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研究了稀土对铸CuAl9Fe4Ni4Mn2合金的显微组织、力学性能、不同载荷下磨损量大小和磨面成分变化的影响,利用扫描电镜和能谱仪对合金的显微组织、磨面形貌及磨面成分进行了观察与分析。结果表明,少量的稀土即可使合金表现出十分优异的力学性能,进而显著提高了合金的耐磨性能。与未加稀土的合金相比,加入0.08%稀土的合金在600 N、900 N、1200 N三种载荷下,磨损量分别减少了29 mg、32 mg、64 mg。随着载荷的变化,未加稀土合金呈现不同的磨损机理,磨面O、C、Fe、Al含量变化很大;而添加适量稀土合金在三种载荷下有着稳定的磨损机理,且同种载荷下磨面O、C、Fe、Al含量变化远小于未添加稀土合金。可见,稀土对铸CuAl9Fe4Ni4Mn2合金微观组织的优化作用可以显著提高合金的性能。
The effects of rare earth on the microstructure, mechanical properties, the amount of wear under different loads and the composition of the grinding surface of the cast CuAl9Fe4Ni4Mn2 alloy were investigated. The microstructure, wear surface morphology and surface wear of the alloy were studied by SEM and EDS The components were observed and analyzed. The results show that a small amount of rare earth alloy can show very good mechanical properties, thereby significantly improving the wear resistance of the alloy. Compared with the non-added rare earth alloy, the wear amount decreased by 29 mg, 32 mg and 64 mg at 600 N, 900 N and 1200 N under the loads of 0.08% rare earth. With the change of load, the non-added rare earth alloys show different wear mechanisms, and the contents of O, C, Fe and Al have great changes. However, the addition of proper amount of rare earth alloy has stable wear mechanism under the three kinds of loads, Lower wear surface O, C, Fe, Al content is much smaller than the change without adding rare earth alloy. Visible, rare earth on the cast CuAl9Fe4Ni4Mn2 alloy microstructure optimization can significantly improve the performance of the alloy.