( 1. 合肥工業(yè)大學 材料科學與工程學院， 合肥 230009;
2. 安徽建筑工業(yè)學院 機電工程系， 合肥 230022)
摘 要: 用電冶熔鑄工藝制備不同WC含量的WC/鋼復合材料， 研究了WC顆粒在復合材料鋼基體中的溶解行為和影響因素。 結(jié)果表明： 隨著WC含量的增加， 碳化物從鋼基體晶界處分布逐漸轉(zhuǎn)向晶內(nèi)分布； 隨著WC顆粒尺寸的增大， 在WC顆粒與鋼基體界面處形成一層反應物， 它阻止了WC顆粒在鋼基體中的進一步溶解, 同時也提高了兩相界面的結(jié)合強度。 通過調(diào)整電冶熔鑄工藝參數(shù)和WC顆粒的尺寸及含量， 可以控制WC顆粒在復合材料中的溶解行為。
關鍵字: WC/鋼復合材料； 電冶熔鑄； WC顆粒; 鋼基體
REN Hao1, HUANG Man-ping2
（ 1. Institute of Materials Science and Engineering,
Hefei University of Technology, Hefei 230009, China;
2. Faculty of Electromechanical Engineering,
College of Anhui Architectural Engineering, Hefei 230022, China）
Abstract: The WC/steel composites with various contents of WC were prepared by means of electroslag melting and casting method. The dissolution behavior of WC particle and its effect factors in the composites were researched. A variety of experiment techniques were used to investigate the interactions between tungsten carbide particle and the steel matrix. The results show that the distribution of WC particles varies from intergranular position of the steel matrix to interagranular location with increasing contents of WC particle. Furthermore, the interfacial reaction layer is formed on the vicinity of WC particle owing to the increase of size of WC particle, which prevents the interdiffusion of elements between matrix and WC particle and enhances drastically the interface bonding intensity. The dissolution behavior of WC particle in the composites can be controlled by regulating the processing parameters of elecctroslag melting and casting method and adjusting the powder starting size and contents of WC particle.
Key words: WC/steel composites; electroslag melting and casting method; WC particle; steel matrix
