| 机械合金化时间对Ni6Cr4W1.5Fe9Ti高熵合金激光熔覆涂层组织与耐蚀性的影响 |
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| 引用本文： | 孙德福,孙智程,谷臻,席生岐,孙崇锋,李世亮,苏成明,王春昌.机械合金化时间对Ni6Cr4W1.5Fe9Ti高熵合金激光熔覆涂层组织与耐蚀性的影响[J].金属热处理,2023,48(3):1-7. |
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| 作者姓名： | 孙德福 孙智程 谷臻 席生岐 孙崇锋 李世亮 苏成明 王春昌 |
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| 作者单位： | 1.西安交通大学 材料科学与工程学院 金属材料强度国家重点实验室, 陕西 西安 710049; 2.西安工业大学 材料与化工学院, 陕西 西安 710021; 3.陕西天元智能再制造股份有限公司, 陕西 西安 710200 |
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| 基金项目： | 陕西省自然科学基础研究计划一般项目(2021JQ-646);陕西省教育厅科研计划项目-自然项目(21JK0688) |
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| 摘 要： | 对机械合金化Ni6Cr4W1.5Fe9Ti高熵合金粉末进行激光熔化沉积，制备了该高熵合金的熔覆涂层，研究了机械合金化时间对涂层显微组织和耐蚀性能的影响。结果表明，机械合金化时间的增加可促进合金粉末成分的均匀化，且有利于涂层的致密化及其组织的晶粒细化。机械合金化棒磨4 h后的高熵合金粉末中，各组元均匀分布，并形成了FCC+BCC的双相固溶体结构；通过激光熔化沉积后，双相固溶体结构转变为FCC单相固溶体结构，组织主要由4～6μm的等轴晶和少量胞状晶组成。机械合金化棒磨4 h粉末制备熔覆涂层的致密度和硬度最高、耐蚀性最佳，其耐蚀性相较于棒磨0 h粉末制备熔覆涂层提升了近两个数量级。
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| 关 键 词： | 机械合金化 高熵合金 激光熔化沉积 组织 耐蚀性 |
| 收稿时间： | 2022-10-08 |
Effect of mechanical alloying time on microstructure and corrosion resistance of laser clad coating of Ni6Cr4W1.5Fe9Ti high-entropy alloy |
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| Sun Defu,Sun Zhicheng,Gu Zhen,Xi Shengqi,Sun Chongfeng,Li Shiliang,Su Chengming,Wang Chunchang.Effect of mechanical alloying time on microstructure and corrosion resistance of laser clad coating of Ni6Cr4W1.5Fe9Ti high-entropy alloy[J].Heat Treatment of Metals,2023,48(3):1-7. |
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| Authors: | Sun Defu Sun Zhicheng Gu Zhen Xi Shengqi Sun Chongfeng Li Shiliang Su Chengming Wang Chunchang |
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| Affiliation: | 1. State Key Laboratory of Metal Material Strength, School of Materials Science and Engineering, Xi'an Jiaotong University, Xi'an Shaanxi 710049, China; 2. School of Materials and Chemical Engineering, Xi'an Technological University, Xi'an Shaanxi 710021, China; 3. Shaanxi Tianyuan Intelligent Remanufacturing Co., Ltd., Xi'an Shaanxi 710200, China |
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| Abstract: | Clad coating of mechanical alloyed Ni6Cr4W1.5Fe9Ti high-entropy alloy powder was prepared by laser melting deposition. The effect of mechanical alloying time on microstructure and corrosion resistance of the coating was studied. The results show that the increase of mechanical alloying time can promote the homogenization of alloy powder composition, the densification of coating and the grain refinement of microstructure. After mechanical alloying rod grinding for 4 h, the components of high-entropy alloy powder are evenly distributed, and the FCC+BCC two-phase solid solution structure is formed. After laser melting deposition, the structure of two-phase solid solution is transformed into FCC single-phase solid solution, which is mainly composed of 4-6 μm equiaxed crystals and a small amount of cellular crystals. Among them, the coating prepared by powder mechanical alloying rod grinding for 4 h has the highest density, hardness and the best corrosion resistance, and its corrosion resistance is nearly two orders of magnitude higher than that of the coating prepared by powder mechanical alloying rod grinding for 0 h. |
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| Keywords: | mechanical alloying high-entropy alloy laser melting deposition microstructure corrosion resistance |
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