Al含量对Al_xCoCrFeNiTi_(0.5)激光涂层组织和耐磨性的影响  

Effects of Al content on microstructure and wear resistance of Al_xCoCrFeNiTi_(0.5) alloy coating prepared by laser cladding

作　　者：张丽[1,2] 沙明红[1,2] 张峻巍[1,2] 陈子尚 李胜利[2] 

机构地区：[1]辽宁科技大学激光先进制造技术研发中心,辽宁鞍山114051 [2]辽宁科技大学材料与冶金学院,辽宁鞍山114051

出　　处：《材料热处理学报》2015年第12期185-189,共5页Transactions of Materials and Heat Treatment

基　　金：国家自然科学基金(51201085);辽宁省科学技术计划资助项目(2012415026);全国大学生创新创业训练计划(201310146014);辽宁科技大学创新团队项目(2104TD02)

摘　　要：采用激光熔覆法制备Al_xCoCrFeNiTi_(0.5)(x=0.2,0.5,1.0,1.5)高熵合金涂层,研究Al含量对涂层组织、硬度及耐磨性的影响。结果表明,随铝含量x变化,相结构由FCC变成BCC结构,并且生成Al_(80_Cr_(13)Co_7和Al95Fe4Cr复杂相。当Al含量增加到1.0时,出现典型调幅分解组织,枝晶和枝晶间成分分布较均匀。随Al含量增加,硬度值提高,最高达到989HV0.5。Al1.0CoCrFeNiTi_(0.5)的耐磨性与U75V相比,磨损量减少了25%,摩擦系数减小了29%。Effects of Al content on microstructure,hardness and wear resistance of AlxCoCrFeNiTi0.5（ x = 0. 2,0. 5,1. 0 and 1. 5） highentropy alloy coating prepared by laser cladding were investigated. The results show that the phase structure can transform from FCC to BCC structure with the increase of Al content,and then Al80Cr13Co7 and Al95Fe4Cr complicated phases are formed. Typical spinodal decomposition structure with uniform composition can be found when x value of Al increases to 1. 0. The hardness value of the alloy coating enhances with increasing Al content,the highest hardness value reaches up to 989 HV0. 5. The abrasion loss of Al1. 0Co Cr Fe Ni Ti0. 5is reduced about 25%,and the friction coefficient is reduced about 29% comparing with that of U75 V alloy.

关 键 词：高熵合金 耐磨性 激光熔覆 微观结构 

分 类 号：TG174.44[金属学及工艺—金属表面处理]