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型内孕育处理是生产球墨铸铁的一种简单易行而效果较好的孕育工艺。它对改善石墨形态:细化和均匀石墨球,提高球化率和圆正度,有效地消除铸态渗碳体,弥散磷共晶,提高铸态球铁的综合性能起着一定的作用。我厂生产铁素体球墨铸铁汽车底盘零件,由于使用稀土硅铁镁合金球化剂成份波动较大,铸件基体组织非常不稳定,石墨形态多呈团状和团片状。特别是铸态渗碳体的产生难以避免,平均约在10～15％,有的高达30％,珠光体量也在
Inoculation is the production of ductile iron is a simple and good effect of inoculation process. It is to improve the graphite morphology: refine and uniform graphite ball, improve the ball rate and roundness, effectively eliminate as-cast cementite, disperse phosphorus eutectic, improve ductile iron ductility play a role. I plant production of ferrite ductile iron chassis parts, due to the use of rare earth ferrosilicon magnesium alloy nodulizer composition fluctuations, the casting matrix is very unstable, multi-cluster graphite morphology and group-like. In particular, the production of as-cast cement is unavoidable, with an average of about 10 to 15% and some as high as 30%. The amount of pearlite is also