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Microstructural Evolution of High Dimension Rings of Steel AISI 4140

Published online by Cambridge University Press:  31 January 2012

E. Martínez ,
C. Márquez ,
J. Rodríguez ,
F. Fernández ,
J. Cárdenas  and
A. Pérez
E. Martínez
Affiliation:
Universidad Autónoma de Nuevo León, FIME, Ave. Universidad s/n, Cd. Universitaria, San Nicolás de los Garza, N.L. 66450 México. Email: [email protected]
C. Márquez
Affiliation:
Universidad Autónoma de Nuevo León, FIME, Ave. Universidad s/n, Cd. Universitaria, San Nicolás de los Garza, N.L. 66450 México. Email: [email protected] Frisa Forjados, S.A. de C.V. P.O. Box 1273, Monterrey, N.L. 64000 México
J. Rodríguez
Affiliation:
Frisa Forjados, S.A. de C.V. P.O. Box 1273, Monterrey, N.L. 64000 México
F. Fernández
Affiliation:
Frisa Forjados, S.A. de C.V. P.O. Box 1273, Monterrey, N.L. 64000 México
J. Cárdenas
Affiliation:
Frisa Forjados, S.A. de C.V. P.O. Box 1273, Monterrey, N.L. 64000 México
A. Pérez
Affiliation:
Universidad Autónoma de Nuevo León, FIME, Ave. Universidad s/n, Cd. Universitaria, San Nicolás de los Garza, N.L. 66450 México. Email: [email protected]
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Abstract

This paper presents the results of the analytical study of the microstructural evolution of forged and rolled rings with a diameter greater than 2 meters, since the raw material, set-up forgings, ring rolling and heat treatments, including normalizing, quenching and tempering. Also, great care will be taken on the chemical micro-segregation. Four rings, were instrumented with 20 thermocouples each one in order to follow the thermal profile during heating and quenching. Cooling rates will be used to predict the microstructure developed under the different heat treatments and it will be compared at different positions inside the rings. It can be seen that the cooling curves obtained show no presence of soft phases, as shown in the microstructures in the figure shown below. With the results of microstructure obtained, which show martensitic structure to a greater extent, it meets the desirable mechanical properties, which are shown below.

Keywords

SteelMicrostructureStressPolymerStructural
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1372: Symposium S3 – Structural and Chemical Characterization of Metal Alloys and Compounds—2011 , 2012 , imrc-1372-s3-p82
Copyright
Copyright © Materials Research Society 2012

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References

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