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发明申请
US20090297387A1 LOW SPECIFIC GRAVITY AND HIGH STRENGTH STEEL SHEETS WITH EXCELLENT RIDGING RESISTIBILITY AND MANUFACTURING METHODS THEREOF 有权
低特殊重量和高强度钢板，具有优异的耐冲击性和制造方法

  • 专利标题： LOW SPECIFIC GRAVITY AND HIGH STRENGTH STEEL SHEETS WITH EXCELLENT RIDGING RESISTIBILITY AND MANUFACTURING METHODS THEREOF
  • 专利标题（中）： 低特殊重量和高强度钢板，具有优异的耐冲击性和制造方法
  • 申请号： US12260144
    申请日： 2008-10-29
  • 公开(公告)号： US20090297387A1
    公开(公告)日： 2009-12-03
  • 发明人: Kwang Geun Chin , Jai Hyun Kwak
  • 申请人： Kwang Geun Chin , Jai Hyun Kwak
  • 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： KR10-2008-0049202 20080527
  • 主分类号： C22C38/06
  • IPC分类号： C22C38/06 ;  C21D8/02 ;  B21B37/74
LOW SPECIFIC GRAVITY AND HIGH STRENGTH STEEL SHEETS WITH EXCELLENT RIDGING RESISTIBILITY AND MANUFACTURING METHODS THEREOF
摘要：
A low specific gravity and high strength steel sheet includes C of 0.2% to 0.8%, Mn of 2% to 10%, P of 0.02% or less, S of 0.015% or less, Al of 3% to 15%, and N of 0.01% or less. A ratio of Mn/Al is 0.4 to 1.0. Retained austenite in a structure is included in the range of 1% or more. The steel sheet further includes one or two or more elements selected from the group consisting of Si of 0.1% to 2.0%, Cr of 0.1% to 0.3%, Mo of 0.05% to 0.5%, Ni of 0.1% to 2.0%, Cu of 0.1% to 1.0%, B of 0.0005% to 0.003%, Ti of 0.01% to 0.2%, Zr of 0.005% to 0.2%, Nb of 0.005% to 0.2%, W of 0.1% to 1.0%, Sb of 0.005% to 0.2%, and Ca of 0.001% to 0.2%.
摘要（中）：

低比重和高强度钢板包括C为0.2％至0.8％，Mn为2％至10％，P为0.02％以下，S为0.015％以下，Al为3％〜15％，N为 为0.01％以下。 Mn / Al的比例为0.4〜1.0。 结构中的残留奥氏体包含在1％以上的范围内。 钢板还含有选自0.1％〜2.0％的Si，0.1〜0.3％的Cr，0.05〜0.5％的Mo，0.1〜2.0％的Ni，0.1〜2.0％的Cu， 为0.1〜1.0％，B为0.0005〜0.003％，Ti为0.01〜0.2％，Zr为0.005〜0.2％，Nb为0.005〜0.2％，W为0.1〜1.0％，Sb为0.005 ％至0.2％，Ca为0.001％至0.2％。

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