【摘要】 以高铬钢为基材,WC颗粒为增强颗粒,通过在预制层中分别加入钢粉和高碳铬铁粉来调节预制层的成分,利用真空实型铸渗法(V-EPC)制备WC颗粒增强钢基表层复合材料,分析预制层中合金种类对制备表层复合材料界面的影响。研究结果表明:预制层中合金粉末的粒度对复合层中WC颗粒和基体的界面结合产生影响,在金属液的作用下,400目的钢粉比160~200目的高碳铬铁粉更易熔化,有利于WC颗粒与基体界面的形成。预制层中合金粉末为钢粉的试样,过渡层不明显,存在显微裂纹;高碳铬铁粉的试样,复合层和基材之间过渡平缓,没有孔洞和微裂纹。更多还原

【Abstract】 For a high-chromium steel as substrate, WC particles as enhanced particles, joined by steel powder and high-carbon chrome iron powder separately to adjust the composition of Perform layers, using the way of the V-EPC infiltration, which are used to make WC-particle reinforced steel-based metal matrix composites and to research what effect the presetting components on the interface of the composite material. The results show that: the alloy powder particle size of the perform layer will have an impact on the WC particles and matrix interface. The steel powder of 400 meshes ability of molten is better than the high-carbon chrome iron powder of 160~200 meshes’, so it’s advantaged for forming matrix interface. Layer of perform steel alloy powder for steel powder, between the composite layer and the matrix was no obvious transition, have micro-cracks; for the high carbon chrome iron powder, composite layer and the substrate transition between the gentle, no micro-cracks and holes.更多还原