![高强度冷轧钢板及其制造方法](/CN/2014/8/9/images/201480045268.jpg)
基本信息:
- 专利标题: 高强度冷轧钢板及其制造方法
- 申请号:CN201480045268.5 申请日:2014-07-18
- 公开(公告)号:CN105492643B 公开(公告)日:2018-04-10
- 发明人: 高岛克利 , 小野义彦 , 长谷川浩平
- 申请人: 杰富意钢铁株式会社
- 申请人地址: 日本东京
- 专利权人: 杰富意钢铁株式会社
- 当前专利权人: 杰富意钢铁株式会社
- 当前专利权人地址: 日本东京
- 代理机构: 中原信达知识产权代理有限责任公司
- 代理人: 鲁雯雯; 金龙河
- 优先权: 2013-165772 2013.08.09 JP
- 国际申请: PCT/JP2014/003826 2014.07.18
- 国际公布: WO2015/019558 JA 2015.02.12
- 进入国家日期: 2016-02-15
- 主分类号: C22C38/00
- IPC分类号: C22C38/00 ; C21D9/46 ; C22C38/06 ; C22C38/58
Provided are a high-strength cold-rolled steel sheet having excellent elongation, excellent stretch flangeability, and high yield ratio and a method for manufacturing the same. The high-strength cold-rolled steel sheet has a composition and a microstructure. The composition contains 0.15% to 0.27% C, 0.8% to 2.4% Si, 2.3% to 3.5% Mn, 0.08% or less P, 0.005% or less S, 0.01% to 0.08% Al, and 0.010% or less N on a mass basis, the remainder being Fe and inevitable impurities. The microstructure comprises: ferrite having an average grain size of 5 µm or less and a volume fraction of 3% to 20%, retained austenite having a volume fraction of 5% to 20%, and martensite having a volume fraction of 5% to 20%, the remainder being bainite and/or tempered martensite. The total number of retained austenite with a grain size of 2 µm or less, martensite with a grain size of 2 µm or less, or a mixed phase thereof is 150 or more per 2,000 µm 2 of a thickness cross section parallel to the rolling direction of the steel sheet.
公开/授权文献:
- CN105492643A 高强度冷轧钢板及其制造方法 公开/授权日:2016-04-13
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 |