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Characterization Microstructural and Mechanical of X-60 Steel Heat-Treated

Published online by Cambridge University Press:  20 December 2012

N. López Perrusquia ,
J. A. Ortega Herrera ,
M.A. Doñu Ruiz ,
V. J. Cortes Suarez  and
L. D. Cruz Rosado
N. López Perrusquia*
Affiliation:
Instituto Politécnico Nacional, SEPI-ESIME, Adolfo López Mateos, Zacatenco. México.D.F. 07738. México.
J. A. Ortega Herrera
Affiliation:
Instituto Politécnico Nacional, SEPI-ESIME, Adolfo López Mateos, Zacatenco. México.D.F. 07738. México.
M.A. Doñu Ruiz
Affiliation:
Instituto Politécnico Nacional, SEPI-ESIME, Adolfo López Mateos, Zacatenco. México.D.F. 07738. México.
V. J. Cortes Suarez
Affiliation:
Univerisdad Autónoma Metropolitana Unidad Azcapotzalco, Av. San Pablo 180 Azcapotzalco 02200, México .D.F. Área de Ciencia de los materiales.
L. D. Cruz Rosado
Affiliation:
Universidad Politécnica del Valle de México, Grupo Ciencia e Ingeniería de Materiales. Av. Mexiquense, Tultitlán. Edo. México. México.
*
*E-mail: [email protected]
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Abstract

In this paper was study the effect of heat treatment on mechanical properties of an API X-60 steel used for storage and transportation of hydrocarbons.In the first stage evaluation are mechanical properties of steel heat treated by the technique of the three-point test according to ASTM 399-90 was carried out. In the second stage, characterization of the type of failure and microstructure through optical microscopy (OM) was determined; also heat treated samples were then mechanically tested for hardness (HRC) and nano-indentation. The presence of alloying elements by scanning electron microscopy (SEM) and the fracture surfaces generated in the steel with varying times, temperatures and cooling medium generated by different modes of solicitation (Bending), likewise with loading rates were determined. The results revealed a ductile fracture and microstructures (PF) ferrite-pearlite (DP), bainite -ferrite (BF) and martensite-retained and martensite/retained austenite (MA). Finally, this article discusses the effect of heat treatment followed by precipitation hardenable of steel API X-60 on the mechanical properties

Keywords

steeloptical metallographyscanning electron microscopy (SEM)
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1481: Symposium 2D – Structural and Chemical Characterization of Metals, Alloys and Compounds—2012 , 2012 , pp. 63 - 69
Copyright
Copyright © Materials Research Society 2012

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