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我厂采用3t/h酸性密筋炉胆冲天炉熔炼及大块浮硅孕育法生产以珠光体为基体的高强度球铁,经热处理后,球铁件的抗拉强度>900MPa、延伸率>2％。一、中间合金的配比及熔制我们采用地坑式焦炭炉熔化中间合金,其配比为Mg9％、Re18％、Cu18％、75Si-Fe33％、碎铁22％。中间合金成分为Mg7～9％、Re5～6％、Cu18％、 Si≤30％,中间合金的加入量为1.4％,并使用凹坑式处理包处理铁水。配料投炉成分为C3.57％、Si1.488％、Mn0.413％、 Mo0.315％、
I plant the use of 3t / h acid dense tendons furnace cupola furnace melting and large floating silicon inoculation method to produce pearlite matrix of high-strength ductile iron, after heat treatment, ductile iron pieces of tensile strength> 900MPa, elongation> 2%. First, the ratio of intermediate alloy and melting We use pit-type coke furnace melting intermediate alloy, the ratio of Mg9%, Re18%, Cu18%, 75Si-Fe33%, iron scrap 22%. The composition of the master alloy is Mg7 ~ 9%, Re5 ~ 6%, Cu18%, Si≤30%, the addition amount of the master alloy is 1.4%, and using the pit treatment package treatment hot metal. The ingredients of the ingredients were C3.57%, Si1.488%, Mn0.413%, Mo0.315%