Effect of Tundish Flux on Compositional Changes in Non-metallic Inclusions in Stainless Steel Melts
- Title
- Effect of Tundish Flux on Compositional Changes in Non-metallic Inclusions in Stainless Steel Melts
- Author
- 박주현
- Keywords
- tundish flux; non-metallic Inclusion; 304 stainless steel; degree of supersaturation; population density function (PDF); spinel; refractory-slag-metal-inclusion (ReSMI) multiphase reaction model
- Issue Date
- 2021-12
- Publisher
- IRON STEEL INST JAPAN KEIDANREN KAIKAN
- Citation
- ISIJ INTERNATIONAL, v. 61, NO 12, Page. 2998-3007
- Abstract
- The effect of the tundish flux on the evolution of non-metallic inclusions in Si-killed 304 (18%Cr-8%Ni)
stainless steel has been investigated at 1 773 K. The interfacial reaction between molten steel and the
CaO–Al2O3–MgO flux causes the aluminum pick-up from the liquid slag into the steel melt, resulting in a
decrease in the oxygen content in the steel. The aluminum originating from the slag modifies the preexisting Mn-silicate inclusions into alumina-rich inclusions in the steel. Because the oxygen content in the
steel decreases as it reacts with the CaO–Al2O3–MgO flux, the degree of supersaturation for alumina
formation is too low to precipitate new-born alumina particles in the steel. By analyzing the population
density function (PDF) results for inclusions, it can be observed that the growth of spinel-type inclusions
occurs by the diffusion of aluminum and magnesium in the steel. On the other hand, the composition of
the steel, as well as the evolution of inclusions, is negligibly changed when the CaO–SiO2–MgO flux is
added to the molten steel. Furthermore, the computational simulation for predicting the evolution of inclusions in molten steel during a continuous casting tundish process was carried out based on a refractoryslag-metal-inclusion (ReSMI) multiphase reaction model.
- URI
- https://www.jstage.jst.go.jp/article/isijinternational/61/12/61_ISIJINT-2021-167/_articlehttps://repository.hanyang.ac.kr/handle/20.500.11754/169462
- ISSN
- 09151559; 13475460
- DOI
- 10.2355/isijinternational.ISIJINT-2021-167
- Appears in Collections:
- COLLEGE OF ENGINEERING SCIENCES[E](공학대학) > MATERIALS SCIENCE AND CHEMICAL ENGINEERING(재료화학공학과) > Articles
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