FeCoCrNiAl高熵合金涂层的等离子熔覆工艺研究
Research on Plasma Cladding Process of FeCoCrNiAl High Entropy Alloy Coating
毛建军 1许启民 2赵禹 2张成林 3滕常青 1辛虹阳 1吴璐1
作者信息
- 1. 中国核动力研究设计院第一研究所, 四川 成都 610041
- 2. 安徽工程大学 高性能有色金属材料安徽省重点实验室,安徽 芜湖 241000
- 3. 安徽拓宝增材制造科技有限公司, 安徽 芜湖 241200
- 折叠
摘要
采用等离子熔覆技术在 45 号钢基体表面制备FeCoCrNiAl高熵合金涂层,研究熔覆电流和离子气流量对涂层表面形貌及孔隙率的影响.结果表明,当熔覆电流为 180 A、离子气流量为2.5 L/min、熔覆速度为 100 cm/min时,制备出的FeCoCrNiAl合金涂层与基体结合良好、无裂纹,孔隙率达到最低值0.0276%.该工艺制备的FeCoCrNiAl合金涂层高熵效应显著,但组织中除了具有BCC结构相以外,还存在具有FCC结构的Fe-Cr相、Ni-Co相、富Ni相、富Al相等成分.FeCoCrNiAl高熵合金涂层的显微硬度为500 HV,达到45 钢基体的2 倍以上.
Abstract
FeCo CrNiAl high entropy alloy coating was prepared on 45 steel through plasma cladding.The influence of cladding current and plasma gas velocity on the microstructure and porosity of the coating was studied.The results show that,when the cladding current is 180 A,the plasma gas velocity is 2.5 L/min,and the cladding rate is 100 cm/min,the prepared FeCoCrNiAl alloy coating binds well with the substrate,has no crack and the lowest porosity of 0.0276%.The high entropy effect of FeCoCrNiAl alloy coating by this process is significant.However,the microstructure of the coating not only has a BCC phase but also has some FCC phases including Fe-Cr phase,Ni-Co phase,Al-rich phase,Ni-rich phase.The Vickers hardness of the FeCoCrNiAl high entropy alloy coating is 500 HV,which is twice as much as that of 45 steel substrate.
关键词
高熵合金/等离子熔覆/涂层/孔隙率/硬度Key words
high entropy alloy/plasma cladding/coating/porosity/hardness引用本文复制引用
基金项目
安徽省自然科学基金(2008085QE197)
安徽工程大学-繁昌区产业协同创新专项(2021FCCYXTB3)
出版年
2024
NETL
NSTL
万方数据