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:
Apr. 21, 1992
Filed:
Oct. 31, 1989
Yoshikazu Okada, Tokyo, JP;
Jun Sugawara, Yokohama, JP;
Mitsubishi Materials Corporation, Tokyo, JP;
Abstract
A blade member of tungsten carbide based cemented carbide for cutting tools has a tungsten carbide based cemented carbide substrate having a hard phase, a binder phase and unavoidable impurities. The hard phase has 5% to 60% by weight of one or more of carbide and carbo-nitride of titanium, tantalum and tungsten, and carbide and carbonitride of titanium, tantalum, niobium and tungsten. The binder phase has 3% to 10% by weight of cobalt and a balance tungsten carbide. The substrate has a surface softening layer having a cobalt-pool phase and an interior portion. The surface softening layer has an outermost region in which hardness is generally constant with respect to depth from the substrate surface and an inner region in which hardness rises inwardly of the substrate up to the hardness of the interior portion. There is also disclosed a process for producing the above-mentioned blade member.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile