A static recrystallization behavior between the rolling passes of a martensitic heatresistant stainless steel 403Nb has been studied by OM,TEM and double-hit thermomechanical simulator to explore the effects of deformation temperature,strain rate,strain and the prior austenite grain size.The results show that increases of deformation temperature and strain rate and strain can promote the static recrystallization of 403Nb steel.Static recrystallization also proceeds faster when the prior austenite grain size is smaller.Microstructural observation indicates that the volume fraction of static recrystallization increases with prolonged interval of the rolling passes.Straininduced precipitation can lead to an appearance of a platform in the kinetic curve of static recrystallization.Different from the conventional micro-alloying steel,the strain-induced precipitates in 403Nb steel during hot rolling are carbides containing Nb and Cr.
参考文献
| [1] | V. Knezevic;J. Balun;G. Sauthoff .Design of martensitic/ferritic heat-resistant steels for application at 650 deg C with supporting thermodynamic modelling[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2008(1/2):334-343. |
| [2] | J. Hald .Microstructure and long-term creep properties of 9-12% Cr steels[J].International Journal of Pressure Vessels and Piping,2008(1/2):30-37. |
| [3] | W.P.SUN .Comparison between Static and Metadynamic Recrystallization-An Application to the Hot Rolling of Steels[J].ISIJ International,1997(10):1000-1009. |
| [4] | G.LI;T.M.Maccagno .Effect of Initial Grain Size on the Static Recrystallization Kinetics of Nb Microalloyed Steels[J].ISIJ International,1996(12):1479-1485. |
| [5] | S.F. MEDINA;A. QUISPE .Improved Model for Static Recrystallization Kinetics of Hot Deformed Austenite in Low Alloy and Nb/V Microalloyed Steels[J].ISIJ International,2001(7):774-781. |
| [6] | H.S.ZUROB;Y.BRECHET;G.PURDY .A MODEL FOR THE COMPETITION OF PRECIPITATION AND RECRYSTALLIZATION IN DEFORMED AUSTENITE[J].Acta materialia,2001(20):4183-4190. |
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