Zinc-plated steel sheet for hot stamping and production method therefor
AssigneeKobe Steel, Ltd.
InventorsTakatoshi Yoshida, Yosuke Ukawa
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Abstract
A zinc-plated steel sheet for hot stamping according to an aspect of the present invention includes a steel substrate and a plated layer provided on a surface of the steel substrate, in which the steel substrate contains, in % by mass, C: 0.10 to 0.5%, Si: 0.7 to 2.5%, Mn: 1.0 to 3%, and Al: 0.01 to 0.5%, with the balance being iron and inevitable impurities, and the steel substrate has, in the inside thereof, an internal oxide layer consists of an oxide containing at least one of Si and Mn having a thickness of 1 μm or more, and a decarburized layer having a thickness of 20 μm or less from an interface with the plated layer toward an internal direction of the steel substrate.
Claims3
A zinc-plated steel sheet for hot stamping, comprising:
- a steel substrate;
- and
- a plated layer provided on a surface of the steel substrate,
- wherein the steel substrate comprises, in % by mass relative to a total mass of the steel substrate:
- C:
- 0.10 to 0.5%,
- Si:
- 0.7 to 2.5%,
- Mn:
- 1.0 to 3%, and
- Al:
- 0.01 to 0.5%,
- wherein the steel substrate comprises an internal oxide layer and a decarburized layer,
- wherein the internal oxide layer comprises an oxide of at least one selected from the group consisting of Si and Mn and has a thickness of at least 1 μm,
- wherein the decarburized layer has a thickness of 20 μm or less from an interface with the plated layer toward an internal direction of the steel substrate,
- wherein the internal oxide layer is a layer formed inside the steel substrate and near a steel substrate surface and the internal oxide layer does not appear on the steel substrate surface,
- wherein an oxide film containing oxides of Si is not formed on the steel substrate surface.
Dependencies are inferred from the claim text.