(華中理工大學材料科學與工程學院， 武漢430074)
摘 要: 系統(tǒng)地研究了化學成分對原位TiCp/Fe復(fù)合材料組織和性能的影響，并確定了該材料的最佳化學成分。結(jié)果表明：Ti是影響復(fù)合材料組織中TiC顆粒形核率的關(guān)鍵因素, 而C主要影響組織中TiC顆粒的尺寸；在合金熔體中，加入一定量的Si有利于TiC顆粒的形成，而Mn主要用來細化珠光體基體。
關(guān)鍵字: TiCp/Fe復(fù)合材料 原位反應(yīng) 化學成分
（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
