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:
Mar. 27, 2018
Filed:
Sep. 05, 2014
Asimco Shuanghuan Piston Ring (Yizheng) Co., Ltd., Yizheng Jiangsu, CN;
Abstract
The invention relates to a multilayer multi-element composite hard PVD coating with low friction coefficient on the surface of a piston ring, a piston ring and a preparation process. The present invention employs vacuum multi-arc ion plating vapor deposition process, which uses multiple multi-arc ion sources, in the combination of equipping with different single metal target material and multi-element target material to deposit multilayer multi-element composite hard PVD coating with low friction coefficient on the surface of a steel or cast iron piston ring. The coating consists of five layers with the total thickness of up to 60 μm. The coating has high adhesion with the surface of piston ring, high hardness, low friction coefficient and good abrasion resistance. By controlling the adding amount of additive elements Al, Mo, W, B, Si and Ti, the friction coefficient of the coating can be further reduced 5 to 20% compared with that of a single TiN or CrN deposited layer.