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- Title
Impacts of Modification of Alloying Method on Inclusion Evolution in RH Refining of Silicon Steel.
- Authors
Fangjie Li; Huigai Li; Shaobo Zheng; Jinglin You; Ke Han; Qijie Zhai
- Abstract
This study explores the effect of introducing additional alloy elements not only in a different order but also at different stages of the Ruhrstahl-Heraeus (RH) process of low-carbon silicon steel production. A more economical method, described as "pre-alloying", has been introduced. The evolution of MnO-FeO inclusions produced by pre-alloying was investigated. Results show that spherical 3FeO⋅MnO inclusions form first, then shelled FeO⋅zMnO (z = 0.7-4) inclusions nucleate on the surface of pre-existing 3FeO⋅MnO. Spherical FeO⋅zMnO (z = 3-5) is further evolved from shelled 3FeO-MnO by diffusion. Because these MnO-FeO inclusions float up into the slag before degassing, the pre-alloying process does not affect the quality of the melt in the end. Both carbon content and inclusion size conform to industry standards.
- Subjects
SILICON steel; DEGASSING of metals; MANGANESE oxides; FERRIC oxide; MILD steel; METAL inclusions
- Publication
Materials (1996-1944), 2017, Vol 10, Issue 10, p1206
- ISSN
1996-1944
- Publication type
Article
- DOI
10.3390/ma10101206