发明申请
- 专利标题: STEEL SHEET FOR CROWN CAP, METHOD FOR MANUFACTURING SAME, AND CROWN CAP
- 专利标题(中): 冠帽的钢板,制造方法和冠帽
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申请号: US15121540申请日: 2015-02-13
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公开(公告)号: US20160362761A1公开(公告)日: 2016-12-15
- 发明人: Tomonari HIRAGUCHI , Katsumi KOJIMA , Hiroki NAKAMURA , Masami TSUJIMOTO , Toshihiro KIKUCHI
- 申请人: JFE STEEL CORPORATION
- 申请人地址: JP 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 Tokyo
- 优先权: JP2014-033851 20140225
- 国际申请: PCT/JP2015/000684 WO 20150213
- 主分类号: C21D9/46
- IPC分类号: C21D9/46 ; C22C38/06 ; C22C38/04 ; B65D41/12 ; C22C38/00 ; C21D8/02 ; C23G1/00 ; C22C38/12 ; C22C38/02
摘要:
A steel sheet for crown caps includes C: 0.0005 to 0.0050%, Si: 0.020% or less, Mn: 0.10 to 0.60%, P: 0.020% or less, S: 0.020% or less, Al: 0.01 to 0.10%, N: 0.0050% or less, Nb: 0.010 to 0.050%, and Fe and inevitable impurities. The steel sheet has an average r value of 1.30 or more and a YP of 450 MPa or more and 650 MPa or less. The steel sheet is obtained by hot rolling a steel slab at a slab reheating temperature of 1,150° C. or higher and a finishing temperature of 870° C. or higher; coiling the hot rolled steel sheet at a coiling temperature of 600° C. or higher, performing pickling; then-performing primary cold rolling; performing annealing at an annealing temperature of recrystallization temperature or more and 790° ° C. or less; and performing secondary cold rolling at a rolling reduction of 10% or more and 50% or less.
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