Rustproof steel sheet and method for manufacturing the same
AssigneeJfe Steel Corporation
InventorsYoshiharu Sugimoto, Sakae Fujita
Life of this patent
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Abstract
A rustproof steel sheet includes an organic and/or inorganic coating layer on at least one side thereof, the thickness of the coating layer in a portion where spot welding is performed being smaller than that of the coating layer in a portion where spot welding is not performed, and a method for manufacturing the rustproof steel sheet. Since the rustproof steel sheet has sufficiently low electric resistance at a weld spot and a satisfactory weld spot can be formed, the rustproof steel sheet has both spot weldability and corrosion resistance.
Claims10
1-5. (canceled)
A rustproof steel sheet comprising:
- 0
- a steel sheet;
- and
- an organic and/or inorganic coating layer formed on at least one side of the steel sheet that provides rustproofing,
- wherein thickness of the coating layer in at least one portion of the steel sheet subjected to spot welding is smaller than in portions not subjected to spot welding.
A method for manufacturing a rustproof steel sheet comprising:
- obtaining information about a position where spot welding is performed from a steel sheet user;
- and
- controlling the thickness of an organic and/or inorganic coating layer in at least one portion where spot welding is performed, on the basis of the obtained information.
Dependencies are inferred from the claim text.