原位合成TiN增强Ni基复合涂层的组织与性能  

Microstructure and performance of in-situ synthesis TiN particle reinforced Ni-matrix composite coating

作　　者：王振廷[1] 郑维[1] 周晓辉[1] 

机构地区：[1]黑龙江科技学院材料科学与工程学院,哈尔滨150027

出　　处：《焊接学报》2011年第3期93-96,118,共4页Transactions of The China Welding Institution

基　　金：黑龙江省教育厅重点基金资助项目(11511353)

摘　　要：以Ti,BN和Ni粉为原料,在Q345D钢表面采用氩弧熔敷技术制备了TiN增强Ni基复合涂层.利用扫面电镜(SEM)和X射线衍射仪(XRD)对复合涂层的显微组织进行了分析,TiN颗粒呈球形、不规则椭球状和枝晶状,并对其形貌特征进行了解释.利用显微硬度计和摩擦磨损试验机,对复合涂层的相关性能进行了测试和分析.涂层表面平均硬度达到了840 HV.结果表明,磨损机制主要为磨粒磨损,伴随着粘着磨损,硬质点颗粒的分布提高了基体的耐磨性能.Ni-based composite coating reinforced by TiN particles were prepared on the surface of Q345D steel by means of argon arc cladding technique using Ti,BN and Ni powders as raw materials.The microstructure of the clad layer was observed by scanning electron microscope(SEM) and X-ray diffraction analysis(XRD).The TiN exhibited sphericity,irregular ellipse and dendrite shapes.The performance of coating were investigated by microhardness test and friction & wear machine.The average hardness of coating was about 840 HV.The argon arc clad composite coating had high hardness and excellent wear resistance under dry sliding wear test conditions.

关 键 词：氩弧熔敷 原位合成 复合涂层 耐磨性能 

分 类 号：TG174.44[金属学及工艺—金属表面处理]