| 简介 |
FIELD : metallurgy.SUBSTANCE : invention relates to metallurgy field and can be used for casting of products from cast iron with globular graphite. Method includes melting of intermediate product and discharge of melt into ladle. At melt temperature 1300÷1550°C it is introduced flux cored electrode, filler of which contains iron, silicon and not less than 18 wt % of magnesium, at a rate of wire feeding 0.1÷2.5 m/s and magnesium consumption 0.5÷3 kg per tone of melt. Before introduction of flux cored electrode into melt it is preliminarily introduced soda ash or mixture of soda ash and fluorspar in equal ratio in amount 1÷5 kg per tone of melt. Filler of flux cored wire can additionally contain 0.5÷10 wt % in total amount of rare-earth metals, barium, calcium, titanium, aluminium.EFFECT : rising of cast iron mechanical properties ensured by providing in structure of finished products of uniform distribution of globular graphite inclusions.5 cl, 4 tbl |
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