轴瓦用新型铝锡合金基复合材料的显微组织及油润滑摩擦性能  

The Microstructure and Oil Lubricated Friction Properties of Al-Sn Alloy Matrix Composites for Bearing Bush

作　　者：崔国明 张雅君 李兴霞 孙国进 王会敏 CUI Guoming;ZHANG Yajun;LI Xingxia;SUN Guojin;WANG Huimin(School of Materials Science and Engineering,Henan Institute of Technology,Xinxiang 453003,China)

机构地区：[1]河南工学院材料科学与工程学院,河南新乡453003

出　　处：《河南工学院学报》2023年第4期11-14,31,共5页Journal of Henan Institute of Technology

基　　金：河南省高等学校青年骨干教师培养计划(2019GGJS266)。

摘　　要：采用混合盐反应法制备出原位TiB_(2p)/Al-10Sn轴瓦用复合材料,并用光学显微镜和扫描电镜对材料的铸态组织进行分析。结果表明:复合材料中α-Al基体晶粒细小,TiB_(2)颗粒尺寸小于1.5μm,在α-Al基体晶界处出现了TiB_(2)颗粒偏聚现象,并形成锡包TiB_(2)颗粒组织。在不同载荷下,采用“小止推圈-磨盘”式摩擦试验机,对复合材料(TiB_(2p)/Al-10Sn)和基体合金(Al-10Sn)的室温油润滑摩擦性能进行测试。结果表明:低载荷200 N时,复合材料和基体合金都存在明显的磨合期,且均表现出良好的减摩特性,其稳态摩擦系数分别为0.017和0.015,稳态摩擦温度分别为33.6℃和32.1℃;高载荷400N时,复合材料和基体合金的稳态摩擦系数分别为0.080和0.170,稳态摩擦温度分别为57.6℃和75.4℃,复合材料表现出更高的承载能力和更好的减摩特性。The in-situ TiB_(2p)/Al-10Sn composites for bearings were fabricated by Mixed Salt Reaction in-situ synthesis process.The solidification microstructure of the composites was investigated by optical microscope and scanning electron microscope.The results indicate that the grains ofα-Al matrix are fine,the TiB_(2) particle size is less than 1.5μm,and the agglomeration of TiB_(2) particles occurs in the interface betweenα-Al and eutectic tin,where an interesting microstructure of TiB_(2) particles wrapped by tin film was discovered.And the oil lubricated sliding friction tests of composites and matrix alloy were conducted on a small thrust ring versus disc friction testing machine at room temperature under different loads.The experimental data shows that,at low load(200 N),both composites and matrix alloy have a conspicuous running-in period and exhibit better antifriction property,with the steady-state friction coefficient being 0.017 and 0.015,and the steady-state frictional temperature being 33.6℃and 32.1℃,respectively.However,at high load(400 N),the steady-state friction coefficient of composites and matrix alloy is approximately 0.080 and 0.17,and with the steady-state frictional temperature being 57.6℃and 75.4℃,respectively.The composites exhibit higher bearing capacity and excellent antifriction.

关 键 词：铝锡轴瓦合金 复合材料 显微组织 摩擦性能 

分 类 号：TB331[一般工业技术—材料科学与工程]