马世忠,孙荣禄,牛伟,谷米,左润燕,张连旺.激光熔覆CoCrFeNiWx高熵合金涂层的组织及性能[J].表面技术,2023,52(3):429-437.
MA Shi-zhong,SUN Rong-lu,NIU Wei,GU Mi,ZUO Run-yan,ZHANG Lian-wang.Microstructure and Properties of CoCrFeNiWx High Entropy Alloy Coated by Laser Cladding[J].Surface Technology,2023,52(3):429-437 |
| 激光熔覆CoCrFeNiWx高熵合金涂层的组织及性能 |
| Microstructure and Properties of CoCrFeNiWx High Entropy Alloy Coated by Laser Cladding |
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| DOI：10.16490/j.cnki.issn.1001-3660.2023.03.041 |
| 中文关键词: 激光熔覆 高熵合金 W CoCrFeNi 微观组织 显微硬度 摩擦磨损性能 |
| 英文关键词:laser cladding high-entropy alloy W CoCrFeNi microstructure microhardness tribological properties |
| 基金项目: |
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| Author | Institution |
| MA Shi-zhong | School of Mechanical Engineering, Tiangong University, Tianjin 300387, China |
| SUN Rong-lu | School of Mechanical Engineering, Tiangong University, Tianjin 300387, China;Tianjin Key Laboratory of Advanced Mechatronics Equipment Technology, Tianjin 300387, China |
| NIU Wei | School of Mechanical Engineering, Tiangong University, Tianjin 300387, China;Tianjin Key Laboratory of Advanced Mechatronics Equipment Technology, Tianjin 300387, China |
| GU Mi | School of Mechanical Engineering, Tiangong University, Tianjin 300387, China |
| ZUO Run-yan | School of Mechanical Engineering, Tiangong University, Tianjin 300387, China |
| ZHANG Lian-wang | School of Mechanical Engineering, Tiangong University, Tianjin 300387, China |
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| 中文摘要: |
| 目的 研究W含量对激光熔覆CoCrFeNi高熵合金涂层组织及性能的影响。方法 采用RFL-C1000光纤激光器在45#钢表面制备CoCrFeNiWx(x=0、0.2、0.4、0.6、0.8)高熵合金涂层，利用光学显微镜、X射线衍射仪(XRD)、扫描电子显微镜(SEM)、显微硬度计、摩擦磨损试验机等，对熔覆层的宏观形貌、微观组织、显微硬度和摩擦磨损性能进行分析和测试。结果 熔覆层与基材之间的润湿性较好。随着W元素含量的增加，涂层由单一的FCC相转变为FCC相+μ相(Fe7W6、Co7W6)，微观组织由胞状晶转变为树枝晶，晶粒尺寸减小，且在x=0.8时出现了明显的共晶组织和大量μ相沉淀。熔覆层的显微硬度随着W含量的增加而增大，x=0.8时，熔覆层具有最高的显微硬度，达到432.02HV0.3，约为基材硬度的2.1倍，为CoCrFeNi熔覆层硬度的2.2倍。x=0.6时，涂层磨损量最小，仅为CoCrFeNi涂层磨损量的30.85%，平均摩擦因数最低，约为0.311。随着W元素含量的增加，涂层磨损机制由黏着磨损和磨粒磨损转变为磨粒磨损。结论 W元素的加入促进了μ相的生成，大幅提高涂层硬度，改善涂层的耐磨性能，强化机制为固溶强化、细晶强化和第二相强化。 |
| 英文摘要: |
| CoCrFeNiWx (x=0, 0.2, 0.4, 0.6, 0.8) high entropy alloy coating was prepared on the surface of 45# steel by laser cladding. The effect of W content on the microstructure and properties of the high entropy alloy coating was studied. |
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