(1. 裝甲兵工程學(xué)院 材料科學(xué)與工程系,北京 100072;
2. 裝甲兵工程學(xué)院訓(xùn)練部, 北京 100072;
3. 西安交通大學(xué) 材料科學(xué)與工程學(xué)院， 西安 710049)
摘 要: 研究了低、中、高3種含油量的銅石墨自潤(rùn)滑材料的滑動(dòng)摩擦磨損過(guò)程，發(fā)現(xiàn)其磨損量很微小，處于穩(wěn)態(tài)工作時(shí)的磨損量最低。依據(jù)摩擦系數(shù)的變化，利用SEM分析磨損表面形貌和剖面結(jié)構(gòu)，得知自潤(rùn)滑材料滑動(dòng)摩擦第Ⅰ階段對(duì)應(yīng)的磨損機(jī)理是磨粒磨損，第Ⅱ和第Ⅲ階段對(duì)應(yīng)的是疲勞磨損，疲勞裂紋的擴(kuò)展方向接近試樣表層拉應(yīng)力區(qū)域的最大剪切圓軌跡，疲勞磨屑最終脫落是法向力的作用結(jié)果，依此，確立形成疲勞磨屑的判據(jù)。
關(guān)鍵字: 粉末冶金材料； 滑動(dòng)摩擦； 自潤(rùn)滑材料；磨損
material slid friction
WANG Yong-lan3， JIN Zhi-hao3
（1. Department of Materials Science and Engineering，
Armored Force EngineeringInstitute，Beijing 100072，P.R.China；；
2. Department of Discipline，
Armored Force Engineering Institute，P.L.A，Beijing 100072，P.R.China；
3. School of Materials Science and Engineering，
Xi′an Jiaotong University，Xi′an 710049，P.R.China）
Abstract: The wear experiment was taken in Amsler friction experiment device， and the wear property was judged by the volume loss of the sample. It was found that the sample volume loss during self-lubrication friction process is very small and the least wear is taken place in the stable self-lubrication friction stage. The wear mechanisms were studied by analyzing the wear surface and wear section plane through SEM. It was found that in dμ/dn <0 friction stage， the wear mechanism is plowing; in dμ/dn →0 and dμ/dn →∞ stages， the mechanism is fatigue wear. At last， the criterion of forming fatigue wear bit was given.
Key words: powder metallurgy material； sliding friction； self-lubrication material； wear
