Study on Recrystallization Behavior of High Strength Automobile Steel Sheets Produced by CSP

Abstract:

The recrystallization behavior of high strength automobile steel sheets (ZJ590L) developed by CSP technology is studied in this paper. The effect of the deformation temperature, reduction on the austenite grain size and the recrystallized fraction of ZJ590L steel during hot deformation has been investigated. Technique of test and analysis includes preparing stepped test piece and quantitative metallograph. The mechanism of austenite microstructure refinement has been discussed, which provides valuable references to set parameters of controlled rolling and controlled cooling process. The analysis shows that the austenite grain size fines with the increase of deformation temperature and reduction, and the recrystallized fraction increases. When the deformation temperature is above 1000°C and reduction exceeds 40%, complete recrystallization can be obtained.

• Periodical: Materials Science Forum (Volumes 475-479)
• Pages: 153-156
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.475-479.153
• Online since: January 2005
• Authors: Zheng Zhi Zhao, Yong Lin Kang, Xin Ping Mao, Yin Li Chen, Gui Jiang Chen, Xue Wen Chen
• Keywords: Automobile Steel, CSP, Microstructure Refinement, Recrystallization

References

[1] R.Mott, D.Chase, and F.Hofmann: MPT International Vol.7 (1994), p.98

[2] S.A.F. Alfonso and F.J. Kueper: Stahl und Eisen Vol. 116(1996), p.65

[3] F.P. Pleschiutschnigg, G.Flemming and W.Hennig: 1999 CSM Annual Meeting, Beijing, China, October 1999, p.19

[4] Gunter Flemming, Karl-Ernst Hensger: MPT International, Vol.1 (2000), p.54

[5] B.Gardiola, M.Humbert and C.Esling: Materials Science and Engineering, A303 (2001), p.60

[6] T.M. Maccagno, J.J. Jonas and P.D. Hodgson: ISIJ International, Vol.36(1996), p.720

[7] Hao Yu, Yonglin Kang and Kelu Wang: Materials Science and Engineering, A363 (2003), p.86