摘要
针对核工业阀门材料Deloro40镍基合金耐磨性急需改善的问题,采用激光增材制造技术通过添加不同质量分数的Mo元素,探究Mo元素对Deloro40镍基合金组织和耐磨性的影响。结果表明,Mo元素的添加促进了Mo_(2)C、Mo_(2)O和Ni_(3)Si_(2)物相的生成。随着Mo元素的增加,晶粒尺寸细化和组织中生成的硬质相Mo_(2)C使合金硬度得到提高;试样磨损率均呈现先增加后减小的趋势,在摩擦过程中生成的MoO_(2)起到润滑作用,降低磨损率。当添加5%Mo试样时,在25℃和400℃工况下合金均表现出优异的耐磨性。
Focus on the urgent need to improve the wear resistance of Deloro40nickel-based alloy,which is a valve material in the nuclear industry,this paper uses laser additive manufacturing technology to explore the effect of Mo on the microstructure and wear resistance of Deloro40nickel-based alloy by adding different contents of Mo.Results show that the addition of Mo promotes the formation of Mo_(2)C,Mo_(2)O and Ni_(3)Si_(2)phases.With the increase of Mo content,fine grain size and hard phase Mo_(2)C formed in microstructure improve the hardness of the alloy.The wear rate of samples increased first and then decreased.MoO_(2)generated in the friction process played a lubrication role,which reduced the wear rate.It shows excellent wear resistance at 25℃and 400℃when 5%Mo was added.
作者
熊锋
刘乾峰
张敏
陈长军
Xiong Feng;Liu Qianfeng;Zhang Min;Chen Changjun(School of Mechanical and Electric Engineering,Soochow University,Suzhou,Jiangsu215021,China)
出处
《应用激光》
CSCD
北大核心
2022年第5期51-57,共7页
Applied Laser
基金
江苏省“333工程”科研资助(BRA2017098)。
