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对柴油机中间体铸件产生表面裂纹的原因进行了分析。提出了严格控制废钢中的Ｐ、Ｓ含量；加入０．１５％～０．３０％的合金元素Ｍｏ，提高钢的高温强度；强化冶炼时钢水去气沸腾操作；加强脱氧，延长钢水在包中的镇静时间等消除表面裂纹的有效措施
The causes of surface cracks on the diesel engine intermediate castings were analyzed. Proposed strict control of scrap P, S content; adding 0.15% to 0.30% of the alloying elements Mo, to improve the high temperature strength of steel; strengthen the degassing operation of molten steel smelting; strengthen deoxidation, to extend the molten steel in the package The calm time to eliminate surface cracks and other effective measures