Wear behavior of the aluminum-silicon alloy cylinder liner wear against Chrom–Keramik–Schicht piston ring

Abstract

The aluminum–silicon alloy cylinder liner shows great potential for engine cylinder liner applications as its excellent castability, light weight, and good thermal conductivity. In order to improve the capability of the whole friction system further, the friction performance of the piston rings wear against cylinder liner should be discussed in details. In this paper, the wear behavior of the aluminum–silicon alloy cylinder liner wear against Chrom–Keramik–Schicht (CKS) piston ring was carried out by the contraposition reciprocating test rig under lubrication. The surface morphology was characterized by scanning electron microscopy and energy dispersive X-ray spectrometry. When CKS piston ring wears against aluminum–silicon alloy cylinder liner, comparing with sprayed molybdenum piston ring, the friction coefficient reduced nearly 10%. Besides, the weight loss of cylinder liner and piston ring reduced nearly 95%. In the process of friction, aluminum was rolled repeatedly on the surface of cylinder liner. And the honing roads were still visible clearly on the worn surface. The coating of CKS piston ring is dense, lower roughness and higher hardness, and not easy to fall off. While the worn surface of CKS piston ring was smooth in the process of adhesive wear. When the aluminum–silicon alloy cylinder liner wears against CKS piston ring, the matched pair presents an excellent wear behavior.