CAJ | 학술논문

为了获得高性能的涂层材料，采用激光熔覆的方法在45#钢基体上制备了MoFeCrTiWAlxSiy(x=0或1、y=0或1)高熵合金涂层，通过金相、XRD及硬度测试的手段重点探究了Al和Si两种元素对MoFeCrTiW高熵合金涂层组织与性能的影响。实验结果表明：Si的加入会促进金属间化合物大量的析出，细化晶粒效果明显，而且涂层的硬度显著提高，最高硬度可达839.3 HV；Al的加入会抑制金属间化合物的析出，使涂层形成单一的BCC相结构，但会使涂层的硬度降低。同时添加Si和Al，能够获得组织细密、硬度较高的优质涂层。
위료획득고성능적도층재료，채용격광용복적방법재45#강기체상제비료MoFeCrTiWAlxSiy(x=0혹1、y=0혹1)고적합금도층，통과금상、XRD급경도측시적수단중점탐구료Al화Si량충원소대MoFeCrTiW고적합금도층조직여성능적영향。실험결과표명：Si적가입회촉진금속간화합물대량적석출，세화정립효과명현，이차도층적경도현저제고，최고경도가체839.3 HV；Al적가입회억제금속간화합물적석출，사도층형성단일적BCC상결구，단회사도층적경도강저。동시첨가Si화Al，능구획득조직세밀、경도교고적우질도층。
To obtain high performance coating materials, the HEAs MoFeCrTiWAlxSiy coating was prepared on 45# steel by laser cladding. By means of OM, XRD and micro-hardness tester, the microstructure and properties of the high-entropy alloy layer with adding Al and Si element were investigated. The experimental results indicate that the addition of Si element will promote the formation of intermetallic compound, and Al in the coating exhibits obvious the grain refining. In addition, the hardness of the coating is significantly increased, and reaches a maximum (839.3 HV). Adding Al can inhibit the formation of intermetallic compound and induces the simple BCC phase structure of the coating, but the hardness of the coating decrease. Simultaneous addition of Si and Al, the excellent quality coating with detailed microstructure and relatively high hardness can be obtained.