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research-article

Wear properties and scuffing resistance of the Cr-Al2O3 coated piston rings: The effect of convexity position on barrel surface

[+] Author and Article Information
Siqi Ma

Key Lab of Ship-Machinery Maintenance & Manufacture, Dalian Maritime University, Dalian 116026, China
879510609@qq.com

Wenbin Chen

Key Lab of Ship-Machinery Maintenance & Manufacture, Dalian Maritime University, Dalian 116026, China
wenbinvan@outlook.com

Cheng-Di Li

Key Lab of Ship-Machinery Maintenance & Manufacture, Dalian Maritime University, Dalian 116026, China
lichengdi17@163.com

Mei Jin

Key Lab of Ship-Machinery Maintenance & Manufacture, Dalian Maritime University, Dalian 116026, China
lulu1987121@126.com

Ruo-Xuan Huang

Department of Materials Science and Engineering, Dalian Maritime University, Dalian 116026, China
huan0237@e.ntu.edu.sg

Jiu-Jun Xu

Key Lab of Ship-Machinery Maintenance & Manufacture, Dalian Maritime University, Dalian 116026, China
xu.jiujun@163.com

1Corresponding author.

ASME doi:10.1115/1.4041215 History: Received January 31, 2018; Revised August 13, 2018

Abstract

This work investigates the effect of convexity position of ring barrel surface on the wear properties and scuffing resistance of the Cr-Al2O3 coated piston rings against with the cast iron cylinder liner. The scuffed surface morphology and elements distribution as well as the oil film edge were analyzed to explore the influencing mechanism of the convexity positon on the scuffing resistance. The results show that the convexity offset rate on the barrel surface of the ring has no noticeable influence on both friction coefficient and wear loss near the dead points. But a suitable convexity position will result in the improved scuffing resistance. The shape of the barrel face not only affects the worn area on the ring, but also determines the oil film wedge and pressure distribution, consequently influence the scuffing resistance.

Copyright (c) 2018 by ASME
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