激光熔覆Fe基TiC涂层的组织与性能  

Microstructure and properties of Fe-based TiC laser cladding coatings

作　　者：王植[1] 雷剑波[1] 姜伟[1] 孙亚娟[1] 方艳[1] 王云山[1] 

机构地区：[1]天津工业大学激光技术研究所,天津300387

出　　处：《粉末冶金材料科学与工程》2016年第1期43-49,共7页Materials Science and Engineering of Powder Metallurgy

基　　金：国家自然科学基金资助项目(61475117);国家自然科学资金委员会与中国民用航空局联合资助项目(U1333121);天津市应用基础及前沿技术研究计划项目(12JCQNJC02800);天津市科技支撑重大专项(13ZCZDGX01109)

摘　　要：采用激光熔覆方法在45#钢基体上制备含TiC质量分数为20%~50%的Fe基TiC复合涂层。分别用扫描电镜（SEM）、能谱仪（EDS）、X线衍射（XRD）、显微硬度计、摩擦磨损机对熔覆层的微观组织、物相、硬度及耐磨性进行研究。结果表明：当TiC质量分数为30%时,涂层组织致密,TiC颗粒分布均匀、部分溶解、尺寸减小;涂层主要是由α-Fe固溶体,Fe C,Fe B,B4C,B4Si,Cr5B3,Ti B以及未溶解的TiC等组成;当TiC质量分数为30%时,熔覆层平均维氏硬度为783.8,磨损率为45#钢基体的1/38。Fe-based TiC coatings with TiC mass fraction of 20%-50% was deposited by laser cladding technology on 45？steel substrate. Scanning electron microscope（SEM）, energy dispersive spectrometer（EDS）, X-ray diffraction（XRD）, microhardness tester, friction wear testing machine were used to investigate the microstructure, phases, microhardness and wear resistance of the coatings. The results show that when the coatings contain 30% TiC, the coating structure is compact, TiC particles in the coating are distributed uniformly and partly dissolve, and the size of TiC particle decreases. The coatings are mainly composed of α-Fe, Fe C, Fe B, B4 C, B4 Si, Cr5B3, Ti B and undissolved TiC. Coating＇s average microhardness is 783.8 and the rate of wear is 1/38 of 45 steel substrate when the contents of TiC is 30%.

关 键 词：激光熔覆 Fe基 TiC熔覆层 显微组织 硬度 耐磨性 

分 类 号：TG665[金属学及工艺—金属切削加工及机床]