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:
Jul. 08, 2003
Filed:
Apr. 17, 2001
Masaki Kobayashi, Kanagawa, JP;
Hiroshi Kitada, Kanagawa, JP;
Toshiba Tungaloy Co., Ltd., Kawasaki, JP;
Abstract
The present invention is to provide a highly adhesive surface-coated cemented carbide which comprises a cemented carbide base material and a hard film formed on a surface of the base material, characterized in that both of the hard film at a proximate portion of an interface between the hard film and the cemented carbide base material and the cemented carbide at a proximate portion of an interface contain at least one diffusive element selected from chromium, molybdenum, manganese, copper, silicon and an iron group metal and a method for producing the same by uniformly coating at least part of a surface of the base material with a metal, an alloy, or a compound comprising at least one diffusive element selected from iron group metals, chromium, molybdenum, manganese, copper, and silicon followed by coating the surface with the hard film.