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本文研究了真空双电极自耗高合金钢过程中一些主要工艺因素对细晶锭组织特征的影响。结果表明,电极电流密度、二根水平对置自耗电极在熔化时电极端面上形成的金属液滴下落于锭模中的位置变化、锭模旋转速度、电极和锭模尺寸配比及合金成份不同,是影响铸锭组织的重要因素。目前,已经初步掌握了各个因素优化条件下炼制某些高合金钢细晶铸锭,等轴细晶粒平均直径为0.17毫米,相当于ASTM2～3级。细晶锭直径达到φ180～250毫米,锭重120～200公斤。细晶锭的热锻塑性及材料的综合性能都优于常用的真空自耗方法生产的材料性能。
In this paper, the effects of some main process factors on the microstructure of fine ingot during vacuum double electrode consumable high alloy steel were studied. The results show that the electrode current density, the position of droplet of metal drop formed on the end surface of the electrode in the melting of the electrode with two horizontal electrodes, the rotation speed of the mold, the size ratio of the electrode to the mold and the alloy Different ingredients, is an important factor affecting the ingot organization. At present, some high-alloy fine grain ingots have been preliminarily mastered with various factors optimized. The average diameter of fine equiaxed grains is 0.17 mm, equivalent to ASTM2 ~ 3 grades. Fine ingot diameter φ180 ~ 250 mm, spindle weight 120 ~ 200 kg. Hot forging of fine ingots and the overall performance of materials are superior to the commonly used methods of vacuum self-consumption of materials produced by the performance.