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Advances in Materials Science and Engineering
Volume 2013 (2013), Article ID 367543, 8 pages
http://dx.doi.org/10.1155/2013/367543
Research Article

Effects of Nitride on the Tribological Properties of the Low Carbon Alloy Steel

1Department of Mechanical Engineering, Kun Shan University, Tainan 710, Taiwan
2Department of Power Mechanical Engineering, National Formosa University, Yunlin 632, Taiwan
3Department of Mechanical and Automation Engineering, I-Shou University, Kaohsiung 840, Taiwan
4Hiwin Technologies Corp., Taichung 40707, Taiwan

Received 15 September 2013; Accepted 2 November 2013

Academic Editor: Shoou-Jinn Chang

Copyright © 2013 Yuh-Ping Chang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The technology of composite heat treatment is used popularly for low friction and wear resistance of drive elements. A large number of papers about the heat treatment technology had been proposed. Especially, the nitride treatment has been used widely for the purpose of wear resistance and low friction in the industry. Therefore, the self-developed vertical ball/disk friction tester with the measurement system was used to study the effects of nitride on the tribological properties of the low carbon alloy steel—SCM415— in this study. The experiments were conducted under dry and severe wear conditions. The variations of friction coefficient and surface magnetization were simultaneously recorded during dynamic friction process. After each test, the microstructures of the wear particles were observed and analyzed under a SEM, and the depth of wear track is measured by means of a surface tester. According to the experimental results, the wear resistance of the specimens with carburizing-nitride is significantly larger than the case of nitride-carburizing. Moreover, the surface magnetization was especially larger for the case of nitride-carburizing. As a result, the wear particles always stay in the interfaces and the wear mechanism becomes complex. Therefore, it is necessary to put nitride after carburizing for the composite heat treatments.