Alloy and process for producing and casting ductile and...

C - Chemistry – Metallurgy – 22 – C

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75/135, 53/97

C22C 33/10 (2006.01)

Patent

CA 1213159

ALLOY AND PROCESS FOR PRODUCING AND CASTING DUCTILE AND COMPACTED GRAPHITE CAST IRONS Abstract of the Disclosure This invention relates to a new and unique alloy composition and to the method of treating molten cast iron with such alloy to produce ductile and compacted graphite cast irons. The alloy is a predominately iron alloy having the essential elements by weight of from about 0.1 to about 10.0% silicon, from about 0.5 to about 4.0% magnesium, from about 0.1 to about 10.0% nickel and optionally from about 0.1 to about 2.0% cerium, and/or other rare earth elements. The alloy may comprise from about 0.1 to about 10.0% silicon, from about 0.5 to about 4.0% magnesium, from about 0.1 to about 10.0% nickel, optionally from about 0.1 to about 2.0% cerium and/or other rare earth elements, from about 0.5 to about 6.5% carbon and the balance iron. Small amounts of calcium, barium or stronium and trace elements customarily found in conventional raw materials used in producing the alloy may also be present. 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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