TiC增强铁基堆焊层组织与性能的研究  

Study on the microstructure and mechanical properties of TiC/Fe composites coating layer

作　　者：宋思利[1] 王新洪[1] 邹增大[1] 曲仕尧[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：《山东大学学报（工学版）》2004年第2期1-5,共5页Journal of Shandong University（Engineering Science）

基　　金：教育部博士点基金资助项目 (2 0 0 2 0 42 2 0 3 2 ) ;山东省自然科学基金资助项目 (Z2 0 0 0F0 2 )

摘　　要：采用廉价的钛铁、金红石和石墨等原材料 ,通过焊接电弧冶金反应 ,合成TiC超硬质颗粒增强Fe基熔敷层 .利用扫描电镜、X射线衍射、耐磨性试验分析了熔敷层的组织与耐磨性能 .研究结果表明 :TiC颗粒弥散分布在低碳马氏体与残余奥氏体基体上 .熔敷层硬度HRC5 5以上 ,具有很高的耐磨性和良好的抗裂性 .原材料的加入量对堆焊层组织与性能影响很大 ,当钛铁及石墨加入量 (% )分别为 2 5～ 30和 8～ 10时 ,熔敷层具有良好的综合性能 .The microstructure and abrasion resistance of in situ TiC enforced ferrous matrix composites layer synthesized from low-cost ilmenite, rutile and graphite through metallurgy interaction in welding arc have been investigated in this paper. The results show that in situ TiC grains dispersed in matrix compounded of low-carbon martensite and residual austenite. The coating layer possesses high abrasion and crack resistance as well as hardness exceeding HRC55, the microstructure and mechanical properties of which are influenced by the additions of raw materials remarkably. When the additions(%) of ilmenite and graphite are in the ranges of 25～30 and 8～10 respectively, the best integrative mechanical properties of the coating layer can be obtained.

关 键 词：TIC Fe基堆焊层 组织 耐磨性能 

分 类 号：TG0323[金属学及工艺]