通过研制稀土铬锰硅合金和硅钙锰合金,有效地解决了稀土、钙在灰铸铁中熔解能力差,造渣倾向严重的问题。采用研制的合金进行试验室试验和现生产工艺试验,详细地分析了稀土、钙对灰铸铁组织和性能的影响。提出用稀土铬锰硅合金代替昂贵的稀土钼铁合金生产高性能的柴油机缸体。 Through the development of rare earth chromium-manganese-silicon alloy and silicon-calcium-manganese alloy, the problems of rare earth and calcium melting in gray cast iron are poorly solved and slagging tendency is serious. Adopting the developed alloy for laboratory test and production process test, the effects of rare earth and calcium on the microstructure and properties of gray cast iron were analyzed in detail. Proposed to use rare earth chromium manganese silicon alloy instead of expensive rare earth molybdenum ferroalloy production of high-performance diesel engine block.