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2.549×10^(-5)mm^(3)/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。
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,nanohardnesses 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 coating.Due to the significant enhancement of the nanohardness,the FeCoCrNiMnNb coating has excellent wear resistance,with a wear rate of 2.549×10^(-5) mm^(3)/N·m,which is about 0.33 times that of the FeCoCrNiMn coating.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.
作者
周文婷
朱春霞
李凡
ZHOU Wenting;ZHU Chunxia;LI Fan(School of Mechanical Engineering,Shenyang Jianzhu University,Shenyang 110168,China;School of Energy and Power Engineering,Shenyang Institute of Engineering,Shenyang 110136,China)
出处
《粉末冶金工业》
北大核心
2024年第5期105-110,共6页
Powder Metallurgy Industry
基金
辽宁省教育厅科学研究经费项目(LJKQZ20222302)
