The present disclosure provides a method of manufacturing hot-stamped parts, the method including: a heating operation of heating a blank; a transferring operation of transferring the heated blank to a press die including a punch; and a forming and piercing operation of hot-forming the transferred blank into a shape of a hot-stamped part and hot-piercing the transferred blank to form a pierced portion in the hot-stamped part.
Provided is a snout control system comprising: a snout apparatus in which one end of a steel sheet is immersed in a plating bath, containing a hot-dip galvanizing solution for plating the steel sheet, to introduce the steel sheet into the plating bath during the production process of a hot-dip galvanized steel sheet; a first sensor which is formed on a portion of the plating bath and can measure the first water level of the molten steel of the hot-dip galvanizing solution; and a processor which controls the snout apparatus and the first sensor.
An embodiment of the present disclosure discloses an aluminum-based plating blank including a first plated steel plate, a second plated steel plate connected to the first plated steel plate, and a joint located between the first plated steel plate and the second plated steel plate and connecting the first plated steel plate to the second plated steel plate.
Provided is a high-strength cold-rolled steel plate. According to an embodiment of the present disclosure, the high-strength cold-rolled steel plate includes: in % by weight, carbon (C): 0.1% to 0.3%, silicon (Si): 1.0% to 2.0%, manganese (Mn): 1.5% to 3.0%, aluminum (Al): 0.01% to 0.05% or less, phosphorus (P): 0.02% or less, sulfur(S): 0.005% or less, a remainder being iron (Fe) and other inevitable impurities. According to an embodiment of the present disclosure, the high-strength cold-rolled steel plate has a microstructure including, by area ratio, 25 to 35% ferrite, 10 to 18% retained austenite, 5% or less M-A (martensite-austenite composite phase) and the remainder being martensite.
The present disclosure provides a hot-stamped component having a pierced portion formed therein, the hot-stamped component including: a base material; an interdiffusion layer arranged on the base material; and a plating layer arranged on the interdiffusion layer, wherein the hot-stamped component includes a shearing-processed surface formed at an edge of the pierced portion, the shearing-processed surface includes a rollover surface, a shear surface, and a fracture surface, and a thickness th1 of the fracture surface and a thickness th2 of the shearing-processed surface satisfy Equation 1 (th1/th2≤0.6).
Provided is an ultra-high-strength cold-rolled steel plate with corrosion resistance, including: in % by weight, carbon (C): 0.1% to 0.5%, silicon (Si): 0.01% to 2.0%, manganese (Mn): 0.1% to 5.0%, aluminum (Al): 0.01% to 2.0%, chromium (Cr): greater than 0% and 3.0% or less, molybdenum (Mo): greater than 0% and 1.0% or less, nickel (Ni): 0.02% to 3.0%, copper (Cu): 0.02% to 3.0%, titanium (Ti): 0.01% to 0.2%, niobium (Nb): 0.01% to 0.1%, vanadium (V): 0.01% to 1.0%, boron (B): 0.001% to 0.005%, phosphorus (P): greater than 0% and 0.02% or less, sulfur (S): greater than 0% and 0.01% or less, and the remainder containing iron (Fe) and other inevitable impurities, wherein a ratio ([Cu]/[Ni]) of the content of the copper (Cu) to the content of the nickel (Ni) ranges from 0.54 to 5.7, and the ultra-high-strength cold-rolled steel plate satisfies: yield strength (YS): 1000 MPa or more, tensile strength (TS): 1100 MPa or more, elongation index (EL): 3% or more, and hydrogen embrittlement test method-based non-fracture time: 100 hours or more.
Provided is an ultra-high-strength cold-rolled steel sheet with a balanced improvement in strength and ductility, and a method of manufacturing the same. According to an embodiment of the present disclosure, the ultra-high-strength cold-rolled steel sheet includes carbon (C): 0.1 wt % to 0.3 wt %, silicon (Si): 1.0 wt % to 2.0 wt %, manganese (Mn): 1.5 wt % to 3.0 wt %, aluminum (Al): more than 0 wt % and up to 0.05 wt %, a combination of one or more selected from titanium (Ti), niobium (Nb), and vanadium (V): more than 0 wt % and up to 0.05 wt %, phosphorus (P): more than 0 wt % and up to 0.02 wt %, sulfur (S): more than 0 wt % and up to 0.005 wt %, nitrogen (N): more than 0 wt % and up to 0.006 wt %, and a balance of iron (Fe) and other unavoidable impurities, wherein the ultra-high-strength cold-rolled steel sheet meets a yield strength (YS): 850 MPa or more, a tensile strength (TS): 1180 MPa or more, an elongation (EL): 14% or more, a hole expansion ratio (HER): 25% or more, and TS×EL×HER/1000: 500 or more.
Provided is a high-strength and high-formability steel sheet and a method of manufacturing the same. The high-strength and high-formability steel sheet according to an embodiment of the present disclosure includes carbon (C): 0.1 wt % to 0.3 wt %, silicon (Si): 1.0 wt % to 2.0 wt %, manganese (Mn): 1.5 wt % to 3.0 wt %, aluminum (Al): more than 0 wt % and up to 0.05 wt %, phosphorus (P): more than 0 wt % and up to 0.02 wt %, sulfur (S): more than 0 wt % and up to 0.005 wt %, nitrogen (N): more than 0 wt % and up to 0.006 wt %, and a balance of iron (Fe) and other unavoidable impurities, wherein contents of C, Mn, and Si meet a relationship of XC, wt %+0.066×XSi, wt %+0.043×XMn, wt %≤0.4, and wherein the high-strength and high-formability steel sheet meets a yield strength (YS): 500 MPa or more, a tensile strength (TS): 980 MPa or more, a total elongation (T.EL): 23% or more, and a product of tensile strength and elongation: 23,000 MPa % or more.
The present disclosure provides a highly corrosion-resistant plated steel having excellent corrosion resistance and a method of manufacturing the same. According to an embodiment of the present invention, the method of manufacturing the highly corrosion-resistant plated steel includes immersing a base steel in a hot-dip alloy-plating bath including 6% to 18% by weight of aluminum (Al), 3% to 6% by weight of magnesium (Mg), the remainder being zinc (Zn) and other inevitable impurities; taking the immersed base steel out of the hot-dip alloy-plating bath to form a hot-dip alloy-plated layer on the base steel; and cooling the base steel having the hot-dip alloy-plated layer thereon, wherein the content ratio of aluminum:magnesium in the hot-dip alloy-plating bath is 2:1 to 6:1.
The present disclosure relates to a hot stamping component and a method of manufacturing the same. According to the preferred present hot press component and the method of manufacturing the same, a hot press component with hydrogen embrittlement suppressed and having ultra-high strength can be obtained.
Provided are a non-heat-treated steel wire rod with excellent cold forgeability and a method of manufacturing the same, the non-heat-treated steel wire rod including carbon: 0.20 to 0.40 wt %, silicon: 0.10 to 0.30 wt %, manganese: 1.30 to 1.60 wt %, phosphorus: more than 0 wt % and up to 0.05 wt %, sulfur: more than 0 wt % and up to 0.05 wt %, chromium: 0.02 to 0.30 wt %, nickel: 0.02 to 0.30 wt %, molybdenum: 0.02 to 0.30 wt %, vanadium: 0.01 to 0.15 wt %, niobium: 0.01 to 0.05 wt %, aluminum: 0.005 to 0.060 wt %, titanium: 0.005 to 0.020 wt %, copper: 0.01 to 0.30 wt %, boron: 0.0001 to 0.0020 wt %, nitrogen: 0.005 to 0.015 wt %, and a balance of iron and other unavoidable impurities, wherein a sum of Nb and V is 0.02 to 0.2 wt %, and wherein the non-heat-treated steel wire rod satisfies a tensile strength of 900 MPa or more.
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
The present application relates to a method for manufacturing a metal separator and a metal separator manufactured thereby. According to a method for manufacturing a metal separator and a metal separator manufactured thereby of the present application, a process time can be shortened, and electrical conductivity and corrosion resistance can be improved at the same time.
C23C 18/12 - Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coatingContact plating by thermal decomposition characterised by the deposition of inorganic material other than metallic material
The present invention relates to a hand scarfing control device and a method thereof, the hand scarfing control device comprising: a camera that includes a plurality of cameras and captures images of the surface of a slab to generate image data; a processor for analyzing the image data to detect defects in the slab, setting a scarfing area corresponding to the form of the defects, and setting a plurality of layers for a scarfing operation; and a scarfing robot for performing scarfing layer by layer on the basis of the scarfing area, wherein the hand scarfing control device can effectively remove the defects in the slab and improve the quality of the slab.
B22D 11/06 - Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
B22D 11/12 - Accessories for subsequent treating or working cast stock in situ
B22D 11/16 - Controlling or regulating processes or operations
B23K 7/06 - Machines, apparatus, or equipment specially designed for scarfing or desurfacing
Wholesale store services featuring finishing preparations for use in the manufacture of steel; sales agency services for finishing preparations for use in the manufacture of steel; wholesale store services featuring hot-rolled steel sheets; retail store services featuring hot-rolled steel sheets; wholesale store services featuring cold-rolled steel sheets; retail store services featuring cold-rolled steel sheets; wholesale store services featuring galvanized steel sheets; retail store services featuring galvanized steel sheets; wholesale store services featuring steel plates; retail store services featuring steel plates; wholesale store services featuring structural steel; retail store services featuring structural steel; wholesale store services featuring mould steel; retail store services featuring mould steel; wholesale store services featuring special steel bars; retail store services featuring special steel bars; wholesale store services featuring slabs of metal for building; retail store services featuring slabs of metal for building; wholesale store services featuring rebars; retail store services featuring rebars; wholesale store services featuring rebars for construction; retail store services featuring rebars for construction; wholesale store services featuring construction materials of metal; retail store services featuring construction materials of metal; import-export agency services; promoting the goods and services by means of operating an on-line comprehensive shopping mall; business intermediary services relating to mail order by telecommunications
40 - Treatment of materials; recycling, air and water treatment,
Goods & Services
Electro and metal coating, metal treating and casting, hardening of metal and metal products; treatment and transformation of metal; welding services; custom steel rolling and fabrication to the order and specification of others; custom manufacture of metal hardware; metalworking; processing of light metals
17.
HOT-STAMPED PART AND METHOD FOR MANUFACTURING SAME
A method includes: forming a blank by cutting a plated steel sheet having a plating layer formed on at least one surface of a base material; and heating the blank in a heating furnace, wherein the heating of the blank includes: a multistage heating operation of heating the blank in stages; and a soaking operation of soaking the blank, in a temperature of Ac1 to 910° C., and a temperature an in the soaking operation and a total heating time bn in the heating of the blank satisfy
A method includes: forming a blank by cutting a plated steel sheet having a plating layer formed on at least one surface of a base material; and heating the blank in a heating furnace, wherein the heating of the blank includes: a multistage heating operation of heating the blank in stages; and a soaking operation of soaking the blank, in a temperature of Ac1 to 910° C., and a temperature an in the soaking operation and a total heating time bn in the heating of the blank satisfy
6
2
≤
91.81
+
K
-
0
.
0
22
×
a
n
-
0
.23
×
b
n
A method includes: forming a blank by cutting a plated steel sheet having a plating layer formed on at least one surface of a base material; and heating the blank in a heating furnace, wherein the heating of the blank includes: a multistage heating operation of heating the blank in stages; and a soaking operation of soaking the blank, in a temperature of Ac1 to 910° C., and a temperature an in the soaking operation and a total heating time bn in the heating of the blank satisfy
6
2
≤
91.81
+
K
-
0
.
0
22
×
a
n
-
0
.23
×
b
n
(K: a material correction coefficient.)
A method of producing a hot-rolled steel sheet according to an embodiment of the present invention includes producing molten metal using raw materials including pig iron produced in a blast furnace, direct reduced iron, and steel scrap, producing a semi-finished product, and producing a hot-rolled steel sheet.
A method of producing a hot-rolled steel sheet according to an embodiment of the present invention includes producing molten metal using raw materials including pig iron produced in a blast furnace, direct reduced iron, and steel scrap, producing a semi-finished product, and producing a hot-rolled steel sheet.
Provided is a plated steel sheet including a cold-rolled steel sheet; and a plating layer coated on the cold-rolled steel sheet and consisting of aluminum (Al): 0.5 wt % to 3 wt %, magnesium (Mg): 1 wt % to 2 wt %, silicon (Si): 0.005 wt % to 0.1 wt %, titanium (Ti): 0.01 wt % to 0.1 wt %, and a balance of zinc (Zn) and other unavoidable impurities, wherein the plating layer has a Ti-to-Si content ratio of 1.0 or more, and wherein the plating layer includes an intermetallic compound containing Ti.
The present application relates to a metal separator and a manufacturing method therefor. According to the present application, the metal separator having excellent electrical conductivity and corrosion resistance and the manufacturing method therefor can be provided.
H01M 8/0228 - Composites in the form of layered or coated products
C23C 22/34 - 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 fluorides or complex fluorides
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
C23C 22/78 - Pretreatment of the material to be coated
A roof side rail is positioned on a roof side of a vehicle along a longitudinal direction of the vehicle. The roof side rail includes a roof side outer panel formed with a cross-section projecting outward relative to the vehicle and a roof side inner panel formed with a cross-section projecting inward relative to the vehicle. Upper and lower portions of the roof side inner panel are respectively assembled with upper and lower portions of the roof side outer panel. A roof panel is removably mounted on the vehicle. When the roof panel is installed, the roof side outer panel supports the roof panel.
B60J 10/90 - Sealing arrangements specially adapted for non-fixed roofs, e.g. foldable roofs or removable hard-tops
B60J 7/16 - Non-fixed roofsRoofs with movable panels of non-sliding type, i.e. movable or removable roofs or panels, e.g. let-down tops or roofs capable of being easily detached or of assuming a collapsed or inoperative position non-foldable
B60R 21/214 - Arrangements for storing inflatable members in their non-use or deflated conditionArrangement or mounting of air bag modules or components in roof panels
23.
HOT STAMPING COMPONENT AND METHOD OF MANUFACTURING THE SAME
The present disclosure provides a method of manufacturing a hot stamping component, the method includes inserting a blank into a heating furnace, heating the blank, and transferring the heated blank from the heating furnace to a mold, wherein an air cooling time of the blank in the transferring of the blank satisfies Equation 1.
Provided are a material for hot stamping, wherein the material includes: a steel sheet including carbon (C) in an amount of 0.19 wt % to 0.25 wt %, silicon (Si) in an amount of 0.1 wt % to 0.6 wt %, manganese (Mn) in an amount of 0.8 wt % to 1.6 wt %, phosphorus (P) in an amount less than or equal to 0.03 wt %, sulfur (S) in an amount less than or equal to 0.015 wt %, chromium (Cr) in an amount of 0.1 wt % to 0.6 wt %, boron (B) in an amount of 0.001 wt % to 0.005 wt %, an additive in an amount less than or equal to 0.1 wt %, balance iron (Fe), and other inevitable impurities; and fine precipitates distributed within the steel sheet. The additive includes at least one of titanium (Ti), niobium (Nb), and vanadium (V), and the fine precipitates include nitride or carbide of at least one of titanium (Ti), niobium (Nb), and vanadium (V) and trap hydrogen.
Provided is a cold-rolled steel sheet consisting of carbon (C): 0.23 wt % to 0.35 wt %, silicon (Si): 0.05 wt % to 0.5 wt %, manganese (Mn): 0.3 wt % to 2.3 wt %, phosphorus (P): more than 0 wt % and not more than 0.02 wt %, sulfur (S): more than 0 wt % and not more than 0.005 wt %, aluminum (Al): 0.01 wt % to 0.05 wt %, chromium (Cr): more than 0 wt % and not more than 0.8 wt %, molybdenum (Mo): more than 0 wt % and not more than 0.4 wt %, titanium (Ti): 0.01 wt % to 0.1 wt %, vanadium (V): more than 0 wt % and not more than 0.3 wt %, boron (B): 0.001 wt % to 0.005 wt %, and a balance of iron (Fe) and other unavoidable impurities, wherein a final microstructure of the cold-rolled steel sheet includes cementite, a transition carbide, and a fine precipitate, the transition carbide including E-carbide having an atomic ratio of a substitutional element selected from Fe, Mn, Cr, and Mo to C of 2.5:1, or η-carbide having an atomic ratio of the substitutional element to C of 2:1.
In an aspect, a method of manufacturing a non-oriented electrical steel sheet is provided, the method including hot rolling a slab including, by weight %, carbon (C) greater than 0% to 0.005% or less, silicon (Si): 2.0% or more to 4.0% or less, manganese (Mn): 0.1% or more to 0.5% or less, aluminum (Al): 0.9% or more to 1.5% or less, phosphorus (P): greater than 0% to 0.015% or less, sulfur (S): greater than 0% to 0.005% or less, nitrogen (N): greater than 0% to 0.005% or less, titanium (Ti): greater than 0% to 0.005% or less, a balance being iron (Fe), and inevitable impurities; preliminarily annealing the hot-rolled sheet; cold rolling the preliminarily annealed hot-rolled sheet; and cold annealing the cold-rolled sheet, wherein the cold annealing includes a first heating stage, a second heating stage, and a soaking stage, the cold-rolled sheet is heated from a start temperature to a recrystallization temperature at a first average heating rate in the first heating stage, and the cold-rolled sheet is heated from the recrystallization temperature to a target temperature at a second average heating rate faster than the first average heating rate in the second heating stage.
C21D 8/12 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
The present disclosure provides a method of manufacturing a non-oriented electrical steel sheet, the method including preparing a slab comprising, by weight %, carbon (C): more than 0% but not more than 0.002%, silicon (Si): 2.3% to 2.8%, manganese (Mn): 0.2% to 0.28%, aluminum (AI): 0.32% to 0.45%, phosphorus (P): more than 0% but not more than 0.015%, sulfur(S): more than 0% but not more than 0.002%, nitrogen (N): more than 0% but not more than 0.005%, titanium (Ti): more than 0% but not more than 0.002%, a balance of iron (Fe), and inevitable impurities; forming a hot-rolled sheet by hot rolling the slab, forming a hot-rolled annealed sheet by preliminarily annealing the hot-rolled sheet, forming a cold-rolled sheet by cold rolling the hot-rolled annealed sheet, and forming a cold-rolled annealed sheet by cold annealing the cold-rolled sheet, wherein manganese (Mn) and aluminum (AI) included in the slab satisfy Equation 1 (0.10≤1.3×[Mn]−0.46×[Al]≤0.18).
C21D 8/12 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
A high-performance steel bar according to an embodiment of the present invention comprises: 0.06-0.32 wt% of carbon (C); 0.1-0.5 wt% of silicon (Si); 0.5-2.0 wt% of manganese (Mn); 0.03 wt % or less (excluding 0) of phosphorus (P), 0.05 wt% or less (excluding 0) of sulfur (S), 0.010 wt% or less (excluding 0) of aluminum (Al), 0.5 wt% or less (excluding 0) of chromium (Cr), 0.3 wt% or less (excluding 0) of copper (Cu), 0.1-1.0 wt% of nickel (Ni), 0.1 wt% or less (excluding 0) of molybdenum (Mo), 0.0100 wt% or less (excluding 0) of nitrogen (N), and the balance being iron (Fe) and inevitable impurities, wherein the steel bar comprises a surface layer portion and a central portion formed to exclude the surface layer portion, the surface layer portion including at least one of bainite, tempered martensite, and martensite, the central portion including at least one of pearlite and ferrite, and has a room-temperature tensile strength (TS) of 580 MPa or more.
C21D 8/02 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
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
29.
THICK STEEL SHEET WITH EXCELLENT CRYOGENIC TOUGHNESS IN WELD HEAT-AFFECTED ZONE
HD KOREA SHIPBUILDING ＆ OFFSHORE ENGINEERING CO., LTD. (Republic of Korea)
HD HYUNDAI HEAVY INDUSTRIES CO., LTD. (Republic of Korea)
HD HYUNDAI SAMHO CO., LTD. (Republic of Korea)
Inventor
Eom, Hae Won
Jee, Chun Ho
Kim, Jong Chul
Chon, Seung Hwan
Park, Min Ho
Choi, Woo Hyuk
Won, Ju Yeon
Abstract
The present invention relates to a thick steel sheet exhibiting excellent cryogenic toughness in the weld heat-affected zone. The steel sheet comprises, by weight %, carbon (C): 0.03–0.10%, manganese (Mn): 1.4–3.0%, aluminum (Al): 0.025–0.10%, nickel (Ni): 4.8–6.0%, chromium (Cr): 0.1–1.0%, molybdenum (Mo): 0.1–1.0%, phosphorus (P): 0.01% or less (excluding 0%), sulfur (S): 0.01% or less (excluding 0%), and nitrogen (N): 0.01% or less (excluding 0%), and the balance being iron (Fe) and other inevitable impurities.
A non-oriented electrical steel sheet according to one embodiment of the present invention comprises 1.8-2.8 wt% of silicon (Si), 0.1-0.8 wt% of manganese (Mn), 0.4-1.5 wt% of aluminum (Al), 0.005 wt% or less of sulfur (S), 0.005 wt% or less of titanium (Ti), 0.07 wt% or less of tin (Sn), 0.065 wt% or less of niobium (Nb), 0.076 wt% or less of molybdenum (Mo), and the balance of iron (Fe) and other inevitable elements, and thus iron loss can be reduced.
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
The present invention provides a car body for a vehicle, the car body including: a battery case disposed at a lower part of a vehicle; a first front side member which is disposed at a front part of the vehicle and extends in a longitudinal direction of the vehicle; a second front side member which is disposed to be spaced apart from the first front side member in a width direction of the vehicle and extends in the longitudinal direction of the vehicle; and a rear cross member which connects the first front side member and the second front side member and extends in the width direction of the vehicle, wherein the rear cross member is provided to overlap a front part of the battery case.
B62D 21/15 - Understructures, i.e. chassis frame on which a vehicle body may be mounted having impact absorbing means, e.g. a frame designed to permanently or temporarily change shape or dimension upon impact with another body
The present application relates to a non-oriented electrical steel sheet and a manufacturing method therefor. According to the non-oriented electrical steel sheet and the manufacturing method therefor of the present application, the non-oriented electrical steel sheet can have excellent magnetic properties due to improved crystallographic texture.
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
33.
NON-ORIENTED ELECTRICAL STEEL SHEET AND METHOD FOR MANUFACTURING SAME
The present application relates to a non-oriented electrical steel sheet and a method for manufacturing same. According to the non-oriented electrical steel sheet and the method for manufacturing same of the present application, the non-oriented electrical steel sheet can possess excellent magnetic properties through texture improvement.
C22C 38/14 - Ferrous alloys, e.g. steel alloys containing titanium or zirconium
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
34.
NON-ORIENTED ELECTRICAL STEEL SHEET AND MANUFACTURING METHOD THEREFOR
The present application relates to a non-oriented electrical steel sheet and a manufacturing method therefor. According to the non-oriented electrical steel sheet and the manufacturing method therefor of the present application, the non-oriented electrical steel sheet can have excellent magnetic properties, and specifically, can have low iron loss.
C22C 38/14 - Ferrous alloys, e.g. steel alloys containing titanium or zirconium
C21D 8/12 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
H01F 1/147 - Alloys characterised by their composition
35.
NON-ORIENTED ELECTRICAL STEEL SHEET AND MANUFACTURING METHOD THEREFOR
By comprising 0.1 to 1.6 wt% of silicon (Si), 0.1 to 0.6 wt% of manganese (Mn), 0.4 to 1.5 wt% of aluminum (Al), 0.005 wt% or less of sulfur (S), 0.005 wt% or less of titanium (Ti), 0.03 wt% or less of tin (Sn), 0.025 wt% or less of niobium (Nb), 0.03 wt% or less of molybdenum (Mo), and the balance being iron (Fe) and other inevitable elements, the iron loss can be reduced without an increase in production costs.
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
36.
NON-ORIENTED ELECTRICAL STEEL SHEET AND METHOD FOR MANUFACTURING SAME
The present invention relates to a method for manufacturing a non-oriented electrical steel sheet and provides a method for manufacturing a non-oriented electrical steel sheet, the method comprising: a hot rolling step of hot-rolling a slab to produce a hot-rolled sheet, the slab comprising, by weight%, silicon (Si): 1.8 wt% to 2.8 wt%, manganese (Mn): 0.1 wt% to 0.5 wt%, aluminum (Al): 0.1 wt% to 0.7 wt%, sulfur (S): 0 wt% (exclusive) to 0.003 wt% (inclusive), and a total of at least one element selected from the group consisting of neodymium (Nd) and yttrium (Y): 0.0005 wt% to 0.0034 wt%, with the balance being iron (Fe) and inevitable impurities; a preliminary annealing step of annealing the hot-rolled sheet; a cold rolling step of cold-rolling the preliminarily annealed hot-rolled sheet to produce a cold-rolled sheet; and a cold rolling annealing step of cold annealing the cold-rolled sheet.
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
The present invention provides a vehicle subframe comprising: a first side member extending in the longitudinal direction of a vehicle; a second side member which extends in the longitudinal direction of the vehicle and which is spaced apart from the first side member in the width direction of the vehicle; a first cross member which extends in the width direction of the vehicle and which is connected to the first side member and the second side member; and a second cross member, which extends in the width direction of the vehicle, is spaced apart from the first cross member in the longitudinal direction of the vehicle, and is closer than the first cross member to the front of the vehicle, wherein the length of the first cross member in the height direction of the vehicle is longer than the length of the second cross member in the height direction of the vehicle.
B62D 21/15 - Understructures, i.e. chassis frame on which a vehicle body may be mounted having impact absorbing means, e.g. a frame designed to permanently or temporarily change shape or dimension upon impact with another body
B62D 29/00 - Superstructures characterised by material thereof
38.
NON-ORIENTED ELECTRICAL STEEL SHEET AND METHOD FOR MANUFACTURING SAME
The present invention provides a method for manufacturing a non-oriented electrical steel sheet, the method comprising: a hot rolling step of hot rolling a slab to prepare a hot-rolled sheet, the slab containing, in wt%, 1.0 wt% to 1.5 wt% of silicon (Si), 0.1 wt% to 0.4 wt% of manganese (Mn), 0.1 wt% to 0.4 wt% of aluminum (Al), 0 wt% (exclusive) to 0.003 wt% (inclusive) of sulfur (S), 0.0006 wt% (exclusive) to 0.0030 wt% (inclusive) of the sum of one or more elements selected from the group consisting of neodymium (Nd), praseodymium (Pr), and yttrium (Y), and the balance being iron (Fe) and inevitable impurities; a cold rolling step of cold rolling the hot-rolled sheet to prepare a cold-rolled sheet; and a cold-rolling annealing step of subjecting the cold-rolled sheet to cold-rolling annealing.
C22C 38/14 - Ferrous alloys, e.g. steel alloys containing titanium or zirconium
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
39.
WIRE ROD, MANUFACTURING METHOD THEREFOR, AND TIRECORD MANUFACTURED USING SAME
A wire rod with excellent drawing workability according to an embodiment of the present invention comprises: 0.70 to 1.10 wt% of carbon (C), 0.15 to 0.50 wt% of silicon (Si), 0.20 to 0.90 wt% of manganese (Mn), 0.015 wt% or less of phosphorus (P), 0.015 wt% or less of sulfur (S), 0.02 to 0.35 wt% of chromium (Cr), 0.010 wt% or less (excluding 0) of aluminum (Al), 0.005 wt% or less (excluding 0) of nitrogen (N), and the balance being iron (Fe) and other inevitable impurities. According to an embodiment of the present invention, in the cross-section cut in the direction perpendicular to the longitudinal direction of the wire rod, the maximum thickness of a decarburized layer, observed along the circumferential direction of the cross-section, is 0.08 mm or less.
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
B60C 9/00 - Reinforcements or ply arrangement of pneumatic tyres
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
40.
NON-ORIENTED ELECTRICAL STEEL SHEET AND MANUFACTURING METHOD THEREFOR
A non-oriented electrical steel sheet, according to one embodiment of the present invention, comprises: 2.8-3.8 wt% of silicon (Si); 0.1-0.8 wt% of manganese (Mn); 0.4-1.5 wt% of aluminum (Al); 0.005 wt% or less of sulfur (S); 0.005 wt% or less of titanium (Ti); 0.07 wt% or less of tin (Sn); 0.065 wt% or less of niobium (Nb); 0.076 wt% or less of molybdenum (Mo); and the balance of iron (Fe) and other inevitable elements. Thus, high-frequency iron loss may be reduced.
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
41.
ZINC ALLOY-PLATED STEEL AND MANUFACTURING METHOD THEREFOR
The present invention provides a zinc alloy-plated steel and a manufacturing method therefor, the zinc alloy-plated steel comprising: a base iron; a zinc alloy plating layer formed on at least one surface of the base iron; and an Fe-Al-based alloy interface layer provided between the base iron and the zinc alloy plating layer, wherein the zinc alloy plating layer comprises, by wt%, 1-3.5% of Mg, 1-4% of Al, and the balance of Zn and other inevitable impurities, and the average particle size of intermetallic compounds in the Fe-Al-based alloy interface layer is 81 nm or less.
A non-oriented electrical steel sheet, a method for manufacturing the non-oriented electrical steel sheet, and a motor, according to one embodiment of the present invention, comprise 0.1-1.6 wt% of silicon (Si), 0.2-0.4 wt% of manganese (Mn), 0.1-0.5 wt% of aluminum (Al), 0.003 wt% or less of carbon (C), 0.003 wt% or less of sulfur (S), 0.015 wt% or less of phosphorus (P), 0.003 wt% or less of nitrogen (N), and the balance of iron (Fe) and other inevitable impurities, wherein the orientation fraction of the final texture thereof satisfies relation 1, and thus a non-oriented electrical steel sheet with excellent magnetic properties can be provided.
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
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
43.
HOT STAMPING COMPONENT AND METHOD OF MANUFACTURING THE SAME
The present disclosure provides a method of manufacturing a hot stamping component, the method includes inserting a blank into a heating furnace, heating the blank, and transferring the heated blank from the heating furnace to a mold, wherein an air cooling time of the blank in the transferring of the blank satisfies Equation 1.
The present disclosure provides a method of manufacturing a hot stamping component, the method includes inserting a blank into a heating furnace, heating the blank, and transferring the heated blank from the heating furnace to a mold, wherein an air cooling time of the blank in the transferring of the blank satisfies Equation 1.
A section steel according to an embodiment of the present invention comprises, 0.04-0.14 wt% of carbon (C), 0.10-0.55 wt% of silicon (Si); 0.90-1.65 wt% of manganese (Mn), 0.02 wt % or less (excluding 0 wt%) of phosphorus (P), 0.007 wt% or less (excluding 0 wt%) of sulfur (S), 0.015-0.055 wt % of aluminum (Al), 0.03-0.2 wt% of molybdenum (Mo), 0.01-0.08 wt% of vanadium (V), 0.005-0.025 wt % of titanium (Ti), 0.01-0.05 wt% of niobium (Nb), and the balance of iron (Fe) and other inevitable impurities, and thus can ensure high strength and low-temperature impact toughness.
A composite-performance shaped steel according to an embodiment of the present invention comprises 0.08-0.17 wt% of carbon (C), 0.10-0.50 wt% of silicon (Si), 0.50-1.60 wt%, of manganese (Mn), 0.020 wt% or less (excluding 0) of phosphorus (P), 0.010 wt% or less (excluding 0) of sulfur (S), 0.10-0.70 wt% of chromium (Cr), 0.30-0.73 wt% of molybdenum (Mo), 0.50 wt% or less (excluding 0) of copper (Cu), 0.05 wt% or less (excluding 0) of niobium (Nb), 0.003 wt% or less (excluding 0) of boron (B), 0.012 wt% or less (excluding 0) of nitrogen (N), and the remainder of iron (Fe) and inevitable impurities, and the composite-performance shaped steel has a high-temperature yield strength (YS, 600℃) of 300 MPa or more.
A complex performance shaped steel according to an embodiment of the present invention contains 0.08-0.17 wt% of carbon (C), 0.10-0.50 wt% of silicon (Si), 0.50-1.60 wt% of manganese (Mn), more than 0 wt% and 0.020 wt% or less of phosphorous (P), more than 0 wt% and 0.010 wt% or less of sulfur (S), 0.10-0.35 wt% of chromium (Cr), 0.15-0.73 wt% of molybdenum (Mo), more than 0 wt% and 0.50 wt% or less of copper (Cu), 0.04-0.06 wt% of niobium (Nb), and more than 0 wt% and 0.012 wt% or less of nitrogen (N), with the remainder comprising iron (Fe) and inevitable impurities, and has a high-temperature yield strength (YS-600°C) of at least 280 MPa.
A steel section according to an embodiment of the present invention comprises 0.20-0.30 wt% of carbon (C), 0.10-0.30 wt% of silicon (Si), 1.00-1.50 wt% of manganese (Mn), 0.030 wt% or less (excluding 0) of phosphorus (P), 0.030 wt% or less (excluding 0) of sulfur (S), greater than or equal to 0.14 wt% and less than 0.30 wt% of copper (Cu), 0.040-0.130 wt% of vanadium (V), 0.005-0.020 wt% of nitrogen (N), and the remainder of iron (Fe) and inevitable impurities, the steel section having a yield strength (YS) of 550 MPa or more.
A high-performance steel rod according to an embodiment of the present invention comprises: 0.08-0.26 wt% of carbon (C); 0.50 wt% or less (excluding 0) of silicon (Si); 0.6-3.0 wt% of manganese (Mn); 0.025 wt% or less (excluding 0) of phosphorus (P), 0.025 wt% or less (excluding 0) of sulfur (S), 0.002-0.50 wt% of chromium (Cr), 0.50 wt% or less (excluding 0) of copper (Cu), 0.01-3.40 wt% of nickel (Ni), 0.002-0.10 wt% of molybdenum (Mo), 0.005-0.040 wt% of aluminum (Al), 0.10 wt% or less (excluding 0) of vanadium (V), 0.1 wt% or less (excluding 0) of niobium (Nb), 0.001-0.050 wt% of titanium (Ti), 0.015 wt% or less (excluding 0) of nitrogen (N), and the balance of iron (Fe) and inevitable impurities, wherein room temperature yield strength (YS) satisfies 500 MPa or higher.
A high-performance steel bar according to one embodiment of the present invention comprises 0.03-0.17 wt% of carbon (C), 0.50 wt% or less (excluding 0) of silicon (Si), 0.50-2.50 wt% of manganese (Mn), 0.02 wt% or less (excluding 0) of phosphorus (P), 0.02 wt% or less (excluding 0) of sulfur (S), 0.30-1.00 wt% of nickel (Ni), 0.002-0.500 wt% of chromium (Cr), 0.20 wt% or less (excluding 0) of copper (Cu), 0.003-0.150 wt% of molybdenum (Mo), 0.040 wt% or less (excluding 0) of aluminum (Al), 0.015 wt% or less (excluding 0) of nitrogen (N), and the balance of iron (Fe) and inevitable impurities, wherein the room-temperature yield strength (YS) is at least 600 MPa and the cryogenic yield strength (YS) is at least 820 MPa.
The present invention provides an ultra-high-strength galvanized steel sheet comprising: a steel sheet composed of an inner layer and a surface layer on the inner layer; and a plating layer on the steel sheet, wherein the surface layer has a thickness of 10-50 µm from the surface of the steel sheet, the inner layer contains, in wt%, 0.1-0.3% of C, 1.0-2.0% of Si, 2.5-3.5% of Mn, more than 0% and not more than 0.02% of P, and more than 0% and not more than 0.01% of S, with the remainder comprising iron (Fe), the area fraction of tempered martensite in the final microstructure of the inner layer is at least 50%, the surface layer has a lower carbon content than the inner layer and contains, in wt%, 1.0-2.0% of Si, 2.5-3.5% of Mn, more than 0% and not more than 0.02% of P, and more than 0% and not more than 0.01% of S, with the remainder comprising iron (Fe), the area fraction of tempered martensite in the final microstructure of the surface layer is 10% or less, and when grain boundaries having a misorientation of 15-180° in the final microstructure of the steel sheet are classified as high-angle grain boundaries, the ratio of the area fraction of high-angle grain boundaries on the surface to the area fraction of high-angle grain boundaries at a point 1/4 of the thickness of the steel sheet from the surface is 1.2 or more and less than 1.4.
According to one embodiment of the present invention, provided is a high-strength cold rolled steel sheet comprising, by wt%, 0.08-0.15% of carbon (C), 0.8-1.5% of silicon (Si), 2.0-3.0% of manganese (Mn), more than 0% and less than or equal to 1.0% of aluminum (Al), more than 0% and less than or equal to 0.02% of phosphorus (P), more than 0% and less than or equal to 0.01% of sulfur (S), more than 0% and less than or equal to 0.01% of nitrogen (N), 0.001-0.005% of boron (B), 0.1% or less (excluding 0%) in total of titanium (Ti) and/or niobium (Nb), and the balance of iron (Fe) and other inevitable impurities, wherein the final microstructure is composed of tempered martensite, bainite, fresh martensite, ferrite and retained austenite.
A high-performance steel bar, according to one embodiment of the present invention comprises 0.08-0.26 wt% of carbon (C), 0.50 wt% or less (excluding 0) of silicon (Si), 0.6-3.0 wt% of manganese (Mn), 0.025 wt% or less (excluding 0) of phosphorus (P), 0.025 wt% or less (excluding 0) of sulfur (S), 0.002-0.50 wt% of chromium (Cr), 0.50 wt% or less (excluding 0) of copper (Cu), 0.01-3.40 wt% of nickel (Ni), 0.002-0.10 wt% of molybdenum (Mo), 0.005-0.040 wt% of aluminum (Al), 0.10 wt% or less (excluding 0) of vanadium (V), 0.1 wt% or less (excluding 0) of niobium (Nb), 0.001-0.050 wt% of titanium (Ti), 0.015 wt% or less (excluding 0) of nitrogen (N), and the balance of iron (Fe) and inevitable impurities, wherein the room-temperature yield strength (YS) satisfies at least 500 MPa.
Section steel according to one embodiment of the present invention comprises 0.11-0.18 wt% of carbon (C), 1.0-1.65 wt% of manganese (Mn), 0.01-0.11 wt% of vanadium (V), 40-200 ppm of nitrogen (N), and the balance of iron (Fe) and other inevitable impurities, wherein the content ratio of vanadium (V) and nitrogen (N) satisfies relation 1 such that high strength and high impact toughness can be exhibited.
A plated steel according to the present invention comprises: a base steel; and a plating layer which is formed on the base steel and contains 1-4 wt% of aluminum (Al) and 1-3 wt% of magnesium (Mg), with the remainder comprising zinc (Zn) and inevitable impurities, wherein the weight ratio between aluminum and magnesium in the plating layer is 1.0-4.0, the plating layer includes a eutectic phase structure containing a Zn phase and a primary Zn phase structure, and the area fraction of the primary Zn phase structure and the Zn phase in the eutectic phase structure having matching crystal orientations is at least 30% in a cross section and the surface of the plating layer.
Provided is an ultra-high-strength steel sheet including carbon (C): 0.1 wt % to 0.30 wt %, silicon (Si): 1.0 wt % to 2.0 wt %, manganese (Mn): 1.5 wt % to 3.0 wt %, aluminum (Al): more than 0 wt % and not more than 0.05 wt %, a sum of one or more elements selected from niobium (Nb), titanium (Ti), and vanadium (V): more than 0 wt % and not more than 0.05 wt %, phosphorus (P): more than 0 wt % and not more than 0.02 wt %, sulfur (S): more than 0 wt % and not more than 0.005 wt %, nitrogen (N): more than 0 wt % and not more than 0.006 wt %, and a balance of iron (Fe) and other unavoidable impurities, wherein a final microstructure of the ultra-high-strength steel sheet consists of tempered martensite, martensite, ferrite, and retained austenite, and wherein the ultra-high-strength steel sheet has a yield strength (YP) of 850 MPa or more, a tensile strength (TS) of 1180 MPa or more, and an elongation (El) of 14% or more.
The present invention provides an ultrahigh-strength galvanized steel sheet comprising: a steel sheet consisting of an inner layer portion and a surface layer portion on the inner layer portion; and a plating layer on the steel sheet, wherein the surface layer portion has a thickness of 10-50 μm from the surface of the steel sheet, the inner layer portion contains, by wt%, 0.1-0.3% of carbon (C), 1.0-2.0% of silicon (Si), 2.5-3.5% of manganese (Mn), greater than 0% and less than or equal to 0.02% of phosphorus (P), greater than 0% and less than or equal to 0.01% of sulfur (S), and the remainder of iron (Fe), the final microstructure of the inner layer portion has an area fraction of tempered martensite of 50% or more, the surface layer portion has a lower carbon content than the inner layer portion and contains, by wt%, 1.0-2.0% of Si, 2.5-3.5% of Mn, greater than 0% and less than or equal to 0.02% of P, greater than 0 and less than or equal to 0.01% of S, and the remainder of F, and the final microstructure of the surface layer portion has an area fraction of tempered martensite of 10% or less, the galvanized steel sheet having a yield strength of 850-1070 Mpa, a tensile strength of greater than or equal to 1180 MPa and less than 1470 MPa, and an elongation of 14% or more.
The present invention provides a plated steel sheet comprising: a base steel sheet; and a plating layer on the base steel sheet, the base steel sheet comprising, by wt%, 0.1-0.4% of carbon (C), silicon (Si) in an amount greater than 0% and less than or equal to 2.0%, 1.5-4.0% of manganese (Mn), aluminum (Al) in an amount greater than 0% and less than or equal to 2.0%, phosphorus (P) in an amount greater than 0% and less than or equal to 0.02%, sulfur (S) in an amount greater than 0% and less than or equal to 0.005%, nitrogen (N) in an amount greater than 0% and less than or equal to 0.006%, boron (B) in an amount greater than 0% and less than or equal to 0.003% and the balance of iron (Fe) and other inevitable impurities, wherein the sum of the amount of silicon (Si) and the amount of aluminum (Al) in the base steel sheet is 2.0% or less, and the ratio of the amount of silicon (Si) to the amount of aluminum (Al) is less than 4.0.
An exemplary embodiment of the present invention discloses an aluminum-based blank including: a first plated steel plate; a second plated steel plate connected to the first plated steel plate; and a joint connecting the first plated steel plate and the second plated steel plate at a boundary between the first plated steel plate and the second plated steel plate.
The present invention provides a skid device for a continuous heating furnace, the skid device comprising: a skid beam for supporting a material to be heated in a heating furnace; and a plurality of skid riders disposed on the upper portion of the skid beam along the longitudinal direction of the skid beam so that the material to be heated can be placed thereon and moved. When a direction parallel to the longitudinal direction of the skid beam is defined as the lengthwise dimension (x) of the upper surface of the skid riders and a direction parallel to the width direction of the skid beam is defined as the widthwise dimension (y) of the upper surface of the skid riders, the lengthwise dimension (x) is equal to or greater than the widthwise dimension (y), and the relative ratio of the widthwise dimension to the lengthwise dimension is 0.7 to 1.0.
F27B 9/20 - Furnaces through which the charge is moved mechanically, e.g. of tunnel type Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatmentFurnaces through which the charge is moved mechanically, e.g. of tunnel type Similar furnaces in which the charge moves by gravity characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path
61.
ULTRAHIGH-STRENGTH COLD ROLLED STEEL SHEET HAVING EXCELLENT HYDROGEN EMBRITTLEMENT RESISTANCE, AND MANUFACTURING METHOD THEREFOR
The present invention provides an ultrahigh-strength cold rolled steel sheet having a tensile strength of 1,100 MPa or more and excellent hydrogen embrittlement resistance, and a manufacturing method therefor. According to one embodiment of the present invention, the ultrahigh-strength cold rolled steel sheet having excellent hydrogen embrittlement resistance comprises, by wt%, 0.1-0.5% of carbon (C), 0.01-2.0% of silicon (Si), 0.1-5.0% of manganese (Mn), 0.01-2.0% of aluminum (Al), more than 0% and less than or equal to 3.0% of chromium (Cr), more than 0% and less than or equal to 1.0% of molybdenum (Mo), more than 0% and less than or equal to 0.4% of nickel (Ni), 0.05-0.4% of copper (Cu), 0.01-0.2% of titanium (Ti), 0.01-0.1% of niobium (Nb), 0.01-1.0% of vanadium (V), 0.001-0.005% of boron (B), more than 0% and less than or equal to 0.02% of phosphorus (P), more than 0% and less than or equal to 0.01% of sulfur (S), and the balance of iron (Fe) and other inevitable impurities, and satisfies a tensile strength (TS) of at least 1,100 MPa, an elongation (EL) of at least 3% and a hydrogen embrittlement test non-fracture time of at least 100 hours.
The present invention provides an ultra-high strength cold-rolled steel sheet having a strength of 1100 MPa or more on the basis of tensile strength and excellent hydrogen embrittlement resistance, and a manufacturing method therefor. According to one embodiment of the present invention, the ultra-high strength cold-rolled steel sheet having excellent hydrogen embrittlement resistance comprises by wt%, carbon (C): 0.1-0.5%, silicon (Si): 0.01-2.0%, manganese (Mn): 0.1-5.0%, aluminum (Al): 0.01-2.0%, chromium (Cr): more than 0% to 3.0%, molybdenum (Mo): more than 0% to 1.0%, nickel (Ni): more than 0% to 0.4%, copper (Cu): 0.05-0.4%, titanium (Ti): 0.01-0.2%, niobium (Nb): 0.01-0.1%, vanadium (V): 0.01-1.0%, boron (B): 0.001-0.005%, phosphorus (P): more than 0% to 0.02%, sulfur (S): more than 0% to 0.01%, and the balance of iron (Fe) and other inevitable impurities, and includes a hot-dip galvanized layer or an alloyed hot-dip galvanized layer on the surface, wherein the steel sheet satisfies a tensile strength (TS) of 1100 MPa or more, an elongation (EL) of 3% or more, and a fracture-free time of 100 hours or more on the basis of a hydrogen embrittlement test method.
The present invention provides: a heating furnace device for heating a material to be heated while supporting same by a skid beam and transferring same; and a method for preventing oxide scale fusion in a heating furnace using same. The heating furnace device comprises a skid rider disposed on one side of a skid beam so as to be in contact with the lower surface of a material to be heated, wherein the height of the skid rider is 75 mm to 100 mm, and the area of the upper surface of the skid rider is 7,500 mm2to 10,000 mm2.
The present application relates to a metal separator and a method for manufacturing same. According to the metal separator and the manufacturing method therefor of the present application, electrical conductivity and corrosion resistance can be excellent at the same time.
The present invention relates to a cryogenic chamber for impact testing, which comprises in one aspect a container having a sidewall formed by at least two layers and an upper side opened, wherein the sidewall includes a first sidewall and a second sidewall shaped to surround the first sidewall, the first sidewall partitions a first space in which a specimen may be arranged, the second space partitions a second space to perform thermal insulation treatment between the first sidewall and the second sidewall, the second space has a structure in which the upper side is closed, and a first cooling medium is continuously supplied to the second space, thereby blocking heat transfer between the first space and the outside, while a second cooling medium is continuously supplied to the first space, thereby cooling the specimen.
Provided is a non-oriented electrical steel sheet including carbon (C): more than 0 wt % and not more than 0.003 wt %, silicon (Si): 2.0 wt % to 4.0 wt %, manganese (Mn): 0.1 wt % to 0.5 wt %, aluminum (Al): 0.3 wt % to 0.9 wt %, phosphorus (P): more than 0 wt % and not more than 0.015 wt %, sulfur (S): more than 0 wt % and not more than 0.003 wt %, nitrogen (N): more than 0 wt % and not more than 0.003 wt %, titanium (Ti): more than 0 wt % and not more than 0.003 wt %, and a balance of iron (Fe) and other unavoidable impurities, wherein a final microstructure of the non-oriented electrical steel sheet satisfies Inequality 1:
Provided is a non-oriented electrical steel sheet including carbon (C): more than 0 wt % and not more than 0.003 wt %, silicon (Si): 2.0 wt % to 4.0 wt %, manganese (Mn): 0.1 wt % to 0.5 wt %, aluminum (Al): 0.3 wt % to 0.9 wt %, phosphorus (P): more than 0 wt % and not more than 0.015 wt %, sulfur (S): more than 0 wt % and not more than 0.003 wt %, nitrogen (N): more than 0 wt % and not more than 0.003 wt %, titanium (Ti): more than 0 wt % and not more than 0.003 wt %, and a balance of iron (Fe) and other unavoidable impurities, wherein a final microstructure of the non-oriented electrical steel sheet satisfies Inequality 1:
Inequality
1
:
0.00172
[
A
]
-
0
.
0
2
6
6
[
B
]
<
2
.
0
(where [A] represents an average number of second-phase particles in a steel sheet cross-section with an area of 10×10 mm2, and [B] represents a volume fraction value (unit: %) of particles with an average size of 2 μm or more among the second-phase particles.)
C21D 9/46 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for sheet metals
C21D 8/12 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
Provided is a non-oriented electrical steel sheet including silicon (Si): 2.8 wt % to 3.8 wt %, manganese (Mn): 0.2 wt % to 0.5 wt %, aluminum (Al): 0.5 wt % to 1.5 wt %, carbon (C): more than 0 wt % and not more than 0.003 wt %, phosphorus (P): more than 0 wt % and not more than 0.015 wt %, sulfur(S): more than 0 wt % and not more than 0.003 wt %, nitrogen (N): more than 0 wt % and not more than 0.003 wt %, titanium (Ti): more than 0 wt % and not more than 0.003 wt %, and a balance of iron (Fe) and other unavoidable impurities, wherein second-phase particles with an average diameter of 1.0 μm or more among second-phase particles constituting a microstructure of the non-oriented electrical steel sheet have a volume fraction of 60% or more, and wherein the non-oriented electrical steel sheet has a core loss (W10/400) of 12.0 W/kg or less.
C21D 9/46 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for sheet metals
C21D 8/12 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
Provided are an ultra-high strength galvanized steel sheet having excellent weldability and a manufacturing method therefor. According to an embodiment of the present invention, the ultra-high strength galvanized steel sheet comprises: a steel sheet base material including, in wt %, carbon (C): 0.1-0.3%, silicon (Si): 1.0-2.0%, manganese (Mn): 2.5-3.5%, aluminum (Al): 0.05% or less (including 0%), chromium (Cr): 1.0% or less (including 0%), molybdenum (Mo): 0.2% or less (including 0%), titanium + niobium + vanadium (Ti + Nb + V): 0.05 wt % or less (including 0 wt %), and the balance of iron (Fe) and other inevitable impurities; an iron coating layer formed on the surface of the steel sheet base material; and a hot-dip galvanized layer formed on the surface of the iron coating layer, wherein an inner oxide is formed on the interface between the steel sheet base material and the iron coating layer to suppress the formation of an oxide on the interface between the iron coating layer and the hot-dip galvanized layer, the inner oxide being spherical in shape.
Provided is a non-oriented electrical steel sheet including silicon (Si): 2.8 wt % to 3.8 wt %, manganese (Mn): 0.2 wt % to 0.5 wt %, aluminum (Al): 0.5 wt % to 1.2 wt %, carbon (C): more than 0 wt % and not more than 0.002 wt %, phosphorus (P): more than 0 wt % and not more than 0.015 wt %, sulfur (S): more than 0 wt % and not more than 0.002 wt %, nitrogen (N): more than 0 wt % and not more than 0.002 wt %, titanium (Ti): more than 0 wt % and not more than 0.002 wt %, and a balance of iron (Fe) and unavoidable impurities, wherein, in a final microstructure, grains with {111}//ND orientation have a volume fraction of 30% or less and an average misorientation angle of 23° or more, and grains with {001}//ND orientation have a volume fraction of 15% or more and an average misorientation angle of 48° or more.
C21D 9/46 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for sheet metals
C21D 8/12 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
Provided is a method of manufacturing a plated steel material having excellent workability and corrosion resistance according to an exemplary embodiment of the present disclosure and the method includes steps of immersing a base steel in a hot-dip alloy plating bath; and forming a hot-dip alloy-plated layer on the base steel by drawing the immersed base steel from the hot-dip alloy plating bath and performing a cooling process. A first average cooling rate in the cooling process varies depending on a difference between a first temperature that is a temperature of the hot-dip alloy plating bath and a second temperature that is a solidification start temperature of a MgZn2 phase constituting the hot-dip alloy-plated layer.
The present invention provides a cold-rolled steel material comprising, by weight, 0.04% to 0.07% of carbon (C), 0.1% to 0.3% of silicon (Si), 1.1% to 1.5% of manganese (Mn), 0.015% to 0.06% of aluminum (Al), more than 0% to 0.02% of phosphorus (P), more than 0% to 0.005% of sulfur (S), 0.02% to 0.04% of niobium (Nb), 0.17% to 0.23% of titanium (Ti), more than 0% to 0.1% of chromium (Cr), more than 0% to 0.005% of nitrogen (N), and the balance being iron (Fe) and other inevitable impurities, and having a yield strength (YS) of 600 Mpa to 900 MPa, an elongation (El) of 8% or more, and a yield ratio (YR) of 95% or more.
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 10/00 - Modifying the physical properties by methods other than heat treatment or deformation
C21D 9/46 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for sheet metals
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
73.
MULTI-STAGE PRESS FORMING METHOD OF PLATE AND PLATE FORMING MOLD DEVICE
The present disclosure provides a method and device for forming a plate to have a hat shape that protrudes from a bottom surface to a certain height and has a flat surface on an upper portion. In one aspect, the method comprises a) forming a plate to have a protrusion shape having a curved surface on an upper portion such that a thickness reduction rate of the plate is substantially uniform; b) forming corner portions at both ends of the plate by moving the plate whereby the protrusion portion of the plate has a substantially flat surface; and c) forming a flat surface by correcting protruding portions in the corner portions at both ends to make the protruding portions flat.
A high-performance steel rod according to an embodiment of the present invention comprises: 0.03-0.10 wt% of carbon (C); 0.05-0.45 wt% of silicon (Si); 1.45-2.00 wt% of manganese (Mn); 0.040 wt% or less of phosphorus (P); 0.040 wt% or less of sulfur (S); 0.060 wt% or less of aluminum (Al); 0.50-1.60 wt% of nickel (Ni); 0.05-1.20 wt% of chromium (Cr); 0.30 wt% or less of copper (Cu); 0.005-0.015 wt% of nitrogen (N); and the remainer being iron (Fe) and inevitable impurities, wherein the yield strength (YS) at -170 ℃ is 550 MPa or more.
Provided is an ultra-high-strength reinforcing bar and a method for manufacturing the same are disclosed. In an exemplary embodiment, the ultra-high-strength reinforcing bar includes an amount of 0.10 to 0.45 wt % carbon (C), an amount of 0.5 to 1.0 wt % silicon (Si), an amount of 0.40 to 1.80 wt % manganese (Mn), an amount of 0.10 to 1.0 wt % chromium (Cr), an amount greater than 0 and less than or equal to 0.2 wt % vanadium (V), an amount greater than 0 and less than or equal to 0.4 wt % copper (Cu), an amount greater than 0 and less than or equal to 0.5 wt % molybdenum (Mo), an amount of 0.015 to 0.070 wt % aluminum (Al), an amount greater than 0 and less than or equal to 0.25 wt % nickel (Ni), an amount greater than 0 and less than or equal to 0.1 wt % tin (Sn), an amount greater than 0 and less than or equal to 0.05 wt % phosphorus (P), an amount greater than 0 and less than or equal to 0.03 wt % sulfur (S), an amount of 0.005 to 0.02 wt % nitrogen (N), and the remainder being iron (Fe) and other inevitable impurities.
C21D 8/06 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires
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 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
E04C 5/06 - Reinforcing elements of metal, e.g. with non-structural coatings of high bending resistance, i.e. of essentially three-dimensional extent, e.g. lattice girders
76.
WIRE ROD FOR TIRECORD, MANUFACTURING METHOD THEREOF, AND TIRECORD MANUFACTURED BY USING SAME
The present invention relates to a wire rod for a tirecord, a manufacturing method thereof, and a tirecord manufactured by using same. More specifically, the wire rod for a tirecord comprises: 0.70-0.95 wt% of carbon (C); 0.15-0.50 wt% of silicon (Si); 0.30-0.90 wt% of manganese (M); 0.015 wt% or less of phosphorus (P); 0.015 wt% or less of sulfur (S); 0.02-0.15 wt% of copper (Cu); 0.01-0.15 wt% of nickel (Ni); 0.010 wt% or less of aluminum (Al); 0.005 wt% or less of nitrogen (N); and the balance of iron (Fe) and other inevitable impurities, and can satisfy Equation 1 below. [Equation 1] 0.05 wt% ≤ [Cu] + [Ni] ≤ 0.30 wt% (in Equation 1 above, [Cu] is the content of copper (Cu), and [Ni] is the content of nickel (Ni))
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
B60C 9/00 - Reinforcements or ply arrangement of pneumatic tyres
77.
NON-ORIENTED ELECTRICAL STEEL SHEET AND METHOD FOR MANUFACTURING SAME
Provided is a method of manufacturing a non-oriented electrical steel sheet, the method including providing a steel material containing silicon (Si), manganese (Mn), and aluminum (AI), hot rolling the steel material, first heat treating the hot-rolled steel material before coiling, coiling the first heat-treated steel material, uncoiling and cold rolling the coiled steel material, and cold annealing the cold-rolled steel material.
C21D 8/12 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
Provided is a cold-rolled steel sheet consisting of carbon (C): 0.23 wt % to 0.35 wt %, silicon (Si): 0.05 wt % to 0.5 wt %, manganese (Mn): 0.3 wt % to 2.3 wt %, phosphorus (P): more than 0 wt % and not more than 0.02 wt %, sulfur (S): more than 0 wt % and not more than 0.005 wt %, aluminum (Al): 0.01 wt % to 0.05 wt %, chromium (Cr): more than 0 wt % and not more than 0.8 wt %, molybdenum (Mo): more than 0 wt % and not more than 0.4 wt %, titanium (Ti): 0.01 wt % to 0.1 wt %, boron (B): 0.001 wt % to 0.005 wt %, a balance of iron (Fe), and unavoidable impurities, wherein a final microstructure of the cold-rolled steel sheet includes cementite, a transition carbide, and a fine precipitate, the transition carbide including ε-carbide having an atomic ratio of a substitutional element selected from Fe, Mn, Cr, and Mo, to C of 2.5:1, or η-carbide having an atomic ratio of the substitutional element to C of 2:1, and the fine precipitate having an atomic ratio of an alloying element selected from Mo and Ti, to C of 1:1.
The method for manufacturing bar steel according to an embodiment of the present invention comprises the steps of: (a) reheating bar steel containing 0.14 - 0.43 wt% of carbon (C), 0.4 - 1.75 wt% of manganese (Mn), 0.05 - 0.30 wt% of silicon (Si), 0.0 wt% (exclusive) - 0.04 wt% of phosphorus (P), 0.0 wt% (exclusive) - 0.04 wt% of sulfur (S), 0.002 wt% (exclusive) - 1.0 wt% of chromium (Cr), 0.0 wt% (exclusive) - 0.5 wt% of copper (Cu), 0.0 wt% (exclusive) - 0.25 wt% of nickel (Ni), 0.015 wt% (exclusive) - 0.085 wt% of molybdenum (Mo), 0.040 wt% or less of aluminum (Al), 0.002 wt% (exclusive) - 0.15 wt% of vanadium (V), 0.040 wt% or less of nitrogen (N), and the balance of iron (Fe) and inevitable impurities to 1,000 - 1,080℃; (b) hot rolling the steel bar while controlling the rolling to start at a temperature of 950-1050℃ and end at a temperature of 960-1,020℃; and (c) cooling the steel bar.
Provided is a method of manufacturing a non-oriented electrical steel sheet, the method including first hot-rolling each of first and second steel materials containing silicon (Si), manganese (Mn), and aluminum (Al), forming a first laminated structure by laminating the first hot-rolled first and second steel materials, forming a second laminated structure by second hot-rolling the first laminated structure, forming a third laminated structure by cold-rolling the second laminated structure, and cold-annealing the third laminated structure.
C21D 8/12 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
In one aspect, an electric furnace is provided with a double type melting furnace, which includes: a first upper cell that forms a first upper space of a first melting furnace in which a first iron source is introduced and molten; a second upper cell that is disposed in a horizontal direction of the first upper cell and forms a second upper space of a second melting furnace in which a second iron source is introduced and molten; a lower cell that is combined with lower portions of the first upper cell and the second upper cell and forms a single integrated space in which a first lower space of the first melting furnace and a second lower space of the second melting furnace are integrated; and a partition wall unit that is installed to vertically move up and down between the first upper cell and the second upper cell, and separates the first lower space of the first melting furnace and the second lower space of the second melting furnace, although both of the lower spaces are integrally formed by the lower cell.
F27B 3/04 - Hearth-type furnaces, e.g. of reverberatory typeElectric arc furnaces of multiple-hearth typeHearth-type furnaces, e.g. of reverberatory typeElectric arc furnaces of multiple-chamber typeCombinations of hearth-type furnaces
C21B 13/12 - Making spongy iron or liquid steel, by direct processes in electric furnaces
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
F27B 3/10 - Details, accessories or equipment, e.g. dust-collectors, specially adapted for hearth-type furnaces
F27B 3/22 - Arrangements of air or gas supply devices
F27D 3/00 - ChargingDischargingManipulation of charge
H05B 7/20 - Direct heating by arc discharge, i.e. where at least one end of the arc directly acts on the material to be heated, including additional resistance heating by arc current flowing through the material to be heated
The present application relates to a metal separator, a fuel cell comprising the metal separator, and a fuel cell stack comprising the fuel cell. According to the metal separator of the present application, it is possible to secure airtightness while preventing deformation of manifold inlet-and-outlet holes, and to uniformly distribute the flow rate of an injected and discharged reaction gas.
H01M 8/0228 - Composites in the form of layered or coated products
H01M 8/0247 - CollectorsSeparators, e.g. bipolar separatorsInterconnectors characterised by the form
H01M 8/0258 - CollectorsSeparators, e.g. bipolar separatorsInterconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant
H01M 8/0273 - Sealing or supporting means around electrodes, matrices or membranes with sealing or supporting means in the form of a frame
H01M 8/1004 - Fuel cells with solid electrolytes characterised by membrane-electrode assemblies [MEA]
H01M 8/0271 - Sealing or supporting means around electrodes, matrices or membranes
Provided is an ultra-high strength cold-rolled steel sheet, including: carbon (C): 0.23% to 0.40%; silicon (Si): 0.05% to 1.0%; manganese (Mn): 0.5% to 3.0%; vanadium (V): 0.01% to 0.12%; aluminum (Al): 0.01% to 0.3%; chromium (Cr): greater than 0% and 0.5% or less; titanium (Ti): greater than 0% and 0.1% or less; phosphorus (P): greater than 0% and 0.02% or less; sulfur(S): greater than 0% and 0.01% or less; and boron (B): 0.001% to 0.005%, based on % by weight; and a remainder being Fe and other unavoidable impurities, wherein a final microstructure includes tempered martensite having a volume fraction of 90% or more, wherein an average spacing between precipitates in the tempered martensite is 300 nm or more, an average size of the precipitates is 200 nm or less, and the number of precipitates having an average size of 40 nm or less is 25 or more based on an area of 20 μm2 in the final microstructure.
Provided are an ultra-high strength cold-rolled steel sheet whose microstructure has been controlled to have high strength and elongation, and a manufacturing method thereof. In accordance with an embodiment of the present disclosure, the ultra-high strength cold-rolled steel sheet includes: carbon (C): 0.28% to 0.45%; silicon (Si): 1.0% to 2.5%; manganese (Mn): 1.5% to 3.0%; aluminum (Al): 0.01% to 0.05%; chromium (Cr): greater than 0% and 1.0% or less; molybdenum (Mo): greater than 0% and 0.5% or less; a total of niobium (Nb), titanium (Ti) and vanadium (V): greater than 0% and 0.1% or less; phosphorus (P): greater than 0% and 0.03% or less; sulfur (S): greater than 0% and 0.03% or less; and nitrogen (N): greater than 0% and 0.01% or less, based on % by weight; and the remainder being Fe and other unavoidable impurities, wherein the ultra-high strength cold-rolled steel sheet satisfies a yield strength (YP) of 1180 MPa or more, a tensile strength (TS) of 1470 MPa or more, an elongation (El) of 15% or more, a yield ratio (YR) of 75% or more, and a bendability (R/t) of 3.0 or less.
According to an aspect of the present disclosure, provided is a hot stamping part including a steel plate that includes carbon (C) in an amount of 0.26 to 0.40 wt %, silicon (Si) in an amount of 0.02 to 2.0 wt %, manganese (Mn) in an amount of 0.3 to 1.60 wt %, phosphorus (P) in an amount of 0.03 wt % or less, sulfur(S) in an amount of 0.008 wt % or less, chromium (Cr) in an amount of 0.05 to 0.90 wt %, boron (B) in an amount of 0.0005 to 0.01 wt %, molybdenum (Mo) in an amount of 0.05 to 0.2 wt %, titanium (Ti) in an amount of 0.001 to 0.095 wt %, niobium (Nb) in an amount of 0.001 to 0.095 wt %, vanadium (V) in an amount of 0.001 to 0.095 wt %, the balance of iron (Fe), and other inevitable impurities, the hot stamping part having tensile strength of 1,700 MPa or more and yield strength of 1,150 MPa or more, wherein the hot stamping part includes microstructure including austenite grains and carbon-based precipitates including at least one of niobium (Nb), titanium (Ti), molybdenum (Mo), and vanadium (V), and an average size of the austenite grains is 15 μm or less.
A hot stamping part includes: a base material; a decarburization layer located on the base material; and an inner oxide layer located on the decarburization layer, wherein the hot stamping part has a tensile strength (TS) of 1680 MPa to 2000 MPa, and a hardness of the hot stamping part within a depth of 50 μm from a surface of the hot stamping part in a plate thickness direction of the hot stamping part and an average hardness of the hot stamping part satisfy Relational Expression 1.
A hot stamping part includes: a base material; a decarburization layer located on the base material; and an inner oxide layer located on the decarburization layer, wherein the hot stamping part has a tensile strength (TS) of 1680 MPa to 2000 MPa, and a hardness of the hot stamping part within a depth of 50 μm from a surface of the hot stamping part in a plate thickness direction of the hot stamping part and an average hardness of the hot stamping part satisfy Relational Expression 1.
(
A
/
B
)
≤
0
.
7
<
Relational
Expression
1
>
A hot stamping part includes: a base material; a decarburization layer located on the base material; and an inner oxide layer located on the decarburization layer, wherein the hot stamping part has a tensile strength (TS) of 1680 MPa to 2000 MPa, and a hardness of the hot stamping part within a depth of 50 μm from a surface of the hot stamping part in a plate thickness direction of the hot stamping part and an average hardness of the hot stamping part satisfy Relational Expression 1.
(
A
/
B
)
≤
0
.
7
<
Relational
Expression
1
>
(In Relational Expression 1, A denotes the hardness (Hv(≤50 μm)) within the depth of 50 μm in the plate thickness direction of the hot stamping part, and B denotes the average hardness (Hv(avg.)) of the hot stamping part.)
A hot stamping component includes: a base material; a decarburization layer located on the base material; and an inner oxide layer located on the decarburization layer, wherein the hot stamping component has a tensile strength (TS) of 1350 MPa to 1680 MPa, and a hardness of the hot stamping component within a depth of 50 μm from a surface of the hot stamping component in a plate thickness direction of the hot stamping component and an average hardness of the hot stamping component satisfy Relational Expression 1.
A hot stamping component includes: a base material; a decarburization layer located on the base material; and an inner oxide layer located on the decarburization layer, wherein the hot stamping component has a tensile strength (TS) of 1350 MPa to 1680 MPa, and a hardness of the hot stamping component within a depth of 50 μm from a surface of the hot stamping component in a plate thickness direction of the hot stamping component and an average hardness of the hot stamping component satisfy Relational Expression 1.
(
A
/
B
)
≤
0
.
7
<
Relational
Expression
1
>
A hot stamping component includes: a base material; a decarburization layer located on the base material; and an inner oxide layer located on the decarburization layer, wherein the hot stamping component has a tensile strength (TS) of 1350 MPa to 1680 MPa, and a hardness of the hot stamping component within a depth of 50 μm from a surface of the hot stamping component in a plate thickness direction of the hot stamping component and an average hardness of the hot stamping component satisfy Relational Expression 1.
(
A
/
B
)
≤
0
.
7
<
Relational
Expression
1
>
(In Relational Expression 1, A denotes the hardness (Hv(≤50 μm)) within the depth of 50 μm in the plate thickness direction of the hot stamping component, and B denotes the average hardness (Hv(avg.)) of the hot stamping component.)
The present application relates to a metal separator, a fuel cell comprising the metal separator, and a fuel cell stack comprising the fuel cell. According to the metal separator of the present application, deformation of manifold inlet and outlet holes can be prevented, airtightness can be ensured, and the flow rates of injected and discharged reaction gases can be uniformly distributed.
H01M 8/0247 - CollectorsSeparators, e.g. bipolar separatorsInterconnectors characterised by the form
H01M 8/0258 - CollectorsSeparators, e.g. bipolar separatorsInterconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant
H01M 8/0273 - Sealing or supporting means around electrodes, matrices or membranes with sealing or supporting means in the form of a frame
H01M 8/0245 - Composites in the form of layered or coated products
H01M 8/1004 - Fuel cells with solid electrolytes characterised by membrane-electrode assemblies [MEA]
H01M 8/2483 - Details of groupings of fuel cells characterised by internal manifolds
Korea University Research and Business Foundation (Republic of Korea)
Korea Institute of Science and Technology (Republic of Korea)
Inventor
Chung, Jun Ho
Kim, Tae Hyung
Abstract
Provided is a steel reinforcement including an amount of 0.07 to 0.43 wt % of carbon (C), an amount of 0.5 to 2.0 wt % of manganese (Mn), an amount of 0.05 to 0.5 wt % of silicon (Si), an amount greater than 0 and less than or equal to 0.5 wt % of chromium (Cr), an amount greater than 0 and less than or equal to 4.5 wt % of copper (Cu), an amount greater than 0 and less than or equal to 0.003 wt % of boron (B), an amount greater than 0 and less than or equal to 0.25 wt % of vanadium (V), an amount greater than 0 and less than or equal to 0.012 wt % of nitrogen (N), an amount greater than 0 and less than or equal to 0.03 wt % of phosphorus (P), an amount greater than 0 and less than or equal to 0.03 wt % of sulfur(S), an amount of 0.01 to 0.5 wt % of the sum of one or more of nickel (Ni), niobium (Nb) and titanium (Ti), the balance of iron (Fe), and other inevitable impurities. A final microstructure includes ferrite, bainite, pearlite, retained austenite, and precipitates comprising copper.
A high-performance steel bar, according to one embodiment of the present invention, comprises 0.04-0.09 wt% of carbon (C), 0.6 wt% or less (excluding 0) of silicon (Si), 1.45-2.5 wt % of manganese (Mn), 0.2-2.0 wt% of nickel (Ni), 0.7 wt% or less (excluding 0) of chromium (Cr), 0.001-0.07 wt% of niobium (Nb), 0.003-0.09 wt% of vanadium (V), 0.02 wt% or less (excluding 0) of phosphorus (P), 0.02 wt% or less (excluding 0) of sulfur (S), 0.5 wt% or less (excluding 0) of copper (Cu), 0.002-0.05 wt% of molybdenum (Mo), 0.001-0.07 wt% of aluminum (Al), 0.01 wt% or less (excluding 0) of nitrogen (N), and the balance of iron (Fe) and inevitable impurities, and satisfies formula 1 below, wherein the yield strength (YSun) of an unnotched specimen at -170°C is 600 MPa or more. [Formula 1] 1668.26×C(wt%) + 1157.54×Si(wt%) + 81.40×Mn(wt%) + 94.51×Ni(wt%) + 202.33×Cr(wt%) + 5228.70×Nb(wt%) + 2256.36×V(wt%) ≥ 595.01
In one aspect, a method of manufacturing an ultra-high strength galvanized steel sheet is provided, the method including a step of annealing a cold-rolled steel sheet in an annealing furnace, wherein an annealing time (A) for performing the annealing and a moisture concentration (B) in the annealing furnace are controlled based on the product of the positive square root (A1/2) of the annealing time and the natural logarithm value (ln(1/B)) of the reciprocal value of the moisture concentration.
The present invention relates to a non-oriented electrical steel sheet and a method for manufacturing same. According to the non-oriented electrical steel sheet and the method for manufacturing same of the present application, deformation of the steel sheet during heat treatment can be minimized to suppress an increase in iron loss, and thus excellent magnetic properties can be achieved.
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
H01F 1/147 - Alloys characterised by their composition
93.
INTEGRATED SYSTEM FOR REGENERATING SODIUM BICARBONATE AND RECOVERING AMMONIA
HYUNDAI ENGINEERING ＆ CONSTRUCTION CO., LTD. (Republic of Korea)
Inventor
Song, Kang
Cha, Kwang Seo
Park, Jun Young
Lee, Je Shin
Lee, Sang Hyung
Park, In Sun
Kim, Jong Hwan
Park, Jong Sik
Park, Sung Hyun
Abstract
The present application relates to an integrated system for regenerating sodium bicarbonate and recovering ammonia, and an integrated method for regenerating sodium bicarbonate and recovering ammonia by using same. According to the integrated system for regenerating sodium bicarbonate and recovering ammonia, and the integrated method for regenerating sodium bicarbonate and recovering ammonia by using same, of the present application, sodium bicarbonate can be regenerated and ammonia can be recovered from ammonium sulfate wastewater, generated during sodium bicarbonate regeneration, so as to be reused as ammonia water, and thus the cost of purchasing ammonia water required for process operation can be reduced, and additional operating revenue can be created through the commercialization of the generated ammonia water.
B01D 53/14 - Separation of gases or vapoursRecovering vapours of volatile solvents from gasesChemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases or aerosols by absorption
A material for hot stamping according to an embodiment of the present disclosure includes: a steel sheet including carbon (C) in an amount of 0.28 to 0.50 wt %, silicon (Si) in an amount of 0.15 to 0.70 wt %, manganese (Mn) in an amount of 0.5 to 2.0 wt %, phosphorus (P) in an amount of 0.05 wt % or less, sulfur(S) in an amount of 0.01 wt % or less, chromium (Cr) in an amount of 0.1 to 0.5 wt %, boron (B) in an amount of 0.001 to 0.005 wt %, an additive in an amount of 0.1 wt % or less, a remainder of iron (Fe), and other inevitable impurities; fine precipitates distributed inside the steel sheet, wherein the additive includes at least one of titanium (Ti), niobium (Nb), and vanadium (V), the fine precipitates include nitride or carbide of at least one of titanium (Ti), niobium (Nb), and vanadium (V), and traps hydrogen, and a mean diameter variation coefficient, which is a value obtained by dividing a standard deviation of a mean diameter of the fine precipitates by the mean diameter of the fine precipitates, is 0.7 or less.
An embodiment of the present invention discloses a hot-stamped part including: a base steel sheet; and a plated layer provided on the base steel sheet and including zinc (Zn), magnesium (Mg), silicon (Si), aluminum (Al), strontium (Sr), and the balance of iron (Fe) and other inevitable impurities, wherein the plated layer includes an alloying blocking layer, an intermediate alloy layer, and a corrosion resistance reinforcement layer which are sequentially stacked from the base steel sheet, and the corrosion resistance reinforcement layer includes an Sr-containing surface oxide layer.
C23C 28/00 - 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
96.
NON-ORIENTED ELECTRICAL STEEL SHEET AND METHOD FOR MANUFACTURING NON-ORIENTED ELECTRICAL STEEL SHEET
C21D 8/12 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
The present disclosure provides a material for hot stamping including: a steel sheet including carbon (C) in an amount of 0.19 to 0.25 wt %, silicon (Si) in an amount of 0.1 to 0.6 wt %, manganese (Mn) in an amount of 0.8 to 1.6 wt %, phosphorus (P) in an amount of 0.03 wt % or less, sulfur(S) in an amount of 0.015 wt % or less, chromium (Cr) in an amount of 0.1 to 0.6 wt %, boron (B) in an amount of 0.001 to 0.005 wt %, an additive in an amount of 0.1 wt % or less, a remainder of iron (Fe), and other inevitable impurities; fine precipitates distributed inside the steel sheet, wherein the additive includes at least one of titanium (Ti), niobium (Nb), and vanadium (V), the fine precipitates include nitride or carbide of at least one of titanium (Ti), niobium (Nb), and vanadium (V), the fine precipitates trap hydrogen, and a mean diameter variation coefficient, which is a value obtained by dividing a standard deviation of a mean diameter of the fine precipitates by the mean diameter of the fine precipitates, is 0.8 or less.
A non-oriented electrical steel sheet according to one embodiment of the present invention comprises 2.8-3.8 wt% of silicon (Si), 0.2-0.5 wt% of manganese (Mn), 0.5-1.5 wt% of aluminum (Al), 0.005 wt% or less of carbon (C), 0.005 wt% or less of sulfur (S), 0.015 wt% or less of phosphorus (P), 0.005 wt% or less of nitrogen (N), 0.005 wt% or less of titanium (Ti), 0.08 wt% or less of tin (Sn), 0.07 wt% or less of nickel (Ni), 0.07 wt% or less of copper (Cu) and the balance of iron (Fe) and other inevitable impurities, and has a secondary phase volume fraction, which is a particle size of 1.1 μm or more, of 50% or more, and thus can have excellent mechanical properties and magnetic properties.
C22C 38/08 - Ferrous alloys, e.g. steel alloys containing nickel
C22C 38/16 - Ferrous alloys, e.g. steel alloys containing copper
C21D 8/12 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
99.
NON-ORIENTED ELECTRICAL STEEL SHEET AND MANUFACTURING METHOD THEREFOR
A method for manufacturing a non-oriented electrical steel sheet, according to one embodiment of the present invention, comprises the steps of: (a) preparing steel that is a half-finished product comprising 2.5-3.8 wt% of silicon (Si), 1.45 wt% or more of nickel (Ni), 0.05 wt% or less of aluminum (Al) and the balance of iron (Fe) and other inevitable impurities; (b) hot rolling the steel, thereby forming a hot-rolled steel sheet; (c) cold rolling the hot-rolled steel sheet, thereby forming a cold-rolled steel sheet; and (d) cold roll annealing the cold-rolled steel sheet, wherein step (d) comprises the steps of: (d-1) increasing the temperature from room temperature to a first temperature at which austenite phase is stable, and then maintaining same for a first set time; (d-2) lowering the temperature to a second temperature at which a two-phase region where austenite phase and ferrite phase coexist is stable, and then maintaining same for a second set time; and (d-3) lowering the temperature to room temperature, and the phase transformation heat treatment in the cold rolling annealing step can improve the texture such that an orientation favorable to magnetism is developed, and can enhance magnetic properties.
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 38/02 - Ferrous alloys, e.g. steel alloys containing silicon
C22C 38/08 - Ferrous alloys, e.g. steel alloys containing nickel
C22C 38/06 - Ferrous alloys, e.g. steel alloys containing aluminium
According to one embodiment of the present invention, a non-oriented electrical steel sheet and a method for manufacturing the non-oriented electrical steel sheet can be provided, the non-oriented electrical steel sheet comprising 2.8-3.8 wt% of silicon (Si), 0.2-0.5 wt% of manganese (Mn), 0.5-1.5 wt% of aluminum (Al), 0.005 wt% or less of carbon (C), 0.005 wt% or less of sulfur (S), 0.015 wt% or less of phosphorus (P), 0.005 wt% or less of nitrogen (N), 0.005 wt% or less of titanium (Ti), 0.08 wt% or less of tin (Sn), 0.07 wt% or less of nickel (Ni), 0.07 wt% or less of copper (Cu) and the balance of iron (Fe) and other inevitable impurities, satisfying relation 1 and having high strength and high efficiency. [Relation 1] 3.0 < log T < 0.4 (T = 5*[S]+12*[Ti]+6*[P]+5*[Sn]+15*[Ni]+11*[Cu], wherein [S], [Ti], [P], [Sn], [Ni] and [Cu] represent the amounts (ppm) of S, Ti, P, Sn, Ni and Cu, respectively.)
C21D 8/12 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
