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山东省滨州曲轴厂是生产球铁曲轴的专业厂,过去该厂生产的球铁曲轴铸件废品率平均在20％以上,其中,因皮下气孔造成的废品占60～90％,每年报废铸件200多吨。经剖析报废铸件发现,皮下气孔重要分布在远离浇口端的做件下箱部分(严重时
Binzhou crankshaft plant in Shandong Province is a professional factory producing ductile iron crankshaft. In the past, the output of ductile iron crankshaft castings produced by the plant averaged over 20%. Among them, 60% to 90% of waste products caused by subcutaneous pores and more than 200 scrapped castings each year Ton. After the analysis of scrapped castings found that the subcutaneous foramina is mainly distributed in the part of the lower part of the box away from the gate (in severe cases