WC在WC/灰铸铁复合材料基体中的溶解

为了对WC/Fe复合材料的界面设计和控制提供理论指导, 论文分析了WC在WC/灰铸铁复合材料基体中的溶解热力学, 通过差热分析、 光学显微镜、 扫描电镜和X衍射等测试方法研究了WC与灰铸铁基体之间的界面, 对WC颗粒在基体中的溶解过程进行了探讨。研究结果表明: WC颗粒与HT300基体润湿良好, 当系统最高温度为1450℃时, WC颗粒的表面有明显被溶解的痕迹, WC颗粒在HT300基体溶液中发生明显溶解的开始温度约为1281℃; 当系统温度升高到某一温度时, WC发生分解反应(2WCW₂C＋C), 元素扩散将促进WC颗粒的溶解。 

Dissolution of tungsten carbide particulates (WC) in the matrix of WC reinforced gray cast iron matrix composite

In order to provide theoretic direction for interface design and control of WC/Fe composite, the dissolution thermodynamics of WC particles in the matrix was analysed for WC particles reinforced gray cast iron matrix composites, and the experimental techniques such as DTA, OM, SEM and XRD were used to investigate the interactions between the tungsten carbide (WC) particulates and the gray cast iron matrix, and the dissolution of the tungsten carbide particulates (WC) in the matrix was investigated. The results show that HT300 melting has a good wetting with WC particles, the surface of WC particles is dissolved obviously when the highest temperature of the system is 1450℃, and WC particles begin to be dissolved in the HT300 matrix as the temperature is about 1281℃. When the system temperature rises to a certain point, the resolution reaction of WC (WCW2C＋C) occurs and the diffusion of elements can accelerate the dissolution of WC particles.