发明公开
EP4403665A1 STEEL SHEET FOR HOT PRESSING, METHOD FOR PRODUCING STEEL SHEET FOR HOT PRESSING, HOT-PRESSED MEMBER, AND METHOD FOR PRODUCING HOT-PRESSED MEMBER
审中-实审
基本信息:
- 专利标题： STEEL SHEET FOR HOT PRESSING, METHOD FOR PRODUCING STEEL SHEET FOR HOT PRESSING, HOT-PRESSED MEMBER, AND METHOD FOR PRODUCING HOT-PRESSED MEMBER
- 申请号：EP22920452.4 申请日：2022-11-17
- 公开(公告)号：EP4403665A1 公开(公告)日：2024-07-24
- 发明人： SATO, Rinta , YAMAZAKI, Kazuhiko , MAKIMIZU, Yoichi , TANAKA, Minoru
- 申请人： JFE Steel Corporation
- 申请人地址： JP Tokyo 100-0011 2-3, Uchisaiwai-cho 2-chome Chiyoda-ku
- 专利权人： JFE Steel Corporation
- 当前专利权人： JFE Steel Corporation
- 当前专利权人地址： JP Tokyo 100-0011 2-3, Uchisaiwai-cho 2-chome Chiyoda-ku
- 代理机构： Haseltine Lake Kempner LLP
- 优先权： JP 22002599 2022.01.11
- 国际申请： JP2022042769 2022.11.17
- 国际公布： WO2023135932 2023.07.20
- 主分类号： C23C2/12
- IPC分类号： C23C2/12 ; C23C2/26 ; C23C2/28 ; C23C2/40 ; C23C28/00 ; C23C30/00 ; C21D1/18 ; C21D9/00 ; C22C21/02 ; C22C38/00 ; C22C38/60
摘要：
A steel sheet for hot press forming that can reduce diffusible hydrogen content introduced in hot press forming without controlling the atmosphere dew point, and may be used to obtain a hot pressed member that has excellent post-coating corrosion resistance. The steel sheet for hot press forming includes a base steel sheet and a coated layer on both sides of the base steel sheet. The coated layer has a chemical composition containing Si: 7 mass% to 11 mass%, Mg: 0.6 mass% to 1.9 mass%, one or both of Ca and Sr: in total, 1.0 % to 10 % of Mg in atomic concentration, and Fe: 0 mass% to 30 mass%, with the balance being Al and inevitable impurity. Concentration of Mg solute in Al phase in the coated layer is less than 1 mass%, and average thickness of the coated layer is 10 µm or more and 30 µm or less on each side of the base steel sheet.