摩擦压力对铜基粉末冶金材料第三体的影响  

Effect of Friction Pressure on Third Body of Copper Based Powder Metallurgy Materials

作　　者：韩晓明[1] 何卫东[2] 李晓阳[1] 藤颍丽 HAN Xiaoming HE Weidong LI Xiaoyang TENG Yingli(Engineering Research Center of Continuous Extrusion of Ministry of Education, Dalian Jiaotong University, Dalian 116028, China College of Mechanical Engineering, Dalian Jiaotong University, Dalian 116028, China)

机构地区：[1]大连交通大学连续挤压教育部工程研究中心,辽宁大连116028 [2]大连交通大学机械工程学院,辽宁大连116028

出　　处：《热加工工艺》2017年第2期64-66,共3页Hot Working Technology

基　　金：辽宁省教育厅科学研究项目(L2013188);中国铁路总公司重点科技计划项目(2013J011-E)

摘　　要：采用粉末冶金技术制备铜基粉末冶金材料,利用销盘式摩擦试验机,研究了摩擦压力(0.5~1.1MPa)对铜基粉末冶金材料第三体的影响。探讨了摩擦压力、第三体与摩擦磨损性能的关系。结果表明,随摩擦压力的提高,摩擦系数呈现下降趋势,磨损率变化不明显,这是由于压力增加引起SiO_2和石墨破碎,也起到了耐磨和润滑的作用。摩擦压力提高,有利于提高第三体致密性,原因在于摩擦压力提高,摩擦表面温度增加,易于第三体挤压和粘着。The copper based powder metallurgy materials were prepared by powder metallurgy technology. Using pin disc friction tester, the effects of pressure （0.5-1.1MPa） on the third body of the material were investigated. The relationship between friction pressure, third body and tribological performance were discussed. The results show that the fi-iction coefficient decreases with the friction pressure increasing, but the wear rate changes little. It is because the increasing pressure aggravates the rupture of graphite and SiO2, which can play a role in improving the wear-resistance and lubrication. The density of the third body increases with the pressure increasing. This is due to the increase of friction pressure and temperature of wear suface, which is benefit for the extrusion and adhesion of the third body.

关 键 词：铜基摩擦材料 第三体 摩擦压力 

分 类 号：TG146.11[一般工业技术—材料科学与工程]