›› 2016, Vol. 32 ›› Issue (3): 29-35.

• Solidification & continuous Casting • Previous Articles     Next Articles

Position determination of the final-electromagnetic stirring of continuous billets

  

  1. 1. School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing
    2. University of Science and Technology Beijing
    3. Collaborative Innovation Center of Steel Technology in University of Science and Technology Beijing
    4. 1) School of Metallurgical and Ecological Engineering , University of Science and Technology Beijing
  • Received:2015-10-19 Revised:2015-12-30 Accepted:1900-01-01 Online:2016-06-05 Published:2016-06-15

Abstract: To improve the quality of continuous billets and reduce the central segregation of 72A tire cord steel, mathematical model of solidification and heat transfer was developed, then the model was revised based on the results of pin shooting tests and temperature measurements. By using the above revised model and numerical simulating, the appropriate position of final-electromagnetic stirring (F-EMS) was determined. The results showed that, the appropriate position of final-electromagnetic stirring (F-EMS) moved from 7.26—7.64 m back to 8.95—9.41m when the casting speed increased from 1.60 m/min to 1.90 m/min, it also moved from 7.95—8.35m back to 8.17—8.61m when the casting temperature increased from 1 485℃ to 1 498℃. Considering the influence of the temperature fluctuations, the optimal position of F-EMS was at distance from liquid meniscus 8.17—8.35m when the casting speed was 1.75m/min. The industrial tests showed that，when the casting speed was 1.75m/min, the center of F-EMS was at distance from liquid meniscus 8.25m, the center porosity grade and pipe grade both declined from 1.0 to less than 0.5, the center carbon segregation index also decreased from 1.15 to less than 1.05, the quality of continuous billets had improved.

Key words: billets, numerical simulation, center solid fraction, final-electromagnetic stirring

CLC Number: