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| Citation: |
WANG Yongdong, GONG Shulin, CHANG Mengyang, WANG Jinyu, REN yuanda, JING zonghao. Effect of Nb components on the microstructure and mechanical properties of high-entropy alloy coatings[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2024, 45(3): 107-113. DOI: 10.12073/j.hjxb.20230329001
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CoCrFeNiTi0.8Nby (y = 0.25, 0.5, 0.75, 1.0) coatings were prepared on the surface of Q235 steel using laser cladding. The phase structure and microstructure of the coatings were analyzed by optical microscope (OM), X-ray diffractometer (XRD), scanning electron microscope (SEM) and energy dispersive spectroscopy (EDS). The hardness and wear resistance of the coatings were tested by micro-Vickers hardness tester and friction wear tester. The results show that the microstructure shows a typical dendritic crystal structure, and the addition of Nb elements decreases the size of the grains; by increasing the content of Nb elements, the crystal structure of the high-entropy alloy coatings consists of BCC phases, a small amount of FCC phases, and Fe2(Ti, Nb)-type Laves phases; the microhardness of the coatings is improved by the combined effect of fine-grained reinforcement, solid solution strengthening, and the strengthening of the second phase; The presence of the intermediate phase can hinder the plough cutting process to a certain extent, which improves the wear resistance of the coating; CoCrFeNiTi0.8Nb0.75 coating has the best hardness and wear resistance, the hardness of 710 HV, about 4 times that of the substrate, and the coating has the smallest amount of abrasion, and the abrasion marks are relatively flat.
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沈虎，李先芬，叶俊洋，张雅婷，华鹏，刘大双. SiC-Ni60涂层中添加nano-Cu包覆MoS_2对其组织和摩擦磨损性能的影响. 焊接学报. 2024(09): 69-75 .
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马凯，冯力，赵燕春，刘建军. 激光重熔合成FeCrAlCu(Ni, Co)高熵合金涂层组织与耐磨性能（英文）. 稀有金属材料与工程. 2024(10): 2747-2754 .
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