*3.3. The E*ff*ect of the Ultrasonic Bending Vibration on the Mechanical Properties of the 1060 Aluminum Alloy Cast Rolling Strips and Subsequent Cold Rolling Strips*

The test results of the mechanical properties of the 1060 aluminum alloy cast rolling strips under four treatment conditions are shown in Table 2. It can be seen that in terms of tensile strength, adding the 0.18 wt% Al-Ti-B to the ultrasonic cast rolling strip improves the tensile property by 2%, while the other three have no significant difference. In terms of yield strength, compared with the addition of the 0.18 wt% Al-Ti-B refiner to the conventional cast rolling strip, the addition of the 0.18 wt% Al-Ti-B refiner, 0.12 wt% Al-Ti-B refiner, and 0.09 wt% Al-Ti-B refiner to the ultrasonic cast rolling strip caused a decrease of 0.98%, 0.98%, and 1.83%, respectively. In terms of elongation, compared to adding the 0.18 wt% Al-Ti-B refiner to the conventional cast rolling strip, adding the 0.18 wt% Al-Ti-B refiner, 0.12 wt% Al-Ti-B refiner, and 0.09 wt% Al-Ti-B refiner to the ultrasonic cast rolling strip caused an improvement of 6.42%, 2.73%, and 2.71%, respectively. Similarly, percentage reduction of area also increased by 2%, 2.52% and 1.57%, respectively. In summary, under the action of the ultrasonic bending vibration, the mechanical properties of the cast rolling strips have been improved to a certain extent. When the addition amount of the Al-Ti-B refiner was 0.18 wt%, the mechanical properties of the cast rolling strip had the greatest improvement.

The mechanical properties of the 1060 aluminum alloy cast rolling strip after cold rolling under four treatment conditions are shown in Table 3. It can be seen that in terms of tensile strength, compared with the conventional cast rolling strip with added 0.18 wt% Al-Ti-B refiner after cold rolling, the addition of the 0.18 wt% Al-Ti-B refiner, 0.12 wt% Al-Ti-B refiner, and 0.09 wt% Al-Ti-B refiner to the ultrasonic cast rolling strip after cold rolling all caused an improvement of 6.36%, 5.76%, and 1.68%, respectively. In terms of elongation, compared with the addition of the 0.18 wt% Al-Ti-B refiner to the conventional cast rolling strip after cold rolling, the addition of 0.18 wt% Al-Ti-B refiner to the ultrasonic cast rolling strip after cold rolling caused an increase of 4.11%, but the addition of the 0.12 wt% Al-Ti-B refiner or 0.09 wt% Al-Ti-B refiner to the ultrasonic cast rolling strip after cold rolling caused a reduction of 8.9% and 4.79%, respectively. This shows that the effect of the ultrasonic bending vibration on the mechanical properties of the cast rolling strip has been extended after the cold rolling, which is beneficial to the further processing of the cold rolling strip.


**Table 2.** Mechanical properties of the 1060 aluminum alloy cast rolling strips with different treatments.

**Table 3.** Mechanical properties of subsequent cold rolling of the strips of the 1060 aluminum alloy cast rolling strip with different treatments.

