WC-TiC-Co/Cr20复合材料的制备与界面特性

Fabrication and Interface Property of WC-TiC-Co/Cr20 Composites

采用负压铸渗工艺研制具有颗粒增强耐磨复合层的高铬铸铁基复合材料,分别通过XRD、EDX等分析手段研究了复合材料界面的成分特点和物相组成。WC-TiC-Co增强颗粒均匀分布于复合层中,且基体与增强颗粒界面为冶金结合。由于增强颗粒的部分溶解以及W、C、Ti、Co、Fe、Cr等元素的互扩散,在复合材料界面区域形成了含有Fe、W、Co等元素的多种化合物。考察了所研制复合材料的耐磨性。

The vacuum infiltration casting technique was adopted to prepare high-Cr white cast iron based composites with particle-reinforced wear resistant layer. The composition and phases of the interface were analyzed by means of XRD, EDX, etc. The WC-TiC-Co particles distribute uniformly in the composite layer of the material. The casting technique ensures metallurgical bonding of the interface between the high-Cr white cast iron and the particles. Owing to partial dissolution of the WC-TiC-Co particles and the interdiffusion of elements such as W, C, Ti, Co, Fe and Cr, compounds containing Fe, W and Co were formed in the interface region of composites. Finally, wear resistance of the composites was studied.