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在炉料中常遇到有诸如Pb或Zn等有色金属,它们之中的一部份将不可避免地要保留在液态铸铁中,从而使铸铁的铸造性能、机械性能以及铸件的金相组织发生变化。在罗斯托夫农业机械厂可锻铸铁车间里,人们研究了含Pb或Zn0．05~0．15%对铸铁组织及性能的影响。铸铁系冲天炉－电弧炉双联熔炼,炉料为:炼钢生铁14~15%废钢40~45%,回炉铁38~41%和45Fesi3．5~4%。炼制的铸铁化学成份为(按重量百分比%):C2．21~2．26,Si1．39~1．47,Mn 0．5~0．54, S0．193~0．207, P0．08~0．09,Cr＜0．05。冲天炉出铁温度为1440~1460℃,电弧炉出炉温度为1540~156Q℃,铸铁于 1430~1450℃范围内浇注。
In the charge often encountered such as Pb or Zn and other non-ferrous metals, some of them will inevitably be retained in the liquid cast iron, cast iron casting performance, mechanical properties and casting metallurgical structure changes. In Rostov Agricultural Machinery Factory malleable cast iron workshop, people have studied the Pb or Zn0.05 ~ 0.15% on the cast iron microstructure and properties. Cast iron cupola - electric arc furnace double melting, charging: steel scrap 14 ~ 15% scrap 40 ~ 45%, 38 ~ 41% iron and 45Fesi 3.5 ~ 4%. Refined cast iron chemical composition (by weight percent): C2.21 ~ 2.26, Si1.39 ~ 1.47, Mn0.5 ~ 0.54, S0.193 ~ 0.207, P0.08 ~ 0.09, Cr <0.05. Cupola tapping temperature of 1440 ~ 1460 ℃, electric furnace temperature of 1540 ~ 156Q ℃, cast iron in the range of 1430 ~ 1450 ℃ pouring.