The W and extra/in-situ TiC reinforced CoCrFeNi high-entropy alloy coating was prepared on a 45 steel substrate by laser cladding. The synergistic effect of W and ex/in-situ TiC on the microstructure and wear properties of the coating was studied. The results showed that the ex/in-situ TiC promoted the selection of the FCC phase with a preferred orientation to the (111) crystal plane, and the increasing of in-situ TiC and W+ex-situ TiC/in-situ TiC resulted in the transformation of the FCC phase to the BCC phase. The microstructure of W+in-situ TiC coating was more uniform and two heterogeneous nucleation points Cr3C2 and TiC appeared in the coatings during the solidification process. The wear width, depth, and volume were minimized. The wear rate (2.54×10−6 mm3/(N·m)) was an order of magnitude lower than that of CoCrFeNi (4.97×10−5 mm3/(N·m)). The W+in-situ TiC coating shows the best wear resistance. There were a small amount of wear debris and shallow furrow-like grooves, and the wear mechanism was abrasive wear. The synergistic effect of W and in-situ TiC on wear resistance was significant.

中文翻译：

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激光熔覆制备的防爆/原位 TiC 增强 CoCrFeNiW0.4Si0.2 高熵合金涂层的显微组织和磨损性能


通过激光熔覆在 45 钢基体上制备了 W 和额外/原位 TiC 增强的 CoCrFeNi 高熵合金涂层。研究了 W 和离原位 TiC 对涂层微观结构和磨损性能的协同效应。结果表明，非原位 TiC 促进了 （111） 晶面优先取向的 FCC 相的选择，原位 TiC 和 W+非原位 TiC/原位 TiC 的增加导致 FCC 相向 BCC 相转变。W+原位TiC涂层的微观结构更加均匀，在凝固过程中涂层中出现两个异质形核点Cr3C2和TiC。磨损宽度、深度和体积最小化。磨损率 （2.54×10−6 mm3/（N·m）） 比 CoCrFeNi （4.97×10−5 mm3/（N·m）） 低一个数量级。W+原位 TiC 涂层显示出最佳的耐磨性。有少量磨屑和浅沟状沟槽，磨损机理为磨料磨损。W 和原位 TiC 对耐磨性的协同作用显著。