pISSN : 1598-706X / eISSN : 2288-8381
한국주조공학회지 (10권6호 520-527)
A Study on the Reduction of Segregation in Large 12%Cr Steel Ingot
12%Cr 대형강괴(大型鋼塊)의 편석경감(偏析輕減)에 관(關)한 연구(硏究)
Ok-Ki Eun, Yun-Souk Chang
Korea Heavy Industries and Construction Co.
In order to reduce segregation in 12%Cr steel ingots of 60-100tons, numerical analysis by computer was applied to simulate solidification profiles and the profiles of liguid-solid coexisting zone in accordance with the ratios of H(Height) /D(diameter) of 100-ton ingot. The result is that the ratio of L(vertical length) /D(diameter) of liquid-solid coexisting zone was reduced in proportion to the decrease of H/D ratio. With the reduced H/D ratio(0.92) of ingot, the segregation in 60-ton ingot of 12% Cr steel can be much reduced and recovery was also improved by reducing ingot weight.
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