激光熔覆FeCoCrNiMnNb高熵合金涂层的组织及耐磨性
Microstructure and wear behavior of laser cladding FeCoCrNiMnNb high entropy alloy coating
周文婷 1朱春霞 1李凡2
作者信息
- 1. 沈阳建筑大学机械学院,辽宁沈阳 110168
- 2. 沈阳工程学院能源与动力工程学院,辽宁沈阳 110136
- 折叠
摘要
为研究Nb元素对FeCoCrNiMn高熵合金组织及性能的影响,利用激光熔覆技术在Q235钢表面制备FeCoCrNiMnNb高熵合金涂层,分别对涂层的相组成、微观组织、元素分布、纳米硬度及磨损行为进行研究.结果表明:FeCoCrNiMnNb高熵合金涂层由FCC相和Laves相组成.其中,基体相为FCC相,棒状组织为Laves相.由于固溶强化和第二相析出强化效应,FeCoCrNiMnNb高熵合金涂层的纳米硬度显著提升,约为9.193 GPa,约为FeCoCrNiMn涂层的两倍.由于纳米硬度的显著提升,FeCoCrNiMnNb涂层的具有极佳的耐磨性,其磨损率为2.549×105 mm5/N m,约为FeCoCrNiMn涂层的0.33倍.FeCoCrNiMnNb涂层的磨损机制为单一的磨粒磨损.综上所述,FeCoCrNiMnNb高熵合金涂层具有极高的纳米硬度和优异的耐磨性.
Abstract
In order to study the influence of Nb elements on the organization and properties of FeCoCrNiMn high-entropy alloy,FeCoCrNiMnNb high-entropy alloy coatings were prepared on the surface of Q235 steel by using laser cladding technology,and the phase compositions,microstructures,elemental distributions,nano-hardnesses and wear behaviors of the coatings were investigated,respectively.The results show that the FeCoCrNiMnNb high-entropy alloy coating consists of FCC phase and Laves phase.Among them,the matrix phase is the FCC phase and the bar organization is the Laves phase.Due to the solid solution strengthening and the second precipitation strengthening effect,the nanohardness of the FeCoCrNiMnNb high-entropy alloy coating is significantly enhanced to about 9.193 GPa,which is about twice of that of the FeCoCrNiMn coat-ing.Due to the significant enhancement of the nanohardness,the FeCoCrNiMnNb coating has excellent wear resistance,with a wear rate of 2.549× 10-5 mm3/N·m,which is about 0.33 times that of the FeCoCrNiMn coat-ing.The wear mechanism of the FeCoCrNiMnNb coating is a single abrasive wear.In summary,the FeCoCrNiMnNb high-entropy alloy coating has very high nanohardness and excellent wear resistance.
关键词
激光熔覆/FeCoCrNiMnNb高熵合金涂层/Nb/耐磨性/纳米硬度Key words
laser cladding/FeCoCrNiMnNb high entropy alloy coating/wear resistance/Nb/nano-hardness引用本文复制引用
出版年
2024
NETL
NSTL
万方数据