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本文探讨了用金属型铸造、在铸态下获得高铬铸铁屈氏体磨球的可能性,阐述了屈氏体磨球化学成份的选择原则、金相组织和机械性能的特点。试验证明:金属型铸造高铬铸铁屈氏体磨球综合机械性能好,耐磨性高,球耗量在50～90克/吨水泥范围内,比40Cr球的耐磨性高三倍多,是普通锻钢球的十倍以上。使用中无碎球(或碎球很少)、无剥皮。与淬火球相比,由于省去了高温热处理工艺,节省了能源,降低了消耗,具有明显的竞争力。
This article explores the possibility of obtaining high chromium cast iron troostite balls by casting with a metal mold and expounds the selection principle, microstructure and mechanical properties of the chemical constituents of a troostite grinding ball. Tests show that: Metal cast high-chrome cast iron troostite grinding ball comprehensive mechanical properties, high wear resistance, ball consumption in the range of 50 to 90 g / ton of cement, wear resistance than 40Cr ball more than three times, is Common forged steel ball more than ten times. No broken ball in use (or broken ball is small), no peeling. Compared with the quenched ball, due to eliminating the need for high-temperature heat treatment process, saving energy, reducing consumption, with obvious competitiveness.