Hot-stamp formed body
AssigneeNippon Steel Corporation
InventorsShota HAYASHIDA, Takuya MITSUNOBU, Hiroshi TAKEBAYASHI
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Abstract
Provided is a hot-stamp formed body comprising a steel base material and a plating layer arranged on a surface of the steel base material, wherein the plating layer has a predetermined chemical composition, a mean C concentration from a surface of the steel base material down to 1 μm in a depth direction is 0.25 mass % or less, the steel base material comprises, by area ratio, martensite at 90% or more, the plating layer includes an η-Zn phase, an amount of deposition of the plating layer is 50 g/m2 or more per surface, and the Vickers hardness is 400 HV or more.
Claims6
A hot-stamp formed body comprising a steel base material and a plating layer arranged on a surface of the steel base material, wherein
- the plating layer has a chemical composition comprising, by mass %,
- Al:
- 5.0 to 80.0%,
- Si:
- 0 to 15.0%, and
- Fe:
- 15.0 to 70.0%,
- further comprising at least one of
- Mg:
- 0 to less than 0.500%,
- Ni:
- 0 to less than 0.500%,
- Ca:
- 0 to 3.000%,
- Sb:
- 0 to 0.500%,
- Pb:
- 0 to 0.500%,
- Cu:
- 0 to 1.000%,
- Sn:
- 0 to 1.000%,
- Ti:
- 0 to 1.000%,
- Cr:
- 0 to 1.000%,
- Nb:
- 0 to 1.000%,
- Zr:
- 0 to 1.000%,
- Mn:
- 0 to 1.000%,
- Mo:
- 0 to 1.000%,
- Ag:
- 0 to 1.000%,
- Li:
- 0 to 1.000%,
- La:
- 0 to 0.500%,
- Ce:
- 0 to 0.500%,
- B:
- 0 to 0.500%,
- Y:
- 0 to 0.500%,
- Sr:
- 0 to 0.500%,
- In:
- 0 to 0.500%,
- Co:
- 0 to 0.500%,
- Bi:
- 0 to 0.500%,
- P:
- 0 to 0.500%, and
- W:
- 0 to 0.500% in a total of 5.000% or less, and
- balance:
- Zn and impurities,
- a mean C concentration from a surface of the steel base material down to 1 μm in a depth direction is 0.25 mass % or less,
- the steel base material comprises, by area ratio, martensite at 90% or more,
- the plating layer includes an η-Zn phase,
- an amount of deposition of the plating layer is 50 g/m2 or more per surface, and
- the Vickers hardness is 400 HV or more.
Dependencies are inferred from the claim text.