Si含量对激光合金化TiC／CrxCy陶瓷涂层组织性能影响的研究  

Research on Effects of Si Content on Microstructure and Performance of TiC/Cr_xC_y Laser Alloyed Coating

作　　者：王沛[1,2] 王文焱[1,2] 吴宇[1,2] 徐晶[1,2] 谢丰豪[1,2] 唐琴[1,2] 张航宇[1,2] 

机构地区：[1]河南科技大学材料科学与工程学院,河南洛阳471003 [2]河南省有色金属材料科学与加工技术重点实验室河南洛阳471003

出　　处：《应用激光》2010年第4期318-322,共5页Applied Laser

基　　金：河南科技大学大学生研究训练计划项目(项目编号:2009008);河南科技大学博士科研启动基金项目;河南省基础与前沿技术研究计划项目(项目编号:D923DD41DD49)

摘　　要：实验涂层材料以亚微米级TiC和Cr_xC_y为强化硬质相,Fe-Cr合金为其基础粘结相,并加入特定含量的Si元素,运用激光合金化技术,在球墨铸铁表面制备出高硬度的合金化层。利用XRD、SEM、EDS等分析不同Si含量激光合金化层的相组成及显微组织,并测试其维氏硬度。结果表明:激光合金化层表面平整,并与基体实现了良好的冶金结合,形成以莱氏体与马氏体为主的显微组织;随着硅含量的提高,相和组织发生了一定变化,合金化层硬度也随之提高。In this research,the high hardness alloyed coating was prepared on the surface of ductile iron adopting laser alloying process, using the bonding phase of Fe-Cr alloy combined with the hardening phase of sub-micron TiC and CrxCy and a certain mass fraction of silicon. The microstructure of the laser alloying layer with different Si content was characterized by XRD, SEM, EDS. The vickers hardness of the laser alloying layer was examined. The results show that the flat alloyed coating combines metallurgically with the substrate after adopting laser alloying process. The main structures of the laser alloying layer are ledeburite and martensite. The variation of Si content has a certain effect on its phase and structure,and the hardness of the alloy layer is improved with the increase of Si content.

关 键 词：SI含量 激光合金化 显微组织 维氏硬度 

分 类 号：TN305.3[电子电信—物理电子学]