【摘要】 采用电渣重熔工艺，利用OM,SEM,TEM等手段研究了高合金马氏体钢中一次碳化物的特征演变及其对冲击韧性、耐磨性的影响.结果表明，电渣重熔有效细化了一次碳化物并改善了其分布，促进了高合金马氏体钢冲击韧性及耐磨性的提升.与真空冶炼铸锭相比，电渣重熔处理后铸锭冲击断口中由一次碳化物引起的裂纹长度及宽度明显减小，冲击功由5.5 J提升至7.8 J.电渣重熔铸锭热处理后一次碳化物分布的均匀化以及二次碳化物的析出阻挡了磨粒对马氏体基体的切削，提升了马氏体钢的耐磨性.更多还原

【Abstract】 The electroslag remelting process has been adopted to study the characteristic evolution of primary carbides in high alloy martensitic steel and its impact on impact toughness and wear resistance using OM, SEM, TEM, and other methods. The results show that electroslag remelting effectively refines the primary carbide and improves its distribution, which promotes the impact toughness and wear resistance of high alloy martensitic steel. Compared with vacuum smelting ingot, the length and width of the crack caused by primary carbide in electroslag remelting ingot are significantly reduced, and the impact toughness increases from 5.5 J to 7.8 J. After heat treatment, the uniform distribution of primary carbide and precipitation of secondary carbide in electroslag remelting ingot prevent the grinding of martensitic matrix by abrasive particles, which improves the wear resistance of martensitic steel.更多还原