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Vol.14, No.1, 87 ~ 96, 1976

Title

Study on the Production of Pearlitic Matrix Spheroidal Graphite Cast Iron

김수영 Soo Young Kim

Abstract

Spheroidal Graphite Cast Iron which was discovered a quarter century ago becomes more important as industrial materials owing to many studies and research. But there are still many problems. Authors investigated the some variables in manufaturing of pearlitic matrix-spheroidal graphite cast iron which is the strongest spheroidal graphite cast iron. The important results obtained are as follows; 1. It is important to choose good elements in manufacturing the pearlitic matrix-spheroidal graphite cast iron. Especially it is a good way to make this cast iron by addition of proper amount of the third elements like Cu, Mn in addition to C, Si. 2. To make a good pearlitic matrix spheroidal graphite cast iron (especially small size cast iron) which has no cavity, metal mold is better to be used. But in this case it is very important to choose proper temperature for the first step annealing to decompose cementite. 3. The thickness of the metal mold (cooling velocity) affects formation of cementite greatly and this cementite has influence on the effect of heat treatment.

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