EFFECT OF HOT-ROLLING STRAIN-RATE IN THE FERRITE REGION ON THE RECRYSTALLIZATION TEXTURE OF EXTRA-LOW-C SHEET STEELS

被引:25
作者
MATSUOKA, S
SAKATA, K
SATOH, S
KATO, T
机构
[1] Iron and Steel Research Laboratories, Kawasaki Steel Corporation, Kawasaki-cho, Chuo-ku, Chiba, Chiba-ken
关键词
HOT ROLLING; EXTRA-LOW C STEEL; RECRYSTALLIZATION; TEXTURE FORMATION;
D O I
10.2355/isijinternational.34.77
中图分类号
TF [冶金工业];
学科分类号
0806 ;
摘要
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, which is similar to that of cold-rolled sheet steel, does not depend on the strain rate. The {222} residual strain in specimens rolled at a high strain-rate is signficantly 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 {11} 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 well as cold-rolling.
引用
收藏
页码:77 / 84
页数:8
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