镍-铬基自润滑复合材料的制备及性能  

Preparation and Properties of Ni-Cr Based Self-lubricating Composite

作　　者：姜春华[1] 李长生[1] 丁巧党[1] 

机构地区：[1]江苏大学材料摩擦学省重点实验室,江苏镇江212013

出　　处：《机械工程材料》2007年第4期48-51,共4页Materials For Mechanical Engineering

摘　　要：利用粉末冶金法制备出了组织均匀、致密的镍-铬基自润滑复合材料,对其组织和性能进行了研究。结果表明:室温下,当MoS_2和LaF_3的质量分数分别为20%和5%时,复合材料的摩擦磨损性能最好,即协同效应最优;摩擦因数随着载荷的增大而降低,随着转速的增大先降低后增大。摩擦过程中下,其减摩机理是复合材料表面MoS_2膜的连续生成和对偶面上形成的转移膜。适量LaF_3的加入,有助于提高复合材料的耐磨性。Ni-Cr based self-lubricating composite with uniform and compact structure was prepared by powder metalliurgy method. The triobological properties of the composite were investigated using an MS-T3000 friction and wear tester at ambient temperature in air. When mass contents of MoS2 and LaF3 were 20% and 5% respectively, the composite had good triobological properties, the synergistic effect was the best. On the effect of friction, two MoS2-films showed the mechanism of antifriction, a thin film generated on the contact zone of composite and the transfer film was on its conterface. Addition of an appropriate amount of LaF3 helped to improve the composite＇ s wear property.

关 键 词：镍基合金 自润滑 协同效应 

分 类 号：TB33[一般工业技术—材料科学与工程]