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US 12,606,898 B2Granted
Coated metal part obtained by deformation of a coated metal sheet
AssigneeArcelorMittal
InventorsJean-Michel Mataigne, Didier Dauchelle, Florence Bertrand
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Abstract
A coated metal sheet includes a steel substrate and a coating on at least one surface of the steel substrate. The coating includes between 0.2 and 0.7% by weight of Al, with a remainder of the metal coating being Zn and inevitable impurities. The coated metal sheet was subjected to a skin pass operation after coating. An outer surface of the metal coating has a waviness Wa0.8 of less than or equal to 0.55 μm.
Claims13
A coated metal part obtained by deformation of a coated metal sheet comprising:
- a steel substrate having at least one face;
- and
- a metal coating on the at least one face of the steel substrate, the metal coating being deposited by dipping the steel substrate in a dip bath;
- the metal coating comprising between 0.2 and 0.7% by weight of Al, a remainder of the metal coating being Zn and inevitable impurities,
- wherein the coated metal sheet was subjected to a skin pass operation after coating and then to a deformation operation to obtain the coated metal part, wherein an outer surface of the metal coating of the coated metal sheet has a waviness Wa0.8 of less than or equal to 0.55 μm after the skin pass operation and before the deformation operation, and an outer surface of the metal coating of the coated metal part has a waviness Wa0.8 of less than or equal to 0.41 μm after the deformation operation.
2 more elements
Dependencies are inferred from the claim text.