| 摘要 |
PROBLEM TO BE SOLVED: To provide a hot stamp molded body excellent in maximum tensile strength of 1180 MPa or more and hydrogen embrittlement resistance and to provide its manufacturing method.SOLUTION: There is provide a hot stamp molded body excellent in maximum tensile strength of 1180 MPa or more and hydrogen embrittlement resistance in which a structure of a steel plate containing, by mass%, C:0.12 to 0.40%, Si:0.005 to 2.0%, Mn+Cr:1 to 3%, Al:0.005 to 1.0%, P:0.001 to 0.030%, S:0.0001 to 0.01%, B:0.0003 to 0.010%, O:0.0001 to 0.007%, N:0.001 to 0.007% contains tempered martensite of 50% or more as an area ratio, a component of iron-based carbide contains Si or Al of total 0.05% or more as along or combination and the number density is 1×10/mmor more, and there is also provided a manufacturing method of the hot stamp molded body. |
