触土部件高熵合金耐磨涂层磨损性能研究

Study on the Wear Performance of High-entropy Alloy Wear-resistant Coatings of Soil-touched Parts

为了提升农机触土部件的耐磨性能,该文分别选取FeCoCrNiMn高熵合金、Fe90合金、Ni60A合金粉末进行对比研究。以65Mn钢为基体,采用激光熔覆技术制备耐磨涂层,摩擦磨损试验机检测其磨损性能。结果显示,FeCoCrNiMn高熵合金涂层组织最为致密,晶粒较为单一,没有复杂金属间化合物形成;Ni60A和Fe90合金涂层微观组织晶粒分布较杂乱。65Mn钢基材、Ni60A合金、Fe90合金和FeCoCrNiMn高熵合金涂层的磨损失量分别为9,4,5和2 mg,基体的磨损失量远大于涂层。Fe90和Ni60A合金涂层维氏硬度为683.87和663.62 HV,FeCoCrNiMn高熵合金涂层硬度值为635.81 HV,略低于其他涂层,但其耐磨性较好。

In order to improve the wear resistance of soil contact parts of agricultural machinery,FeCoCrNiMn high-entropy-alloy,Fe90 alloy and Ni60A alloy powder were selected for comparative study.Using 65Mn steel as matrix,the wear-resistant coating was prepared by laser cladding technology,and its wear performance was tested by friction and wear testing machine.The results show that the microstructure of FeCoCrNiMn high-entropy-alloy coating is the most dense,the grain is relatively simple,and there is no complex intermetallic compound formation.The grain distribution of Ni60A and Fe90 alloy coatings is chaotic.The wear loss of 65Mn steel substrate,Ni60A alloy,Fe90 alloy and FeCoCrNiMn high-entropy-alloy coating is 9,4,5 and 2mg,respectively,and the wear loss of the matrix is much larger than that of the coating.The Vickers hardness of Fe90 and Ni60A alloy coating is 683.87 and 663.62HV,and the hardness value of FeCoCrNiMn high-entropy-alloy coating is 635.81HV,which is slightly lower than other coatings,but its wear resistance is better.