Hostname: page-component-78c5997874-s2hrs Total loading time: 0 Render date: 2024-11-05T06:10:52.819Z Has data issue: false hasContentIssue false
  • English
  • Français

Bainitic transformation behavior of ultra-high strength 30CrNi3MoV steel after experiencing small deformation in the nonrecrystallization austenite region

Published online by Cambridge University Press:  11 October 2013

Zhixia Qiao ,
Yongchang Liu ,
Baoqun Ning ,
Huijun Li ,
Zesheng Yan ,
Xiaosheng Zhou  and
Lianjin Li
Zhixia Qiao*
Affiliation:
School of Mechanical Engineering, Tianjin University of Commerce, Tianjin 300134, People’s Republic of China; and School of Material Science and Engineering, Tianjin Key Laboratory of Advanced Jointing Technology, Tianjin University, Tianjin 300072, People’s Republic of China
Yongchang Liu
Affiliation:
School of Material Science and Engineering, Tianjin Key Laboratory of Advanced Jointing Technology, Tianjin University, Tianjin 300072, People’s Republic of China
Baoqun Ning
Affiliation:
School of Materials Science and Engineering, Tianjin University of Technology, Tianjin 300384, People’s Republic of China
Huijun Li
Affiliation:
School of Material Science and Engineering, Tianjin Key Laboratory of Advanced Jointing Technology, Tianjin University, Tianjin 300072, People’s Republic of China
Zesheng Yan
Affiliation:
School of Material Science and Engineering, Tianjin Key Laboratory of Advanced Jointing Technology, Tianjin University, Tianjin 300072, People’s Republic of China
Xiaosheng Zhou
Affiliation:
School of Material Science and Engineering, Tianjin Key Laboratory of Advanced Jointing Technology, Tianjin University, Tianjin 300072, People’s Republic of China
Lianjin Li
Affiliation:
School of Mechanical Engineering, Tianjin University of Commerce, Tianjin 300134, People's Republic of China
*
a)Address all correspondence to this author. e-mail: [email protected]
Get access

Abstract

Using a combination of high-resolution dilatometric measurements and microstructural analysis, this study investigated the bainitic transformation behavior in ultra-high strength 30CrNi3MoV steel after experiencing small deformation at 850 °C (in the nonrecrystallization austenite region). Under the influence of the small deformation in the nonrecrystallization austenite region, the bainite starting temperature (Bs) raised, the bainite finishing temperature (Bf) decreased, granular bainite was promoted to form, and intersections of differently oriented bainite laths became more common in the microstructure. The increase of Bs is owing to the stored energy in distorted austenite grain boundaries, which can serve as an extra mechanical driving force for bainitic transformation during continual cooling. The decrease of Bf can attributed to the more universal intersections of bainite laths with different orientations, which can decelerate the overall growth rate of bainite. The promoted formation of granular bainite is closely related to the increase of Bs because granular bainite usually forms at relatively high temperatures in the bainite range, above upper bainite and lower bainite.

Keywords

bainiteultra-high strength steelaustenitedeformation
Type
Articles
Information
Journal of Materials Research , Volume 28 , Issue 20 , 28 October 2013 , pp. 2844 - 2851
Copyright
Copyright © Materials Research Society 2013 

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

Zhao, M.C., Yang, K., and Shan, Y.Y.: The effects of thermo-mechanical control process on microstructures and mechanical properties of a commercial pipeline steel. Mater. Sci. Eng., A 335, 14 (2002).CrossRefGoogle Scholar
Knapinski, M., Dyja, H., Kawalek, A., Fraczek, T., and Laber, K.: Analysis of the microstructure evolution during thermo-mechanical treatment of the steel plates in grade X80-X100. Metallurgy 52(2), 239 (2013).Google Scholar
Qi, S.Z., Zhang, P.J., Du, L.X., Liu, X-H., and Wang, G-D.: Controlled rolling and controlled cooling technology of ultra-high strength steel with 700 MPa grade. J. Iron Steel Res. Int. 11(3), 27 (2004).Google Scholar
Xu, X.X., Bai, B.Z., Liu, D.Y., and Yuan, Y.: Effect of thermomechanical treatment temperature on structure and properties of CFB/M ultra-high strength steel. J. Iron Steel Res. Int. 17(4), 66 (2010).CrossRefGoogle Scholar
Kurahashi, R. and Chikushi, I.: Ultra fine grain steel production at nakayama hot strip and plate mill. Proceeding of the 4th Workshop on the Development of High Performance Structural Steels for 21st Century (Pohang Iron and Steel, Pohang, Korea, 2002) p. 217.Google Scholar
Yu, W., Qian, Y.J., Wu, H.B., and Yang, Y.H.: Effect of heat treatment process on properties of 1000 MPa ultra-high strength steel. J. Iron Steel Res. Int. 18(2), 64 (2011).CrossRefGoogle Scholar
Khlestov, V.M., Komopleva, E.V., and McQueen, H.J.: Kinetics of austenite transformation during thermomechanical processes. Can. Metall. Q. 37, 75 (1998).CrossRefGoogle Scholar
Boratto, F., Barbosa, R., Yue, S., and Jonas, J.J.: Proc. of Int. Conf. on Phys. Metall. of Thermomechanical Processing of Steels and Other Metals (Thermec-88) (ISIJ, Tokyo, 1988), p. 383.Google Scholar
Lin, H.G. and Fu, D.Z.: Principles, Measurements and Applications of Transformation Curve of Austenite in Steels (Mechanical Industry Press, Beijing, 1988), p. 262.Google Scholar
Qiao, Z.X., Liu, Y.C., Yua, L.M., and Gao, Z.M.: Incompleted bainitic transformation characteristics in an isochronally annealed 30CrNi3MoV steel. J. Alloys Compd. 478, 334 (2009).CrossRefGoogle Scholar
Bhadeshia, H.K.D.H.: Bainite in Steels, Transformations, Microstructure and Properties, 2nd ed. (IOM Communications, Ltd., UK, 2001), p. 136.Google Scholar
Bhadeshia, H.K.D.H.: Bainite in Steels, Transformations, Microstructure and Properties, 2nd ed., (IOM Communications, Ltd., UK, 2001), p. 204.Google Scholar
Qiao, Z.X., Liu, Y.C., Yu, L.M., and Gao, Z.M.: Formation mechanism of granular bainite in a 30CrNi3MoV steel. J. Alloys Compd. 475, 560 (2009).CrossRefGoogle Scholar
Xu, Z.Y. and Liu, S.K.: Bainitic Transformation and Bainite (Scientific Press, Beijing, 1991).Google Scholar
Bhadeshia, H.K.D.H.: Bainite in Steels, Transformations, Microstructure and Properties, 2nd ed. (IOM Communications, Ltd., UK, 2001), p. 129.Google Scholar