Title

METALLURGICAL ANALYSIS OF THE NORMALIZING ROLLING OF NIOBIUM MICROALLOYED STEELS

METALLURGICAL ANALYSIS OF THE NORMALIZING ROLLING OF NIOBIUM MICROALLOYED STEELS

Authorship

Gorni, Antonio Augusto; Silva, Marcos Roberto Soares da

Gorni, Antonio Augusto

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Silva, Marcos Roberto Soares da

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DOI

10.5151/2594-5297-24140

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Abstract

There some concerns about the use of Nb microalloyed steels in the normalizing rolling of plate steels, as this thermomechanical treatment ends under a temperature range where Nb(CN) precipitation can promote partial recrystallization of austenite. The aim of this work was to verify the effectiveness of Nb in retarding austenite recrystallization and to determine conditions under which Nb microalloyed steels can be processed through normalizing rolling fulfilling, as much as possible, the metallurgical recommendations proposed to this thermomechanical treatment, mainly the full austenite recrystallization between consecutive rolling passes.

There some concerns about the use of Nb microalloyed steels in the normalizing rolling of plate steels, as this thermomechanical treatment ends under a temperature range where Nb(CN) precipitation can promote partial recrystallization of austenite. The aim of this work was to verify the effectiveness of Nb in retarding austenite recrystallization and to determine conditions under which Nb microalloyed steels can be processed through normalizing rolling fulfilling, as much as possible, the metallurgical recommendations proposed to this thermomechanical treatment, mainly the full austenite recrystallization between consecutive rolling passes.

Keywords

Normalizing rolling; Nb microalloyed steel; Austenite recrystallization; Precipitation.

Normalizing rolling; Nb microalloyed steel; Austenite recrystallization; Precipitation.