首页> 外国专利> HIGH STRENGTH COLD-ROLLED STEEL SHEET EXCELLENT IN BALANCE BETWEEN ELONGATION AND STRETCH-FLANGEABILITY AND MANUFACTURING METHOD THEREFOR

HIGH STRENGTH COLD-ROLLED STEEL SHEET EXCELLENT IN BALANCE BETWEEN ELONGATION AND STRETCH-FLANGEABILITY AND MANUFACTURING METHOD THEREFOR

机译：高强度冷轧钢板的延伸，拉伸-延展性和制造方法之间的平衡非常出色

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摘要

PROBLEM TO BE SOLVED: To provide a high strength cold-rolled steel sheet, improving a balance between elongation and stretch-flangeability and to provide a method for manufacturing the same.;SOLUTION: The cold-rolled steel sheet has a composition composed by mass% of 0.10-0.25% C, 0.90-2.40% Si, 1.50-2.50% Mn, 0.10-0.80% Al, ≤0.050% (including 0%) P. ≤0.050% (including 0%) S, ≤(including 0% ) N, ≤0.0100% (including 0%) Ca and the balance Fe with inevitable impurities; furthermore, T_γ50 (°C) following formula (1) T_γ50 =816.5-101.5√[C]+36.9[Si]-20.35[Mn]+200[Al], is 835-950°C, and the ferrite (α) area ratio is 25-75%, the balance is composed of a tempered martensite (M), a contacting ratio of the same α group is ≤0.25, an M/α strength ratio is ≤4 and an existing ratio of cementite particles having ≥0.1 μm circular-corresponding diameter in the above M is ≤500 pieces/mm². Wherein, [C], [Si], [Mn] and [Al], are respectively meant as the respective contents (mass%) of C, Si, Mn and Al.;COPYRIGHT: (C)2011,JPO&INPIT

机译：解决的问题：提供高强度的冷轧钢板，改善伸长率和拉伸凸缘性之间的平衡，并提供制造该方法的方法。;解决方案：该冷轧钢板具有由质量组成的组成0.10-0.25％C，0.90-2.40％Si，1.50-2.50％Mn，0.10-0.80％Al，0.050％（包括0％）P，0.050％（包括0％）S，％（含0％）N，0.0100％（含0％）Ca和余量的Fe具有不可避免的杂质;此外，T _{＆γ; 50 （℃）遵循式（1）T _{＆γ; 50 = 816.5-101.5＆radic; [C] +36.9 [Si] -20.35 [Mn] +200 [Al]为835-950℃，铁素体（α）的面积比为25-75％，其余部分由回火马氏体（M）组成，接触率相同;组为＆le; 0.25，M /＆alpha;强度比为4，上述M中的圆形对应直径为0.1μm的渗碳体粒子的存在比为500个/ mm ^{2 。其中，[C]，[Si]，[Mn]和[Al]分别表示C，Si，Mn和Al的各自含量（质量％）。版权所有：（C）2011，JPO＆INPIT}}}

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公开/公告号JP2011162813A

专利类型
公开/公告日2011-08-25

原文格式PDF
申请/专利权人 KOBE STEEL LTD;
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申请/专利号JP20100024228
发明设计人 HATAKE HIDEO;MURAKAMI TOSHIO;KAKIUCHI ELIJAH;
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申请日2010-02-05
分类号C22C38/00;C22C38/06;C21D9/46;B21B3/00;
国家 JP
入库时间 2022-08-21 18:24:59

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