Optimization of the strain aging resistance in aluminum killed steels produced by continuous annealing

The influence of manganese, boron and carbon content and of the coiling temperature on the strain aging resistance of continuous annealed Al killed steels was investigated, using five different steel compositions and three coiling temperatures. The material was produced and processed in laboratory a...

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Bibliographic Details
Published in:Materials science & engineering. A, Structural materials : properties, microstructure and processing Structural materials : properties, microstructure and processing, 2003-08, Vol.354 (1), p.212-216
Main Authors: de Souza, Telmo Oliveira, Lopes Buono, Vicente Tadeu
Format: Article
Language:English
Subjects:
Al killed steels
AlN precipitation
Boron nitride
Carbide precipitation
Cold working, work hardening
annealing, post-deformation annealing, quenching, tempering recovery, and crystallization
Cold working, work hardening
annealing, quenching, tempering, recovery, and recrystallization
textures
Continuous annealing
Cross-disciplinary physics: materials science
rheology
Exact sciences and technology
Materials science
Physics
Strain aging
Treatment of materials and its effects on microstructure and properties
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Summary:The influence of manganese, boron and carbon content and of the coiling temperature on the strain aging resistance of continuous annealed Al killed steels was investigated, using five different steel compositions and three coiling temperatures. The material was produced and processed in laboratory and the continuous annealing cycle was performed using a thermomechanical simulation machine. In boron added steels, it was found that the coiling temperature has no influence on the strain aging resistance. On the other hand, in boron free steels of similar composition, coiling temperatures equal to or higher than 720 °C were required to reduce the amount of nitrogen in solid solution at room temperature after the overaging treatment and thus to increase the aging resistance. However, an increase in the Mn content of the boron free steels produced the same results observed in boron added steels. This effect is discussed in terms of the influence of the Mn content on the kinetics of AlN precipitation in these steels.
ISSN:0921-5093
1873-4936
DOI:10.1016/S0921-5093(03)00010-8