激光熔覆原位自生TiB_2-TiC/FeCrSiB复合涂层研究  

Investigation on in situ synthesis of TiB_2-TiC/FeCrSiB composite coatings by laser cladding

作　　者：杜宝帅[1] 邹增大[1] 王新洪[1] 李清明[1] 

机构地区：[1]山东大学材料科学与工程学院,山东济南250061

出　　处：《应用激光》2007年第4期269-272,共4页Applied Laser

基　　金：教育部博士点基金项目(项目编号:060422020)

摘　　要：为提高钢基材料表面耐磨性能,采用激光熔覆技术制备了原位自生(TiB2-TiC)增强铁基熔覆层。采用X射线衍射仪,金相显微镜,SEM,EPMA,研究了涂层的组织结构,利用显微硬度计测试了涂层的显微硬度。研究结果表明,通过B4C和钛铁之间的反应可以原位生成陶瓷增强相TiB2和TiC,二者的微观形貌有显著差异,TiB2呈棒条状,TiC呈块状和花瓣状。同被强化基体及FeCrSiB熔覆层相比,熔覆层显微硬度有明显提高。In order to improve the wear resistance of steel components, in situ ,synthesized particulate reinforced ferrous based coatings were produced by laser cladding. XRD, OM, SEM, and EMPA were used to investigate the phases and microstructure. Microhardness was also tested. Results show that ceramic reinforcements of TiB2 and TiC can be synthesized through the reaction of B4 C and ferrotitanium. TiB2 shows the shape of strip, while TiC takes on the shape of block and flower. Compared with the steel substrate and the FeCrSiB coating, the microhardness of the TiB2- TiC/FeCrSiB coatings improved dramatically.

关 键 词：激光熔覆 原位自生 TiB2+TiC 

分 类 号：TB331[一般工业技术—材料科学与工程] TG159.9[金属学及工艺—热处理]