Origen y endurecimiento por dispersión de carbonitruros en un acero comercial microaleado al niobio y laminado en caliente

E. Valencia; H. J. Kestenbach

doi:10.3989/revmetalm.1998.v34.i6.817

Origin and dispersion strengthening of carbonitrides in a commercial hot strip microalloyed niobium steel

Authors

E. Valencia Dpto. de Enghenaria de Materiais. Universidade Federal de Sao Carlos, Universidad Central de las Villas (Cuba)
H. J. Kestenbach Dpto. de Enghenaria de Materiais. Universidade Federal de Sao Carlos

DOI:

https://doi.org/10.3989/revmetalm.1998.v34.i6.817

Keywords:

Microalloyed steel, Dispersion, Carbonitrides precipitation, Transmission electron microscopy, Yield strength, Hot strip steel

Abstract

Throughout this work, a study on niobium carbonitrides formation and its hardening effect in a commercial hot strip microalloyed steel is presented. Optic and electron micrographs were obtained while mechanical tests and indirect models allow to predict samples yield strength, taking into account the steel composition and its structural characteristics. The results showed an extended precipitation on austenite boundary cells during the last thermomechanical processing stages, which probably achieved a considerable contribution to the hardening by dispersion in the material studied. Otherwise, no evidence of precipitation in ferrite by means of transmission electron microscopy (TEM) was observed. A poor interphase precipitation was detected in about 10 per cent of the total observed zones with no appreciated contribution to the steel hardness.

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Published

1998-12-30

How to Cite

Valencia, E., & Kestenbach, H. J. (1998). Origin and dispersion strengthening of carbonitrides in a commercial hot strip microalloyed niobium steel. Revista De Metalurgia, 34(6), 488–498. https://doi.org/10.3989/revmetalm.1998.v34.i6.817

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Issue

Vol. 34 No. 6 (1998)

Section

Technical Notes

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