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采用负压消失模(V-EPC)铸渗方法制备了SiCp/铸铁表面复合材料,并在自制的射流式冲蚀磨损试验机上研究了SiC粒子尺寸对其冲蚀磨损性能的影响。结果表明,通过粘接剂和添加剂的加入,阻止了SiC粒子遇到高温铁液的分解,并实现了SiC粒子与铸铁间的冶金结合。随着SiC粒子尺寸的增加,SiC粒子与铸铁基体的结合强度增大,使其抵抗浆料中石英砂粒子的冲击能力增大,从而提高了SiCp/铸铁表面复合材料的冲蚀磨损性能。
SiCp / cast iron surface composites were prepared by vacuum infiltration loss casting (V-EPC) infiltration process. The effect of SiC particle size on the erosion wear properties was investigated on a homemade jet erosion tester. The results show that SiC particles are prevented from decomposing at high temperature by the addition of adhesives and additives, and the metallurgical bond between SiC particles and cast iron is achieved. With the increase of SiC particle size, the bonding strength between SiC particles and cast iron matrix increases, which increases the impact resistance of quartz sand particles in the slurry and improves the erosion wear resistance of SiCp / cast iron surface composites.