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首页> 外国专利> High yield ratio and high-strength cold rolled thin steel sheet superior in weldability and ductility, high-yield ratio high-strength hot-dip galvanized cold rolled thin steel sheet, high-yield ratio high-strength hot-dip galvannealed cold rolled thin steel sheet, and methods of production of same

High yield ratio and high-strength cold rolled thin steel sheet superior in weldability and ductility, high-yield ratio high-strength hot-dip galvanized cold rolled thin steel sheet, high-yield ratio high-strength hot-dip galvannealed cold rolled thin steel sheet, and methods of production of same

机译：高屈服比高强度冷轧薄钢板，焊接性和延展性极佳，高屈服比高强度热浸镀锌冷轧薄钢板，高屈服比高强度热浸镀锌冷轧薄钢板片材及其制造方法

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摘要

High yield ratio high-strength thin steel sheet superior in weldability and ductility characterized by;being comprised of steel containing, by mass%, C: over 0.030 to less than 0.10%, Si: 0.30 to 0.80%, Mn: 1.7 to 3.2%, P: 0.001 to 0.02%, S: 0.0001 to 0.006%, Al: 0.060% or less, N: 0.0001 to 0.0070%, containing further Ti: 0.01 to 0.055%, Nb: 0.012 to 0.055%, Mo: 0.07 to 0.55%, B: 0.0005 to 0.0040%, and simultaneously statisfying 1.1≤14xTi (%) + 20xNb (%) + 3xMo (%) + 300xB (%) ≤3.7, the balance comprised of iron and unavoidable impurities, andhaving a yield ratio of 0.64 to less than 0.92, a TSxE1 of 3320 or more, an YRxTSxE11/2 of 2320 or more, and a maximum tensile strength (TS) of 780 MPa or more.
机译：具有优良的可焊性和延展性的高屈强比高强度薄钢板的特征在于;以质量％计，含有C：0.030以上且不足0.10％，Si：0.30〜0.80％，Mn：1.7〜3.2％，P：0.001〜0.02％，S：0.0001〜0.006％，Al： 0.060％以下，N：0.0001〜0.0070％，进一步含有Ti：0.01〜0.055％，Nb：0.012〜0.055％，Mo：0.07〜0.55％，B：0.0005〜0.0040％，同时满足1.1≤14xTi（％ ）+ 20xNb（％）+ 3xMo（％）+ 300xB（％）≤3.7，其余部分由铁和不可避免的杂质组成，以及具有0.64至小于0.92的屈服比，3320或更高的TSxE1、2320或更高的YRxTSxE1 1/2 以及最大拉伸强度（TS）为780MPa或更高。

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