Study Of Steel Substrate Resistant Composite Materials In Lost Foam Casting Process

The processing of particle reinforced steel matrix composites was one of the alloyingmethods to improve the metal surface resistance. Evaporative pattern casting process hasbeen used with casting combination to botain local surface wear-resistant composite layer.The wear resistance of the casting surface material was improved by this means, and theoperation was simply and cost low.In this paper, the effecting of grain size of SiC and WC, and also the addition of EPSon the steel substrate composite material structures, compositions and properties havebeen studied.The influence of binder type on paint coating sag resistance, compositestrength, the gas evolution of coating has been analysed. It was find that the size of WC,SiC adding for madding surface composite of steel-based organization, compositionhandperformance have a greater impact experiments. SiC and WC coating formulations forhigh-manganese steel was optimized on crusher hammer for a small batch productionprototype.The particle size of20to40mesh SiC,40to80mesh WC prepared steel substratecomposites have better organization and performance to do with foam rubber bindercomposite coatings prepared by coating the surface of a hanging greater impact, inaddition, gas evolution is also large, easy to form the casting porosity and slag defects; andoptimized SiC and WC particles reinforced steel matrix surface composites lost foamcasting process.By microstructure observation, it was found that when the size of SiC was size of20~40, and the size of WC was40~80, some particles were found in the composite layersample, but when the size smaller, there were no particles unmelted.By X-ray diffraction analysis, some new enhancements phases was formated in SiCand WC particles reinforced steel matrix surface composites, such as Cr18.93Fe4.07C6, Fe7C3,Mn7.53Si1.80C1.33, Fe7C3,(Cr,Fe)7C3, W2C.The experimental results show that the specimen of S2-2SiC particle reinforcedmatrix abrasion resistance was2.11times. The W4-0WC has gain almost high abrasionresistance about2.82times.