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某厂生产9SiCr钢是用电炉冶炼浇成20时方锭热送开坯的。钢坯表面裂纹多,修磨量大,平均精整面积开63.75％,有的炉次高达95％。 我们对9SiCr钢钢坯表面质量差的原因行进了分析研究,认为浇注工艺因素对钢坯表面质量影响很大,因此决定对已有的数据进行数理统计,统计了1980年1月—10月冶炼的161炉9SiCr钢。根据统计分析的结果,确定了较佳浇注工艺。按较佳浇注工艺控制
A factory production 9SiCr steel is cast by electric furnace smelting poured into the ingot hot 20 hours. Billet surface cracks and more grinding capacity, the average finishing area open 63.75%, and some as high as 95% of the furnace. We analyzed the reasons for the poor surface quality of 9SiCr steel billets and concluded that the pouring process factors have a great influence on the surface quality of the billets. Therefore, we decided to make mathematical statistics on the existing data, and we counted the smelting results of January-October 1980 Furnace 9SiCr steel. According to the results of statistical analysis, a better pouring process was determined. By better pouring process control