ISIJ International
Online ISSN : 1347-5460
Print ISSN : 0915-1559
ISSN-L : 0915-1559
Effect of Hot-rolling Strain Rate in the Ferrite Region on the Recrystallization Texture of Extra-low C Sheet Steels
Saiji MatsuokaKei SakataSusumu SatohToshiyuki Kato
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1994 Volume 34 Issue 1 Pages 77-84

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Abstract

High strain-rate rolling in the ferrite region has been adopted to develop the {111} recrystallization texture in extra-low C steel without cold-rolling. The intensity of the {222} component in the recrystallized sheet steel can be increased by increasing the rolling strain rate. Conversely, the texture of hot-rolled sheet steel, does not depend on the strain rate. The {222} redidual strain in specimens rolled at a high strain-rate is significantly higher than that in the low strain-rate specimens, while the {211}, {200} and {110} residual strains are independent of the strain rate. High strain-rate rolling can lead to more rapid recovery of {222} residual strain during annealing. As a result, it is considered that high strain-rate rolling in the ferrite region provides high stored energy preferentially in the {111} component, with the result that the region of high stored energy in the {111} component recovers and nucleates swiftly and a strong {111} recrystallization texture is developed. Moreover, high strain-rate rolling of high-purity iron makes it possible to recrystallize the material quickly and obtain the high r-value associated with a {111} recrystallization texture without annealing as cold-rolling.

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© The Iron and Steel Institute of Japan
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