Effect of Annealing Temperature on the Precipitation Behavior and Texture Evolution in a Warm-Rolled P-Containing Interstitial-Free High Strength Steel

doi:10.1007/s40195-014-0072-0

Abstract

Abstract:

By using transmission electron microscopy and electron back-scattered diffraction, the effect of annealing temperature on the precipitation behavior and texture evolution in a warm-rolled interstitial-free high strength steel was studied. The results indicated that fine FeTiP could precipitate at 650 °C, and the number of those precipitates increased greatly with the increasing annealing temperature until 800 °C. Furthermore, the nucleation of FeTiP was influenced by the precipitation of TiC and (Ti, Nb) C. The near absence of FeTiP and a large volume fraction of TiC and (Ti, Nb) C in matrix are envisaged to be primarily responsible for the sharp γ-fiber texture. As the boundary pinning effect caused by FeTiP is weak and there are less interstitial C atoms in matrix. Thus, annealing at 800 °C leads to the highest intensity of γ-fiber texture.

Key words: Interstitial-free high strength (IFHS), Annealing temperature, Precipitate, Texture

Jiecen Zhang, Yu Cao, Guangwei Jiang, Hongshuang Di. Effect of Annealing Temperature on the Precipitation Behavior and Texture Evolution in a Warm-Rolled P-Containing Interstitial-Free High Strength Steel[J]. Acta Metallurgica Sinica (English Letters), 2014, 27(3): 395-400.

Figures/Tables 7

Fig. 1 TEM micrographs showing morphology of different types of precipitates in steels annealed at different temperatures and the corresponding EDX spectra: a–d 650 °C; e, f 700 °C; g–j 750 °C; k, l 800 °C

Fig. 2 TEM micrographs showing the morphology of FeTiP at the grain boundaries in the steel annealed at 700 and 750 °C, and the corresponding EDX spectra: a, b 700 °C; c, d 750 °C

Fig. 3 The constant φ2 = 45° sections of ODF for B170P steel annealed at 650 °C a, 700 °C b, 750 °C c, 800 °C d

Fig. 4 Skeleton lines of γ-fiber texture in B170P steel annealed at different temperatures

Fig. 5 Image quantity (IQ) maps of B170P steel annealed at different temperatures, where γ-fiber oriented grains are indicated by rainbow colors: a 650 °C; b 700 °C; c 750 °C; d 800°°C

Fig. 6 Image quantity (IQ) maps of B170P steel annealed at different temperatures, where α-fiber oriented grains are indicated by rainbow colors: a 650 °C; b 700 °C; c 750 °C; d 800 °C

Fig. 7 Dependence of volume percentage of γ-fiber and α-fiber texture on annealing temperature in B170P steel

References 20

[1]	P. Ghosh, B. Bhattacharya, R.K. Ray, Scr. Mater. 56, 657(2007)10.1016/j.scriptamat.2006.12.044
[2]	P. Ghosh, C. Ghosh, R.K. Ray, Acta Mater. 58, 3842(2010)10.1016/j.actamat.2010.03.048
[3]	P. Ghosh, C. Ghosh, R.K. Ray, ISIJ Int. 49, 1080(2009)10.2355/isijinternational.49.1080
[4]	J. Shi, X. Wang, J. Mater. Eng. Perform. 8, 641(1999)10.1361/105994999770346396
[5]	P. Ghosh, R.K. Ray, C. Ghosh, D. Bhattacharjee, Scr. Mater. 58, 939(2008)10.1016/j.scriptamat.2008.01.056
[6]	P. Ghosh, C. Ghosh, R.K. Ray, D. Bhattacharjee, Scr. Mater. 59, 278(2008)10.1016/j.scriptamat.2008.03.044
[7]	A.S. Ramos, H.R.Z. Sandim, T.M. Hashimoto, Mater. Charact. 45, 171(2000)10.1016/S1044-5803(00)00070-X
[8]	W.M. Guo, Z.C. Wang, N. Xu, Metallogr. Microstruct. Anal. 2, 249(2013)10.1007/s13632-013-0086-4
[9]	A.A. Gazder, M.S. Araizar, J.J. Jonas, E.V. Pereloma, Acta Mater. 59, 4847(2011)10.1016/j.actamat.2011.04.027
[10]	A.M. Oudin, R. Barnett, P.D. Hodgson, Mater. Sci. Eng., A 367, 282(2004)10.1016/j.msea.2003.10.273
[11]	L.J. Ruiz-Aparicio, C.I. Garcia, A.J. DeArdo, Metall. Mater. Trans. A 32, 2325(2001)10.1007/s11661-001-0206-7
[12]	Z.D. Wang, Y.H. Guo, X.H. Liu, J. Mater. Eng. Perform. 15, 646(2006)10.1361/105994906X150795
[13]	J.L. Bocos, E. Novillo, M.M. Petite, Metall. Mater. Trans. A 34, 827(2003)10.1007/s11661-003-1010-3
[14]	Y.X. Wu, D. Tang, H.T. Jiang, Z.L. Mi, H.T. Jing, Acta. Metall. Sin. (Engl. Lett.) 26, 713(2013)10.1007/s40195-013-0232-7
[15]	K. Verbeken, L. Kestens, J.J. Jonas, Scr. Mater. 48, 1457(2003)10.1016/S1359-6462(03)00078-2
[16]	M.R. Toroghinejad, A.O. Humphreys, D.S. Liu, Metall. Mater. Trans. A 34, 1163(2003)10.1007/s11661-003-0136-7
[17]	T. He, Y.D. Liu, W. Sun, L. Zuo, J. Iron. Steel Res. Int. 20, 61(2013)10.1016/S1006-706X(13)60157-0
[18]	Y. Wu, C.S. He, X. Zhao, L. Zuo, T. Watanabe, Acta. Metall. Sin. (Engl. Lett.) 21, 103(2008)10.1016/S1006-7191(08)60026-5
[19]	Y. Chen, X. Chen, C.Y. Li, X.Y. Li, Y.L. Kang, Acta. Metall. Sin. (Engl. Lett.) 25, 324(2012)
[20]	M.S. Araizar, S. Godet, P.J. Jacques, J.J. Jonas, Acta Mater. 54, 3085(2006)10.1016/j.actamat.2006.02.050