【摘要】 采用不同类型的WC硬质合金颗粒及不同成分的金属基本组成的两种复合耐磨材料，研究了复合材料的韧性及其影响因素，观察分析了其断口形貌及断裂机理．结果表明，复合材料的韧性与断面上WC硬质合金颗粒及金属基体的面积分数有关，主要取决于金属基体的成分、组织状态、韧性和含量，基体的韧性越好，含量越多，则复合材料的韧性越高．在冲击载荷作用下，WC硬质合金的断裂为脆性解理断裂，而金属基体则为具有少量塑性变形的准解理断裂。更多还原

【Abstract】 Two kinds of complex wear resistant materisls wbich consitst of distinct WC cememted carbide granules and differentcomponent metal matrises were used. The toughness of the complex materisls and its effect factors were investinated. Thefracture appearance and the fracture mechanism were observed and analysed,The research results show that the toughness oftbe complex materials is related with the area fraction of the cemented carbide granules and metal matrixes on the fracture,and it depende mainly on the composition, microstructure, amount and toughness of the metal matrixes. The better the toughness and the greater the amount of the matrix,the higher the toughness of the complex material. Under the acticn of impactload,the fracture of WC cemented carbides was brittle cleavage fracture,whereas that of the metal matrixes was quasicleavage fracture with a little plastic deformation.更多还原