摘要
为提升Q235钢的耐磨损性能,采用激光熔覆在Q235基体表面堆焊Ni/316L涂层,并进行了680℃不同保温时间的热处理。采用扫描电子显微镜(SEM)、能谱仪(EDS)、显微硬度计研究堆焊层的显微组织、硬度和弹性模量。结果表明,激光熔覆层的孔隙率低,其组织主要以垂直于基体的针状树枝晶生长;热处理后组织从针状树枝晶转变为细小等轴晶;不同时间热处理后堆焊层最大硬度均出现在熔合区;热处理可以在一定程度上提升堆焊层的弹性模量。
In order to improve the wear resistance of Q235 steel,a Ni/316L coating was coated on Q235 surface by laser cladding and the heat treatment at 680℃for different time was carried out.Scanning electron microscope(SEM),energy dispersive spectrometer(EDS),microhardness tester were used to study the microstructure,microhardness and elastic modulus of the coating.The results show that the laser cladding layer has low porosity,and the mirostructure is mainly grown in the form of needle like dendrite perpendicular to the substrate.The microstructure changes from acicular dendrites to fine equiaxed grains after heat treatment.The maximum hardness of the surfacing layer appears in the fusion zone after different time of heat treatment.The heat treatment can improve the elastic modulus of the surfacing layer in a certain content.
作者
王浩
李欣
曲玉龙
董会
WANG Hao;LI Xin;QU Yulong;DONG Hui(Changqing Drilling Corporation,CNPC Chuanqing Drilling Engineering Co.,Ltd.,Xi'an 710018,China;Drilling and Production Engineering Research Institute,CNPC Chuanqing Drilling Engineering Co.,Ltd.,Xi'an 710018,China;Xi'an Key Laboratory of High Performance Oil and Gas Field Materials,School of Material Science and Engineering,Xi'an Shiyou University,Xi'an 710065,China)
出处
《热加工工艺》
北大核心
2022年第9期40-42,51,共4页
Hot Working Technology
