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:
Jul. 01, 2025
Filed:
Apr. 03, 2024
Asimco Shuanghuan Piston Ring (Yizheng) Co., Ltd., Yizheng, CN;
Kaishun Li, Yizheng, CN;
Qianxi Liu, Yizheng, CN;
Yueting Zhou, Yizheng, CN;
Guanfei Shi, Yizheng, CN;
Asimco Shuanghuan Piston Ring (yizheng) Co., Ltd., Yizheng, CN;
Abstract
A piston ring with a hard plating and a preparation method therefor are provided. An OD surface of the piston ring includes an interlayer, a gradient metal nitride layer and a DLC repetitive unit layer sequentially from bottom to top; one DLC unit layer in the DLC repetitive unit layer sequentially includes a DLC layer and a metal-doped DLC layer; and chrome plating of a side face of the piston ring is a chrome plating on a side face of a piston ring matrix. The repetitively circulating DLC layers and metal-doped DLC layers are a combination of a micron-thickness layer and a nanometer-thickness layer to form a micro-nano layered structure, so that the binding force between each plating is enhanced and the internal stress of the plating is reduced; and meanwhile, metal doping in the DLC layer can effectively reduce the plating stress and solve the problem of plating peeling.