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US 2020/0270732 A1Published application
METHOD FOR MANUFACTURING A METAL SHEET WITH A ZnAl COATING AND WITH OPTIMIZED WIPING, CORRESPONDING METAL SHEET, PART AND VEHICLE
AssigneeArcelorMittal
InventorsJean-Michel Mataigne, Didier Dauchelle, Florence Bertrand
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Abstract
A steel part includes a steel sheet substrate and a coating on at least one surface of the steel sheet 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 steel sheet substrate and the coating have at least one deformation. An outer surface of the coating has a waviness Wa0.8 of less than or equal to 0.43 μm.
Claims27
A steel part comprising:
- a steel sheet substrate;
- and
- a coating on at least one surface of the steel sheet substrate, the coating comprising between 0.2 and 0.7% by weight of Al, a remainder of the metal coating being Zn and inevitable impurities;
- the steel sheet substrate and the coating having at least one deformation;
- an outer surface of the coating having a waviness Wa0.8 of less than or equal to 0.43 μm.
2 more elements
A method for manufacturing a steel part comprising:
- providing a steel sheet substrate;
- providing a coating on at least one surface of the steel sheet substrate, the coating comprising between 0.2 and 0.7% by weight of Al, a remainder of the metal coating being Zn and inevitable impurities;
- and
- deforming the steel sheet substrate and the coating to create at least one deformation;
- an outer surface of the coating after the deforming having a waviness Wa0.8 of less than or equal to 0.43 μm.
2 more elements
A method for manufacturing a steel part comprising:
- providing a steel sheet substrate to be deformed into a preselected shape including at least one deformation;
- providing a coating on at least one surface of the steel sheet substrate, the coating comprising between 0.2 and 0.7% by weight of Al, a remainder of the metal coating being Zn and inevitable impurities, and controlling the providing of the coating to have a pre-deformation waviness Wa0.8 less than or equal to a certain value;
- and
- deforming the steel sheet substrate and the coating into the preselected shape;
- an outer surface of the coating after the deforming having a post-deformation waviness Wa0.8 of less than or equal to 0.43 μm.
2 more elements
Dependencies are inferred from the claim text.