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利用拉伸试验、磨损试验、金相显微镜和扫描电子显微镜研究了稀土对CuAl9Fe4Ni4Mn2合金力学性能、耐磨性能及微观组织的影响。结果表明,适量的稀土可以显著提高CuAl9Fe4Ni4Mn2合金的力学性能和耐磨性能。随稀土含量的增加,合金的抗拉强度和磨损性能呈现先提高后降低的变化规律;当加入0.08%的稀土,合金具有最优的综合力学性能。与未加稀土的合金相比,伸长率、抗拉强度、显微硬度,分别提高了27.8%、5.4%、22.4%,磨损失重降低了86.7%。随着载荷的增大,主要磨损机制由低载荷时的轻微磨粒磨损向高载荷时的严重黏着磨损转变。
The effects of rare earth on the mechanical properties, wear resistance and microstructure of CuAl9Fe4Ni4Mn2 alloy were studied by tensile test, wear test, optical microscope and scanning electron microscope. The results show that proper amount of rare earth can significantly improve the mechanical properties and wear resistance of CuAl9Fe4Ni4Mn2 alloy. With the increase of the content of rare earth, the tensile strength and wear resistance of the alloy first increased and then decreased. When adding 0.08% rare earth, the alloy has the best comprehensive mechanical properties. Compared with the non-added rare earth alloy, the elongation, tensile strength and microhardness increased by 27.8%, 5.4% and 22.4% respectively, and the wear loss decreased by 86.7%. As load increases, the primary wear mechanism shifts from slight abrasive wear at low loads to severe adhesive wear at high loads.