作　　者： ; ; ;

机构地区： 中南大学材料科学与工程学院粉末冶金国家重点实验室

出　　处： 《粉末冶金技术》 2006年第2期102-105,109,共5页

摘　　要： 为研制在某些特殊工况条件下用的高强度、高耐磨性的铁基耐磨材料,采用烧结-熔渗-热处理工艺研制出一种由Co-Cr-Mo-Si颗粒增强的铁基粉末冶金耐磨材料。结果表明:Co-Cr-Mo-Si硬颗粒单独存在于基体中,起颗粒强化的作用。未熔渗时,孔洞多,硬颗粒与基体界面清晰可见,结合强度低,材料性能较差。随着熔渗量的增多,材料的孔隙度减小,硬颗粒与基体界面结合强度好,材料性能明显提高。同时,材料的断裂主要通过铜相的撕裂,呈现明显的塑性断裂特征。因此,足够的熔渗量可获得各相界面结合较好的一种高性能铁基材料。 Iron - based P/M materials reinforced by Co - Cr - Mo - Si particles were prepared by sinter - copper infiltration and heat treatment for some special requirements. Effect of copper infiltration on the materials properties was studied. The results show that the reinforcing particles are separate and distribute in ferrous matrix, and strengthen the materials. There are many pores in the materials without infiltration and the interface bond strength between reinforcing particles and ferrous matrix is very low, resultant materials properties are poor. With the increase of copper quantity in infiltration process, porosity reduces obviously, the interface bond strength increases and the materials properties become high. The fracture is mainly caused by the tearing of copper phase, showing features of ductile fracture. A kind of iron - based P/M materials with high interface bond strength and good materials properties is obtained.

关 键 词： 铁基粉末冶金材料 熔渗 颗粒增强 材料性能

领　　域： [一般工业技术] [一般工业技术]