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US 5,496,593 AGranted
Process for producing a nitrogen-alloyed stainless steel layer on steel
AssigneeNational Science Council
InventorsWen-Ta Tsai, Chong-Cheng Huang, Ju-Tung Lee
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Abstract
A process for producing a nitrogen-alloyed stainless steel layer on steel by applying nitride containing mixed metal powder or stainless powder to the steel surface, and thereafter treating the steel with laser beams.
Claims12
A process for producing a nitrogen-alloyed stainless steel layer on a steel substrate, comprising the following steps:
- a) cleaning the surface of the steel substrate by mechanical means;
- b) applying a mixed metal powder or a stainless powder to the surface of the steel substrate, wherein the mixed metal powder includes at least iron powder, chromium powder and nitride powder, and the stainless powder includes nitride powder;
- and
- c) scanning the surface of the steel substrate with a laser beam so that the heat input generated by the scanning of the laser beam melts the mixed metal powder or the stainless powder including nitride powder, and decomposes the nitride powder into nitrogen and the other element forming the nitride, which then dissolve into the melted mixed metal powder or melted stainless powder, thereby forming the nitrogen-alloyed stainless steel layer on the steel substrate.
1 more element
Dependencies are inferred from the claim text.