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The high intensity cold rolling steel sheet and its production manner and is superior in the product configuration the part null mass for the automobile which are superior in rectangular pipe diaphragm compactibility
The high intensity cold rolling steel sheet and its production manner and is superior in the product configuration the part null mass for the automobile which are superior in rectangular pipe diaphragm compactibility
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机译：高强度冷轧钢板及其生产方式，在产品结构上具有矩形管隔膜紧凑性优异的汽车零件零质量
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摘要
PROBLEM TO BE SOLVED: To provide a high-strength cold-rolled steel sheet having excellent square tube drawability and shape fixability even in high strength satisfying TS of ≥440 MPa.;SOLUTION: The steel sheet has a composition where, in constitution components, particularly, regarding Mn, Mo, Cr and V, the range in formula M=[%Mn]+3[%Mo]+1.3[%Cr]+0.5[%V]≥2 is satisfied, and further has a steel structure composed of a mixed structure essentially composed of a ferritic phase, and comprising a martensitic phase of ≤15% by volume fraction. Further, the r value (rD) in a direction forming 45° with the rolling direction is ≥1.2, and also, regarding in-plane anisotropy (Δr value) shown by the following formula, the range of -1.0≤Δr value≤-0.3 is satisfied (wherein, Δr value=(rL-2×rD+rC)/2).;COPYRIGHT: (C)2009,JPO&INPIT
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机译：要解决的问题：提供一种即使在满足440 MPa以上的TS的高强度下也具有优异的方管拉伸性和形状固定性的高强度冷轧钢板。解决方案：钢板具有组成上的组成成分尤其是关于Mn，Mo，Cr和V，满足式M ＝ [％Mn] +3 [％Mo] +1.3 [％Cr] +0.5 [％V]＆ge; 2的范围，并且还具有由基本上由铁素体相组成且马氏体相的体积分数为15％的混合组织组成的钢结构。此外，在形成45°的方向上的r值（r D ）被限定为0。另外，关于下方向所示的面内各向异性（Δr值），滚压方向为＆ge; 1.2，并且，满足-1.0＆Δr值＆-0.3的范围（其中，＆ r value =（r L -2＆times; r D + r C ）/ 2）.;版权：（C）2009，JPO＆INPIT
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