发明申请
- 专利标题： LOW-YIELD-RATIO HIGH-STRENGTH HOT-ROLLED STEEL PLATE WITH EXCELLENT LOW-TEMPERATURE TOUGHNESS AND PROCESS FOR PRODUCING SAME
- 专利标题（中）： 具有优异低温韧性的低合金高强度热轧钢板及其生产方法
-
申请号： US14131793申请日： 2012-06-13
-
公开(公告)号： US20140290807A1公开(公告)日： 2014-10-02
- 发明人: Sota Goto , Hiroshi Nakata , Chikara Kami , Toshifumi Abe , Takato Tamai
- 申请人： Sota Goto , Hiroshi Nakata , Chikara Kami , Toshifumi Abe , Takato Tamai
- 申请人地址： JP Chiyoda-ku, Tokyo
- 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 Chiyoda-ku, Tokyo
- 优先权： JP2011-158509 20110720
- 国际申请： PCT/JP2012/065671 WO 20120613
- 主分类号： C22C38/58
- IPC分类号： C22C38/58 ; C22C38/54 ; C22C38/50 ; C22C38/48 ; C22C38/00 ; C22C38/44 ; C22C38/42 ; C22C38/06 ; C22C38/04 ; C22C38/02 ; C21D8/02 ; C22C38/46
摘要：
A low yield ratio and high-strength hot rolled steel sheet having a composition containing, on a mass percent basis, 0.03% to 0.10% C, 0.10% to 0.50% Si, 1.4% to 2.2% Mn, 0.005 % to 0.10% Al, 0.02% to 0.10% Nb, 0.001% to 0.030% Ti, 0.05% to 0.50% Mo, 0.05% to 0.50% Cr, and 0.01% to 0.50% Ni, in which Moeq preferably satisfies the range of 1.4% to 2.2%; and a microstructure including a main phase that contains bainitic ferrite having an average grain size of 10 μm or less and a secondary phase that contains massive martensite having an aspect ratio of less than 5.0 in an area ratio of 1.4% to 15%.
信息查询
