Influence of incomplete dissolution of precipitates on static recrystallization of vanadium microalloyed steels

Journal Article · Wed May 15 04:00:00 EDT 1996 · Scripta Materialia

DOI:https://doi.org/10.1016/1359-6462(96)00020-6· OSTI ID:247979

Revidriego, F J; Abad, R; Lopez, B; Gutierrez, I; Urcola, J J ^[1]

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1. Centro de Estudios e Investigaciones Tecnicas de Guipuzcoa, San Sebastian (Spain)

Static recrystallization plays an important role in the design of rolling schedules for the controlled rolling of microalloyed steels. This softening mechanism has a significant effect on the hot strength of austenite and also in the final microstructure, and hence in the final properties of a hot rolled steel. Additions of elements, like niobium, titanium, and vanadium, produce time delays in static recrystallization. It is widely recognized that the retardation of austenite recrystallization is due in part to solute drag but also to strain-induced precipitation, the latter exerting usually the stronger effect. Retardation in the time of recrystallization is the effect used during conventional controlled rolling in which low finishing rolling temperature (below the RST) are used to produce elongated unrecrystallized austenite grains which can transform to very fine polygonal ferrite. On the contrary when recrystallization controlled rolling is used the maximum number of passes above the RST are given to the austenite to refine the grain size by successive recrystallization. Therefore, knowledge of the recrystallization stop temperature (RST) is important in the design of controlled rolling schedules, because it defines the temperature above and below which the deformation should be imparted in one and the other controlled rolling method respectively.

• OSTI ID: 247979
• Journal Information: Scripta Materialia, Journal Name: Scripta Materialia Journal Issue: 10 Vol. 34; ISSN 1359-6462; ISSN XZ503X
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
AUSTENITE
FERRITE
GRAIN SIZE
HOT WORKING
PRECIPITATION
RECRYSTALLIZATION
SOLUTES
STEELS
STRAIN RATE
TEMPERATURE DEPENDENCE
TIME DEPENDENCE
TORSION
VANADIUM ADDITIONS