발간논문

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Vol.23, No.11, 1219 ~ 1231, 1985
Title
Production of Large Sectioned compacted - Vermicular Graphite Cast Iron from Blast Furnace Iron
권해욱Hae Wook Kwon, 김성수Sung Soo Kim
Abstract
This investigation was undertaken to deters me the feasibility and consistency of obtaining desirable compacted vermicular graphite cast iron from co1d pig iron obtained from blast furnaces. The molten iron after treatment to convert it to C.V graphite was cast into large sections that would provide solidification conditions similar to those prevailing in large ingot molds. Three types of treatment of the molten iron were employed: Mg treatment plus the addition of denodularizing elements such as Ti & Al; deliberate undertreatment with Mg; and the addition of rare earth silicides. The best method of producing a C.V. graphite in large sectioned castings for ingot mold purposes is the treatment with a Mg bearing alloy such as 5% MgFeSi plus a denodularizing element such as Al. A mostly ferritic matrix can be obtained in C.V. graphite cast iron made from cold pig iron in heavy sections with silicon contents in the range of at least 1.9% and manganese contents under 0.6%.
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