TA2表面电火花沉积NiCr涂层的界面行为  

Interface behavior of NiCr coating on TA2 produced by electrospark deposition

作　　者：孙凯伟[1] 于华[1] 吴公一 张占领[1] 张萌[1] 朱志伟[1] 

机构地区：[1]河南科技大学材料科学与工程学院有色金属共性技术河南省协同创新中心,河南洛阳471003

出　　处：《焊接技术》2015年第4期10-12,27,共3页Welding Technology

基　　金：国家自然科学基金(U1294520);河南省杰出青年科学基金(074100510011);河南科技大学青年基金项目(2006QN049);洛阳市科技攻关项目;河南科技大学大学生研究训练计划(SRTP)项目(2011067)

摘　　要：以NiCr合金为电极，在TA2表面通过电火花沉积技术制备了NiCr合金强化涂层，用显微硬度计考察了涂层的断面显微硬度．并通过扫描电镜（SEM）、能谱（EDS）、X射线衍射（XRD）等表征了涂层的微观结构。结果表明：涂层主要由NiTi2，Cr4Ni15Ti,Cr1.75Ni0.25Ti及NiTi等相组成，涂层厚度约为40-70μm，涂层与基体形成了良好的冶金结合。涂层显微硬度高达HV620，涂层具有较好的耐磨性。NiCr coating on pure titannium(TA2) was deposited by electrospark deposition using the NiCr electrode,the microhardness had been studied by micro-hardness tester,the microstructure had been studied by scaning electron microscopy(SEM),energy dispersion spectrum(EDS) and X-ray diffraction(XRD).The results showed that the coating contained several phases like NiTi2,Cr4Nil5 Ti,Crl.75 NiO.25Ti and NiTi.The thickness of the coating was about 40 ~70 μm,good metallurgical combination between coating and substrate appeared.The microhardness of the coating had reached up to HV620,the coating had good wear resistance.

关 键 词：电火花沉积 TA2 NICR涂层 界面行为 

分 类 号：TG174.44[金属学及工艺—金属表面处理]