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以金属钨纤维编织的钨网和灰口铸铁为原材料,选用铸渗-原位反应法制备WCP/W纤维混杂增强铁基复合材料。通过DTA、XRD、SEM以及两体磨损试验对该复合材料的物相、显微组织以及磨损特性进行了分析。结果表明:当铸渗复合和原位反应温度分别为1300℃和1160℃时,可确保复合材料组织的致密性,以及金属钨纤维和灰口铸铁基体中的碳反应合成WC颗粒。反应完全的钨纤维原位生成较多的WC颗粒,起到颗粒强化效果;反应不完全的钨纤维在基体中起到纤维强化效果;复合材料的耐磨性随着载荷的增加不断提高,其磨损机制主要为显微切削磨损。
The WCP / W fiber hybrid reinforced iron matrix composites were prepared by infiltration infiltration - in-situ reaction method using tungsten mesh and gray cast iron weaved by tungsten metal as raw materials. The phase, microstructure and wear characteristics of the composites were analyzed by DTA, XRD, SEM and two-body wear test. The results show that the compactness of the composite structure and the carbon particles in the matrix of the gray cast iron matrix can be ensured when the infiltration recombination and in-situ reaction temperature are 1300 ℃ and 1160 ℃, respectively. Tungsten fiber reacted completely to produce more WC particles in situ, which could enhance the effect of particles. Tungsten fiber with incomplete reaction played the role of fiber reinforcement in the matrix. The wear resistance of the composites increased with the increase of load. The main wear mechanism for micro-cutting wear.