Process for forming a coating of chromium and nitrogen having good wear resistance properties
AssigneeRiken
InventorMasaki Ooya
Life of this patent
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Abstract
A coating containing chromium and nitrogen is formed on the surface of a substrate. The chromium concentration of the coating is continuously and gradually increased from the substrate surface in a perpendicular direction toward the surface of the coating. A coating having good wear resistance and initial conformability is obtained.
Claims1
A method of providing a wear resistant coating on a surface of a substrate said method comprising vaporizing chromium in the presence of said substrate so as to form a layer of chromium on the surface of said substrate and thereafter reacting said vaporized chromium with nitrogen in the presence of said substrate and continuously decreasing a concentration of said nitrogen to form said wear-resistant coating on said layer of chromium on said substrate surface, wherein said coating is a composition of chromium and nitrogen which is chromium nitride adjacent said layer of chromium and which continuously increases in chromium content toward the surface of said coating.
Dependencies are inferred from the claim text.