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 CrC and TiC appeared in the coatings during the solidification process. The wear width, depth, and volume were minimized. The wear rate (2.54×10 mm/(N·m)) was an order of magnitude lower than that of CoCrFeNi (4.97×10 mm/(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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激光熔覆原位/原位TiC增强CoCrFeNiW0.4Si0.2高熵合金涂层的显微组织和磨损性能


采用激光熔覆技术在 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和异位/原位TiC对涂层微观结构和磨损性能的协同作用。结果表明，异位/原位TiC促进了(111)晶面择优取向的FCC相的选择，并且原位TiC和W+异位TiC/原位TiC的增加导致FCC相向BCC相的转变。 W+原位TiC涂层的微观结构更加均匀，并且在凝固过程中涂层中出现了两个异质形核点CrC和TiC。磨损宽度、深度和体积都被最小化。磨损率（2.54×10 mm/（N·m））比CoCrFeNi（4.97×10 mm/（N·m））低一个数量级。 W+原位TiC涂层表现出最好的耐磨性。存在少量磨屑和浅沟状沟槽，磨损机制为磨粒磨损。 W和原位TiC对耐磨性的协同作用显着。