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采用烧结法制备铁基白刚玉磁性磨料,并对3Cr2Mo模具钢材料进行磁力研磨加工实验。铁基相和研磨相的粒径比会严重影响加工效果,根据摩擦理论推导出磁性磨料的最佳粒径比A为1.33~3.32。通过理论分析与实验相结合的方法评价磁性磨料的磨削性能,验证了当铁基白刚玉磁性磨料的研磨相粒径d一定时,磨削深度ap随铁基相与研磨相粒径比的增大而增大,加工效率提高但加工质量降低。当铁基白刚玉磁性磨料铁基相与研磨相的粒径比为3时,其磨削性能最佳。
Iron-based white corundum magnetic abrasive was prepared by sintering, and the magnetic grinding process of 3Cr2Mo die steel was carried out. The particle size ratio of iron-based and abrasive phases will seriously affect the processing effect. According to the friction theory, the optimum particle size ratio A of magnetic abrasive is 1.33-3.32. Through the combination of theoretical analysis and experiment, the grinding performance of magnetic abrasive was evaluated. It was verified that when the grinding phase particle size d of Fe-based white corundum magnetic abrasive is constant, the grinding depth ap is proportional to the ratio of the iron-based phase to the grinding phase Increase and increase, processing efficiency but lower processing quality. When iron-based white corundum magnetic abrasive iron-based phase and the grinding phase particle size ratio of 3, the grinding performance of the best.