SrSO_(4)增强自润滑CoCrW基复合材料的制备及高温摩擦学性能  

Preparation and high⁃temperature tribological properties of self⁃lubricating CoCrW matrix composites reinforced by SrSO_(4)

作　　者：郭贺 崔功军 韩文鹏 刘燕萍 寇子明 Guo He;Cui Gongjun;Han Wenpeng;Liu Yanping;Kou Ziming(College of Mechanical and Vehicle Engineering,Taiyuan University of Technology,Taiyuan Shanxi 030024,China;Shanxi Mine Fluid Control Engineering Laboratory,Taiyuan Shanxi 030024,China;National-local Joint Engineering Laboratory of Mine Fluid Control,Taiyuan Shanxi 030024,China)

机构地区：[1]太原理工大学机械与运载工程学院,山西太原030024 [2]山西省矿山流体控制工程实验室,山西太原030024 [3]矿山流体控制国家地方联合工程实验室,山西太原030024

出　　处：《金属热处理》2024年第4期18-25,共8页Heat Treatment of Metals

基　　金：山西省基础研究计划(202303021211163);山西省回国留学人员科研资助项目(2021-060);国家自然科学基金(51775365,U1910212)。

摘　　要：为提高轴套和轴承的高温耐磨性,制备了SrSO_(4)(4.0%,9.0%,14.0%)增强自润滑CoCrW基复合材料,系统研究了SrSO_(4)对复合材料显微组织和高温摩擦学性能的影响。结果表明,SrSO_(4)在烧结过程中分解,原位生成Cr_(2)O_(3)、Cr_(2)S_(3)、CoCr2O_(4)和SrCrO_(4)相。磨损表面形成了含有原位生成的固体润滑剂、氧化物以及摩擦时的化学反应产物的润滑膜,提高了CoCrW基复合材料的高温润滑性能。综合来看,含有9.0%SrSO_(4)的CoCrW基复合材料具有理想的摩擦学性能。Self⁃lubricating CoCrW matrix composites reinforced by SrSO_(4)(4.0%,9.0%and 14.0%,respectively)were prepared to enhance the wear resistance of sleeve or bearing at high temperature,and the effect of SrSO_(4)on the microstructure and high⁃temperature tribological properties of composites was systematically investigated.The results show that the SrSO_(4)decomposes and the Cr_(2)O_(3),Cr_(2)S_(3),CoCr_(2)O_(4)and SrCrO_(4)phases are in⁃situ synthesized during sintering.A lubricating film containing in⁃situ synthesized solid lubricants and oxides as well as the tribochemistry reaction products is formed on the worn surfaces,improving the high⁃temperature lubricating properties of CoCrW matrix composites.As a result,the CoCrW matrix composite with 9.0%SrSO_(4)has the desired tribological properties.

关 键 词：复合材料 高温 自润滑性 磨损 

分 类 号：TH117[机械工程—机械设计及理论]