| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a plated steel sheet for hot press which has excellent strength, formability, corrosion resistance and delayed fracture resistance, and a method for producing the same. <P>SOLUTION: The steel sheet for hot press has a composition comprising 0.1 to 0.5% C, 0.05 to 2% Si, 0.1 to 3% Mn, and one or more kinds selected from 0.005 to 1% Ti, 0.01 to 1% Nb, 0.01 to 1% V, 0.01 to 1% Mo, 0.005 to 1% W, 0.005 to 0.1% Zr, 0.01 to 3% Cu, 0.005 to 0.5% Y, 0.005 to 1% Mg, 0.005 to 0.1% La and 0.005 to 0.1% Ce, and in the steel sheet, plating essentially composed of aluminum or zinc is applied to its surface, and the content of hydrogen in the steel sheet satisfies the relation of Hmax-Ht≥0.07 ppm. In the formula, Hmax denotes the maximum content of non-diffusible hydrogen in which the steel sheet can be trapped, and Ht denotes the content of non-diffusible hydrogen trapped into the steel sheet after the plating. <P>COPYRIGHT: (C)2012,JPO&INPIT |
