Dynamic Recrystallization Behavior of 13%Cr Martensitic Stainless Steel under Hot Working Condition

材料科学技术（英）, 2012, 28(5): 467-473.

Dynamic Recrystallization Behavior of 13%Cr Martensitic Stainless Steel under Hot Working Condition

^1, , ^2, , ^3, , ^4,

1.Metallurgical and Materials Engineering Department, Ferdowsi University of Mashhad, Mashhad 9177948974, Iran

2.Department of Materials Engineering, Sabzevar Tarbiat Moaltem University, Sabzevar 9617976487, Iran

3.Department of Materials Engineering, Sabzevar Tarbiat Moaltem University, Sabzevar 9617976487, Iran

4.Materials Science and Engineering Department, Hamedan University of Technology, Hamedan 6516913418, Iran

关键词：马氏体不锈钢 , 再结晶行为 , 热变形激活能 , 动态再结晶 , 热工 , 临界应变 , 变形温度 , 高应变速率

Dynamic Recrystallization Behavior of 13%Cr Martensitic Stainless Steel under Hot Working Condition

G.R.Ebrahimi ^1, , H.Keshmiri ^2, , A.R.Maldar ^3, , A.Momeni ^4,

1.Metallurgical and Materials Engineering Department, Ferdowsi University of Mashhad, Mashhad 9177948974, Iran

2.Department of Materials Engineering, Sabzevar Tarbiat Moaltem University, Sabzevar 9617976487, Iran

3.Department of Materials Engineering, Sabzevar Tarbiat Moaltem University, Sabzevar 9617976487, Iran

4.Materials Science and Engineering Department, Hamedan University of Technology, Hamedan 6516913418, Iran

Keywords： Hot deformation , Dynamic recrystallization , Critical strain ,

In this study,the effect of hot deformation on martensitic stainless steel was carried out in temperatures between 950 to 1100℃ and strain rates of 0.001,0.01 and 0.1 s 1.Two important dynamic recrystallization parameters,the critical strain and the point of maximum dynamic softening,were derived from strain hardening rate vs stress curves.Then the calculated parameters were used to predict the dynamic recrystallized fraction.Our results show that critical stress and strain increase with decreasing deformation temperature and increasing strain rate.The hot deformation activation energy of the steel is also investigated in the present work with 413 kJ/mol.Our experimental flow curves are in fair agreement with the kinetics of dynamic recrystallization model.

参考文献

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[2]	A.Momeni,A.Shokuhfar,S.M. Abbasi.Dynamic Recrystallization of a Cr-Ni-Mo-Cu-Ti-V Precipitation Hardenable Stainless Steel[J].材料科学技术学报（英文版）,2007(06):775-778.
[3]	A. Momeni;K. Dehghani;G.R. Ebrahimi .Modeling the initiation of dynamic recrystallization using a dynamic recovery model[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2011(39):9387-9393.
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[6]	E. I. POLIAK;J. J. JONAS .Critical Strain for Dynamic Recrystallization in Variable Strain Rate Hot Deformation[J].ISIJ International,2003(5):692-700.

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Dynamic Recrystallization Behavior of 13%Cr Martensitic Stainless Steel under Hot Working Condition

Dynamic Recrystallization Behavior of 13%Cr Martensitic Stainless Steel under Hot Working Condition

参考文献