多年来,我们遵循用二次冲入法生产球墨铸铁件的规律,生产过程中常常产生球化不良现象。分析认为,主要是由于没有专用球铁浇包和第一次放出铁液数量控制不够准确造成的,同时二次冲入法也有它自身的缺点。为此,我们采用了一次冲入法生产球墨铸铁工艺,取得了满意效果。 球化处理前,把预热过的球化剂合金放在浇包底堤坝的一侧,合金上面覆盖预热后的75Si-Fe并用砂冲子捣紧,使75Si-Fe粒填入合金间隙,最后用 Over the years, we follow the law of secondary production of ductile iron castings, the production process often produces bad ball phenomenon. Analysis, mainly because there is no dedicated iron ladle and the first release of the amount of molten iron is not accurate enough control caused by the same time into the law has its own shortcomings. To this end, we have adopted a punching process ductile iron production technology, and achieved satisfactory results. Prior to spheroidizing treatment, the preheated nodulizer alloy was placed on one side of the dyke embankment. The alloy was covered with preheated 75Si-Fe and tamped with a sand punch to fill the alloy gap with 75Si-Fe Finally, use