콘텐츠 본문
논문 해외 국제전문학술지(SCI급) Effect of Rb2O and Cs2O on Inclusion Removal in 321 Stainless Steels Using Novel Basic Tundish Fluxes
- 학술지 구분 국제전문학술지(SCI급)
- 게재년월 2016-02
- 저자명 Kyunsuk Choi, Youngjo Kang & Il Sohn*
- 학술지명 Metallurgical and Materials Transactions B
- 발행국가 해외
- 논문언어 외국어
논문 초록 (Abstract)
Inclusion removal and modification of the 321 stainless steel using Rb2O- and Cs2O-containing novel basic tundish flux has been investigated. The average inclusion diameter was significantly lowered after reaction of the liquid metal with the flux after 45 minutes in an induction furnace set at 1823 K (1550 °C) under an Ar atmosphere. The number of inclusions was also decreased with increased reaction time and the majority of the inherent TiN inclusions were removed after reaction with the proposed novel basic tundish flux. Spinel inclusions were also observed after the reaction, which was due to the reaction of the MgO crucible and the CaO-Al2O3-SiO2-MgO-‘x’wt pct R2O flux system at fixed CaO/(Al2O3 + SiO2) of 1.45. The Rb2O and Cs2O seemed to have allowed significant removal of the TiN inclusions due to its ion compensation effect and the supplement of free oxygen ions, while increasing the viscosity of the slag to retain the absorbed inclusions.
