EP2138599B1 HIGH-STRENGTH HOT-DIP GALVANIZED STEEL SHEET AND METHOD FOR PRODUCING THE SAME
失效 - 权利终止
基本信息:
- 专利标题： HIGH-STRENGTH HOT-DIP GALVANIZED STEEL SHEET AND METHOD FOR PRODUCING THE SAME
- 申请号：EP08740312.7 申请日：2008-04-07
- 公开(公告)号：EP2138599B1 公开(公告)日：2018-11-14
- 发明人： TAKAGI, Shusaku , KAWABE, Hidetaka , HASEGAWA, Kohei , OOI, Toshihiko , OKITA, Yasuaki , SAKURAI, Michitaka
- 申请人： JFE Steel Corporation
- 申请人地址： 2-3, Uchisaiwaicho 2-chome Chiyoda-ku Tokyo 100-0011 JP
- 专利权人： JFE Steel Corporation
- 当前专利权人： JFE Steel Corporation
- 当前专利权人地址： 2-3, Uchisaiwaicho 2-chome Chiyoda-ku Tokyo 100-0011 JP
- 代理机构： Haseltine Lake LLP
- 优先权： JP2007106250 20070413; JP2008044833 20080226
- 国际公布： WO2008133062 20081106
- 主分类号： C22C38/38
- IPC分类号： C22C38/38 ; C21D8/02 ; C21D9/46 ; C23C2/06 ; C23C2/28 ; C22C38/00 ; C22C38/22 ; C22C38/02 ; C22C38/28 ; C22C38/26 ; C22C38/32 ; C22C38/06 ; C21D6/00 ; C21D8/04 ; C23C2/02 ; C21D9/48
摘要：
A high tensile-strength galvanized steel sheet, comprising: C: at least 0.05% but less than 0.12%, Si: at least 0.01% but less than 0.35%, Mn: 2.0% to 3.5%, P: 0.001% to 0.020%, S: 0.0001% to 0.0030%, Al: 0.005% to 0.1%, N: 0.0001% to 0.0060%, Cr: more than 0.5% but not more than 2.0%, Mo: 0.01% to 0.50%, Ti: 0.010% to 0.080%, Nb: 0.010% to 0.080%, and B: 0.0001% to 0.0030%, the remainder being Fe and unavoidable impurities, wherein the high tensile-strength galvanized steel sheet has a microstructure that contains 20% to 70% by volume ferrite having an average grain size of 5 µm or less. The high tensile-strength galvanized steel sheet has a tensile strength of at least 980 MPa, and excellent formability and weldability.
公开/授权文献:
IPC结构图谱:
| C | 化学；冶金 |
| --C22 | 冶金（铁的冶金入C21）；黑色或有色金属合金；合金或有色金属的处理 |
| ----C22C | 合金 |
| ------C22C38/00 | 铁基合金，例如合金钢 |
| --------C22C38/18 | .含铬的 |
| ----------C22C38/38 | ..含大于1.5（重量）的锰 |