Influence of Prior Austenite Deformation and Non-Metallic Inclusions on Ferrite in Low Carbon Steels

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Abstract Abstract Effects of prior austenite deformation and non-metallic inclusions on the ferrite nucleation and grain refinement of two kinds of low carbon steels have been studied. The ferrites nucleation on MnS and V(C,N) is observed. The combination of thermal-mechanical processes with adequate amounts of non-metallic inclusions formed in low carbon steels could effectively refine the grain size and the microstructure. Ferrite nucleated on the single MnS or V(C,N) inclusions and complex MnS+V(C,N) inclusion. The proper addition of elements S and V could effectively promote the formation of ferrite and further refinement of ferrite grains.

Key words�� austenite deformation Non-metallic inclusions Ferrite nucleation low carbon steel

Received: 15 May 2009

Corresponding Authors: Z.G. Yang

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ZHANG Chi,et al. Influence of Prior Austenite Deformation and Non-Metallic Inclusions on Ferrite in Low Carbon Steels[J]. Chinese Journal of Iron and Steel, 2010, 17(6): 36-42.

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http://gt.chinamet.cn/Jweb_gtyjxb_en/EN/ OR http://gt.chinamet.cn/Jweb_gtyjxb_en/EN/Y2010/V17/I6/36