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:
Jan. 05, 2016
Filed:
Mar. 27, 2012
Yuuzoh Fukunaga, Narita, JP;
Kazuyuki Kubota, Narita, JP;
Yuuzoh Fukunaga, Narita, JP;
Kazuyuki Kubota, Narita, JP;
Hitachi Tool Engineering, Ltd., Tokyo, JP;
Abstract
A hard-coated member comprising a substrate made of cemented carbide or high-speed steel and a titanium carbonitride layer formed on the substrate by a chemical vapor deposition method, the titanium carbonitride layer comprising first to third layers each having a columnar crystal structure in this order from the side of the substrate, the second layer being smaller than the first layer in carbon concentration, and the third layer being smaller than the second layer in carbon concentration, and an indexable rotary tool comprising it. The first layer is formed by using a starting material gas comprising a TiClgas, an Ngas, a C-Chydrocarbon gas and an Hgas, the second layer is formed by using a starting material gas comprising a TiClgas, an Ngas, an organic cyanide gas, a C-Chydrocarbon gas, and an Hgas, and the third layer is formed by using a starting material gas comprising a TiClgas, an Ngas, an organic cyanide gas, whose amount is smaller than in the second layer, and an Hgas.