Al添加量对无钴高熵合金涂层组织结构和耐磨性的影响  

Effect of Al addition on microstructure and wear resistance of Co-free high-entropy alloy coatings

作　　者：魏仕勇[1] 王超敏 彭文屹[2] 谌昀[1] 罗儒凯 刘文政 Wei Shiyong;Wang Chaomin;Peng Wenyi;Chen Yun;Luo Rukai;Liu Wenzheng(Institute of Applied Physics,Jiangxi Academy of Sciences,Nanchang Jiangxi 330029,China;School of Physics and Materials Science,Nanchang University,Nanchang Jiangxi 330090,China)

机构地区：[1]江西省科学院应用物理研究所,江西南昌330029 [2]南昌大学物理与材料学院,江西南昌330090

出　　处：《金属热处理》2023年第11期276-281,共6页Heat Treatment of Metals

基　　金：江西省科技对外合作项目(20203BDH80W008);江西省科学院省级科技计划项目包干制项目(2021YSBG22003);江西省科学院博士引进项目(2022YYB19)。

摘　　要：通过等离子转移弧焊技术在Q235钢基体上制备了无钴Al_(x)CrFeMnNi高熵合金(HEA)涂层(x=0.2,0.4,0.6,0.8,1)。研究了Al的加入对HEA涂层的相组成、组织和力学性能的影响。结果表明,由于高熵效应,Al_(x)CrFeMnNi HEA涂层主要由简单的BCC和FCC相以及少量碳化物相组成。此外,Al元素的加入抑制了FCC相的形成。随着Al添加量的增加,枝晶间明显粗化。当Al添加量为0.8时,HEA涂层平均维氏硬度为386.5 HV0.2,平均摩擦因数为0.595,耐磨性能最稳定。Al_(x)CrFeMnNi high-entropy alloy coatings(x=0.2,0.4,0.6,0.8,1)were successfully prepared on a Q235 steel substrate by plasma transfer arc.The influence of Al addition on the phase constituent,microstructure,and mechanical properties of the HEA coatings was investigated.The results show that,due to the high-entropy effect,the Al_(x)CrFeMnNi HEA coatings are mainly composed of simple BCC and FCC phases and a small amount of carbide phases.Moreover,the Al addition inhibits the formation of FCC phases,and the inter-dendritic areas are significantly increased with the increase of Al content.When the Al addition is 0.8,the average Vickers hardness of the HEA coating is 386.5 HV0.2,average friction coefficient is 0.595,and the most stable wear resistance is obtained.

关 键 词：无钴高熵合金 等离子熔覆 Al添加量 组织 耐磨性 

分 类 号：TG113[金属学及工艺—物理冶金]