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Retrofits in process of producing compacted graphite cast irons ducteis or and in the process of producing parts fused to the irons.
Retrofits in process of producing compacted graphite cast irons ducteis or and in the process of producing parts fused to the irons.
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机译:在生产压实石墨铸铁风管或生产与铸铁融合的零件的过程中进行改造。
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摘要
The present invention is directed to processes and apparatus for carrying out said processes wherein molten cast iron is treated with a predominantly iron alloy having the essential elements by weight of from about 0.1 to about 10.0% silicon and about 0.5 to about 4.0% magnesium. The alloy may comprise from about 0.1 to about 10.0% silicon, about 0.5 to about 4.0% magnesium, up to about 2.0% of one or more rare earth elements such as cerium about 0.5 to about 6.5% carbon, the balance being iron. Small amounts of calcium, barium or strontium and trace elements customarily found in conventional raw material may be present in the alloy. The characteristics of the alloy make it possible to establish a ready supply of treated molten iron in the foundry in holding vessels with a selected chemical composition at a given temperature. It also makes possible semi-continuous and continuous casting of ductile and compacted graphite cast irons.
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