Influencia de la microestructura en la fractura de aceros microaleados de forja

J. L. Romero; M. A. Linaza; J. I. San Martín; J. M. Rodríguez-Ibabe; J. J. Urcola

doi:10.3989/revmetalm.1996.v32.i3.912

Influence of the microstructure on the fracture toughness of forging microalloyed steels

Authors

J. L. Romero Centro de Investigaciones Técnicas de Guipúzcoa (CEIT) y Escuela Superior de Ingenieros Industriales (ESII) de San Sebastián. Universidad de Navarra
M. A. Linaza Centro de Investigaciones Técnicas de Guipúzcoa (CEIT) y Escuela Superior de Ingenieros Industriales (ESII) de San Sebastián. Universidad de Navarra
J. I. San Martín Centro de Investigaciones Técnicas de Guipúzcoa (CEIT) y Escuela Superior de Ingenieros Industriales (ESII) de San Sebastián. Universidad de Navarra
J. M. Rodríguez-Ibabe Centro de Investigaciones Técnicas de Guipúzcoa (CEIT) y Escuela Superior de Ingenieros Industriales (ESII) de San Sebastián
J. J. Urcola Centro de Investigaciones Técnicas de Guipúzcoa (CEIT) y Escuela Superior de Ingenieros Industriales (ESII) de San Sebastián

DOI:

https://doi.org/10.3989/revmetalm.1996.v32.i3.912

Keywords:

Microalloyed steels, Thermomechanical treatments, Mechanical properties, Toughness, Microstructure, Acicular ferrite

Abstract

The influence of thermomechanical treatments, first carried out at laboratory and afterwards on an industrial scale on the mechanical properties of microalloyed forging steels is analysed. The influence of hot working conditions and the cooling rate after hot working on both the strength and the toughness is analysed. Optimization of the thermomechanical treatments parameters has been carried out at laboratory and the optimized schedules have been carried out industrially. The actual experimental results of mechanical properties have been rationalized in terms of the microstructure developed during the different thermomechanical treatments. After slow cooling of steel bars hot rolled at low temperature (below 850 °C), the ferrite-pearlite is much refined and the toughness improved. Alternatively, accelerated cooling after hot working at high temperature produces a microstructure of acicular ferrite with improved toughness.

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Published

1996-06-30

How to Cite

Romero, J. L., Linaza, M. A., San Martín, J. I., Rodríguez-Ibabe, J. M., & Urcola, J. J. (1996). Influence of the microstructure on the fracture toughness of forging microalloyed steels. Revista De Metalurgia, 32(3), 167–179. https://doi.org/10.3989/revmetalm.1996.v32.i3.912

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Issue

Vol. 32 No. 3 (1996)

Section

Articles

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