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US 6,645,566 B2Granted
Process for heat treatment nitriding in the presence of titanium and products produced thereby
OwnerJong Ho Koinventor
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Abstract
A method for nitriding a metallic base material at low temperatures in a salt bath containing electrolyzed titanium metal. A nitride coating of exceptional depth and hardness is obtained in a very short operating time due to the rapid nitriding process. The method is applicable to steel, titanium, aluminum and alloys thereof.
Claims17
A method for nitriding a base metal material comprising:
- (a) providing a base metal material selected from the group consisting of titanium, titanium alloys, aluminum, and aluminum alloys;
- (b) providing a salt bath which includes sodium dioxide and a salt selected from the group consisting of sodium cyanate and potassium cyanate;
- (c) dispersing metallic titanium formed by electrolysis of a titanium compound, in said bath;
- (d) heating the salt bath to a temperature ranging from about 430° to about 670° C.;
- and
- (e) soaking the material in the salt bath for a time of from about 2 to about 10 hours.
3 more elements
Dependencies are inferred from the claim text.