Embodiments of the present invention relate to a cover device which can open/close the opening of a ladle capable of accommodating molten steel, and which may comprise: a cover member which can be supported on or separated from the ladle such that the opening of the ladle can be opened and closed; and a protruding member extending downward from the lower surface of the cover member so as to be immersed in a slag layer floating on the molten steel. Therefore, according to embodiments of the present invention, an operation of destroying a solidified slag layer prior to a refining operation can be omitted. In addition, even if the operation of destroying the solidified slag layer is performed as necessary, the solidified slag layer can be more easily and more quickly destroyed than that destroyed by a conventional device. Therefore, refining operation time is shortened.
According to the present disclosure, an asymmetric rolling apparatus comprises: a small-diameter work roll that comes in contact with one surface of a material to be rolled; and a large-diameter work roll that comes in contact with the other surface of the material to be rolled and has a diameter larger than that of the small-diameter work roll, wherein the centers of the small-diameter work roll and the large-diameter work roll are arranged to be offset from each other. The small-diameter work roll is disposed such that the center thereof is eccentric from the center of the large-diameter work roll, so as to apply maximum shear deformation during rolling, thereby enabling productivity to be ensured.
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
According to the present disclosure, an asymmetric rolling apparatus comprises: a small-diameter work roll that comes into contact with one surface of a material to be rolled; and a large-diameter work roll that comes into contact with the other surface of the material to be rolled and has a larger diameter than the small-diameter work roll. The diameter of the small-diameter work roll is within 70-90 mm, and the diameter of the large-diameter work roll is within 2-5 times the diameter of the small-diameter work roll.
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
The present invention relates to an iron core for a transformer having low no-load loss and a method for manufacturing same. According to an embodiment of the present invention, the iron core for a transformer comprises: a first stacking unit formed by stacking a plurality of electrical steel sheets in a first direction and positioned to form a continuous surface in a second direction intersecting the first direction; and a second stacking unit formed by stacking a plurality of electrical steel sheets in the first direction and positioned to form a continuous surface in a third direction intersecting the first direction and the second direction, wherein a coupling unit in which the first stacking unit and the second stacking unit are connected includes a stepped portion formed at a first end, which is an end of the electrical steel sheet included in the first stacking unit, and an accommodation unit in which a second end, which is an end of the electrical steel sheet included in the second stacking unit, is shape-coupled to the stepped portion, and the electrical steel sheets included in the first stacking unit and the second stacking unit are stacked in a step lap manner in the first direction.
H01F 27/245 - Magnetic cores made from sheets, e.g. grain-oriented
H01F 27/26 - Fastening parts of the core togetherFastening or mounting the core on casing or support
H01F 41/02 - Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformersApparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils or magnets
5.
LOW THERMAL EXPANSION STEEL AND METHOD FOR MANUFACTURING SAME
A low thermal expansion steel according to an embodiment of the present invention comprises, in weight %, C: 0.000% (exclusive) to 0.040% (inclusive), Si: 0.080% to 0.200% (both inclusive), Mn: 0.150% to 0.450% (both inclusive), P: 0.000% (exclusive) to 0.0030% (inclusive), S: 0.0000% (exclusive) to 0.0030% (inclusive), Cr: 0.00% (exclusive) to 2.00% (inclusive), Ni: 34.0% to 39.0% (both inclusive), Co: 0.000% (exclusive) to 0.400% (inclusive), with the balance being Fe and inevitable impurities, and satisfies the value of formula (1) 0.5×[Cr] − [Ni] − 2.7×[Mn] − 4×[Co] + 40 ranging from 0.00 to 4.00 (both inclusive).
The present invention relates to an iron core for a transformer having low no-load loss and a manufacturing method thereof. The iron core for a transformer according to an embodiment of the present invention includes a core subpart in which multiple steel sheets are stacked and which includes a through-hole penetrating in a stacking direction, wherein a direction intersecting the stacking direction is defined as a first direction and a direction intersecting the stacking direction and the first direction is defined as a second direction, and a ratio (D/W) of a diameter (D) to a width (W) of the through-hole is 0.02 to 0.20 under the assumption that a shorter length is defined as a width (W) when comparing a length in the first direction and a length in the second direction in the core subpart.
H01F 27/245 - Magnetic cores made from sheets, e.g. grain-oriented
H01F 27/26 - Fastening parts of the core togetherFastening or mounting the core on casing or support
H01F 41/02 - Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformersApparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils or magnets
A tube for a transportation system is disclosed. The tube for a transportation system according to one embodiment comprises a plurality of segments disposed along the circumference of a traveling path of a traveling body and connected to each other to form a traveling space in which the traveling body can travel, wherein each of the segments comprises: a segmented panel surrounding the circumference of the traveling space on a cross section orthogonal to the traveling path; and a reinforcing member including a first reinforcing part extending from the segmented panel toward the traveling space and a second reinforcing part extending from the first reinforcing part in a direction intersecting the extension direction of the first reinforcing part.
A tube for a transportation system, according to the present disclosure, comprises: a first pipe having a first cut portion of which the width in the vertical direction perpendicular to the lengthwise direction is gradually reduced along the lengthwise direction; and a second pipe having a second cut portion having a shape corresponding to the first cut portion. The first pipe and the second pipe are coupled such that the first cut portion and the second cut portion face each other.
Embodiments of the present disclosure relate to a nozzle engagement device and method in which image information having a preset range of wavelength blocked is received using one or more cameras, a first nozzle and a second nozzle are identified on the basis of the image information, position information of the first nozzle and position information of the second nozzle are calculated on the basis of the image information, position difference information is calculated on the basis of the position information of the first nozzle and the position information of the second nozzle, whether the position difference information satisfies a preset criterion is determined, and either the first nozzle or the second nozzle is moved or the first nozzle and the second nozzle are engaged on the basis of the position difference information according to whether the position difference information satisfies the preset criterion.
The present invention relates to a hot formed part for use in components such as automotive structural members and reinforcements, and to a manufacturing method thereof.
Provided are a device and a method for detecting an anomaly of an electrode rod through the steps of: collecting time series data from a plurality of sensors used for process monitoring of an electric furnace; reconstructing input time series data of a predetermined size by using a reconstruction-based artificial neural network model; calculating a reconstruction error between the input time series data and the reconstructed time series data; and determining, on the basis of the reconstruction error, whether the electrode rod is damaged.
F27B 3/28 - Arrangement of controlling, monitoring, alarm or like devices
F27B 3/08 - Hearth-type furnaces, e.g. of reverberatory typeElectric arc furnaces heated electrically, e.g. electric arc furnaces, with or without any other source of heat
A sub material feeding device of an electric furnace and an electric furnace having same are disclosed. The sub material feeding device of an electric furnace, according to one embodiment, comprises: a chute that supplies sub material to a sub material input port provided in a roof of an electric furnace body from above the sub material input port; and a sub material feeder that supplies the sub material to the chute from above the chute, wherein the chute includes: an upper inlet that receives the sub material from the sub material feeder; a lower outlet that supplies the sub material to the sub material input port; and a connecting portion that connects and provides communication between the inlet and the outlet, wherein the outlet is configured to be ventilated in a vertical direction, and the connecting portion communicates with the outlet through a side surface of the outlet and is provided with an injection port for injecting air downward, wherein the injection port may include a first injection port disposed in an upper region of the connecting portion.
A method for monitoring a condition of a blast furnace, according to an embodiment, comprises the steps of: obtaining real-time acoustic data of an electric furnace from an acoustic sensor arranged adjacent to the electric furnace; generating a frequency image obtained by imaging the acoustic data by performing frequency time series analysis on the obtained acoustic data; extracting an acoustic pattern corresponding to a dissolution state of the electric furnace on the basis of the frequency image by using an artificial intelligence-based autoencoder; and generating an acoustic feature map from the acoustic pattern, the acoustic feature map obtained by visualizing the acoustic pattern in time series.
The present invention relates to an iron core of a transformer in which no-load loss is low. The iron core of a transformer comprises core sub-parts in which a plurality of steel sheets are stacked and which include coupling holes that pass through in the stacking direction, wherein the number of the coupling holes is two or less. A plurality of the core subparts are disposed in a direction crossing the stacking direction.
A non-magnetic austenitic stainless steel according to the present invention comprises, by wt%, 0.01-0.04% of C, Si in an amount of more than 0% and equal to or less than 1.0%, 0.5-1.2% of Mn, 16.0-22.5% of Cr, 9-11.5% of Ni, Mo in an amount of more than 0% and equal to or less than 1%, 0.2-1.5% of Cu, 0.01-0.25% of N, 0.001-0.005% of Ti, B in an amount of more than 0% and equal to or less than 0.003%, Al in an amount of more than 0% and equal to or less than 0.005%, and the balance of Fe and other inevitable impurities, and satisfies relations (1) and (2). Relation (1): 0 < 3×(Cr+Mo)+5×Si-65×(C+N)-2×(Ni+Mn)-28 ≤ 5 Relation (2): 1842+878×C-26.7×Si+1.21×Mn-58.6×Cr+48.1×Ni-63.4×Mo-283×Ti+58.5×Cu-75.4×Al+923×N ≤ 1296 (In relations (1) and (2), C, Si, Mn, Cr, Ni, Mo, Cu, N, Ti and Al represent the wt% of the respective elements.)
The present invention provides an apparatus and a method for controlling a vehicle and a vehicle system having same. According to an embodiment, the apparatus for controlling a vehicle comprises: a processor; and a storage medium storing instructions executable by the processor, wherein the processor is configured to execute the instructions to: determine a driving mode on the basis of traveling information of a vehicle; determine the shaft ratios of a plurality of motors included in the vehicle on the basis of the driving mode and a boundary speed; and drive the vehicle on the basis of the shaft ratios of the plurality of motors.
B60L 15/38 - Control or regulation of multiple-unit electrically-propelled vehicles with automatic control
B60L 15/20 - Methods, circuits or devices for controlling the propulsion of electrically-propelled vehicles, e.g. their traction-motor speed, to achieve a desired performanceAdaptation of control equipment on electrically-propelled vehicles for remote actuation from a stationary place, from alternative parts of the vehicle or from alternative vehicles of the same vehicle train for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed
17.
MARTENSITIC STAINLESS STEEL AND METHOD OF MANUFACTURING SAME
A martensitic stainless steel according to one embodiment of the present invention can be a martensitic stainless steel comprising, by wt%, 0.500-0.800% of carbon (C), 0.200-1.000% of silicon (Si), 0.300-1.000% of manganese (Mn), 0.001-0.500% of copper (Cu), 0.007-1.000% of nickel (Ni), 12.000-15.000% of chromium (Cr), 0.050-1.000% of molybdenum (Mo), 0.030-0.500% of vanadium (V), 0.003-0.100% of titanium (Ti), 0.020-1.000% of nitrogen (N), and the balance of iron (Fe) and inevitable impurities, wherein the value of carbide index relation (1) 327*[C]+25*[Si]-0.9*[Mn]+18*[Cu]+8.6*[Ni]+13.8*[Cr]+2.3*[Mo]+74*[V]+35*[Ti]-191*[N] is 425 or less.
C22C 38/02 - Ferrous alloys, e.g. steel alloys containing silicon
C22C 32/00 - Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ
C21D 8/04 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing
18.
STAINLESS STEEL MATERIAL FOR DIFFUSION BONDING, AND MANUFACTURING METHOD AND DIFFUSION BONDING METHOD THEREFOR
One aspect of the present invention is to provide a stainless steel material having excellent diffusion bonding properties and a method for manufacturing same. In addition, another aspect of the present invention is to provide a method for diffusion bonding of the steel material capable of securing high strength and excellent low-temperature impact toughness.
RESEARCH INSTITUTE OF INDUSTRIAL SCIENCE & TECHNOLOGY (Republic of Korea)
Inventor
Jeong, Cheon-Woo
Kim, Ji-Won
Kim, Sung-Joong
Kim, Joon-Woo
Ryoo, Ho-Geun
Lee, Dong-Cheol
Jung, Suk-Yong
Song, Han-Dock
Ha, Chang-Ho
Park, Yun-Sung
Moon, Gun-Hyeok
Abstract
The present invention provides an ammonia recovery device comprising: a first ammonia purification column for separating impurity gas from a mixed gas containing ammonia; a second ammonia purification column for separating a first residual impurity gas from the mixed gas that has passed through the first ammonia purification column; and a third ammonia purification column for separating a second residual impurity gas from the mixed gas that has passed through the second ammonia purification column.
A method for operating an electric furnace after pausing the operation thereof, according to the present disclosure, comprises: feeding pig iron, through a supplementary material feed port of the electric furnace, to deposit same underneath an electrode rod of the electric furnace while a roof of the electric furnace is closed; applying a high current to the electrode rod to melt the pig iron to produce a molten material; and introducing scrap into the molten material through a side opening of the electric furnace so as to melt the scrap.
The present invention provides a vehicle wheel disk comprising: a fixing unit; and a spoke unit extending radially outward from the fixing unit. The fixing unit comprises: a fixing body having a fixing hole formed through the center portion thereof; and multiple fastening portions formed in the fixing body and spaced apart from each other around the fixing hole to be fastened to an object to be fixed. When a virtual circle connecting the center portions of fastening holes of the fastening portions is referred to as a hole connection circle and when a portion surrounded by the hole connection circle, the spoke unit, and the fastening portions is referred to as a reference area, the fixing unit comprises a reference surface that is brought into contact with the object to be fixed in at least a partial area of the reference area when installed on the object to be fixed.
The present invention relates to a reduced iron producing facility and method and, more specifically, to a reduced iron producing facility and method for producing reduced iron by reducing a raw material. A reduced iron producing facility according to an embodiment of the present invention comprises: a reduction unit capable of producing reduced iron; a thermal decomposition unit capable of preparing hydrogen gas and solid carbon by thermally decomposing hydrocarbon-containing gas; and a connection unit connecting the reduction unit and the thermal decomposition unit so that at least a portion of exhaust gas discharged from the reduction unit can be supplied to the reduction unit together with the hydrogen gas prepared by the thermal decomposition unit.
C01B 3/26 - Production of hydrogen or of gaseous mixtures containing hydrogen by decomposition of gaseous or liquid organic compounds of hydrocarbons using catalysts
B01J 19/00 - Chemical, physical or physico-chemical processes in generalTheir relevant apparatus
23.
APPARATUS AND METHOD FOR CONTROLLING VEHICLE AND VEHICLE SYSTEM INCLUDING SAME
The present invention provides an apparatus and method for controlling a vehicle and a vehicle system including same. An embodiment provides an apparatus for controlling a vehicle, the apparatus comprising a processor and a storage medium storing instructions executable by the processor. By executing the instructions, the processor is configured to: measure the speed of the vehicle; determine an axle ratio of the vehicle on the basis of the speed of the vehicle and a preset boundary speed; and drive the vehicle on the basis of the axle ratio.
B60L 15/20 - Methods, circuits or devices for controlling the propulsion of electrically-propelled vehicles, e.g. their traction-motor speed, to achieve a desired performanceAdaptation of control equipment on electrically-propelled vehicles for remote actuation from a stationary place, from alternative parts of the vehicle or from alternative vehicles of the same vehicle train for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed
The present invention relates to a buffer tank provided in an air conditioning system of a data center, and a distributor provided in the buffer tank. There may be provided: a distributor that can prevent destruction of a water-temperature stratification layer; and a buffer tank equipped with same.
The present invention relates to a buffer tank provided in an air conditioning system of a data center, and a distributor provided in the buffer tank, and may provide: a distributor which can prevent breakdown of a temperature-separated layer; and a buffer tank equipped with same.
The present invention relates to: a buffer tank provided in an air conditioning system of a data center; and a distributor provided in the buffer tank. A distributor capable of preventing the destruction of a thermocline and a buffer tank having same may be provided.
The present invention relates to a buffer tank installed in an air conditioning system of a data center and a distributor provided in the buffer tank. The buffer tank comprises: a case that has a first space formed therein and an inlet through which fluid flows into the first space from the outside, wherein a first surface, which is one of the surfaces surrounding the first space, is at least partially open; a first wall portion that covers the open first surface and has a plurality of first through-holes; and a second wall portion that is formed, inside the case, in a direction intersecting the first surface, and divides the first space into a first region and a second region. The first region is a region surrounded by the second wall portion, and the second region is a region outside the second wall portion. Accordingly, the present invention provides the effect of preventing the destruction of a thermocline and thus sufficiently satisfying the time required for stratification.
The present invention relates to a buffer tank provided in an air conditioning system of a data center and a distributor provided in the buffer tank. The present invention may provide a distributor capable of preventing destruction of a water temperature separation layer and a buffer tank comprising same.
According to the present invention, provided are a shaped part manufactured by sintering soft magnetic iron-based powder, and a manufacturing method thereof. According to an embodiment of the present invention, provided is a shaped part manufactured by sintering soft magnetic iron-based powder, wherein 90% or more of the soft magnetic iron-based powder has an average particle size of 150 to 400 ㎛, and 10% or less of the soft magnetic iron-based powder has an average particle size of 50 ㎛ or less. The shaped part may be a stator core of a linear motor.
H02K 1/02 - Details of the magnetic circuit characterised by the magnetic material
H02K 1/12 - Stationary parts of the magnetic circuit
H02K 15/02 - Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
H01F 1/147 - Alloys characterised by their composition
H01F 1/22 - Magnets or magnetic bodies characterised by the magnetic materials thereforSelection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys in the form of particles, e.g. powder pressed, sintered, or bound together
B22F 3/16 - Both compacting and sintering in successive or repeated steps
B22F 1/16 - Metallic particles coated with a non-metal
C22C 38/06 - Ferrous alloys, e.g. steel alloys containing aluminium
C22C 38/02 - Ferrous alloys, e.g. steel alloys containing silicon
C22C 38/04 - Ferrous alloys, e.g. steel alloys containing manganese
The present invention provides an apparatus and a method for sealing a coke oven door in order to prevent gas leakage. Provided in one embodiment is the apparatus for sealing a coke oven door, comprising: a sealing material supply unit including a nozzle for discharging a sealing material; a robot which is connected to the sealing material supply unit, and which includes a robot arm for moving the position of the nozzle and a base for supporting the robot arm; a moving unit for moving the robot in the horizontal direction in which a plurality of coke ovens are arranged, and in the vertical direction which is the longitudinal direction of the plurality of coke ovens; and a control unit for controlling the robot arm.
The invention relates to a method for controlling the rapid cooling through contact with a liquid of a section (S) of a strip (1), comprising means for measuring the temperature and the shape of the strip, and a thermal predictive model coupled to a metallurgical predictive model, both of which are coupled to a thermomechanical predictive model, and the real-time adjustment of the control parameters of the line in order to achieve an overall thermomechanical stress amplitude in the strip that is lower than a predefined limit value (Lσ).
According to the present invention, it is possible to provide a steel wire for a spring, the steel wire containing, in wt%, 0.57-0.69% of C, 1.5-2.0% of Si, 0.2-1.0% of Mn, 0.7-1.3% of Cr, 0.05-0.26% of Mo, 0.015% or less of P, and 0.020% or less of S, with the remainder comprising Fe and inevitable impurities, wherein the microstructure of the steel wire includes 9-30% of retained austenite in terms of area fraction and the grain size of the retained austenite is 2.9 µm or less.
C22C 38/34 - Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of silicon
C22C 38/44 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
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
33.
COLD-ROLLED STEEL SHEET AND METHOD OF MANUFACTURING SAME
One aspect of the present invention provides a cold-rolled steel sheet and a method of manufacturing same. A preferred aspect of the present invention provides: an ultra-high strength cold-rolled steel sheet having a tensile strength of at least 1670 MPa and excellent bending properties, hydrogen embrittlement resistance, and corrosion resistance; and a method of manufacturing same.
A steel wire according to an embodiment of the present invention comprises, by wt%: 0.1-0.5% of carbon (C), 0.01-0.6% of silicon (Si), 0.6-1.6% of manganese (Mn), 0.01-1.4% of chromium (Cr), more than 0% and not more than 0.02% of nitrogen (N); at least one selected from the group consisting of 0.01-0.06% of aluminum (Al), 0.005-0.03% of niobium (Nb), 0.001-0.03% of titanium (Ti), or 0.01-0.3% of vanadium (V); and the remainder of iron (Fe) and inevitable impurities. A microstructure of the steel wire includes ferrite and pearlite, and the ferrite has an average grain size of 3 ㎛ or less, a uniform elongation of 3.5% or more, and a yield ratio of 90% or more.
C22C 38/38 - Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of manganese
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 38/24 - Ferrous alloys, e.g. steel alloys containing chromium with vanadium
C21D 8/02 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
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
According to the present invention, there may be provided a copper plated austenitic stainless steel coil comprising: an austenitic stainless steel coil base material; and a copper plating layer provided on the outer surface of the base material, wherein the copper plating layer has an average thickness of 1-100 mu or less, and a ratio of the average thickness of the copper plating layer to the average thickness of the austenitic stainless steel coil base material is 0.2 or less.
The present invention relates to a unit battery shredded material, a battery shredded material including same, and a battery processing method. The unit battery shredded material is for recovering valuable metal from a waste battery, wherein the unit battery shredded material has a layered structure including a separation film in which a cathode or an anode is stacked on at least one surface thereof, and satisfies conditions 1 to 3 in the present specification.
C23C 28/02 - Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of main groups , or by combinations of methods provided for in subclasses and only coatings of metallic material
The present disclosure relates to a hot press formed part having improved hydrogen embrittlement resistance. Specifically, the hot press formed part comprises: a base steel sheet; and a plating layer on at least one surface of the base steel sheet, the hot press formed part including a nanovoid region in which a nano Kirkendall void having an equivalent circular diameter of 5 nm to 100 nm with respect to a thickness-direction cross-section is positioned.
RESEARCH INSTITUTE OF INDUSTRIAL SCIENCE & TECHNOLOGY (Republic of Korea)
Inventor
Jung, Suk-Yong
Jeong, Cheon-Woo
Park, Seoung-Woong
Kim, Joon-Woo
Abstract
An apparatus for producing molybdenum oxyhalide according to one aspect of the present invention comprises a reaction zone to which a halogen-containing gas is supplied, wherein a raw material containing molybdenum oxide is transferred so as to pass through the reaction zone, and molybdenum oxyhalide is produced.
B01J 8/08 - Chemical or physical processes in general, conducted in the presence of fluids and solid particlesApparatus for such processes with moving particles
B01J 8/10 - Chemical or physical processes in general, conducted in the presence of fluids and solid particlesApparatus for such processes with moving particles moved by stirrers or by rotary drums or rotary receptacles
B01J 19/08 - Processes employing the direct application of electric or wave energy, or particle radiationApparatus therefor
B01J 19/20 - Stationary reactors having moving elements inside in the form of helices, e.g. screw reactors
C23C 16/14 - Deposition of only one other metal element
40.
COLD ROLLED STEEL SHEET AND MANUFACTURING METHOD THEREFOR
The present invention relates to a cold rolled steel sheet and a manufacturing method therefor, and more specifically to a high-strength cold rolled steel sheet having an excellent elongation rate and hole expansion ratio, and a manufacturing method therefor.
The present invention relates to a formed member used in parts such as automotive structural members and reinforcements, and to a method for manufacturing same.
The present invention relates to steel suitable for automobile chassis components and, more specifically, to a high yield ratio type hot-rolled steel sheet having ultra-high strength and excellent hole expandability, and a manufacturing method thereof.
One aspect of the present invention is to provide a cold-rolled steel sheet and a method of manufacturing same. A preferred aspect of the present invention is to provide an ultra-high strength cold-rolled steel sheet and a method of manufacturing same, the ultra-high strength cold-rolled steel sheet having a tensile strength of 1470 MPa or higher and also having an excellent shape and excellent phosphate treatability.
One aspect of the present invention provides a coated steel sheet for hot forming, a method of manufacturing same, and a manufacturing method of a hot press formed member. One preferred aspect of the present invention provides a coated steel sheet for hot forming, a method of manufacturing same, and a manufacturing method of a hot press formed member, wherein productivity is excellent and it is possible to reduce manufacturing costs.
An insulation coating composition for an electrical steel sheet according to an embodiment of the present invention comprises 100 parts by weight of a metal phosphate, 30 to 170 parts by weight of silica, 20 to 102 parts by weight of a nitrate, and 20 to 102 parts by weight of a Zr compound.
C23C 22/07 - 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 phosphates
C23C 22/74 - 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 characterised by the process for obtaining burned-in conversion coatings
According to one embodiment of the present invention, an insulation coating composition for an electrical steel sheet comprises: 100 parts by weight of metal phosphate; 33-110 parts by weight of nanosilica having a particle diameter of 1-50 nm; 45-325 parts by weight of microsilica having a particle diameter of 0.5-50 μm; 28-215 parts by weight of nitrate; 10-100 parts by weight of a boron compound; and 8-110 parts by weight of a chromium compound.
C23C 22/07 - 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 phosphates
C23C 22/74 - 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 characterised by the process for obtaining burned-in conversion coatings
An insulating coating composition for an electrical steel sheet according to an embodiment of the present invention comprises 100 parts by weight of a metal phosphate, 30 to 300 parts by weight of silica, 30 to 300 parts by weight of a nitrate, 30 to 300 parts by weight of feldspar, and 30 to 300 parts by weight of talc.
C23C 22/07 - 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 phosphates
C23C 22/74 - 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 characterised by the process for obtaining burned-in conversion coatings
The grain-oriented electrical steel sheet according to one embodiment of the present invention includes, by wt%, 2.0 to 5.0% of Si, 0.005 to 0.04% of Al, and 0.01 to 0.20% of Mn, and the balance Fe and inevitable impurities, wherein the fraction of grains in which the <110> direction forms an angle of 5° or less with respect to ND is 60 area% or greater.
C22C 38/34 - Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of silicon
C21D 8/12 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
49.
NON-ORIENTED ELECTRICAL STEEL SHEET AND METHOD FOR MANUFACTURING SAME
A non-oriented electrical steel sheet according to an embodiment of the present invention contains, in wt%, 1.5-5.0% of Si, 0.1-2.0% of Al, 0.1-2.0% of Mn, 0.001-0.08% of Sn, 0.001-0.08% of Sb, and 0.0002-0.0007% of B, with the remainder comprising Fe and inevitable impurities, wherein, when the content of elements is measured in a surface region, extending 0.3-1 µm from the surface toward the inside of the steel sheet, along the thickness direction of the steel sheet, the weight ratio of the Si content to the Al content at the point where the Al content is greatest is 25 or less, and the difference in the maximum intensity of <111>/ND when the steel sheet before and after stress relief annealing is measured through EBSD is at most 3.
C22C 38/14 - Ferrous alloys, e.g. steel alloys containing titanium or zirconium
C22C 38/42 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
C22C 38/58 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese
C22C 38/52 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with cobalt
50.
HOT-ROLLED STEEL SHEET FOR NON-ORIENTED ELECTRICAL STEEL SHEET, METHOD FOR MANUFACTURING SAME, AND METHOD FOR MANUFACTURING NON-ORIENTED ELECTRICAL STEEL SHEET
A hot-rolled steel sheet for a non-oriented electrical steel sheet according to an embodiment of the present invention contains, in wt%, 2.5-4.5% of Si, 0.1-2.5% of Mn, and 1.0-2.5% of Al, with the remainder comprising Fe and inevitable impurities, wherein the peak of a heat flow curve measured using differential scanning calorimetry (DSC) while heating is in the range of 325°C to 475°C.
C22C 38/58 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese
C22C 38/52 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with cobalt
C22C 38/12 - Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium or niobium
C21D 8/12 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
51.
NON-ORIENTED ELECTRICAL STEEL SHEET AND METHOD FOR MANUFACTURING SAME
A method for manufacturing a non-oriented electrical steel sheet, according to one embodiment of the present invention, comprises the steps of: manufacturing a cold-rolled sheet comprising, by weight %, 0.3% to 4.0% of Si, 0.001% to 2.0% of Al, and 0.03% to 2.0% of Mn, with the remainder being Fe and unavoidable impurities; a first coating step of applying a Si diffusion composition including a Si compound onto the surface of the cold-rolled sheet; a first drying step of drying the Si diffusion composition to form a Si diffusion coating layer; a second coating step of applying the Si diffusion composition onto the dried surface of the steel sheet; a second drying step of drying the Si diffusion composition; and a step of diffusion annealing the cold-rolled sheet.
A non-oriented electrical steel sheet according to one embodiment of the present invention comprises, by wt%, 0.3-7.0% of Si, 0.001-3.0% of Al, 0.03-2.0% of Mn, and the balance of Fe and inevitable impurities, and comprises an oxide layer in the direction from the surface of the steel sheet to the inside of the steel sheet, wherein the thickness of the oxide layer is 7.0 μm or less.
An acid-resistant steel plate, according to one embodiment of the present invention, comprises, by weight %, 0.10% or less (excluding 0%) of C, 0.20% to 0.35% of Cu, 0.23% to 0.40% of Ni, 0.05% to 0.15% of Sb, and 0.07% to 0.22% of Sn, with the remainder being iron (Fe) and other unavoidable impurities.
A cold-rolled steel sheet for cans according to an embodiment of the present invention comprises, by weight%: 0.0005-0.004% of carbon (C); 0.4-0.8% of manganese (Mn); 0.05% or less of silicon (Si); 0.030% or less of phosphorus (P); 0.030% or less of sulfur (S); 0.01-0.07% of aluminum (Al); 0.0005 to 0.004% of nitrogen (N); and the balance of iron (Fe) and other unavoidable impurities, and comprises, by area%, 95% or more of deformed ferrite, wherein the ratio of the average grain diameter in the rolling direction of the deformed ferrite to the average grain diameter in the thickness direction thereof is at least 1.1 and less than 1.5.
An electrical steel sheet for electromagnetic shielding, according to one embodiment of the present invention, has 70 area% or more of crystal grains having a ratio (D2/D1) of a diameter of a circumscribed circle (D1) to a diameter of an inscribed circle (D2) of 0.5 or more among all crystal grains on the surface of the steel sheet, wherein an average crystal grain size in the surface portion from the surface of the steel sheet to less than 1/4 of the steel sheet thickness in the thickness direction is between 80 µm and 500 µm, while the average crystal grain size in the central portion of 1/4 to 1/2 of the steel sheet thickness is 50 µm or less.
C22C 38/02 - Ferrous alloys, e.g. steel alloys containing silicon
C22C 38/04 - Ferrous alloys, e.g. steel alloys containing manganese
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
H01F 1/147 - Alloys characterised by their composition
The present invention relates to a steel sheet and a manufacturing method thereof and, more specifically, to a steel sheet having excellent resistance to the initiation of ultra-low temperature brittle cracking and a manufacturing method thereof.
The present invention relates to a wire rod and a steel wire, both having excellent hydrogen embrittlement resistance, and a manufacturing method therefor and, more specifically, to a wire rod having excellent hydrogen embrittlement resistance and comprising, by weight%, C: 0.20-0.40%, Si: 0.20-0.50%, Mn: 0.50-1.00%, Ti: 0.050-0.100%, S: 0.030-0.080%, and the balance of Fe and inevitable impurities, wherein an atomic ratio (Ti/S) of Ti and S satisfies the following formula (1), and when a diameter of the wire rod is D, a microstructure in a region of 1/2D to 3/2D of a cross section of the wire rod includes 20 to 30% by area fraction of ferrite and the balance of pearlite. Formula (1): 0.5 ≤ (Ti weight)/(Ti mass) / (S weight)/(S mass) ≤ 1.8
C22C 38/04 - Ferrous alloys, e.g. steel alloys containing manganese
C22C 38/02 - Ferrous alloys, e.g. steel alloys containing silicon
C22C 38/14 - Ferrous alloys, e.g. steel alloys containing titanium or zirconium
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
C21D 1/667 - Quenching devices for spray quenching
A wire according to an embodiment of the present invention comprises, based on wt%, 0.60-1.00% of C, 0.1-0.4 of Si, and 0.2-0.6% of Mn, and the remainder of Fe and other impurities, in which a microstructure comprises, by area fraction, 98% or more of pearlite and 2% or less of proeutectoid cementite, and an average lamellar spacing may be 0.230-0.350 ㎛.
Disclosed are a steel wire rod, a steel wire, and methods of manufacturing same. The steel wire rod according to the present invention contains: 0.60-1.00% of C, 0.1-0.4% of Si, 0.2-0.6% of Mn, 0.3% or less (including 0%) of Cr, and the balance being Fe and other inevitable impurities, with a microstructure including pearlite, and has an average lamellar spacing L (unit: ㎛) controlled to fall within a specific range with respect to the carbon equivalent (Ceq).
C22C 38/18 - Ferrous alloys, e.g. steel alloys containing chromium
C22C 38/02 - Ferrous alloys, e.g. steel alloys containing silicon
C22C 38/04 - Ferrous alloys, e.g. steel alloys containing manganese
C21D 8/06 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires
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
B21C 47/04 - Winding-up or coiling on or in reels or drums, without using a moving guide
60.
COLD-ROLLED STEEL SHEET, ZN-PLATED STEEL SHEET AND METHODS FOR MANUFACTURING SAME
The present invention relates to steels that are suitable as automobile exterior materials and, more specifically, to a cold-rolled steel sheet, a ZN-plated steel sheet obtained by galvanizing the cold-rolled steel sheet, and methods for manufacturing same.
The present invention relates to a material used for vehicle interior panels, reinforcing materials, and the like and, more specifically, to a high-strength steel sheet having excellent material uniformity and a manufacturing method thereof.
One aspect of the present invention provides a plated steel sheet. The plated steel sheet comprises: a base steel sheet; and a plating layer formed on at least one surface of the base steel sheet, wherein the base steel sheet contains, in wt%, 0.05-0.25% of carbon (C), 0.001-0.6% of silicon (Si), 1.2-3.0% of manganese (Mn), 0.001-1.0% of aluminum (Al), 0.0001-0.05% of phosphorus (P), 0.0001-0.05% of sulfur (S), and 0.0001-0.02% of nitrogen (N), with the remainder comprising Fe and inevitable impurities, the microstructure of the base steel sheet includes 65-90 area% of a first phase containing bainitic ferrite, the microstructure of the base steel sheet includes 10-35 area% of a second phase containing a tempered martensite-austenite composite phase (TMA phase) and at least one among tempered low-temperature bainite and tempered lath martensite, and the area fraction of the tempered martensite-austenite composite phase relative to the total area fraction of the microstructure may be less than 3 area%.
The present invention relates to a method for manufacturing a thick steel plate having a heavy unit weight, wherein the thick steel plate has a unit weight of 30 tons or more and can be formed into a shape forming at least part of a desired structure. The method comprises the steps of: s1) using at least two thick steel plates that each have a unit weight of 25 tons or less and a thickness (t0) of 60 mm or more and have a grooved end, and arranging the steel plates so that the grooved ends face each other, thereby forming a joint having a groove; s2) performing tack welding to fix the joint; s3) performing first arc welding along the groove; s4) forming a back-surface groove, along the joint, on a back surface opposite a front surface, which is the surface on which the first arc welding was performed; and s5) performing secondary arc welding along the back-surface groove.
The present invention relates to: steel that can be used for a wind power generator having a monopile or jacket structure; and a method for manufacturing same.
According to exemplary embodiments of the present invention, provided is an ultra-high strength steel plate having improved formability. According to other exemplary embodiments of the present invention, provided is a method for manufacturing the ultra-high strength steel plate having improved formability.
Disclosed are hot-rolled steel sheet and hot-rolled plated steel sheet with high-strength, and a manufacturing method thereof, the hot-rolled steel sheet and hot-rolled plated steel sheet being high strength to be suitable as material for high-strength structural supports, and allowing reduction in the rolling load of hot-rolling finish. A hot-rolled steel sheet according to the present invention contains, in wt%, 0.03-0.1% of C, 0.1% or less of Si, 0.8-1.4% of Mn, 0.03-0.08% of Ti, 0.02% or less of P, 0.02% or less of S, and 0.01% or less of N, with the remainder comprising Fe and inevitable impurities, and satisfies relational expression 1. Relational expression 1: 3 ⅹ ([Mn] - 1.2)2+ 1200 ⅹ ([Ti] - 0.06)2+ 0.0004 ⅹ (coiling temperature (°C) - 630)2 ≤ 1.0 (In relational expression 1, [ ] indicates the wt% of each element.)
The present invention relates to a cold-rolled steel sheet and a manufacturing method therefor and, more specifically, to a cold-rolled steel sheet and a manufacturing method therefor, wherein the cold-rolled steel sheet is suitable for use as a material for components requiring highly complex forming, such as outer panels, e.g., vehicle side outers and the like. A preferred aspect of the present invention is to provide a cold-rolled steel sheet having excellent formability and excellent material anisotropy so as to be uniformly deformed in all directions, and a manufacturing method therefor.
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
C23C 2/06 - Zinc or cadmium or alloys based thereon
68.
HOT-PRESS-FORMED MEMBER, HOT-PRESS-FORMED PARTS, AND METHODS FOR MANUFACTURING SAME, AND FORMING DEVICE, FORMING METHOD, BRACKET FOR BATTERY CASE, AND BATTERY PACK MODULE
The purpose of the present invention is to provide a hot-press-formed member having excellent coating-corrosion resistance and a method for manufacturing same, the hot-press-formed member comprising a base steel and an aluminum-based alloy plated layer, wherein the base steel comprises, by wt%, 0.015-0.10% of Sb, and the aluminum-based alloy plated layer comprises an intermediate layer and an outermost layer positioned on the upper portion of the intermediate layer.
A hot rolled steel sheet, and a method for manufacturing same are provided. The hot rolled steel sheet of the present invention comprises, by wt%, 0.02-0.09% of C, 1.0% or less of Si, 0.3-2.0% of Mn, 0.4-2.0% of Cr, 1.0% or less of Cu, 1.0% or less of Ni, 0.1% or less of Al, 0.02-0.1% of Nb, 0.01-0.1% of Ti, 0.03% or less of P, 0.02% or less of S, 0.015% or less of N and the balance of Fe and inevitable impurities, and satisfies Nb+Ti≤0.12, wherein the microstructure of the steel sheet comprises ferrite or bainite as a main phase and contains the balance (less than 20 area%) of other structures, the weathering index defined by the relation is 6.0 or more, the yield strength, at 30° with respect to the rolling direction, of the steel sheet is 450 MPa or more, and the -5°C impact absorption energy, at 120° with respect to the rolling direction, of the steel sheet, is 47 J or more.
One aspect of the present invention is to provide a cold rolled steel sheet and a method for manufacturing same. Another aspect of the present invention is to provide an ultra high strength cold rolled steel sheet having excellent hydrogen embrittlement resistance, and a method for manufacturing same.
The objective of the present invention is to provide a cold-rolled steel sheet and a method for manufacturing same, the cold-rolled steel sheet having, when a steel sheet for a vehicle is manufactured by recycling iron scrap, high strength and high formability even if containing residual elements.
Provided are a hot-rolled steel sheet and a method for manufacturing same. The present invention provides a hot-rolled steel sheet and a method for manufacturing same, the hot-rolled steel sheet satisfying a core section hardness of 40-50 HrC and having excellent bendability (the bending radius at which surface ridges do not form during 90° bending/steel sheet thickness ratio is low).
The present invention relates to a hot-rolled steel sheet used in frames, structures, etc. and, to a hot-rolled steel sheet that ensures high hardness, strength, and excellent processing characteristics, and a method for manufacturing same.
The present invention relates to a cold rolled steel sheet and a manufacturing method therefor and, more particularly, to a high-strength cold rolled steel sheet having excellent hardness and ductility, and a manufacturing method therefor.
Disclosed are an electrode material for a self-baking electrode and a manufacturing method thereof. The method for manufacturing an electrode material for a self-baking electrode according to an embodiment of the present invention, which is a manufacturing method for an electrode material for forming a self-baking electrode, includes: a preparation step of preparing an aggregate mainly composed of carbon; an antioxidant treatment step of coating the surface of the prepared aggregate with an antioxidant; a mixing step of mixing the antioxidant-treated aggregate with binder pitch; and a molding step of molding the mixture of the carbon aggregate and binder pitch into a predetermined shape.
C04B 35/52 - Shaped ceramic products characterised by their compositionCeramic compositionsProcessing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxides based on carbon, e.g. graphite
C04B 35/622 - Forming processesProcessing powders of inorganic compounds preparatory to the manufacturing of ceramic products
Disclosed are a camber adjustment device of a prefabricated truss bridge and a prefabricated truss bridge having same. According to one aspect of the present invention, a camber adjustment device of a prefabricated truss bridge formed by assembling truss panels, including upper members, lower members, vertical members, and diagonal members, in one direction may be provided, the camber adjustment device including connection members that are provided at both ends of the upper members and lower members and connect the upper members and lower members to the neighboring upper members and lower members, wherein the connection members can be adjusted in length from both ends of the upper members and lower members by a length adjustment means.
Disclosed are a height-variable truss panel and a prefabricated truss bridge having same. According to one aspect of the present invention, provided is a height-variable truss panel comprising: an upper member that has a certain length and includes lower connectors formed at regular intervals on a lower portion; a lower member that has a certain length and includes upper connectors formed at regular intervals on an upper portion; and a plurality of intermediate members which are provided between the upper member and the lower member and connected and fixed at both ends to the lower connectors of the upper member and the upper connectors of the lower member, wherein the intermediate members can be varied in length to adjust the distance between the upper member and the lower member.
COMPOSITION FOR SURFACE-TREATING PLATED STEEL SHEET FOR HOT-PRESS FORMING, AL-BASED PLATED STEEL SHEET SURFACE-TREATED USING SAME, METHOD FOR MANUFACTURING SAME, AND HOT-PRESS-FORMED MEMBER
The present invention relates to a plated steel sheet for hot-press forming, suitable for automobile materials and, more specifically, to a composition for surface-treating the plated steel sheet for hot-press forming, and a plated steel sheet that is surface-treated using the composition, and a method for manufacturing same. In addition, provided is a hot-press-formed member obtained using the surface-treated plated steel sheet.
C09D 133/00 - Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereofCoating compositions based on derivatives of such polymers
B05D 7/00 - 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
Disclosed is a hot-rolled steel sheet for a vacuum train tube, which is excellent in terms of yield strength, weldability, low-temperature toughness of a welded part, and a vibration damping ratio, while having no hot cracks. The hot-rolled steel sheet according to the present invention comprises, in weight%, C: 0.06% or less (more than 0%), Si: 0.5-1.5%, Mn: 1.2-2.2%, Cu: 0.5-1.5%, Ni: 0.25% or more, Ti+Nb+V: 0.02% or less (including 0%), and the balance being Fe and inevitable impurities.
The present invention relates to a high-strength austenitic stainless steel having excellent low-temperature toughness and a manufacturing method therefor and, more specifically, to a high-strength austenitic stainless steel and a manufacturing method therefor, the high-strength austenitic stainless steel comprising, in weight%, C: 0% (exclusive) to 0.10% (inclusive), Si: 0% (exclusive) to 1.5% (inclusive), Cr: 17.0% to 23.0%, Ni: 5.5% to 12.0%, Mn: 0.5% to 8.0%, N: 0.10% to 0.30%, Cu: 0% (exclusive) to 1.0% (inclusive), and the balance being Fe and other inevitable impurities, with a content of precipitate of less than 0.001 wt%, and has a Ni equivalent value of 27 or more as defined by equation (1). Equation (1): Ni equivalent = Ni+0.65Cr+0.98Mo+1.05Mn+0.35Si+12.6C+33.6N
The present invention relates to a method for manufacturing a high-strength stainless steel having excellent formability. More specifically, the present invention relates to: a stainless steel containing, in wt%, 0.01-0.10% of C, 0.01-0.10% of N, 0.01-1.00% of Si, 0.01-3.00% of Mn, 10.0-20.0% of Cr, and 0.001-1.000% of Al, with the remainder comprising Fe and inevitable impurities, wherein the microstructure is composed of a dual phase of ferrite and martensite, the room temperature yield strength is at least 350 MPa, the room temperature tensile strength is at least 500 MPa, and the R-bar value based on Equation (1) is at least 1.0; and a method for manufacturing the stainless steel. Equation (1): R-bar = (R0 + 2×R45 + R90)/4 (where, R0 represents the R value in a direction parallel to the rolling direction, R45 represents the R value in a direction at a 45-degree angle to the rolling direction, and R90 represents the R value in a direction at a 90-degree angle to the rolling direction)
One aspect of the present invention is to provide hot-dip Zn-Mg-Al-based coated steel sheet and a manufacturing method thereof. A preferred aspect of the present invention is to provide a hot-dip Zn-Mg-Al-based coated steel sheet having excellent plating adhesiveness, and a manufacturing method thereof.
A non-oriented electrical steel sheet according to an embodiment of the present invention contains, in wt%, 2.6-4.5% of Si, 0.0005-2.5% of Al, 0.05-2.5% of Mn, 0.0051-0.0100% of S, and 0.0002-0.0100% of Ca, with the remainder comprising Fe and inevitable impurities.
C22C 38/58 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese
C21D 8/12 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
84.
NON-ORIENTED ELECTRICAL STEEL SHEET AND METHOD FOR MANUFACTURING SAME
A non-oriented electrical steel sheet according to an embodiment of the present invention contains, in wt%, 1.5-5.0% of Si, 0.1-2.0% of Al, and 0.1-2.0% of Mn, with the remainder comprising Fe and inevitable impurities, and satisfies Expression 1 below. [Expression 1] V{001}<001>/V{011}<001> ≤ 0.65 (In Expression 1, V{001}<001> represents the fraction of crystal grains having an orientation within 15° of {001}<001>, and V{011}<001> represents the fraction of crystal grains having an orientation within 15° of {011}<001>.)
C22C 38/14 - Ferrous alloys, e.g. steel alloys containing titanium or zirconium
C22C 38/42 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
C22C 38/58 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese
C22C 38/52 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with cobalt
C21D 8/12 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
85.
NICKEL-PLATED STEEL SHEET FOR CANS AND MANUFACTURING METHOD THEREOF
A Ni-plated steel sheet for cans according to an embodiment of the present invention comprises: a base steel sheet; a Ni plating layer disposed on one surface or both surfaces of the base steel sheet; and an Fe-Ni alloy layer disposed between the base steel sheet and the Ni plating layer, wherein the base steel sheet contains, in wt%, 0.02-0.07% of C, 0.1-0.4% of Mn, 0.01-0.06% of Al, and 0.02-0.06% of Ti, with the remainder comprising Fe and inevitable impurities, the ASTM grain size number is at least 11.3, the tensile strength is at least 420 MPa, the elongation is at least 20%, the in-plane anisotropy Δr is at most 0.4, and the thickness of the Fe-Ni alloy layer is 0.5-2.5 µm.
A non-oriented electrical steel sheet according to an embodiment of the present invention contains, in wt%, 1.5-5.0% of Si, 0.1-2.0% of Al, 0.1-2.0% of Mn, 0.001-0.08% of Sn, 0.001-0.08% of Sb, and 0.0002-0.0007% of B, with the remainder comprising Fe and inevitable impurities, wherein, when the content of elements is measured in a surface region, extending 0.3-1 µm from the surface toward the inside of the steel sheet, along the thickness direction of the steel sheet, the weight ratio of the maximum Si content to the maximum Al content is 25 or less.
A non-oriented electrical steel sheet according to an embodiment of the present invention comprises, in weight %: 1.5-5.0% of Si; 0.1-2.0% of Al; and 0.1-2.0% of Mn, the remainder being Fe and inevitable impurities, and has a {001}<100> orientation strength, expressed as an orientation distribution function (ODF), of 3.0 or more, and a {011}<100> orientation strength that is greater than the {001}<100> orientation strength.
C22C 38/58 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese
C22C 38/52 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with cobalt
C22C 38/12 - Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium or niobium
C21D 8/12 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
88.
COOLING COMPOSITION FOR ZINC ALLOY PLATED STEEL SHEET, METHOD FOR MANUFACTURING ZINC ALLOY PLATED STEEL SHEET USING SAME, AND ZINC ALLOY PLATED STEEL SHEET PRODUCED BY SAME
One aspect of the present invention provides a method for manufacturing a zinc alloy plated steel sheet. The method comprises the steps of: preparing a base steel sheet; plating the base steel sheet by dipping same in a Zn-based plating bath comprising Al and Mg; adjusting the plating adhesion amount of the base steel sheet; and spraying droplets of a cooling composition onto the steel sheet having the plating adhesion amount adjusted, thereby cooling the steel sheet, wherein the cooling composition may comprise 0.1 to 10.0 wt% of urea and the balance of water.
The present invention relates to a steel material for a polymer fuel cell separator and a method for manufacturing same. The steel material for a polymer fuel cell separator comprises: a steel material from which an oxide film is removed; and a carbon coating layer formed on the surface of the steel material, wherein the carbon coating layer contains 90 wt % or more of graphite having a SP2 bond, and has excellent conductivity and oxidation resistance.
The present invention relates to a cold-rolled steel sheet and a method for manufacturing same and, more specifically, to a cold-rolled steel sheet having excellent surface quality and a method for manufacturing same.
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 38/06 - Ferrous alloys, e.g. steel alloys containing aluminium
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 38/22 - Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
C23C 22/07 - 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 phosphates
C21D 8/04 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing
C23C 2/04 - Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shapeApparatus therefor characterised by the coating material
91.
COLD-ROLLED STEEL SHEET AND METHOD FOR MANUFACTURING SAME
The present invention relates to a cold-rolled steel sheet and a method for manufacturing same and, more specifically, to a high-strength cold-rolled steel sheet having excellent moldability and a method for manufacturing same.
The present invention relates to a cold-rolled steel sheet and a manufacturing method thereof and, more specifically, to an ultra-high strength cold-rolled steel sheet having excellent bendability and hydrogen embrittlement resistance, and a manufacturing method thereof.
The present invention relates to a steel sheet that is suitable for various uses including in automobile parts and, more specifically, to a steel sheet and a manufacturing method thereof.
The present invention relates to steel sheets suitable for a variety of uses including automobile parts, more specifically to cold-rolled steel sheets and plated steel sheets containing residual elements and having good hole expansion ratio and plating adhesiveness, and to a manufacturing method thereof.
One aspect of the present invention is that a cold rolled steel sheet and a method for manufacturing same are to be provided. One advantageous aspect of the present invention is that an ultra-high strength cold rolled steel sheet and a method for manufacturing same are to be provided, the cold rolled steel sheet having a tensile strength of 1470 MPa or higher and excellent bending properties, spot weldability, and corrosion resistance while having excellent formability.
A wire rod according to an embodiment of the present invention comprises, by wt%, 0.94-1.04% of C, 0.9-1.5% of Si, 0.2-0.8% of Mn, 0.2-0.8% of Cr, 0.020-0.105% of Al, 0.0021-0.0205% of N, 2.00-11.00% of Al/N, and the remainder of Fe and other inevitable impurities. A method for manufacturing a wire rod, according to another embodiment of the present invention, comprises the steps of: preparing a billet comprising, by wt%, 0.94-1.04% of C, 0.9-1.5% of Si, 0.2-0.8% of Mn, 0.2-0.8% of Cr, 0.021-0.102% of Al, 0.0021-0.0205% of N, 2.00-11.00% of Al/N, and the remainder of Fe and other inevitable impurities; reheating and hot-rolling the billet; coiling at Acm-80°C to 760°C; cooling from the coiling temperature to 650-620°C, which is the pearlite transformation entry temperature, at 10-20°C/s; and setting and maintaining the conveyor speed at 0.30 m/s or less for 200 seconds or longer for the interval from the cooling temperature to 600-560°C.
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
97.
VIBRATION-DAMPING STEEL SHEET AND MANUFACTURING METHOD THEREFOR
The present invention relates to a vibration-damping steel sheet having excellent vibration-damping performance even at room temperature and a method for manufacturing a vibration-damping steel sheet having improved productivity.
B32B 15/08 - Layered products essentially comprising metal comprising metal as the main or only constituent of a layer, next to another layer of a specific substance of synthetic resin
B32B 38/00 - Ancillary operations in connection with laminating processes
The present invention relates to a steel sheet suitable as a material for a vehicle structural member and the like, and, more specifically, to a high-strength composite structure steel sheet with a tensile strength of 780 MPa or higher, and a method for manufacturing same.
5㎛MAXMAX5㎛5㎛) is 5.0 or less, and the number of Al aggregates having a particle diameter of 500 nm or more in a region from the surface of the steel sheet to 5 μm inward is 5 or less per 100 μm length of the steel sheet.
MAX5µmMAX5µm5µm, which is the Al content at the point 5 µm inside the steel sheet from the surface of the steel sheet, is 4.0 or less, and the number of ridges having a width of at least 2 mm and a length of at least 10 mm is 5 or less per 300 mm x 300 mm area.
C22C 38/58 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese
C22C 38/52 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with cobalt
C22C 38/12 - Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium or niobium
C21D 8/12 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
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