발간논문

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Vol.37, No.5, 627 ~ 634, 1999
Title
Research Paper / Materials Processing : Effect of Oxygen Blowing under Redueed Pressure on Decarburization Reaction of Ultra - Low Carbon Steel
김준식Joon Sik Kim, 정권희Kwon Hee Jeoung, 안상복Sang Bog Ahn, 반봉찬Bong Chan Ban
Abstract
The effect of oxygen blowing under reduced pressure on decarburization and temperature changes were studied using an RH vacuum degasser. The decarburization rate was increased from 0.17 to 0.19min^(-1) by oxygen blowing during decarburization. It was caused by the increase of effective reaction area such as cavity and splash formed by oxygen blowing on melt surface. The carbon content below 20ppm was obtained by oxygen blowing. An average TDR (temperature drop-rate) during decarburization was decreased to -0.6℃/min by oxygen blowing. It was caused by post combustion of the carbon monoxide gas generated from melt decarburization in RH vacuum vessel.
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