Patent ID: 6538365
Filing Date: 2003-03-25
Classification: C23C,H01T

Abstract:
A method for manufacturing a metal member with chromate coat comprising:forming a chromate coat having a film thickness of 0.2 to 0.5 &mgr;m and composed of trivalent chromium at 95 mass % or more of chromium component contained at least on a surface of said metal member by immersing said metal member into a chromating bath; conducting the heat treatment of said chromate coat at temperatures from 85 to 255Â° C.; forming said chromate coat on an outside surface of said metal member containing a sliding expected surface, in which said sliding expected surface is defined as a surface of a caulking expected portion of said metal member that is expected to contact and slide with a caulking mold in caulking; and caulking said caulking expected portion after said heat treatment step.