发明申请
- 专利标题: WEATHER-RESISTANT HOT-ROLLED STEEL SHEET SUPERIOR HIGH-STRENGTH, AND MANUFACTURING METHOD
- 专利标题(中): 耐高温热轧钢板超高强度和制造方法
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申请号: US12520104申请日: 2007-12-18
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公开(公告)号: US20100092331A1公开(公告)日: 2010-04-15
- 发明人: Kee Jo Jeong , Gyo Sung Kim , Jai Ik Kim , Chul Ju Park , Jae Kon Lee
- 申请人: Kee Jo Jeong , Gyo Sung Kim , Jai Ik Kim , Chul Ju Park , Jae Kon Lee
- 申请人地址: KR Pohang
- 专利权人: POSCO
- 当前专利权人: POSCO
- 当前专利权人地址: KR Pohang
- 优先权: KR10-2006-0133110 20061222
- 国际申请: PCT/KR2007/006633 WO 20071218
- 主分类号: C22C38/42
- IPC分类号: C22C38/42 ; C22C38/02 ; C22C38/04 ; C22C38/58 ; C22C38/14 ; C22C38/50 ; C22C38/48 ; C22C38/12 ; C22C38/44 ; B21B23/00 ; B21D11/14
摘要:
There are provided a high-strength hot-rolled steel sheet having excellent weather resistance used for containers and a method of manufacturing the same. A high-strength hot-rolled steel sheet having excellent weather resistance includes, by weight: C: 0.05 to 0.07%, Mn: 2.5% or less, Nb: 0.04 to 0.06%, Ti: 0.08 to 0.10%, Cu: 0.30 to 0.60%, Cr: 0.5 to 1.0%, and Ni: 0.15 to 0.30%, and the balance of Fe and other inevitable impurities. A method of manufacturing the hot-rolled steel sheet is also provided. A hot-rolled steel sheet provided has weather resistance by addition of Cu, Cr, and Ni and material characteristics of a tensile strength within the range of 800 to 900 MPa and a yield strength within the range of 700 to 800 MPa.
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