铸渗-原位反应制备WCP / W纤维混杂增强铁基复合材料
Preparation of Iron Matrix Composite Hybrid Reinforced with WC Particles and Tungsten Fibers by Cast-penetration and In-situ Method
付永红1, 牛立斌2, 许云华1, 王发展1
点击：3554次 下载：0次
作者单位：1. 西安建筑科技大学 耐磨材料研究所, 陕西 西安 710055; 2. 西安科技大学 材料科学与工程学院, 陕西 西安 710055
中文关键字：原位反应； 铸渗； 碳化钨； 复合材料； 耐磨性
英文关键字：in-situ synthesis; cast-penetration; tungsten carbide; composites; wear resistance
中文摘要：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。
英文摘要：Using tungsten fibers and gray cast iron as reactive source, in-situ WC particles and tungsten fibers reinforced iron matrix composite were fabricated by cast penetration and in-situ synthesis methods. The phase, microstructure and wear behavior of the composite were analyzed by DTA, XRD, SEM and two-body abrasive wear test. The results show that, when the cast-penetration and in-situ synthesis temperature are 1300 ℃ and 1160 ℃, respectively. The compacted composite can be ensured. The reaction between tungsten fibers and carbon from gray cast iron can be carried on. Some tungsten fibers react completely and a lot of WC particles form, which have particle reinforcement effect on the matrix, whereas some react incompletely and have fiber reinforcement effect. The relative wear resistance of the composites increases gradually by increasing loads, the main wear mechanism is cutting abrasive wear.