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:
Aug. 29, 2000
Filed:
Nov. 25, 1997
Applicant:
Inventors:
Assignee:
NGK Spark Plug Co., Ltd., , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B24D / ; C23C / ;
U.S. Cl.
CPC ...
51307 ; 4272498 ; 427309 ; 427560 ; 205674 ; 407119 ;
Abstract
The present invention provides a method of manufacturing a superhard article with diamond coat having an excellent resistance against breakaway or peeling off of its coat, in particular, a cutting tool. A carbide base material formed to a desired shape containing tungsten carbide (WC) as a main component is soaked in a solution of alkali chloride and undergoes electrolytic etching on the surface of the base material at a maximum removal speed of 0.2 to 1.5 .mu.m/min for 3 to 30 minutes and, after the surface of the base material is washed, a diamond coat is developed on the surface of the base material by vapor deposition.