C/Ti原子比对前驱体碳化复合等离子熔覆TiC/Fe复合涂层的影响  

Influence of C/Ti atomic ratio on TiC/Fe composites coating using sucrose as a carbonaceous precursor by plasma cladding

作　　者：刘均波[1] 姜军生[1] 谭志强[2] 刘均海[3] 

机构地区：[1]潍坊学院机电系,山东潍坊261061 [2]潍坊学院信控系,山东潍坊261061 [3]北京科技大学材料学院,北京100083

出　　处：《金属热处理》2008年第6期50-53,共4页Heat Treatment of Metals

基　　金：山东省自然科学基金项目(Y2002F12);山东省科技攻关项目(2007GG30003003)

摘　　要：以钛铁粉和碳的前驱体(蔗糖)为原料通过前驱体碳化复合技术制备了Ti-Fe-C等离子熔覆复合粉末,并通过等离子熔覆技术在普通低碳钢表面成功地原位合成了TiC/Fe陶瓷金属复合涂层。着重研究了不同C/Ti原子比对等离子熔覆TiC/Fe复合涂层的相组成、显微结构和硬度的影响。结果表明,前驱体碳化复合技术制备的Ti-Fe-C系等离子熔覆复合粉末中C/Ti原子比是影响涂层相组成、显微结构和硬度的关键因素。C/Ti原子比不同,涂层的相组成和硬度不同;随着C/Ti原子比增大,涂层中TiC团聚富集区增大,涂层的孔隙率也随之增大。Ti-Fe-C composite powder for plasma cladding was prepared by precursor carbonization-composition process using ferrotitanium powder and precursor-sucrose as raw materials. TiC/Fe composite coatings were in situ synthesized on the surface of low carbon steel by plasma cladding process. The influence of C/Ti atomic ratio on the component, microstructure and hardness of the composite coatings was investigated. Results show that C/Ti atomic ratio has strong influence on the component, microstructure and hardness of TiC/Fe composite coating. The component, microstrueture and hardness of the coating changed along with different C/Ti atomic ratio. The size of TiC aggregate zone and porosity of TiC/Fe composite coating increase with the increase of the C/Ti atomic ratio.

关 键 词：前驱体 等离子熔覆 TiC/Fe复合涂层 C/Ti原子比 

分 类 号：TG174.44[金属学及工艺—金属表面处理]