Plasma Nitriding for Improving Wear Resistance of Cable Bolt

Abstract

In order to improve the wear resistance of the cable bolt and increase its life-time during operation, plasma nitriding was employed to obtain a protective nitriding layer on its surface. The microstructure, phase constitution, microhardness and wear resistance of the nitriding layer were investigated. It was shown that continuous and dense nitriding layers were formed on the surface of the samples. The microhardness of the nitrided sample was enhanced by the formation of nitriding layer, which mainly consisted of Fe 4 N and Fe 3 N . The mass losses of the nitrided samples were much smaller and the wear rates were almost hundred times lesser than that of the substrate. Plasma nitriding treatment can effectively enhance the wear resistance of cable bolt.

The Influence of Plasma Nitriding Process on Mechanical Properties of 14NiCr14 Steel

“…One of the most common technological processes of chemical-thermal processing is plasma nitriding, using the process of diffusion of nitrogen into the steel surface [1]. Plasma nitriding technology is widely used for improving the tribological properties, wear resistance and increase corrosion resistance [2,3]. However, plasma nitriding brings certain risks associated with decrease in toughness [4].…”