Si含量对氩弧熔覆AlCuFeNiCoSi_(x)高熵合金涂层组织及性能的影响  

Effect of Si Content on Structure and Properties of AlCuFeNiCoSi_(x) High-Entropy Alloy Coating Prepared by Argon Arc Cladding

作　　者：时海芳[1] 李强[1] 刘忆[2] SHI Hai-fang;LI Qiang;LIU Yi(School of Material Science and Engneering,Liaoning Technical University,Fuxin 123000,China;School of Mechanical and Electrical Engineering,Xuzhou Institute of Engineering,Xuzhou 221000,China)

机构地区：[1]辽宁工程技术大学材料科学与工程学院,辽宁阜新123000 [2]徐州工程学院机电工程学院,江苏徐州221000

出　　处：《材料保护》2022年第5期18-22,共5页Materials Protection

摘　　要：高熵合金具有独特的相结构和优异的性能。采用氩弧熔覆技术在Q235钢上制备AlCuFeNiCoSi_(x)高熵合金涂层,探究Si对AlCuFeNiCo高熵合金涂层组织、硬度与耐磨性的影响。结果得出:高熵合金涂层仅由BCC和FCC相结构组成,并没有复杂相出现,随Si含量增加,BCC结构衍射峰强度先减小再增加,组织主要为树枝晶组织,随Si含量增加,枝晶组织先变成棒状枝晶,然后又变成细小致密且不均匀。涂层硬度先减小后增大,然后又减小,当x=0.75时硬度最高,达到62.5 HRC。加入Si含量0.75的涂层耐磨性比未加入Si涂层的提高了26.3%。High-entropy alloys have unique phase structures and excellent properties.In this work,the AlCuFeNiCoSi_(x) high-entropy alloy coating was prepared on Q235 steel using argon-arc cladding technology to investigate the effect of Si on the structure,hardness,and wear resistance of the AlCuFeNiCo high-entropy alloy coating.Results showed that the high-entropy alloy coating was composed of BCC and FCC phases only,and no complex phases were observed.With the increase of Si content,the diffraction peaks of BCC structures,which were mainly dendritic crystals,decreased first and then increased.With the further increase of Si content,the dendritic crystals changed firstly into rod-like crystals and then into small dense and inhomogeneous crystals.Moreover,the hardness of the coating decreased first and then increased,and then decreased again.The hardness reached a maximum value of 62.5 HRC at x=0.75.In terms of wear resistance,the addition of Si at 0.75 increased the wear resistance by 26.3%compared to that without Si.

关 键 词：氩弧熔覆 高熵合金 SI 组织 硬度 耐磨性 

分 类 号：TG174.44[金属学及工艺—金属表面处理]