| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for manufacturing a high-strength formed body superior in formability and crushing characteristics, which stably manufactures the high-strength formed body that has been conventionally manufactured by a tailored blank method. SOLUTION: This method comprises press-forming a steel sheet superior in strain age hardenability, and then partially heat-treating it in order to impart it the followingΔHv of 30 or higher andΔHv/t of 10 or less:ΔHv=Hv1-Hv2, wherein Hv1 is hardness (Vickers hardness) of a heat-treated part (part B); Hv2 is hardness (Vickers hardness) of a non-heat-treated part(part A); "t" is a width (mm) of a hardness transition zone, which is a width of a zone where the hardness changes from Hv1 to Hv2. COPYRIGHT: (C)2004,JPO
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