The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 19, 1981
Filed:
Jul. 01, 1980
Thomas M Jakubowski, Salem, OR (US);
William G Wood, Grosse Pointe Farms, MI (US);
Kolene Corp., Detroit, MI (US);
Abstract
A process for case hardening steel is described. A fused bath of inert salt is maintained which bath is comprised of alkali or alkali earth halides, and alkali, or alkaline earth oxides or carbonates. To this fused bath is added urea, dicyanodiamide or pyrolysis/condensation products of urea or dicyanodiamide. This will form active ions containing carbon and/or nitrogen, and either the nitrogen and/or carbon will diffuse into the surface of a steel piece suspended in the bath to form either a nitride, carbonitride or carburized case depending upon the temperature of the bath, which is maintained between above 540.degree. C. and about 950.degree. C.