| 激光熔覆AlxNbMn2FeMoTi0.5高熵合金涂层的组织与性能 |
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| 引用本文： | 张彝,谷臻,高帅龙,席生岐.激光熔覆AlxNbMn2FeMoTi0.5高熵合金涂层的组织与性能[J].金属热处理,2021,46(6):146-152. |
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| 作者姓名： | 张彝 谷臻 高帅龙 席生岐 |
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| 作者单位： | 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 |
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| 基金项目： | 海洋腐蚀与防护重点实验室开放研究基金(6142901180402) |
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| 摘 要： | 使用激光熔覆技术在Q235钢基体上制备AlxNbMn2FeMoTi0.5高熵合金涂层,期望借此提高干切削技术适用刀具表层的硬度和耐磨性。经过初步筛选之后,主要研究了AlxNbMn2FeMoTi0.5(x=1、1.5、2)高熵合金涂层体系,并采用XRD和3D激光扫描成像等手段分析了不同Al含量的AlxNbMn2FeMoTi0.5合金涂层的晶相结构、显微组织和具体元素分布。结果显示,对于AlxNbMn2FeMoTi0.5高熵合金涂层,随着Al含量的增加,涂层的相结构由单一的BCC相逐渐转变为双相BCC结构,晶粒逐渐细化。当x=2时,AlxNbMn2FeMoTi0.5高熵合金涂层硬度最高,平均为1089.6 HV0.3,大约为基材的5倍,且其具有最优的耐磨损性能。x=1.5时,AlxNbMn2FeMoTi0.5高熵合金涂层的自腐蚀电位最高,自腐蚀电流密度最小,耐腐蚀性最好。
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| 关 键 词： | 高熵合金 激光熔覆 涂层 组织结构 硬度 耐磨性 耐蚀性 |
| 收稿时间： | 2020-12-22 |
Microstructure and properties of laser clad AlxNbMn2FeMoTi0.5 high-entropy alloy composite coatings |
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| Zhang Yi,Gu Zhen,Gao Shuailong,Xi Shengqi.Microstructure and properties of laser clad AlxNbMn2FeMoTi0.5 high-entropy alloy composite coatings[J].Heat Treatment of Metals,2021,46(6):146-152. |
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| Authors: | Zhang Yi Gu Zhen Gao Shuailong Xi Shengqi |
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| Affiliation: | State Key Laboratory for Mechanical Behavior, School of Materials Science and Engineering, Xi'an Jiaotong University, Xi'an Shaanxi 710049, China |
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| Abstract: | Laser cladding technology was used to prepare the AlxNbMn2FeMoTi0.5 high-entropy alloy coatings on the Q235 steel substrate. It was expected to improve the hardness and the wear resistance of the surface layer of cutting tool suitable for dry cutting technology. After preliminary selecting, the AlxNbMn2FeMoTi0.5 (x=1,1.5,2) high-entropy alloy coating system was mainly studied, and the phase structure, microstructure and specific element distribution of the AlxNbMn2FeMoTi0.5 alloy coatings with different Al content were analyzed by means of XRD and 3D laser scanning imaging. The results show that for the AlxNbMn2FeMoTi0.5 high-entropy alloy coatings, with the continuous addition of Al, the phase structure of the coating gradually evolves from a single BCC phase to a dual-phase BCC structure, and the grains are gradually refined. When x=2, the AlxNbMn2FeMoTi0.5 high-entropy alloy coating reaches the highest hardness, with an average of 1089.6 HV0.3, which is about 5 times of that of the base material, and it has the best wear performance.When x=1.5, the AlxNbMn2FeMoTi0.5 high-entropy alloy coating reaches the highest self corrosion potential and the lowest self corrosion current density, and has the best corrosion resistance. |
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| Keywords: | high-entropy alloy laser cladding coating microstructure hardness wear resistance corrosion resistance |
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