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采用真空实型负压铸渗工艺,通过在预制复合层中添加适量钼铁粉进行界面合金化,成功制备出了WCP颗粒增强钢基表面复合材料。结合OM、SEM、XRD和显微硬度计等分析手段对复合层物相组成、显微结构与性能进行了测试。结果表明,添加16.67%(质量分数)的钼铁粉有效改善了复合层界面组织及力学性能的连续性,改善了复合材料的铸渗效果,增加了铸渗层厚度,合金碳化物含量增加,复合层基体硬度约是基材的2倍,提高了复合材料的耐磨性。
Vacuum real-type negative pressure casting and infiltration process was adopted to prepare the WCP particle reinforced steel-based surface composite by interfacial alloying with appropriate amount of molybdenum iron powder in the prefabricated composite layer. The phase composition, microstructure and properties of the composite were tested by OM, SEM, XRD and microhardness test. The results show that the addition of 16.67% (mass fraction) molybdenum iron powder can effectively improve the continuity of the microstructure and mechanical properties of the composite layer, improve the infiltration effect of the composite material, increase the thickness of the infiltration layer, increase the alloy carbide content, Composite substrate hardness of about 2 times the substrate, improve the wear resistance of the composite material.