冉启科,徐峰,王波,刘文义,景然,李凡可

• 1:陕西理工大学材料科学与工程学院
• 2:西安重装蒲白煤矿机械有限公司

摘要(Abstract)：

利用激光熔覆技术在Q235钢基体表面制备了AlCoCrFeNi2.1高熵合金涂层，研究了激光功率对涂层组织和性能的影响。通过X射线衍射仪(XRD)、扫描电镜(SEM)、能谱仪(EDS)、维氏显微硬度计、摩擦磨损试验机和电化学工作站等对AlCoCrFeNi2.1高熵合金涂层的显微组织、物相、力学性能及耐蚀性能进行了分析。结果表明：激光熔覆制备的AlCoCrFeNi2.1高熵合金涂层的组织由体心立方(BCC)结构和面心立方(FCC)结构的固溶体相构成；当激光功率大于1200 W时，涂层中BCC(α-Fe)固溶体相逐渐增多，晶粒由等轴晶和柱状树枝晶逐渐转变为细小的等轴晶；随着激光功率的增加，涂层的硬度呈现出先增加后降低的趋势；当激光功率1600 W时，涂层的硬度最大，为403.6 HV0.2,约为基体的2.5倍，此时涂层的耐磨性能达到最优，其磨损率为0.39×10~(-5) g·N~(-1)·m~(-1),自腐蚀电流密度最小，为5.23×10~(-9) A·cm~(-2),耐腐蚀性能最好。

关键词(KeyWords)： AlCoCrFeNi2.1高熵合金;微观组织;耐磨性;耐腐蚀性

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51701111)

作者(Author): 冉启科,徐峰,王波,刘文义,景然,李凡可

DOI: 10.13289/j.issn.1009-6264.2024-0090

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