Desgaste de las características mecánicas en las conducciones de acero Cr-Mo de baja aleación tras un uso prolongado en el transporte del vapor en una central térmica

D. Mihai; L. G. Bujoreanu

doi:10.3989/revmetalm.2002.v38.i6.433

Mechanical properties degradation in a Cr-Mo low-alloy steel pipe after prolonged use for gas transport in a power plant station

Authors

D. Mihai Departamento PublicacionesThe "Gh. Asachi”, Technical University of lasi, Faculty of Mechanical Engineering, Strength of Materials Department.
L. G. Bujoreanu The "Gh. Asachi”,'Technical University of lasi. Faculty of Materials Science and Engineering, Metals Technology Department

DOI:

https://doi.org/10.3989/revmetalm.2002.v38.i6.433

Keywords:

Transporte prolongado del vapor, Ensayos mecánicos, Anisotropía, Micrografías ópticas, Precipitación de los carburos,

Abstract

Some prolonged exposure effects at the high temperatures and pressures characteristic to the steam transport in power station, have been revealed in a 12HMF GOST (13CrMo44 DIN) Cr-Mo low alloy steel pipes, at both macro and microstructural level, by mechanical tests and optical microscopy. After 128625 functioning hours, a marked mechanical degradation was noticed by the values of tensile strength, hardness and toughness that decreased with 14-16 %, 45-48 % and 47-59 %, respectively. This lose of mechanical properties was correlated on one hand to the coalescence of ferrite grains and pearlite islets and on the other hand to a decrease in the anisotropy of the grains morphology.

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Published

2002-12-30

How to Cite

Mihai, D., & Bujoreanu, L. G. (2002). Mechanical properties degradation in a Cr-Mo low-alloy steel pipe after prolonged use for gas transport in a power plant station. Revista De Metalurgia, 38(6), 464–468. https://doi.org/10.3989/revmetalm.2002.v38.i6.433

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Issue

Vol. 38 No. 6 (2002)

Section

NO_SECCION_SI_RESUMEN

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