硬质颗粒TiC对Al-Sn-Cu合金性能影响研究  

Investigation on Effects of Hard Particles TiC on Properties of Al-Sn-Cu Alloy

作　　者：曹刚 尹延国[1] 李聪敏 许明 李蓉蓉 CAO Gang;YIN Yanguo;LI Congmin;XU Ming;LI Rongrong(School of Mechanical Engineering, Hefei University of Technology, Hefei 230009, China)

机构地区：[1]合肥工业大学机械工程学院,合肥230009

出　　处：《轴承》2022年第4期44-49,共6页Bearing

基　　金：国家自然科学基金资助项目(51575151)。

摘　　要：采用光学显微镜(OM)、扫描电子显微镜(SEM)、能谱分析(EDS)以及硬度试验和摩擦磨损试验等方法,研究了TiC颗粒对Al-Sn-Cu合金组织、力学性能及摩擦磨损性能的影响,结果表明:添加TiC颗粒后该合金组织明显细化,平均晶粒尺寸由87μm降低至37μm,降幅达到57.4%;布氏硬度达到95.2 HB,比未添加TiC颗粒时提高了10.658%,抗拉强度提升了5.88%;在载荷200 N、主轴转速200 r/min、干摩擦试验条件下,Al-Sn-Cu-TiC合金材料的摩擦因数为0.345,比未添加TiC颗粒的合金(0.384)降低了10.16%;在载荷200 N、主轴转速200 r/min、油润滑试验条件下,Al-Sn-Cu-TiC合金材料的摩擦因数为0.027,比未添加TiC颗粒的合金(0.126)降低了78.57%。By means of optical microscope(OM),scanning electron microscope(SEM),energy spectrum analysis(EDS),hardness test,friction and wear test,the effects of TiC particles on microstructure,mechanical properties and friction and wear properties of Al-Sn-Cu alloy are investigated.The results show that:the microstructure of the alloy with TiC particles is obviously refined,the average grain size decreases from 87μm to 37μm,the decline reaches 57.4%;the Brinell hardness reaches 95.2 HB,which is 10.658%higher than that without TiC particles,the tensile strength is increased by 5.88%;the friction coefficient of Al-Sn-Cu-TiC alloy is 0.345 under load of 200 N,spindle speed of 200 r/min and dry friction test,which is 10.16%lower than that without TiC particles(0.384);the friction coefficient of Al-Sn-Cu-TiC alloy is 0.027 under load of 200 N,spindle speed of 200 r/min and oil lubrication test,which is 78.57%lower than that without TiC particles(0.126).

关 键 词：滑动轴承 铝基轴瓦合金 显微组织 力学性能 滑动摩擦磨损 

分 类 号：TH133.31[机械工程—机械制造及自动化] TH142.2[一般工业技术—材料科学与工程]