【摘要】 为了探寻更适合当前工业应用的耐磨材料成型方法,采用消失模铸造工艺制备了WCp/Fe复合材料,研究了浇注方式对复合材料硬度和耐磨性的影响。结果表明:添加不同粒径的WC颗粒后,顶注、缝隙式浇注、底注3种浇注方式制备的复合材料试样硬度和耐磨性都得到了明显提高;与顶注和底注2种浇注方式的充型过程相比,缝隙浇注的充型过程较为平稳,所得试样的硬度及耐磨性较高,硬度及耐磨性随着试样中添加WC颗粒粒径的减小而升高;试样中添加WC颗粒粒径为5.5μm(2 500目)时,硬度达到HRC 50,耐磨性提高了2.21倍。不同浇注方式下制备复合材料试样硬度和耐磨性能的变化结果,可为消失模铸造WCp/Fe复合材料的工业生产及应用提供技术参考。更多还原

【Abstract】 In order to find a more suitable wear-resistant material forming method for current industrial applications, WCp/Fe composites were prepared by the lost foam casting process, and the effects of the pouring method on the hardness and wear resistance of composites were studied. The results show that the hardness and wear resistance of the composite samples prepared by top pouring, gap pouring and bottom pouring are improved significantly after adding WC particles of different sizes. Compared with the filling process of top pouring and bottom pouring, the filling process of gap pouring is more stable, the hardness and wear resistance of the samples are higher, and the hardness and wear resistance of the samples increase with the decrease of WC particle size. When the WC particle size is 5.5 μm(2 500 mesh), the hardness reaches HRC 50, and the wear resistance increases by 2.21 times. The changes of hardness and wear resistance of the composite samples prepared by different pouring methods can provide a reference for the industrial production and application of WCp/Fe composites in lost foam casting.更多还原