Issue |
Metall. Res. Technol.
Volume 117, Number 1, 2020
|
|
---|---|---|
Article Number | 111 | |
Number of page(s) | 10 | |
DOI | https://doi.org/10.1051/metal/2020005 | |
Published online | 17 February 2020 |
Regular Article
Role of slag on inclusions control and its effect on primary carbides in H13 steel
1
The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology,
Wuhan
430081,
Hubei, PR China
2
Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education, Wuhan University of Science and Technology,
Wuhan
430081,
Hubei, PR China
3
Hubei Provincial Key Laboratory for New Processes of Ironmaking and Steel making, Wuhan University of Science and Technology,
Wuhan
430081, PR China
* e-mail: liguangqiang@wust.edu.cn; liuyu629@wust.edu.cn
Received:
19
November
2019
Accepted:
17
January
2020
The relationship of inclusions and primary carbides in H13 ingot processed by ESR with ANF-6 slag was investigated. It is found that inclusions in H13 ESR ingot are Al2O3, MnS and calcium-aluminate inclusions. The Al2O3 and MnS inclusions are found to be the nucleation cores of the primary carbides, whereas the calcium-aluminate inclusions are not. In order to study the effect of slag on inclusions and primary carbides of H13 steel further, the characteristics of inclusions and primary carbides in steel remelted by ANF-6 and ANF-8 slags were analyzed, and compared to the steel remelted without slag. After being remelted with the ANF-6 (70 mass% CaF2 + 30 mass% Al2O3) and ANF-8 (60 mass% CaF2 + 20 mass% CaO + 20 mass% Al2O3) slags, Al2O3 and CaO contents in calcium-aluminate inclusions increase, respectively. The ANF-8 slag shows stronger desulfurization ability than ANF-6 slag, which contributes to the delay of MnS inclusions precipitation and the decrease of inclusion number, and finally helps to inhibit the precipitation of primary carbides. It implies that the ANF-8 is the promising slag for the ESR process of H13 steel.
Key words: H13 steel / electroslag remelting / inclusion / primary carbide
© EDP Sciences, 2020
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.