激光熔覆Ni-W-Si涂层的组织与性能  

Microstructure and Properties of Ni-W-Si Composite Coating by Laser Cladding

作　　者：李国凯[1,2] 张培磊[1,2] 卢云龙[1,2] 高杰[1,2] 刘晓鹏[1,2] 闫华[1,2] 

机构地区：[1]上海工程技术大学材料工程学院 [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

出　　处：《特种铸造及有色合金》2015年第3期307-310,共4页Special Casting & Nonferrous Alloys

基　　金：国家自然科学基金资助项目(51405288);上海市自然科学基金资助项目(12ZR1444500;13ZR1455400);上海市科委地方高校能力建设资助项目(13160501200);上海市教委创新资助项目(14YZ139;13YZ113);上海工程技术大学校基金资助项目(2012gp21;2012gp20);上海工程技术大学研究生创新资助项目(14KY0509);上海市大学生创新训练资助项目(cs1305003)

摘　　要：以Ni-W-Si合金粉末为原料,利用激光熔覆技术在45号钢表面上制备了复合涂层,使用SEM、XRD与EDS等方法对涂层的显微组织、相组成进行了分析,讨论了不同W含量对涂层室温干滑动摩擦条件下耐磨性的影响。结果表明,W、W5Si3、WSi2及(Fe,Ni)固溶体使涂层的显微硬度显著提高(最高达1 040 HV),随着W含量降低,涂层的硬度下降,磨损加快。Ni-W-Si intermetallic composite coatings were prepared by laser cladding on 45 steel with NiW-Si alloy powder as raw materials.Microstructure and composition of the coatings fabricated were characterized by SEM,XRD and EDS.Effects of W content on the hardness and wear resistance of the composite coatings were investigated in condition of dry sliding at room temperature.The results indicate that the coatings prepared with high handness can be attributed to the phases such as W、W5Si3、WSi2and（Fe,Ni）solid solution（the maximum hardness reaches 1 040HV）.The hardness of the coatings is decreased and wear loss is increased with the increase of W content in coatings.

关 键 词：涂层 激光熔覆 微观组织 磨损 

分 类 号：TG174.4[金属学及工艺—金属表面处理]