| 摘要 |
<p>This hot stamp molded article has a component composition that contains, in mass%, 0.002-0.1% of C, 0.01-0.5% of Si, 0.5-2.5% of Mn + Cr, 0.1% or less of P, 0.01% or less of S, 0.05% or less of t-Al and 0.005% or less of N, while additionally containing 0.0005-0.004% of B in cases where Mn + Cr is 1.0% or more, with the balance made up of Fe and unavoidable impurities. This hot stamp molded article has a metal structure that is composed of, in terms of the area ratio, 0% or more but less than 90% of martensite, 10-100% of bainite and less than 0.5% of unavoidable inclusion structures, or a metal structure that is composed of, in terms of the area ratio, 99.5-100% of bainitic ferrite and less than 0.5% of unavoidable inclusion structures.</p> |
