Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Yoshio Okumura0
Akira Fujiwara0
Date of Patent
April 13, 2010
Patent Application Number
10559287
Date Filed
June 1, 2004
Patent Primary Examiner
Patent abstract
A chain pin manufacturing method that requires only one heat treatment step of forming a boundary part composed of (V, Cr) 8C7 by Cr and C in a base material at first through a cementation process in a VCl atmosphere by using Cr-rich steel as the pin base material and of forming a surface layer composed of V8C7. A Cr content in the boundary part decreases gradually toward the base material and the surface layer and the boundary part is not clearly divided. The inventive manufacturing method is simple and enables to manufacture the pin having high abrasion resistance and suitably used in a severe environment like a timing chain.
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