발간논문

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Vol.36, No.1, 78 ~ 84, 1998
Title
Effect of Ti on the Oxidation Behavior of Ferritic Stainless Steel
박수호 , 이윤용 , 이용득 , 김학 Soo Ho Park , Yun Yong Lee , Yong Deuk Lee , Hak Kim
Abstract
19%Cr-Ti ferritic stainless steel has been used for stud pin as a glass sealing material for cathode ray tube. The characteristics of scale formation with various Ti content under the oxidation treatment in wet gas mixtures of 75%H₂+25%N₂ has been studied. The oxide scale is mainly composed of chromia with 2-4㎛ thickness. Mn-oxide is concentrated on the gas/scale interface. Ti-oxide is randomly distributed not only in oxide layer, but also scale/alloy interface. The oxidation rate was linearly increased with the addition of Ti up to 0.6%. This is related with the increase of the number of vacancy in chromic. The acid resistance in 5%HF+5%HNO₃ solution was decreased as the Ti content lowered below 0.4% because of irregular and thin oxide layer formation. Therefore, it is required to have at least 0.4% Ti to achieve adequate anti-acid properties.
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