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:
May. 24, 2016
Filed:
Sep. 21, 2012
Ntn Corporation, Osaka-shi, Osaka, JP;
NTN CORPORATION, Osaka, JP;
Abstract
The present invention provides a hard film which has high wear resistance and excellent peeling resistance and can be prevented from peeling off a base material over a long period of time and a hard film formed body on which the hard film is formed. A hard film () has a structure composed of a first mixed layer (), consisting mainly of Cr and WC, which is formed directly on a raceway surface () of an inner ring () (base material) of a rolling bearing, a second mixed layer (), consisting mainly of WC and DLC, which is formed on the first mixed layer (), and a surface layer (), consisting mainly of DLC, which is formed on the second mixed layer (). In the first mixed layer (), a content rate of the Cr becomes continuously or stepwise lower and that of the DLC becomes continuously or stepwise higher from a side of the base material toward a side of the second mixed layer (). In the second mixed layer (), a content rate of the WC becomes continuously or stepwise lower and that of the DLC becomes continuously or stepwise higher from a side of the first mixed layer () toward a side of the surface layer (). A content of hydrogen in the second mixed layer () is set to 10 to 45 atomic percent.