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US 10,500,620 B2Granted
Method for manufacturing parts with a low waviness from an electrogalvanized metal sheet, corresponding part and vehicle
AssigneeArcelorMittal
InventorHervé Derule
Life of this patent
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Abstract
A method for manufacturing parts is provided. The method includes cold rolling a substrate with work cylinders whose work surface has a roughness Ra2.5 of less than or equal to 3.6 μm, depositing the metal coating on at least one face of the annealed substrate by electrodeposition to form the metal sheet and deforming the cut metal sheet to form the parts. The outer surface of the metal coating has a waviness Wa0.8 of less than or equal to 0.5 μm after the deformation step. A part and vehicle are also provided.
Claims13
A method for manufacturing parts made from a metal sheet comprising the steps of:
- providing a substrate;
- cold rolling the substrate, at least a last cold rolling pass being done with work cylinders whose work surface have a roughness Ra2.5 of less than or equal to 3.6 μm;
- recrystallization annealing of the cold rolled substrate;
- skin-pass rolling the annealed substrate;
- depositing a zinc-based metal coating on at least one face of the substrate by electrodeposition to form a metal sheet;
- cutting the metal sheet;
- and
- deforming the cut metal sheet to form parts, an outer surface of the metal coating having a waviness Wa0.8 of less than or equal to 0.5 μm after the deformation step.
5 more elements
Dependencies are inferred from the claim text.