Isothermal transformation (TTT) behavior of the low carbon steels with two Si con-tents (0.50 wt pct and 1.35 wt pct) was investigated with and without the prior deformation. The results show that Si and the prior deformation of the austenite have significant effects on the transformation of the ferrite and bainite. The addition of Si refines the ferrite grains, accelerates the polygonal ferrite transformation and the formation of M/A constituents, leading to the improvement of the strength. The ferrite grains formed under the prior deformation of the austenite become more ho-mogeneous and refined. However, the influence of deformation on the tensile strength of both steels is dependent on the isothermal temperatures. Thermodynamic calcu-lation indicates that Si and prior deformation reduce the incubation time of both ferrite and bainite transformation, but the effect is weakened by the decrease of the isothermal temperatures.
参考文献
| [1] | A Kumar;S B Singh;K K Ray .[J].Materials Science and Engineering,2008,474A:270. |
| [2] | K Hasegawa;K Kawamura;T Urabe;Y Hosoya .[J].ISIJ International,2004,44(03):603. |
| [3] | R.D.K. MISRA;S.W. THOMPSON;T.A. HYLTON .Microstructures of Hot-Rolled High-Strength Steels with Significant Differences in Edge Formability[J].Metallurgical and Materials Transactions, A. Physical Metallurgy and Materials Science,2001(3a):745-760. |
| [4] | R A Kot;B L Bramfitt.Fundamentals of Dual-Phase steels[M].Metallurgical Society of AIME,Warrendale,PA,1981:447. |
| [5] | M Takahashi;O Kawano;T Hayashida .[J].NIPPON STEEL TECHNICAL REPORT,2003,378:7. |
| [6] | T Araki;I Kozasu;H Tankechi;K Shibata,M Enomoto and H Tamehiro .[J].ISIJ International,1992,1(04):1. |
| [7] | L J Zhu;D Wu;X M Zhao .[J].Acta Metall Sin(Engl lett),2008,21(03):163. |
| [8] | I Tsukatani;S Hashimoto;T Inoue .[J].ISIJ International,1991,31(09):992. |
| [9] | E Essadiqi;J J Jonas .[J].Metallurgical and Materials Transactions,1991,19A:417. |
| [10] | X Fang;Z Fan;B Ralph .[J].Journal of Materials Science,2003,38:3877. |
| [11] | P G Xu;B Z Bai;H S Fang;Z J Wang,J P Wang and Y K Pan .[J].Journal of University of Science and Technology Beijing,2003,10(02):39. |
| [12] | R L Larn;J R Yang .[J].Materials Science and Engineering,2000,278A:278. |
| [13] | C.Capdevila;C.Garcia de Andres;F.G.Caballero .INCUBATION TIME OF ISOTHERMALLY TRANSFORMED ALLOTRIOMORPHIC FERRITE IN MEDIUM CARBON STEELS[J].Scripta materialia,2001(1):129-134. |
| [14] | Z Y Xu;L W Mou .[J].Acta Materialia,1987,23A(01):33. |
| [15] | Z Y Liu;G D Wang;L X Ma .[J].Acta Materialia,1994,30B(06):277. |
| [16] | Z Y Liu;Y B Xun;C D Wang.Simulation and Predication of the Evolution of Microstructure and Properties of Hot Rolled Steels[M].Northeastern University Press,Shenyang,2004:156. |
| [17] | M. GOMEZ;S. F. MEDINA;G. CARUANA .Modelling of Phase Transformation Kinetics by Correction of Dilatometry Results for a Ferritic Nb-microalloyed Steel[J].ISIJ International,2003(8):1228-1237. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%