極低炭素冷延鋼板の r 値の面内異方性に及ぼす冷延率と熱延板組織微細化の影響

概要

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In this paper, a textural analysis on the planer anisotropy of r-value was carried out using extra low carbon steel sheets cold rolled at 80% and 90% with a hot band grain size of 28μm and 54μm respectively. For a detailed analysis, a model for calculating r-values from ODF-data of texture was used and the influence of each or a group of crystal orientations of the recrystallization texture in question on the planer anisotropy of r-values was studied. The following results were obtained : A development of {111}<110>∿{443}<110>∿{332}<110>∿{221}<110> enhanced the V-type planer anisotropy of r-values. A decrease in the intensity of these orientations by increasing the cold rolling reduction or the refinement of the hot band microstructure reduced the r-values in L and c directions and hardly affected the r-value in D direction, and as a result, the V-type planer anisotropy of r-values was improved. On the other hand, an increase in the intensity of {111}, {334} orientation by increasing the cold rolling reduction or the refinement of the hot band microstructure raised r-values in sequence of L<D<C directions and contributed to reduce the V-type planer anisotropy of r-values as a whole.
社団法人日本鉄鋼協会の論文
1996-10-01