区域式无压熔渗制备复合材料的研究  

Study on the Composites Prepared by Zone Melting and Pressureless Infiltration

作　　者：武宏[1] 牛立斌[1] 许云华[1] 

机构地区：[1]西安建筑科技大学耐磨材料研究所,陕西西安710055

出　　处：《铸造技术》2008年第10期1402-1405,共4页Foundry Technology

摘　　要：提出一种区域式无压熔渗制备碳化钨颗粒增强钢基复合材料的工艺。利用感应加热,将基体金属快速区域熔化,熔体依靠自重渗透到碳化钨颗粒之间。通过从砂型模底部的强行冷却和改变砂型模的移动速度,得到不同的试样,并对其进行SEM、EDS、显微硬度以及销盘磨损分析。结果表明:复合层厚度大约为4mm。随移动速度的提高,颗粒之间基体的渗透量逐渐减少;且每个试样均有一个最高的显微硬度值;与高铬铸铁标样相比较,当砂型模移动速度为3cm/min时,复合材料的耐磨性较好。A zone melting and pressureless infiltration preparation technology of steel matrix composites reinforced with WC particle was proposed. The steel matrix was quickly melted by zone induction heating. Under the function of gravity, the molten metal was homogeneous infiltrated into the gap among WC particles. Through chilled at bottom and adjusting the moving speed of sand mould, the different composites were obtained and investigated by SEM, EDS, microhardness and pin-on disc abrasive wear. The results show that the thickness of composites is about 4 mm. With increasing the moving speed of sand mould, the amount of infiltrated steel gradually decreases, each sample has a highest microhardness. Compared with the sample of the high chromium cast iron, the wear-resistant performance of composite is optimal when the moving speed of sand mould is 3 cm/min.

关 键 词：熔渗 WC 复合材料 感应加热 耐磨性 

分 类 号：TB331[一般工业技术—材料科学与工程]