrous alloys, e.g. steel alloys containing chromium with copper
• C22C 38/42 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
• C22C 38/48 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with niobium or tantalum
• C22C 38/26 - Ferrous alloys, e.g. steel alloys containing chromium with niobium or tantalum
• C22C 38/46 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
• C22C 38/24 - Ferrous alloys, e.g. steel alloys containing chromium with vanadium
• C22C 38/50 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
• C22C 38/28 - Ferrous alloys, e.g. steel alloys containing chromium with titanium or zirconium
• C22C 33/04 - Making ferrous alloys by melting
• C21D 8/12 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties

Abstract

The present invention relates to a material shifting air cylinder device for delaying double-scale operation of finished products and an operation method. The material shifting air cylinder device comprises a first input roller way section, a second input roller way section and a third input roller way section which are sequentially arranged. A first thermal detection device and a second thermal detection device are sequentially arranged at the input end of the first input roller way section, an air cylinder is installed at the output end of the first input roller way section, and the pushing end of the air cylinder is in contact with the first input roller way section. A gap is reserved between the output end of the first input roller way section and the input end of the second input roller way section, and the output end of the second input roller way section is joined to the input end of the third input roller way section. Also comprised is a movable wall, located on one side of the second input roller way section and the third input roller way section and extending from the output end of the first input roller way section to the output end of the third input roller way section. The present invention can solve the problem of end-to-end connection caused by fast double-scale line speed of finished products, and the yield is improved.

IPC Classes  ?

• B65G 47/82 - Rotary or reciprocating members for direct action on articles or materials, e.g. pushers, rakes, shovels
• B65G 47/52 - Devices for transferring articles or materials between conveyors, i.e. discharging or feeding devices
• B21B 43/00 - Cooling beds, whether stationary or movingMeans specially associated with cooling beds, e.g. for braking work or for transferring it to or from the bed
• B21B 15/00 - Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills

Abstract

2 and sizes of inclusions are ≤30 μm; casting the molten steel into an ingot blank with a center carbon segregation value of 0.92-1.08; cogging the ingot blank into an intermediate blank with a center carbon segregation value of 0.95-1.05; rolling the intermediate blank into a wire rod; and performing temperature control cooling on the wire rod to obtain a wire rod with high purity, high homogeneity and tensile strength ≤1,150 MPa. The wire rod may be used for an ultrahigh-strength steel cord with single tensile strength ≥3,600 MPa.

IPC Classes  ?

• C21D 11/00 - Process control or regulation for heat treatments
• B21B 1/46 - Metal rolling methods or mills for making semi-finished products of solid or profiled cross-sectionSequence of operations in milling trainsLayout of rolling-mill plant, e.g. grouping of standsSuccession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting
• B21B 45/00 - Devices for surface treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
• B22D 11/115 - Treating the molten metal by using agitating or vibrating means by using magnetic fields
• C21C 7/064 - DephosphorisingDesulfurising
• C21C 7/068 - Decarburising
• C21C 7/10 - Handling in vacuum
• C21D 6/00 - Heat treatment of ferrous alloys
• C21D 8/06 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires
• C21D 9/52 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for wiresHeat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for strips
• C22C 38/00 - Ferrous alloys, e.g. steel alloys
• C22C 38/02 - Ferrous alloys, e.g. steel alloys containing silicon
• C22C 38/04 - Ferrous alloys, e.g. steel alloys containing manganese
• C22C 38/06 - Ferrous alloys, e.g. steel alloys containing aluminium
• C22C 38/42 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
• C22C 38/44 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
• C22C 38/46 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
• C22C 38/48 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with niobium or tantalum
• C22C 38/50 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium

Abstract

The present invention reveals an ultra-thin ultra-high strength steel wire, a wire rod for an ultra-thin ultra-high strength steel wire and its producing method. The chemical components of the wire rod comprise in percentage by mass: C 0.90˜0.96%, Si 0.12˜0.30%, Mn 0.30˜0.65%, Cr 0.10˜0.30%, Al≤0.004%, Ti≤0.001%, Cu≤0.01%, Ni≤0.01%, S≤0.01%, P≤0.01%, O≤0.0006%, N≤0.0006%, and the balance is Fe and unavoidable impurity elements. The wire rod for the ultra-thin ultra-high strength steel wire may be used as a base material for producing the ultra-thin ultra-high strength steel wire having a diameter in a range of 50˜60 μm and a tensile strength larger than or equal to 4500 MPa.

IPC Classes  ?

• C22C 38/50 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
• B21B 1/16 - Metal rolling methods or mills for making semi-finished products of solid or profiled cross-sectionSequence of operations in milling trainsLayout of rolling-mill plant, e.g. grouping of standsSuccession of passes or of sectional pass alternations for rolling wire or material of like small cross-section
• C21D 9/52 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for wiresHeat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for strips
• C22B 9/18 - Electroslag remelting
• C22C 33/04 - Making ferrous alloys by melting
• C22C 38/00 - Ferrous alloys, e.g. steel alloys
• C22C 38/04 - Ferrous alloys, e.g. steel alloys containing manganese
• C22C 38/06 - Ferrous alloys, e.g. steel alloys containing aluminium
• C22C 38/18 - Ferrous alloys, e.g. steel alloys containing chromium
• C22C 38/42 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper

Abstract

There is provided a high-carbon steel wire rod and a preparation method thereof. Wherein, the high-carbon steel wire rod comprising the following ingredients: C, Si, Mn, Cr, V, Ti and Fe. The high-carbon steel wire rod has satisfactory mechanical properties, including high strength with an average tensile strength of 1560 MPa as well as good plasticity with an average after-fracture shrinkage rate of 30% and an after-fracture elongation percentage larger than or equal to 9%, which can meet the performance requirements for producing 2300 MPa level pre-stressed steel strand.

IPC Classes  ?

• B21C 1/02 - Drawing metal wire or like flexible metallic material by drawing machines or apparatus in which the drawing action is effected by drums
• C21D 8/06 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires
• C21D 9/52 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for wiresHeat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for strips
• B22D 11/00 - Continuous casting of metals, i.e. casting in indefinite lengths
• C22C 33/04 - Making ferrous alloys by melting
• C22C 38/02 - Ferrous alloys, e.g. steel alloys containing silicon
• C22C 38/04 - Ferrous alloys, e.g. steel alloys containing manganese
• C22C 38/06 - Ferrous alloys, e.g. steel alloys containing aluminium
• C22C 38/22 - Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
• C22C 38/24 - Ferrous alloys, e.g. steel alloys containing chromium with vanadium
• C22C 38/26 - Ferrous alloys, e.g. steel alloys containing chromium with niobium or tantalum
• C22C 38/28 - Ferrous alloys, e.g. steel alloys containing chromium with titanium or zirconium
• C22C 38/32 - Ferrous alloys, e.g. steel alloys containing chromium with boron

Abstract

A method for detecting an air flow distribution in a blast furnace, taking into account a heat exchange between an air flow and a solid material bed and the effect of a distribution of a material layer structure in a radial direction of a blast furnace on the radial air permeability of the blast furnace, which affects a mode of air flow distribution, wherein the distribution of the air flow and the radial material layer structure of the blast furnace can be calculated by combining a cross-shaped temperature-measuring gun and other main blast furnace operating parameters. According to the detection method, a blast furnace operator can timely and accurately infer, from a change in a current radial air flow temperature distribution, the direction of change of the distribution of the air flow and the radial material layer structure at a furnace throat portion, thus providing a direction for the adjustment of a material distribution system, ensuring the blast furnace to run stably and smoothly, extending a service life and reducing a fuel ratio without other expensive detecting instruments.

IPC Classes  ?

• C21B 5/00 - Making pig-iron in the blast furnace
• C21B 7/24 - Test rods or other checking devices

Abstract

Rebar comprising the following ingredients: C 0.005-0.030%, Si 0.3—0.6%, Mn 1.2—2.5%, P≤0.01%, S≤0.01%, Cr 8.0-10.0%, Mo 1.0—3.0%, Sn 0.2—0.4%, Re0.01-0.05%, and the balance being Fe and unavoidable impurities. Also provided is a rebar preparation method. The rebar has good comprehensive mechanical properties and corrosion resistance property, and can be used in rebar concrete structures in a marine environment.

IPC Classes  ?

• C22C 38/38 - Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of manganese
• C22C 38/22 - Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
• C22C 38/28 - Ferrous alloys, e.g. steel alloys containing chromium with titanium or zirconium
• C22C 38/24 - Ferrous alloys, e.g. steel alloys containing chromium with vanadium
• C21C 1/02 - Dephosphorising or desulfurising
• C21C 5/30 - Regulating or controlling the blowing
• C21C 7/10 - Handling in vacuum
• C21C 7/068 - Decarburising
• C21C 7/06 - Deoxidising, e.g. killing
• C21D 8/08 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires for concrete reinforcement

Abstract

Disclosed is a submerged arc welding wire, comprising the following at mass percentage: 0.85-1.60% of Mo; 2.50-4.50% of Ni; 0.10-0.30% of Ti; 0.005-0.02% of B; 0.005-0.02% of REM; 1.60-2.00% of Mn; C which is greater than 0 and less than or equal to 0.06%; Si which is greater than 0 and less than or equal to 0.10%; P which is less than or equal to 0.008%; S which is less than or equal to 0.006%; and the balance being Fe. Also disclosed are a welding method and a weld metal. The welding process by the submerged arc welding wire and welding method and the welded welding joint have relatively high tensile strength and relatively good low temperature toughness, and the welding process has a relatively high welding speed, so that the requirements for X120 pipeline welding and pipe manufacturing can be satisfied.

IPC Classes  ?

• B23K 35/30 - Selection of soldering or welding materials proper with the principal constituent melting at less than 1550°C
• B23K 9/18 - Submerged-arc welding

Abstract

Provided are a high-carbon steel wire rod and a preparation method therefor, wherein the high-carbon steel wire rod comprises the following components: C, Si, Mn, Cr, V, Ti and Fe. The high-carbon steel wire rod has comparatively ideal mechanical properties, including not only relatively high strength but also outstanding plasticity, wherein the average tensile strength can reach 1560MPa, the average shrinkage rate after fracture is 30%, and the percentage elongation after fracture is greater than or equal to 9%. The high-carbon steel wire rod can meet the performance requirements for producing 2300MPa pre-stressed steel strands.

IPC Classes  ?

• C22C 38/28 - Ferrous alloys, e.g. steel alloys containing chromium with titanium or zirconium