Austenite Decomposition in Low Carbon Steels with Microalloy Additions

Abstract:

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A metallurgical model to describe the formation of ferrite, perlite and bainite during continuous cooling was developed. The model uses classical nucleation and early growth theories to calculate the beginning of the reaction, and Avrami-type equations to evaluate the transformation progress. The materials studied were plain carbon steels with different Mn contents, and microalloyed steels with Nb, Ti and/or V additions. The model predictions were adjusted and validated with experimental results obtained from dilatometric tests. The range of cooling rates considered was between 5°C/sec and 50°C/sec. From the comparison with the experimental data it was found that the model correctly describes the dependence of the reaction kinetic on the cooling rate, as well as on the steel chemistry.

Info:

Periodical:

Materials Science Forum (Volumes 500-501)

Edited by:

J.M. Rodriguez-Ibabe, I. Gutiérrez, B. López and A. Iza-Mendia

Pages:

395-402

DOI:

10.4028/www.scientific.net/MSF.500-501.395

Citation:

G.R. Gomez et al., "Austenite Decomposition in Low Carbon Steels with Microalloy Additions", Materials Science Forum, Vols. 500-501, pp. 395-402, 2005

Online since:

November 2005

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Price:

$35.00

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