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HIGH STRENGTH STEEL SHEET HAVING HIGH BAKING HARDENABILITY ON APPLICATION OF HIGH PRESTRAIN, AND PRODUCTION METHOD THEREFOR
HIGH STRENGTH STEEL SHEET HAVING HIGH BAKING HARDENABILITY ON APPLICATION OF HIGH PRESTRAIN, AND PRODUCTION METHOD THEREFOR
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机译:具有高烘烤稳定性的高强度钢板在高强度前处理中的应用及其生产方法
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摘要
PROBLEM TO BE SOLVED: To provide a high strength steel sheet which has high baking hardenability on application of high prestrain where complicated shapes and safety in case of a collision are considered, and to provide a production method therefor.;SOLUTION: The high strength steel sheet has a composition containing, by mass, 0.0005 to 0.3% C, 0.001 to 3.0% Si, 0.01 to 3.0% Mn, 0.0001 to 0.05% Al, 0.001 to 0.3% P, 0.0001 to 0.1% S, and 0.0010 to 0.05% N, and the balance Fe with inevitable impurities, and has a structure where ferrite occupies as a phase having the maximum area ratio, and solid solution carbon: Sol.C and solid solution nitrogen: Sol.N in the ferrite satisfy 0.1 to 100, and in which, on application of prestrain in 5 to 20%, the average of yield strength and tensile strength or each value after baking treatment at 110 to 200°C for 1 to 60 min is ≥50 MPa.;COPYRIGHT: (C)2003,JPO
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