Effect of aging-deformation-treatment on the formation of intragranular ferrite in V-microalloyed steel

ABSTRACT

The influence of the aging-deformation-treatment on the formation of intragranular ferrite (IGF) in a vanadium microalloyed medium carbon steel (Fe–0.34C–1.53Mn) was studied. Effects of aging time on the volume fraction of IGF and austenite grain size were also investigated. The effect of the aging-deformation recrystallisation process on the amount of ferrite and the mechanism of IGF formation was discussed. The results show that aging-deformation-treatment makes the precipitation position of the carbonitride transfer from austenite grain boundary to intragranular, and the precipitated intragranular carbonitrides become the nucleation cores of the IGF during the recrystallisation. The content of precipitated carbonitrides, and the volume fraction of ferrites and the grain size of austenites, increase with the increasing aging time.

KEYWORDS:

• Vanadium
• alloys
• steels
• deformation
• ferrite
• recrystallisation
• formation
• austenite

Disclosure statement

No potential conflict of interest was reported by the authors.

Additional information

Funding

This work was supported by the National Natural Science Foundation of China (No.51102118) and was funded by Jiangsu Provincial Key Laboratory for Interventional Medical Devices (Huaiyin Institute of Technology, JR1413). Science and Technology Support Program of Jiangsu Province (BE2014007-4).