Si含量对激光熔覆Ni基涂层组织与性能的影响  

Effect of Silicon Content on Microstructure and Properties of Laser Cladding Ni-based Coatings

作　　者：史威[1,2] 刘晓鹏[1,2] 罗振光 杨帆[1,2] 胡启江[1,2] 周骞[1,2] 张培磊[1,2] 

机构地区：[1]上海工程技术大学材料工程学院,上海201620 [2]上海工程技术大学高强激光智能加工装备关键技术产学研开发中心,上海201620

出　　处：《热加工工艺》2016年第12期120-122,共3页Hot Working Technology

基　　金：上海市自然科学基金(12ZR1444500);上海市科委地方高校能力建设项目(13160501200);上海市教委创新项目(14YZ139);上海工程技术大学校基金(2012gp21);上海工程技术大学大学生重点科研平台创新训练项目(cz1405006)

摘　　要：利用激光熔覆技术在纯铜表面制备了Ni-Cr-Si涂层,利用光学显微镜、扫描电镜、X射线衍射和能谱仪分析了不同Si含量对激光熔覆涂层组织和性能的影响。结果表明:涂层相组成主要是Cr_2Ni_3、γ-Ni、Cr_3Ni_5Si_2。Ni含量一定时,随Si含量增加,涂层稀释率减小,成形稳定性降低,Cr_2Ni_3相数量减小,Cr_3Ni_5Si_2相数量提高,硬度提高。Ni-Cr-Si intermetallic composite coatings were made by laser cladding on copper. The effects of silicon content on the microstructure and properties of laser cladding Ni-based coatings were characterized by OM, SEM, XRD and EDS. The results indicate that the coatings are composed of Cr3Ni5Si2, Cr2Ni3, γ-Ni phases. Under a certain Ni content, the increase of the addition of Si could reduce the dilution rate of the coating, deteriorate the stability of the coatings, then, the the amounts of Cr2Ni3 phases decrease, the amounts of Cr3Ni5Si2 phases increase, and the hardness increases.

关 键 词：激光熔覆 Ni基 摩擦磨损 Cr3Ni5Si2 

分 类 号：TG115[金属学及工艺—物理冶金]