真空实型铸渗法制备自生TiC颗粒增强钢基表面复合材料的组织研究  

Microstructure of In-Situ TiC Particles Reinforced Steel Matrix Surface Composites Prepared by V-EPC

作　　者：刘旋[1] 李祖来[1] 蒋业华[1] 羊浩[1] 周荣[1] 

机构地区：[1]昆明理工大学机电工程学院,云南昆明650093

出　　处：《铸造》2009年第4期341-343,348,共4页Foundry

基　　金：国家自然科学基金项目(50871048);教育部科学技术研究重点项目(208130);云南省教育厅基金项目(07y40602)

摘　　要：为了优化自生TiC颗粒增强表面复合材料的工艺参数,利用真空实型铸渗(V-EPC)方法制备了自生TiC颗粒增强钢基表面复合材料,重点研究了Ti-C和Ti-C-Fe两种自蔓延反应体系的复合材料组织。结果表明,两种体系制备的复合材料复合层均由TiC颗粒和α-Fe组成;Ti-C体系在铸渗的作用下能形成复合层,其厚度为2.9mm,小于预制块的厚度(4mm);Ti-C-Fe体系所获得的复合层厚度与预制块厚度相近。从过渡层到复合层表面,两种体系复合层中颗粒都呈逐渐长大的趋势,Ti-C体系比Ti-C-Fe体系长大的趋势更明显,生成的颗粒也更粗大。In order to optimize the processing parameters of TiC/Fe composite fabrication, in-situ steel matrix surface composites reinforced by TiC particles were prepared by vacuum evaporative pattern casting（V-EPC） process, and microstructures of the composites of Ti-C and Ti-C-Fe self-propagating reaction systems were studied. The results show that, both the composite layers consist of TiC particles and α-Fe for two systems; for the Ti-C system, thickness of the surface composite layer, 2.9 mm, is smaller than that of the preform, 4 mm, however, for the Ti-C-Fe system, they are close to each other; the TiC particles coarsen gradually from transition layer to composite layer for both systems; however, the tendency is more obvious for Ti-C system than Ti-C-Fe system, meanwhile, TiC particles are more coarse.

关 键 词：组织 V-EPC 自蔓延 TIC 表面复合材料 

分 类 号：TB331[一般工业技术—材料科学与工程]