Intercritical Austenitization of Two Fe-Mn-C Steels

Souza, Matheus Machado de; Guimarães, J.R.C.; Chawla, K. K.

doi:10.1007/bf02644421

Cited by 39 publications

(28 citation statements)

References 5 publications

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“…[8][9][10][11][12][13] In those works, the authors emphasised the importance of the microstructure immediately before intercritical annealing. Roosz et al 14 determined the influence of the initial microstructure on the nucleation rate and grain growth of austenite during isothermal treatment of a eutectoid plain carbon steel.…”

Section: Introductionmentioning

confidence: 99%

Kinetics and dilatometric behaviour of non-isothermal ferrite–austenite transformation

Caballero¹,

Capdevila

Andrés³

2001

Materials Science and Technology

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A model that describes the ferrite-to-austenite transformation during continuous heating in ARMCO iron and three very low carbon low manganese steels with a fully ferrite initial microstructure is presented in this work. This model allows to calculate the volume fraction of austenite and ferrite during transformation as a function of temperature and thus to know the austenite formation kinetics under non-isothermal conditions in full ferritic steels. Moreover, since dilatometric analysis is a technique very often employed to study phase transformations in steels, a second model, that describes the dilatometric behaviour of the steel and calculates the relative change in length which occurs during the ferrite-to-austenite transformation, has been also

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Section: Introductionmentioning

confidence: 99%

Kinetics and dilatometric behaviour of non-isothermal ferrite–austenite transformation

Caballero¹,

Capdevila

Andrés³

2001

Materials Science and Technology

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“…The detailed mechanism of these alloying elements, Cr effect in particular on final structure, is not fully understood. As the final microstructure is strongly dependent on the austenite formation during annealing the evaluation of austenite formation affected by Cr addition are of fundamental importance [4][5][6][7][8] . The austenite formation depends on several factors such as an initial microstructure, degree of ferrite recrystallization, carbon distribution and homogeneity of individual phases.…”

Section: Introductionmentioning

confidence: 99%

“…During intercritical annealing, a complex interaction between recrystallization, grain growth, and phase transformation occurs 9,10 . The degree of such interplay depends, first of all, on the chemical composition of the steel (e.g., microalloying additions) and processing parameters 8,11,12 . In this way, the present study attempts to investigate the effect of Cr addition on the final microstructure of Mn-Mo-Nb-Ti-B dual-phase steels that presents typical composition of higher strength DP steels.…”

Section: Introductionmentioning

confidence: 99%

Effect of Cr Additions on Ferrite Recrystallization and Austenite Formation in Dual-Phase Steels Heat Treated in the Intercritical Temperature Range

et al. 2016

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An experimental investigation was conducted using laboratory-processed low carbon Mn-Mo-Nb-Ti-B dual phase steel with additions of 0.2Cr or 0.6%Cr. This study investigates the effect of Cr additions on ferrite recrystallization and austenite formation during continuous annealing in the intercritical temperature range. It was found that moderate additions of Cr (0.2%) accelerates the ferrite recrystallization (nucleation and growth) resulting in coarse ferrite grains. An increase in Cr content up to 0.6% also accelerates the ferrite recrystallization which in addition to the presence of Cr-rich carbides facilitates the austenitization predominantly through the nucleation process resulted in finer austenite grains. Thereby, the higher Cr content increases the volume of homogenized and refined martensite in the final quenched structure.

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“…Con el descubrimiento de los aceros duales (1)(2)(3), la austenización parcial a temperaturas en la región intercrítica adquiere un gran interés tecnoló-gico y es ampliamente estudiada (4)(5)(6)(7). Todos estos autores señalaron la importancia de la microestructura anterior al recocido intercritico en las propiedades mecánicas finales de dichos aceros.…”

Section: Introductionunclassified

Estudio dilatométrico de la descomposición anisotérmica de la perlita en un acero bajo en carbono (0,11 C-0,50 Mn)

Andrés¹,

Caballero²,

Capdevila³

1998

REVMETAL

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Estudio dilatométrico de la descomposición anisotérmica de la perlita en un acero bajo en carbono (0,HC-0,50Mn) C. García de Andrés^, F.G. Caballero^ y C. Capdevila^Resumen Por medio del análisis dilatométrico de alta resolución, se ha detectado la aparición de una contracción dilatométrica asociada con el proceso de disolución de la perlita, que únicamente aparece cuando la microestructura inicial presenta perlita con un espaciado interlaminar fino. Esta contracción dilatométrica desaparece cuando la estructura inicial presenta una perlita grosera o de mayor espaciado interlaminar, impidiendo así la selección de las temperaturas del intercrítico más apropiadas para la obtención de microestructuras dual de ferrita + martensita con las mejores propiedades mecánicas. En este trabajo se estudia la influencia de la morfología de la perlita inicial de un acero 0,11C-0,50Mn sobre la respuesta dilatométrica asociada al proceso de disolución de dicha fase en calentamiento continuo.Palabras clave: Transformación de fase. Disolución de la perlita. Calentamiento continuo. Espaciado interlaminar. Aceros bajos en carbono.Dilatometric study of non-isothermal pearlite decomposition in 0.11C-0.50Mn low carbón steel Abstract A dilatometric contraction at the onset of the austenitization has been detected by means of highresolution dilatometric analysis. This anomaly was associated with the pearlite dissolution process. A significant effect of pearlite interlamellar spacing on the shape of the dilatometric anomaly has been found. A clear dilatometric anomaly can only be detected when a fine pearlite is present in the starting microstructure of the steel. The identification of the temperature at which pearlite dissolution finishes would make it possible to select the most suitable intercritical temperature to obtain ferrite + martensite dual phase microstructures with an optimum combination of mechanical properties. In the presente work, the influence of starting pearlite morphology on the dilatometric response associated with the pearlite dissolution process during continuous heating has been studied in 0.11C-0.50Mn low carbón steel.

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Intercritical Austenitization of Two Fe-Mn-C Steels

Cited by 39 publications

References 5 publications

Kinetics and dilatometric behaviour of non-isothermal ferrite–austenite transformation

Kinetics and dilatometric behaviour of non-isothermal ferrite–austenite transformation

Effect of Cr Additions on Ferrite Recrystallization and Austenite Formation in Dual-Phase Steels Heat Treated in the Intercritical Temperature Range

Estudio dilatométrico de la descomposición anisotérmica de la perlita en un acero bajo en carbono (0,11 C-0,50 Mn)

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