Asymmetric rolling apparatus, asymmetric rolling method and rolled materials fabricated by using the same

摘要

Provided is an asymmetric rolling method including: entering a to-be-rolled material having a first surface and a second surface between a first roll and a second roll that has a greater diameter than that of the first roll and a rotary angular speed that is different from that of the first roll while the first surface and the second surface respectively contact the first roll and the second roll, followed by rolling, and entering the rolled to-be-rolled material between a third roll and a fourth roll that has a greater diameter than that of the third roll and a rotary angular speed that is different from that of the third roll while the first surface and the second surface respectively contact the fourth roll and the third roll, followed by rolling, wherein different shear stresses are applied to the first and second surfaces of the to-be-rolled material.

主权项

1. An asymmetric rolling method comprising:
entering a to-be-rolled material having a first surface and a second surface between a first roll and a second roll that has a greater diameter than that of the first roll and a rotary angular speed that is different from that of the first roll while the first surface and the second surface respectively contact the first roll and the second roll, followed by rolling, and entering the to-be-rolled material between a third roll and a fourth roll that has a greater diameter than that of the third roll and a rotary angular speed that is different from that of the third roll while the first surface and the second surface respectively contact the fourth roll and the third roll, followed by rolling, wherein different shear stresses are applied to the first and second surfaces of the to-be-rolled material,
wherein while rotary linear velocities of the first and second rolls are maintained to be identical to each other and rotary linear velocities of the third and fourth rolls are maintained to be identical to each other, the to-be-rolled material is rolled,wherein in the rolling the rolling material, an orientation of the crystal is arranged to improve formability by controlling texture of a rolled material, wherein in the rolling the rolling material, the basal plane slip system of the rolling material is tilted by a angle between more than 0 degree to less than 90 degree with respect to a rolling direction.