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前言我厂以本溪生铁为主,辅以甘肃三九生铁,进行稀土镁球墨铸铁QT40—10的大量生产,年平均产量达350吨左右。生铁含硫量要求小于0.05％,球墨铸铁原铁水含硅量一般控制在1.0～1.3％之间。球化剂为稀土硅铁镁合金Re-Mg7-8或Re-Mg9-10,加入量为1.4～2.0％。孕育剂为75％硅铁,包内一次孕育量为0.8～1.2％。按照工艺要求,用冲天炉熔炼,铁水出炉温度应控制在1380°～1420℃内,球墨铸铁浇注温度可控制在1320°～1360℃之间,效果较好,球墨铸铁质量也一直稳定。
Preface Our factory is mainly based on Benxi pig iron, supplemented by Gansu 39 pig iron, rare earth magnesium nodular cast iron QT40-10 mass production, the average annual output of 350 tons. Sulfur content of pig iron less than 0.05%, the original silicon content of ductile iron is generally controlled between 1.0 to 1.3%. Nodulizer is rare earth ferrosilicon magnesium alloy Re-Mg7-8 or Re-Mg9-10, added in an amount of 1.4 ~ 2.0%. Inoculants for the 75% ferrosilicon, a package within the birth of 0.8 to 1.2%. In accordance with the process requirements, with a cupola smelting, hot metal temperature control should be controlled at 1380 ° ~ 1420 ℃, ductile iron pouring temperature can be controlled between 1320 ° ~ 1360 ℃, the effect is better ductile iron quality has also been stable.