摘要
应用激光熔覆技术制备了Al CoCrFeNi高熵合金涂层,研究了不同Si C添加量对涂层组织、硬度及耐磨性的影响。结果表明:Al CoCrFeNi高熵合金涂层由面心立方结构(FCC)和体心立方结构(BCC)两相组成。添加Si C生成了Cr2Fe14C相,但是抑制了Cr基FCC相的生成。随着Si C含量的增加,熔覆层的缺陷减少且组织形貌发生改变,主要是由晶内BCC、晶间Cr基FCC相和白色析出物组成,其中,白色析出物为Cr2Fe14C相和未熔化的Si C颗粒,且分布在晶间。Si C的加入可以显著提高涂层的硬度及耐磨性,随着Si C含量的增加,涂层的硬度及耐磨性会随之增加。
Al CoCrFeNi high-entropy alloy coatings were prepared by laser cladding.The effects of different Si C content on the microstructure,hardness and wear resistance of the coatings were studied.The results show that,the Al CoCrFeNi high entropy alloy coating consists of two phases:face centered cubic(FCC)and body centered cubic(BCC).Cr2 Fe14 C phase is generated by adding Si C,but the formation of Cr-based FCC phase is inhibited.With the increase of Si C content,the defects of the cladding layer decrease and the microstructure changes,mainly composed of intra-crystalline BCC phase,intergranular Cr-based FCC phase and white precipitates.Among them,the white precipitates are Cr2 Fe14 C phase and unmelted Si C particles,which are distributed at grain boundary.The hardness and wear resistance of the coating can be improved with the addition of Si C.With the increase of Si C content,the hardness and wear resistance of the coating increases.
作者
冯英豪
李晓峰
刘斌
仪登豪
王行
王帅
白培康
FENG Yinghao;LI Xiaofeng;LIU Bin;YI Denghao;WANG Hang;WANG Shuai;BAI Peikang(School of Materials Science and Engineering,North University of China,Taiyuan 030051,China)
出处
《热加工工艺》
北大核心
2019年第8期160-163,共4页
Hot Working Technology
基金
国家自然科学基金项目(51804280)
山西省自然科学基金项目(201801D221146)
山西省科技重大专项项目(201811-01009)
中北大学青年学术带头人支持计划项目(QX201802)
关键词
激光熔覆
高熵合金
SI
C颗粒
显微组织
laser cladding
high-entropy alloy
SiC particles
microstructure
