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Influence of niobium and coiling temperature on themechanical properties of a cold rolled dual phase steel

Published online by Cambridge University Press:  18 April 2007

Y. Granbom
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Abstract

A cold rolled DP-grade (TS 600 MPa), coiled at 550°C, was comparedwith a steel of approximately the same analysis but with theaddition of 0.015 wt% Nb, coiled at 520 and 600°C respectively. TheNb-addition refines the ferrite grain size substantially and a moreuniform grain shape is achieved. The smaller grain size of the ferriteand martensite phases, results in a material with better formability.Recrystallization and phase transformations were studied with thelaser ultrasonic technique. This technique could be implemented onindustrial annealing lines.

Type
Research Article
Information
Metallurgical Research & Technology , Volume 104 , Issue 4: CokerieFour électriqueLaminageUtilisation de l'acier , April 2007 , pp. 191 - 197
Copyright
© La Revue de Métallurgie, 2007

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