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Transformation Behavior of Austenite Continuous Cooling for Nb-V Micro-Alloyed Low Carbon Steel

Jianping Li

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Abstract

The transformation behavior of Nb-V micro-alloyed low carbon austenite steel during continuous cooling was investigated through Gleeble-3800 themomechanical simulator and metallographic analysis.The experimental results show that the dynamic CCT diagrams shift to the left and upper compared with the static ones,the begin temperature of A→α-Fe transformation is gradually lower with the increase of cooling rate.The high temperature deformation improves Ferrite and Pearlite transformation and decreases Ferrite transformation zone.When the cooling rate is lower,the deformation improves Bainite transformation;when the cooling rate is higher,the deformation restrains Bainite transformation.

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What this paper is about

The transformation behavior of Nb-V micro-alloyed low carbon austenite steel during continuous cooling was investigated through Gleeble-3800 themomechanical simulator and metallographic analysis.The experimental results show that the dynamic CCT diagrams shift to the left and upper compared with the static ones,the begin temperature of A→α-Fe transformation is gradually lower with the increase of cooling rate.The high temperature deformation improves Ferrite and Pearlite transformation and decreases Ferrite transformation zone.When the cooling rate is lower,the deformation improves Bainite transformation;when the cooling rate is higher,the deformation restrains Bainite transformation.

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Available abstract

The transformation behavior of Nb-V micro-alloyed low carbon austenite steel during continuous cooling was investigated through Gleeble-3800 themomechanical simulator and metallographic analysis.The experimental results show that the dynamic CCT diagrams shift to the left and upper compared with the static ones,the begin temperature of A→α-Fe transformation is gradually lower with the increase of cooling rate.The high temperature deformation improves Ferrite and Pearlite transformation and decreases Ferrite transformation zone.When the cooling rate is lower,the deformation improves Bainite transformation;when the cooling rate is higher,the deformation restrains Bainite transformation.

Key concepts: Bainite, Austenite, Materials science, Continuous cooling transformation, Ferrite (magnet), Pearlite, Metallurgy, Isothermal transformation diagram

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