Oxidation behavior of boron in 9CrMoCoB steel by CaF2-CaO-Al2O3-SiO2-B2O3 electroslag remelting (ESR) type slagopen access
- Authors
- Duan, Sheng Chao; Lee, Min Joo; Kim, Dong Soo; Park, Joo Hyun
- Issue Date
- Mar-2022
- Publisher
- Elsevier Editora Ltda
- Keywords
- 9CrMoCoB steel; Electroslag remelting (ESR); Ion-molecule coexistence theory; (IMCT); Oxidation; Boron; Silicon
- Citation
- Journal of Materials Research and Technology, v.17, pp 574 - 585
- Pages
- 12
- Indexed
- SCIE
SCOPUS
- Journal Title
- Journal of Materials Research and Technology
- Volume
- 17
- Start Page
- 574
- End Page
- 585
- URI
- https://scholarworks.bwise.kr/erica/handle/2021.sw.erica/111292
- DOI
- 10.1016/j.jmrt.2022.01.033
- ISSN
- 2238-7854
2214-0697
- Abstract
- The laboratory-scale experiments between the CaF2-CaO-Al2O3-SiO2-B2O3 slag and 9CrMoCoB steel were carried out in alumina and magnesia crucibles at 1823 K to investigate the oxidation behavior of boron (B) during the electroslag remelting (ESR) process. The activities of SiO2 and B2O3 in the slag and the activities of Si and B in the molten steel were calculated by the ion and molecule coexistence theory (IMCT) and the Wagner formalism, respectively. The results showed that both SiO2 and B2O3 have a significant influence on the equilibrium B content. The calculated content of B was in good agreement with the experimental value when the SiO2 thorn B2O3 content in the slag is more than 3.3 wt%. The temperature had little influence on the equilibrium B content when the SiO2, B2O3 and CaO content were in the ranges of 3-5 wt%, 0-1 wt%, and 20-30 wt%, respectively. However, the Si is more prone to oxidation than is B as the temperature increases, indicating that more SiO2 should be added in the slag to reduce the oxidation of Si. From the 80 tonnes industrial tests, the distribution of B and Si content along with the radial direction of the remelted ingot was almost uniform, which is in line with the calculated B content (approx. 30 ppm) under conditions of the Si content in the liquid steel and the (%B2O3)/(%SiO2) ratio are 0.07% and 0.05, respectively, at 1973 K.(c) 2022 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
- Files in This Item
-
Go to Link
- Appears in
Collections - COLLEGE OF ENGINEERING SCIENCES > DEPARTMENT OF MATERIALS SCIENCE AND CHEMICAL ENGINEERING > 1. Journal Articles
![qrcode](https://api.qrserver.com/v1/create-qr-code/?size=55x55&data=https://scholarworks.bwise.kr/erica/handle/2021.sw.erica/111292)
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.