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J Mater Sci Technol  2006, Vol. 22 Issue (02): 159-163    DOI:
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Effect of V and V-N Microalloying on Deformation-Induced Ferrite Transformation in Low Carbon Steels
Kai WANG, Lijun WANG, Wenfang CUI, Chunming LIU
School of Materials and Metallurgy, Northeastern University, Shenyang 110004, China
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Abstract  Deformation-induced ferrite transformation (DIFT) has been proved to be an effective approach to refine ferrite grains. This paper shows that the ferrite grains can further be refined through combination of DIFT and V or V-N microalloying. Vanadium dissolved in γ matrix restrains DIFT. During deformation, vanadium carbonitrides rapidly precipitate due to strain-induced precipitation, which causes decrease in vanadium dissolved in matrix and indirectly accelerates DIFT. Under heavy deformation, deformation induced ferrite (DIF) grains in V microalloyed steel were finer than those in V free steel. The more V added to steel, the finer DIF grains obtained. Moreover, the addition of N to V microalloyed steels can remarkably accelerate precipitation of V, and then promote DIFT. However, DIF grains in V-N microalloyed steel easily coarsen.
Key words:  Deformation induced ferrite transformation      Strain induced precipitation      V microalloyed steel...      
Received:  07 April 2005     
Corresponding Authors:  Kai WANG     E-mail:

Cite this article: 

Kai WANG, Lijun WANG, Wenfang CUI, Chunming LIU. Effect of V and V-N Microalloying on Deformation-Induced Ferrite Transformation in Low Carbon Steels. J Mater Sci Technol, 2006, 22(02): 159-163.

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