| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for producing an aluminum plated steel sheet, a galvanized steel sheet or an aluminum-zinc plated steel sheet excellent in high temperature formability and hydrogen-brittleness resistance with which this steel sheet is used for a member, as a typical example, a structural member of car parts needed to the strength and produced with a high temperature press and after high temperature formation, the strength having≥1200 MPa can be obtained. SOLUTION: The method for producing the steel sheet for hot press, is performed as the followings, by which in the case of annealing the steel sheet containing 0.1-0.5 mass% C, after annealing at 660°C-Ac<SB>3</SB>point under atmosphere having≤15% hydrogen concentration and≤0°C dew point, the plating mainly containing aluminum or zinc is applied and diffusible hydrogen in the steel is made to be≤0.3 ppm. COPYRIGHT: (C)2006,JPO&NCIPI
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