45^#钢表面NiCrBSi合金激光熔敷层的组织和硬度  

Microstructure and microhardness of NiCrBSi alloy laser cladding layer on 45# steel substrate

作　　者：孙荣禄[1] 王云山[1] 唐英[1] 杨洗陈[1] 

机构地区：[1]天津工业大学激光技术研究所,天津300160

出　　处：《天津工业大学学报》2003年第5期79-81,共3页Journal of Tiangong University

基　　金：天津市高等学校科技发展基金项目资助(020418).

摘　　要：为提高45#钢表面硬度及耐磨性能,采用激光熔敷技术在其表面制备NiCrBSi合金涂层,利用X射线衍射仪、扫描电镜和透射电镜分析了熔敷层的微观组织,利用显微硬度计测试了熔敷层的硬度.结果表明,激光熔敷层的组织由γ-Ni树枝晶、γ-Ni+Ni3B共晶、M7C3树枝晶和CrB颗粒组成,激光熔敷层的硬度在HV800～900之间.In order to improve 45# stell surface hardness and wear resistant property of laser cladding layer, laser cladding of NiCrBSi alloy layer on 45# steel substrate was carried out. The microstructure of laser clad layer was analyzed by means of XRD, SEM and TEM. The microhardness of laser cladding layer was measured by using microhardness meter. It is shown that the microstructure of laser clad layer is consisted of dendrites of γ-Ni, eutectics of γ-Ni+Ni3B, M7C3 dendrites and CrB particles, and the microhardness of laser clad layer is distributed within HV800—900.

关 键 词：激光熔敷 NICRBSI合金 显微组织 显微硬度 

分 类 号：TG156.99[金属学及工艺—热处理]