(华中理工大学材料科学与工程学院， 武汉430074)
摘 要: 系统地研究了化学成分对原位TiCp/Fe复合材料组织和性能的影响，并确定了该材料的最佳化学成分。结果表明：Ti是影响复合材料组织中TiC颗粒形核率的关键因素, 而C主要影响组织中TiC颗粒的尺寸；在合金熔体中，加入一定量的Si有利于TiC颗粒的形成，而Mn主要用来细化珠光体基体。
关键字: TiCp/Fe复合材料 原位反应 化学成分
（College of Materials Science and Engineering,Huazhong University of Science and Technology, Wuhan 430074, P. R. China）
Abstract:The effects of chemical composition on microstructures and mechanical properties of in-situ TiCp/Fe composites have been studied systematically, and the optimum chemical composition of this composite has also been determined. The results showed that Ti is the key factor affecting the nucleating rate of TiC particulates, and C mainly affects the sizes of TiC particulates in the composite microstructures. Adding proper Si content to alloy melt is favourable to form TiC particulates, and Mn is mainly used to refine pearlite matrix.
Key words: TiCp/Fe composite in-situ reaction chemical compostion
