氩弧熔敷原位合成(Ti,Nb)C增强金属基复合涂层组织与抗磨性能  

Microstructure and wear resistance of(Ti,Nb)C reinforced composite coating in-situ synthesized by argon arc cladding

作　　者：王永东[1] 李柏茹[1] 王淑花[1] 刘兴[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150022

出　　处：《焊接学报》2012年第3期61-64,116,共4页Transactions of The China Welding Institution

基　　金：黑龙江省教育厅科学技术资助项目(11551419)

摘　　要：以钛粉、碳粉、铌粉和Ni60A粉末为原料,利用氩弧熔敷技术在16Mn钢基材表面成功制备出镍基增强相复合涂层,应用OM,SEM,XRD对复合涂层的显微组织和物相进行了分析,并测试了不同载荷作用下的磨损性能.结果表明,熔敷层与基体结合无气孔、裂纹等缺陷,呈冶金结合,复合涂层物相由(Ti,Nb)C颗粒、γ-Ni奥氏体枝晶和枝晶间的Cr23C6共晶组织组成.随着载荷增加复合涂层磨损质量损失缓慢增大,16Mn钢磨损质量损失迅速增大,熔敷涂层的耐磨性较基体提高近11倍,其磨损机制主要为擦伤式磨损.Ni-based reinforced composite coating was prepared on the surface of 16Mn steel by means of argon arc cladding technique with the pre-alloyed powders of Ni60A,Nb,Ti and C.The microstructure of the composite coating was examined with OM,SEM and XRD,and the abrasion property of the coating was measured under different loads.The results showed that metallurgical bonding between the coating and the substrate occurred without defects like pores and cracks.The microstructure of the composite coating consisted of(Ti,Nb)C particles,γ-Ni austenite dendrites and Cr23C6 eutectics.With the increase of load at room temperature,the weight loss during abrasion of the composite coating increased slowly,whereas that of 16Mn steel increased remarkably.The wear resistance of the composite coating was 11 times higher than that of the substrate.

关 键 词：氩弧熔敷 复合涂层 原位合成 抗磨性能 

分 类 号：TG174[金属学及工艺—金属表面处理]