论文部分内容阅读
研究了非自耗电弧熔炼AlFeCrCoCu,AlFeCrCoCuTi高熵合金以及AlFeCrCoCuTi合金800℃回火后的组织、硬度及耐磨性能。研究发现,相比于AlFeCrCoCu合金,AlFeCrCoCuTi合金组织结构趋于复杂,合金由简单的bcc+fcc相变为由bcc1相,bcc2相,fcc相以及析出ω相组成的4相固溶体。Ti的加入提升了合金的整体硬度。合金具有很强的抗回火软化能力。3组合金的摩擦磨损主要以黏着磨损为主。Ti的添加,导致析出相的析出强化效应以及枝晶两相共析组织的特殊结构,提高了合金的耐磨性能。而回火后的AlFeCrCoCuTi合金耐磨性能更优,主要原因是随着摩擦时间的增加,回火后的合金表面上生成了一层氧化物附着在摩擦表面,提高了合金的耐磨性能。
The microstructure, hardness and wear resistance of non-consumable arc melting AlFeCrCoCu, AlFeCrCoCuTi high entropy alloy and AlFeCrCoCuTi alloy after tempering at 800 ℃ were studied. The results show that the microstructure of AlFeCrCoCuTi alloy tends to be complex compared with that of AlFeCrCoCu alloy, and the phase transition from simple bcc + fcc phase to 4 phase solid solution composed of bcc1 phase, bcc2 phase, fcc phase and precipitated ω phase. The addition of Ti improves the overall hardness of the alloy. Alloy has a strong resistance to tempering softening capacity. Friction and wear of the three groups of alloys are mainly adhesive wear. The addition of Ti results in the precipitation strengthening effect of the precipitated phase and the special structure of the dendritic two-phase eutectoid structure, which improves the wear resistance of the alloy. The tempering of the AlFeCrCoCuTi alloy wear better performance, mainly due to the friction time increases, the surface of the alloy after tempering the formation of a layer of oxide attached to the friction surface, improve the wear resistance of the alloy.