发明申请

  • 专利标题: HIGH STRENGTH THIN STEEL SHEET FOR THE SUPERIOR PRESS FORMABILITY AND SURFACE QUALITY AND GALVANIZED STEEL SHEET AND METHOD FOR MANUFACTURING THE SAME
  • 专利标题(中): 高强度可压力和表面质量和优质钢板的高强度薄钢板及其制造方法
  • 申请号: US12989214
    申请日: 2008-09-01
  • 公开(公告)号: US20110030857A1
    公开(公告)日: 2011-02-10
  • 发明人: Jai Hyun KwakKwang Geun Chin
  • 申请人: Jai Hyun KwakKwang Geun Chin
  • 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: KR10-2008-0046100 20080519
  • 国际申请: PCT/KR08/05130 WO 20080901
  • 主分类号: C22C38/02
  • IPC分类号: C22C38/02 C21D8/02
HIGH STRENGTH THIN STEEL SHEET FOR THE SUPERIOR PRESS FORMABILITY AND SURFACE QUALITY AND GALVANIZED STEEL SHEET AND METHOD FOR MANUFACTURING THE SAME
摘要:
A high strength thin steel sheet that is mainly used for structural members and inner and outer panels for a vehicle, a galvanized steel sheet, and methods of manufacturing the same. The high strength thin steel sheet for superior press formability includes, by weight percent, 0.06 to 0.4% C, 1.0 to 5.0% Mn, 0.05 to 2.5% Si, 0.01 to 2.0% Ni, 0.02 to 2% Cu, 0.01 to 0.04% Ti, 0.05 to 2.5% Al, 0.005 to 0.1% Sb, 0.0005 to 0.004% B, 0.007% or less N, and balance Fe and inevitable impurities, and meeting relation of Ni+0.5×Mn+0.3×Cu>0.9, which is defined as Ni*, and Al/Ni*
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