발간논문

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Vol.33, No.3, 340 ~ 350, 1995
Title
Influence of Ti in Stainless Steel Melt on the corrosion of Refractory Materials
김동식Dong Sik Kim, 정우양Woo Yang Chung, 윤병하Byung Ha Youn
Abstract
Various grades of refractories were tested for their corrosion characteristics when used as a lining material of ladle for Ti containing stainless steel melt. Three different commercial refractories were machined into crucibles to melt stainless steels containing various amounts of Ti. After melting in crucibles at 1550℃ under Ar atmosphere for 1 hour, analyses were conducted to measure the depth of attack by liquid steel. The magnesia material(90% MgO) showed the best corrosion resistance. The alumina refractory containing high silica(> 30%SiO₂) was found to corrode significantly by the reaction of sillimanite(Al₂O₃·SiO₂) with Ti in liquid steel melt to form complex oxides with low melting temperature. The high alumina refractory (84%Al₂O₃) showed a relatively good corrosion resistance. The plant trial tests using these refractory materials for ladle lining were also conducted to examine the inclusions in continuously cast slabs. The inclusions originated from refractory were significantly reduced when high alumina (84% Al₂O₃)refractory lining were used.
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