Metall. Res. Technol.
Volume 115, Number 6, 2018
|Number of page(s)||10|
|Published online||07 December 2018|
Effect of subsurface negative segregation induced by M-EMS on componential homogeneity for bloom continuous casting
School of Materials Science and Energy Engineering, Foshan University,
Foshan, Guangdong, PR China
2 School of Mechanical and Automotive Engineering, South China University of Technology, Guangzhou, 510640 Guangdong, PR China
3 Guangdong Shaoguan Iron & Steel Co., Ltd. Baowu steel Group, 512123 Shaoguan, PR China
* e-mail: email@example.com
Accepted: 12 April 2018
The subsurface negative segregation behavior and its effect on componential homogeneity of as-cast bloom within a section size of 320 mm × 425 mm under different stirrer currents were investigated with the aid of numerical simulation. To this end, plant trials were conducted based on a curved bloom caster in Shaoguan steel. The results show that the minimum subsurface negative segregation degree is decreased from 0.977 to 0.858 and its corresponding location moves from 16 mm to 11.9 mm distance from strand surface as the stirrer current is increased from 100 A to 600 A. The carbon content fluctuation range of rolled product cross-section first reduces and then increases because of the integrated effects of two factors: melt temperature at the mold exit center decreases (that is, undercooling is increased), whereas the local segregation degree increases with the increase in the stirrer current. As compared to the normal M-EMS parameters (600 A/2.5 Hz), the fluctuation range of carbon content at the cross-section of rolled product is reduced from 0.038 to 0.012 wt.% under the optimized M-EMS parameters of 200 A/2.5 Hz.
Key words: subsurface negative segregation / M-EMS / componential homogeneity / bloom continuous casting
© EDP Sciences, 2018
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.