离子渗氮和离子渗硫复合处理表面的摩擦学性能  

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

作　　者：张宁[1] 庄大明[1] 刘家浚[1] 方晓东 官明喜 

机构地区：[1]清华大学机械工程系 [2]北京朝阳达威新技术试验厂

出　　处：《中国表面工程》2000年第2期18-22,共5页China Surface Engineering

摘　　要：在４５钢离子渗氮表面，用低温离子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速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性能。复合处理表面的耐磨性也明显优于渗硫和渗氮表面，但其对磨面的磨损却更为严重，甚至高于原始表面。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.

关 键 词：复合处理 摩擦学性能 离子渗氮 离子渗硫 

分 类 号：TG156.8[金属学及工艺—热处理]