公开(公告)号：EP4269651A1

公开(公告)日：2023-11-01

申请号：EP21911379.2

申请日：2021-12-15

申请人： POSCO Co., Ltd

发明人： KWON, Minserk ,  CHUNG, Woncheol ,  SHIM, Hokyung ,  PARK, Changsoo ,  MIN, Seonghoon

IPC分类号： C23C22/07 ,  C23C22/74 ,  C22C38/02

摘要： A grain oriented electrical steel sheet according to an embodiment of the present invention comprises: an electrical steel sheet base comprising 2.0 to 7.0 weight% of Si and 0.01 to 0.07 weight% of Sb, and the remainder being Fe and other unavoidable impurities; a fine-grained interfacial layer positioned in a direction toward the inside of the electrical steel sheet base from the surface of the electrical steel sheet base; a base coating layer positioned on the fine-grained interfacial layer; and an insulating coating layer positioned on the base coating layer.
The grain oriented electrical steel sheet according to an embodiment of the present invention satisfies Formula 1 below. P × PS + F × FS + C × CS / − S / 2 ≥ 13.0 MPa (wherein [P] is thickness (µm) of the insulating coating layer, [PS] is residual stress (MPa) of the insulating coating layer, [F] is thickness (µm) of the base coating layer, [FS] is residual stress (MPa) of the base coating layer, [C] is thickness(µm) of the fine-grained interfacial layer, [CS] is residual stress (MPa) of the fine-grained interfacial layer, and [S] is thickness (µm) of the electrical steel sheet base)

公开(公告)号：EP4269515A1

公开(公告)日：2023-11-01

申请号：EP21911405.5

申请日：2021-12-16

申请人： POSCO Co., Ltd

发明人： HA, Bongwoo ,  KIM, Jungwoo ,  SEO, Kang ,  KANG, Daegyu ,  NO, Taeyoung ,  LEE, Donggyu ,  PARK, Gyeongryeol

IPC分类号： C09D175/04 ,  B05D7/14 ,  C09D7/40 ,  B32B37/12 ,  B32B15/01 ,  C09J175/04 ,  C09J5/06

摘要： The present invention relates to an electrical steel sheet and a laminate thereof, and provided is an electrical steel sheet including: an electrical steel sheet; and a polyurethane coating layer positioned on the electrical steel sheet, in which the rebound elastic modulus of the polyurethane coating layer is 5% to 30%.

公开(公告)号：EP4266560A1

公开(公告)日：2023-10-25

申请号：EP21911425.3

申请日：2021-12-17

申请人： POSCO Co., Ltd

发明人： KIM, Jungwoo ,  HA, Bongwoo ,  LEE, Donggyu ,  NO, Taeyoung ,  PARK, Gyeongryeol

IPC分类号： H02K15/02 ,  H02K15/12 ,  H01F27/245 ,  H01F41/02

摘要： The present disclosure relates to a method for manufacturing an electrical steel sheet laminate, the method comprising the steps of: preparing an electrical steel sheet strip including an adhesive layer; coating the strip with a fusion accelerator including a silane coupling agent, a curing agent, and a solvent; fabricating metal parts from the strip; and laminating the metal parts and attaching same to each other by compression.

公开(公告)号：EP4265814A1

公开(公告)日：2023-10-25

申请号：EP21907083.6

申请日：2021-12-15

申请人： POSCO Co., Ltd

发明人： LEE, Suk-Kyu ,  OH, Jong-Gi ,  KIM, Myung-Soo

IPC分类号： C23C2/12 ,  C23C2/02 ,  C23C2/40 ,  C22C38/04 ,  C22C38/06 ,  C21D9/46

摘要： The present invention relates to an aluminum coated steel sheet having excellent anti-corrosion properties and weldability, and a manufacturing method thereof. The aluminum coated steel sheet according to one aspect of the present invention includes: an austenitic base steel sheet including at least 70 area% of an austenite microstructure; and an aluminum coating layer formed on the base steel sheet, wherein the base steel sheet includes at least 80 area% of ferrite in a surface layer portion, which denotes a region extending from the interface with the coating layer to a depth of 100 µm into the base steel sheet, and the aluminum coating layer may have a composition comprising 2-12 wt% of Si, 5-30 wt% of Zn, and 0.1-5 wt% of Mn, with the balance being Al and inevitable impurities.

公开(公告)号：EP4265812A1

公开(公告)日：2023-10-25

申请号：EP21911434.5

申请日：2021-12-20

申请人： POSCO Co., Ltd

发明人： KIM, Tae-Chul ,  SOHN, Il-Ryoung ,  YOO, Bong-Hwan

IPC分类号： C23C2/06 ,  C23C2/20 ,  C23C2/26 ,  C23C2/02 ,  C23C2/40 ,  C21D8/02 ,  C22C18/00 ,  C22C38/00 ,  C23C2/28 ,  C21D1/76 ,  C21D9/46

摘要： The present invention relates to a plated steel sheet which can be used for automobiles, home appliances, building materials, etc. and a method for manufacturing same and, more particularly, to a zinc alloy plated steel sheet having excellent adhesion to an adhesive and a method for manufacturing same.

公开(公告)号：EP4265805A1

公开(公告)日：2023-10-25

申请号：EP21911317.2

申请日：2021-12-07

申请人： POSCO Co., Ltd

发明人： KANG, Ki-Cheol ,  KANG, Dae-Young ,  KIM, Nam-A ,  KIM, Myung-Soo

IPC分类号： C23C2/02 ,  C23C2/06 ,  C23C2/28 ,  C23C2/40 ,  C22C38/38 ,  C22C38/34 ,  C22C38/14 ,  C22C38/04 ,  C22C38/02 ,  C21D8/02

摘要： According to one aspect of the present invention, a high-strength hot-dip galvanized steel sheet having an excellent surface quality and spot weldability, and a manufacturing method therefor may be provided.

公开(公告)号：EP4265790A1

公开(公告)日：2023-10-25

申请号：EP21906845.9

申请日：2021-11-04

申请人： POSCO Co., Ltd

发明人： YU, Seng-Ho ,  CHO, Nam-Young

IPC分类号： C22C38/58 ,  C22C38/54 ,  C22C38/48 ,  C22C38/44 ,  C21D9/46 ,  C21D8/02

摘要： The present invention can provide armored steel and a method for manufacturing same, wherein the armored steel has excellent low-temperature impact toughness together with a high hardness property and as such, can provide excellent ferroelasticity.

公开(公告)号：EP4265785A1

公开(公告)日：2023-10-25

申请号：EP21906840.0

申请日：2021-11-04

申请人： POSCO Co., Ltd

发明人： YU, Seng-Ho ,  CHO, Nam-Young

IPC分类号： C22C38/58 ,  C22C38/54 ,  C22C38/48 ,  C22C38/44 ,  C21D9/46 ,  C21D8/02

摘要： The present invention can provide a bullet-proof steel capable of providing excellent bullet-proof properties by having high hardness characteristics and excellent low-temperature impact toughness, and a method for manufacturing same.

公开(公告)号：EP4265781A1

公开(公告)日：2023-10-25

申请号：EP21906924.2

申请日：2021-11-30

申请人： POSCO Co., Ltd

发明人： KONG, Jong-Pan ,  AHN, Yeon-Sang ,  RYU, Joo-Hyun

IPC分类号： C22C38/38 ,  C22C38/28 ,  C22C38/22 ,  C22C38/00 ,  C21D9/46 ,  C21D8/02

摘要： The present invention relates to an ultra-high-strength cold-rolled steel sheet having excellent yield strength and bending properties and a method for manufacturing same and, more particularly, to an ultra-high-strength cold-rolled steel sheet having excellent yield strength and bending properties, which can be used as a structural component for automobiles such as a member, a seat rail, and a pillar, and a method for manufacturing same.

公开(公告)号：EP4265766A1

公开(公告)日：2023-10-25

申请号：EP21907056.2

申请日：2021-12-14

申请人： POSCO Co., Ltd

发明人： CHUN, Youngsoo ,  LEE, Sang-yoon ,  CHOI, Seok-hwan ,  CHOI, Myungsoo

IPC分类号： C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/14 ,  C21D9/52 ,  C21D8/06

摘要： Disclosed are wire rods and parts with improved delayed fracture resistance, and methods for manufacturing the same. The wire rod with improved delayed fracture resistance according to the present disclosure contains, by wt%, 0.15-0.30% of C, 0.15-0.25% of Si, 0.95-1.35% of Mn, 0.030% or less of P, 0.030% or less of S, 0.015-0.030% of Ti, 0.0010-0.0040% of B, 0.0010-0.0080% of N, and Fe and inevitable impurities as the balance, and satisfies formula 1. 2.0 ≤ 5.5 × Si + Mn ≤ 2.4 (In formula 1, [Si] and [Mn] represent the contents (wt%) of the corresponding elements.)