预制层中合金粉末粒度对WC/钢基表层复合材料的表面质量和组织的影响

Effects of Alloy Powder Granularity in Perform Layer on the Quality and Microstructure of WC/Steel Surface Composites

以高铬钢为基材、WC颗粒为增强颗粒,通过在预制层中加入不同粒度的高碳铬铁粉末对铸渗效果尤其是铸渗层的界面进行控制,重点研究预制层中的合金粉末粒度对表层复合材料表面质量和组织的影响。结果表明,随着高碳铬铁粉末粒度的减小,铸渗层的厚度呈递增趋势,表面质量也日趋完好,当粉末粒度为200~320目时,所制备出的表层复合材料铸渗层完整,无裂纹,铸渗层的厚度为3mm。表层复合材料的组织研究结果表明,随着高碳铬铁粉末粒度的减小,过渡层变化逐渐变平缓,而WC颗粒在基体中的溶解程度呈加剧趋势。

Using the high-chromium steel as substrate prepares WC particles reinforced steel matrix surface 1ayer composites were by V-EPC infiltration. In this study, we control the impact of infiltration, especially the interface in infiltration layer by using different granularity of high carbon-Cr iron powder, and discuss that the effects of alloy powder granularity in perform later on the quality of surface and microstructure. The result shows that with reducing the grain size of alloy powder, the infiltration la...