Steel sheet for hot pressing and method of manufacturing hot-pressed part using steel sheet for hot pressing
AssigneeJfe Steel Corporation
InventorsSeiji Nakajima, Tatsuya Miyoshi, Hiroki Nakamaru
Life of this patent
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Abstract
In order to provide a steel sheet for hot pressing from which a hot-pressed part excellent in perforation corrosion resistance is obtainable and a method of manufacturing a hot-pressed part using the steel sheet for hot pressing, provided is a steel sheet for hot pressing having, sequentially on a surface of a base steel sheet: a plating layer I containing 60% by mass or more of Ni and the remainder consisting of Zn and inevitable impurities, a coating mass thereof being 0.01 to 5 g/m2; and a plating layer II containing 10 to 25% by mass of Ni and the remainder consisting of Zn and inevitable impurities, a coating mass thereof being 10 to 90 g/m2.
Claims20
A steel sheet for hot pressing, comprising on a surface of a base steel sheet:
- a plating layer I on the surface of the base steel sheet comprising (i) 60% by mass or more of Ni and (ii) a remainder comprising Zn and inevitable impurities, a coating mass thereof being 0.01 to 5 g/m2;
- and
- a plating layer II on the plating layer I comprising (i) 10 to 25% by mass of Ni and (ii) a remainder comprising Zn and inevitable impurities, a coating mass thereof being 10 to 90 g/m2.
Dependencies are inferred from the claim text.