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THE EFFECTS OF Si AND Mn ON KINETICS OF BAINITE TRANSFORMATION IN Fe-C ALLOY

Liu Shika

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Abstract

The kinetics curves of bainite transformation of Fe-C-Si,Fe-C-Mn andthree kinds of Fe-C-Si-Mn alloys were obtained by using point countingmethod and automatic dilatometer.It can be showed from the obtained resultsthat the characteristic of kinetics of bainite transformation can be explainedby the effect of the segregation of Mn at original grain boundary of austeniteand the solute drag-like effect of Mn.The addition of Si promotes the segrega-tion of Mn and inhibites the precipitation of Fe_3C,thus it has a great effecton the kinetics of the transformation.

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The kinetics curves of bainite transformation of Fe-C-Si,Fe-C-Mn andthree kinds of Fe-C-Si-Mn alloys were obtained by using point countingmethod and automatic dilatometer.It can be showed from the obtained resultsthat the characteristic of kinetics of bainite transformation can be explainedby the effect of the segregation of Mn at original grain boundary of austeniteand the solute drag-like effect of Mn.The addition of Si promotes the segrega-tion of Mn and inhibites the precipitation of Fe_3C,thus it has a great effecton the kinetics of the transformation.

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Available abstract

The kinetics curves of bainite transformation of Fe-C-Si,Fe-C-Mn andthree kinds of Fe-C-Si-Mn alloys were obtained by using point countingmethod and automatic dilatometer.It can be showed from the obtained resultsthat the characteristic of kinetics of bainite transformation can be explainedby the effect of the segregation of Mn at original grain boundary of austeniteand the solute drag-like effect of Mn.The addition of Si promotes the segrega-tion of Mn and inhibites the precipitation of Fe_3C,thus it has a great effecton the kinetics of the transformation.

Key concepts: Dilatometer, Bainite, Materials science, Kinetics, Alloy, Precipitation, Transformation (genetics), Metallurgy

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