High-grade diesel engine body casting and manufacturing method thereof

The invention discloses a high-grade diesel engine body casting and a manufacturing method thereof. The high-grade diesel engine body casting comprises the following components in percentage by weight: 10-30% of high-purity pig iron, 30-60% of recycled vermicular iron and 30-60% of low-sulphur waste steel; according to the sulphur content of base iron, 0.25-0.35% of an Elkine CompactMag vermiculizer is added; 0.25-0.35% of an Elkine Barinoc inoculant is added; and vermicularizing treatment and attached test block and body inspection are carried out to obtain a qualified casting meeting high-strength performance indexes. The invention discloses a formula adopting a special process and a manufacturing method, so that the strength and compactness of the casting are improved; and scrap caused by leakage of the casting is reduced. 本发明公开了一种高牌号柴油机机体铸件及其制造方法，配方按如下重量百分比为：高纯生铁10～30％，蠕铁回炉铁30～60％，低硫废钢30～60％，根据原铁水的含硫量，添加埃肯CompactMag蠕化剂，其工艺范围为0.25-0.35％，添加埃肯Barinoc孕育剂，其工艺范围为0.25-0.35％。经蠕化处理，附铸试块及本体检验，获得符合高强度性能指标的合格铸件。本发明揭示