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用高硅碳比孕育铸铁代替常规孕育铸铁,生产HT300的CA系列车床床身铸件,在成本相差不大的情况下,可以稳定提高HT300的强度,缩小硬度差,减小机床铸件的应力;还可以避免因原料成分波动大而引起的理化性能波动,进而避免普通硅铁孕育剂因含铝量过高而引起针孔及皮下气孔缺陷的产生,提高了床身件产品的质量,减少了机床铸件废品损失。
Replacement of conventional cast iron with high silicon-carbon ratio instead of conventional cast iron, the production of HT300 CA series lathe bed castings, in the case of little difference in cost, can be a steady increase in the strength of HT300, reduce the hardness difference and reduce the stress of machine tool castings; Which can avoid the fluctuation of physicochemical properties caused by the fluctuation of the raw material composition, thereby avoiding the occurrence of pinhole and subcutaneous stomatal defects caused by the high content of aluminum in ordinary ferrosilicon inoculants, improving the quality of the bed body product and reducing the machine tool Casting waste loss.