Continuous Cooling Transformation Behavior of Vercooling Austenite of Low Carbon-Manganese Steel

Abstract:

Continuous cooling transformation rules of Low Carbon-Manganese Steel were investigated on Gleeble-3500 thermomechanical simulator. The study indicates that as cooling rate increases, Ar3 loweres and Ar1 behaves similarly but much slowly. The microstructure composes of dominant ferrite and some pearlite. As cooling rate enhances, the ferritic grain become finer, when cooling rate is up to 30°C/s, a little bainite appears. With the increasing of cooling rate the dimension of ferrite decreases. Under the experimental deformation conditions, ferritic grain refinement gets weak when the cooling rate is greater than or equal to 20°C/s. Therefore, with a certain strain, ferritic grain can refined to some degree by accelerated cooling.

• Periodical: Advanced Materials Research (Volumes 418-420)
• Pages: 523-527
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.418-420.523
• Online since: December 2011
• Authors: Li Wei Duan, Yun Li Feng, Xue Jing Qi
• Keywords: CCT Curve, Low Carbon-Manganese Steel, Microstructure, Phase Transformation

References

[1] Weixi Song: Metallography (Metallurgical Industry Press, Beijing 1989) (in Chinese)

[2] Francesco Stella, etc. Steel (2003), p.10

[3] Hao Yu: Ph.D. Dissertation, University Of Science and Technology Beijing, Beijing, 2002 (in Chinese)

[4] Chang Lin: Ph.D. Dissertation, University Of Science and Technology Beijing, Beijing, 1999 (in Chinese)

[5] Tianyi Wang: Practice on Thin Slab Casting and Rolling (Metallurgical Industry Press, Beijing 2005) (in Chinese)

[6] Youming Wang, Manyun Li and guang Wei: Rolling and Cooling Control on Steel (Metallurgical Industry Press, Beijing 1995) (in Chinese)