Effect of mold electromagnetic stirring on solidification structure and solute segregation in continuous casting bloom

2022 ◽  
Author(s):  
Dong-bin Jiang ◽  
Li-feng Zhang ◽  
Ya-dong Wang
Keyword(s):  
Continuous Casting ◽  
Solute Segregation ◽  
Electromagnetic Stirring ◽  
Solidification Structure

Solidification structure of continuous casting large round billets under mold electromagnetic stirring

2016 ◽  
Vol 23 (4) ◽  
pp. 329-337 ◽  
Author(s):  
Tao Sun ◽  
Feng Yue ◽  
Hua-jie Wu ◽  
Chun Guo ◽  
Ying Li ◽  
...  
Keyword(s):  
Continuous Casting ◽  
Electromagnetic Stirring ◽  
Solidification Structure ◽  
Large Round

Effects of electromagnetic stirring on fluid flow and temperature distribution in billet continuous casting mould and solidification structure of 55SiCr

2017 ◽  
Vol 115 (1) ◽  
pp. 103 ◽  
Author(s):  
Hanghang An ◽  
Yanping Bao ◽  
Min Wang ◽  
Lihua Zhao
Keyword(s):  
Fluid Flow ◽  
Continuous Casting ◽  
Optimal Parameter ◽  
High Carbon Steel ◽  
Mathematic Model ◽  
Optimal Combination ◽  
Electromagnetic Stirring ◽  
Solidification Structure ◽  
Current Intensity ◽  
Cast Billet

The optimal combination of current intensity and frequency of mould electromagnetic stirring (M-EMS) in continuous casting billet was a crucial compromise for improving inner quality of cast billet such as reduction in center segregation and porosity of medium-high carbon steel. In the present study, a decoupled three-dimensional mathematic model of electromagnetic field, fluid flow and heat transfer in continue casting billet mould with EMS has been developed, and the effects of current intensity and frequency on the system were also discussed. In addition, the industrial trials were carried out to investigate the magnetic field characteristics in the mould with M-EMS and the influence of M-EMS on the solidification structure of 55SiCr. According to the calculations and analysis, the optimal combination range of current intensity and frequency was 300–320 A and 3–4 Hz, respectively. The results showed that inner quality in as-cast billet of 55SiCr has been improved significantly with optimal parameter of 320 A and 3 Hz. For instance, central equiaxed zone increased from 19% to 33%, the center carbon segregation ratio decreased from 1.13 to 1.05 as well as center porosity has nearly disappeared.

Influence of the configuration of the submerged entry nozzle inner channel and electromagnetic effect within its length on the qualitative distribution of metal flows during continuous casting of steel

2021 ◽  
pp. 17-22
Author(s):  
A. Yu. Tretyak ◽  
◽  
Qiang Wang ◽  
Chun-Lei Wu ◽  
E. I. Shifrin ◽  
...  
Keyword(s):  
Quality Control ◽  
Continuous Casting ◽  
Submerged Entry Nozzle ◽  
Electromagnetic Stirring ◽  
Continuous Casting Of Steel ◽  
Electromagnetic Effect ◽  
Inner Surface ◽  
Continuously Cast ◽  
Inner Channel ◽  
Research Show

Today, the most promising and effective method of quality control of the continuously cast billets is electromagnetic stirring of the melt. In this case, an important component is the effect of the stirring on the jet in the nozzle. Moreover, as research has shown, this method is highly dependent on the configuration of the inner channel of the nozzle. Research have shown that positive or negative taper of the inner surface of the nozzle allows to obtain different results after applying EMS. Taper control completely changes the pattern of the melt flow and its deceleration in the mold, especially when it is casting of large billets. The results of the research show that minor changes in the taper of the nozzle significantly increase the effect of EMS implementation, which is observed already at 0.27 % of positive the taper and increases to 0.54%.

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