离子渗氮和离子渗硫复合处理表面的摩擦学性能

在４５钢离子渗氮表面，用低温郭了渗硫技术形成具有良好固体润滑作用的渗硫层。采用ＳＥＭ＋ＥＤＸ和ＸＲＤ研究了渗层的组织结构，采用销盘式磨损试验机在油润滑条件下，对原始、渗氮、渗硫以及渗氮渗硫复合处理表面进行了抗擦伤性能及耐磨性能的系统研究。并采用ＥＤＸ和ＡＥＳ分析了摩擦表面边界润滑膜的成分。结果表明：渗硫和渗氮处理均只能在低还条件下提高表面的抗擦伤性能。而复合处理能在各种速度条件下显著提高抗擦伤

Tribological Behaviors of the Duplex-treated Surface by Ion-Nitriding + Ion-Sulphurizing

According to the tribological principles, a sulphide layer with excellent solid lubrication effect was produced on the nitrided 1045 steel surface by low temperature ion sulphurization technology in order to improve its tribological behavior. SEM+EDX was used to analyze the microstructure of the layer.A pin-on-disc wear tester was used to investigate the anti-scuffing, friction-reducing and wear-resistant behaviors of the original, nitrided, sulphurized, and nitrided+sulphurized surfaces systemically. EDX and AES were employed to analyze the compositions of boundary lubrication films. The results showed that sulphuration or nitriding could improve the anti-scuffing behavior of surface only at low speed, while, nitriding+ sulphuration could improve that not only at low speed but also at high speed. The wear-resistance of surface treated by nitriding+sulphuration was also increased greatly and better than that by single sulphurization or nitriding obviously, but the wear of ball rubbing against it became more serious. The nitrided substrate with high hardness could extend the endurance period of the sulphide layer, and reduce the friction and wear effectirely. A rather thick boundary lubrication film composed of iron sulphide and iron oxide could be formed on the nitrided+sulphurized surface in the friction process. which showed a good symergistic effect.