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. 28, 1981
Filed:
Jul. 02, 1979
Hitachi Metals, Ltd., Tokyo, JP;
Abstract
A surface coated hard alloy material suitable for use as a material of cutting tools, anti-wear parts or the like in which a high wear resistance, oxidation resistance and anti-weld characteristics are the essential requisites, and a method of producing the same. The material has a substrate made of a cemented carbide, cermet or the like hard material, a first coating layer of a solid solution of a hafnium compound and a titanium compound, and a second coating layer of titanium compound formed on the first coating layer. The coating layers are successively formed in a common reaction system by bringing hafnium tetraiodide and titanium tetraiodide together with a reaction gas into contact with the substrate while the latter is heated by high frequency induction heating, and then introducing only the titanium tetraiodide together with the reaction gas to the substrate, under reduced pressure and in the presence of a glow discharge.