Development of a {111} Recrystallization Texture Associated WithDynamic Strain Aging During Hot Rolling in the Ferrite Region

Abstract

Hot rolling in the ferrite region is applied in an extra-low C sheet steel without cold rolling by employing dynamic strain aging. When the amount of solute C is about 10 ppm before rolling, the r-value and 222 intensity ratio of sheet steel annealed after rolling are maxima at the rolling temperature of 773K, during which dynamic strain aging occurs. The {222} residual strain in the specimen rolled at 773K is higher than that in specimens rolled at other temperatures. It is proposed that dynamic strain aging would provide high stored energy in the 111 component of an as-rolled specimen, with the result that the region of high stored energy would recover and nucleate rapidly so that a strong 111 re, crystallization texture develops.

Recrystallization Behavior of IF Steel Sheets Immediately after Hot-rolling in Ferrite Region

“…[1][2][3][4][5][6][7][8][9][10][11][12] It has been found that cold-rolled sheet steels with extra-high r-values can be manufactured by hot rolling in the ferrite region with lubrication. [4][5][6][7] It is known that dynamic recovery easily occurs at higher temperatures during ferritic hot rolling, in which the steel has a bcc crystal structure. If the amount of dynamic recovery increases, the rolling texture can be expected to differ from that of cold-rolled sheets.…”