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

Valencia, E.; Kestenbach, H.‐J.

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

Cited by 2 publications

(1 citation statement)

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“…This precipitation was confirmed by transmission electron microscopy observations. [25] Previous estimations about the contribution of the precipitation in austenite to the yield stress in steels with similar compositions (0.07 to 0.08C; 0.68 to 1.00Mn; 0.043 to 0.065Nb) to steel A gives the reported value Dr y @ 65 MPa, including the effect of free C. [8,35] C. Strengthening Contribution from Free N and Dynamic Strain Aging…”

Section: Ys/tsmentioning

confidence: 99%

Precipitation of Nb in Ferrite After Austenite Conditioning. Part II: Strengthening Contribution in High-Strength Low-Alloy (HSLA) Steels

Altuna

Iza-Mendia

Gutiérrez

2012

Metall Mater Trans A

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. ALTUNA, AMAIA IZA-MENDIA, and I. GUTIÉ RREZ Often, Nb contributes to the strength of a microalloyed steel beyond the expected level because of the grain size strengthening resulting from thermomechanical processing. Two different mechanisms are behind this phenomenon, and both of them have to do with the amount of Nb remaining in solution after hot rolling. The first of them is the increase of the hardenability of the steel as a result of Nb, and the second one is the fine precipitation of NbC in ferrite. Three Nb microalloyed steels were thermomechanically processed in the laboratory and coiled at different temperatures to investigate the effect of Nb content on the tensile properties. The extra strength was linearly related to the Nb remaining in solution after the hot working. The maximum contribution from Nb was reached for a coiling temperature of 873 K (600°C).

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Section: Ys/tsmentioning

confidence: 99%