Study on Pack Rolling and Annealing Process for Ultra-Fined Grain Austenite Stainless Steel

Abstract:

In this study, ultra-fined grain austenite stainless steel was obtained by pack rolling and subsequent annealing. The microstructure and defect were analyzed by using scanning electronic microscopy (SEM) and X-ray diffraction (XRD), etc. Thus the influence of the rolling reduction, the annealing temperature and the annealing time on the microstructure of 304 austenite stainless steel was accomplished. The results indicate that with the pack rolling reduction increased, the grains were elongated more obviously along the rolling direction. There were numerous dislocations and twinning within the grains. Moreover, there is amount of strain induced martensite with the rolling. The grains were remarkable refined after annealing, in which the microstructure was reversed and recrystallized, and the strain induced the martensite transferred to austenite. The average grain size decreased to 0.5μm with the sample of the 75% rolling reduction after annealing at 800°C for 30 minutes. In addition, the mechanism of the pack rolling on the grain size reduction was analyzed.

• Periodical: Materials Science Forum (Volume 789)
• Pages: 303-307
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.789.303
• Online since: April 2014
• Authors: Yu Lai Chen*, Jing Huang, Fei Fang
• Keywords: Annealing, Pack Rolling, Recrystallization, Ultra-Fined Grain

References

[1] G. Yang, C. Hu, C. Wang, Review and prospect of severe plastic deformation: properties of bulk nanometer crystalline materials, Special Steel Technol. 3(2008) 1-16

[2] M.Y. Zhan, Y.Y. Li, W.P. Chen, Status and expectation of research on accumulative roll-bonding, Chin. J. Nonferrous Met. 6(2007) 17-22.

[3] S.C. Fei, Effect of cold rolling and annealing process on microstructure and mechanical properties of SUS304, Gansu: Lanzhou University of Technology, (2011)

[4] M. Eskandari, A. Najafizadeh, A. Kermanpur, Effect of strain-induced martensite on the formation of nanocrystalline 316L stainless steel after cold rolling and annealing, Mater. Sci. Eng., A 519(2009) 46-50

DOI: 10.1016/j.msea.2009.04.038

[5] I. Shakhova, V. Dudko, A. Belyakov, K. Tsuzaki, R. Kaibyshev, Effect of large strain cold rolling and subsequent annealing on microstructureand mechanical properties of an austenitic stainless steel, Mater. Sci. Eng., A 545(2012) 176-186

DOI: 10.1016/j.msea.2012.02.101

[6] X. Huang, N. Tsuji, N.Hansen, Microstructural evolution during accumulative roll-bonding of commercial purity aluminum, Mater. Sci. Eng., A 340(2003) 265-271.

DOI: 10.1016/s0921-5093(02)00182-x

[7] G.B. Olsen, M. Cohen, Kinetics of strain-induced martensite nucleation, Metall. Trans. 6(1975) 791-795.

[8] C.G. Mo, G. Liu, B.L. Wu, L. Zuo, Surface nanocrystallization of 1Cr18Ni9Ti stainless steel induced by shear deformation . J. Northeastern Univer.(Nat. Sci.) 33(2012) 815-818.