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在d400 mm×500 mm水平式双辊铸轧机上,研究了采用多能场非对称铸轧方法制备1050铝合金板带的最合理工艺参数,并对比分析了多能场非对称铸轧对组织和性能的影响。结果表明:在铸轧区长度70 mm、前箱温度670°C、铸轧速度1.3 m/min、励磁电流10 A、中心频率(13±1)Hz、超声功率200 W、超声波频率(20±0.2)kHz的条件下,制备出具有最佳组织和性能的1050多能场非对称铸轧板带,铸轧板带的中心分凝面消失,晶粒尺寸减小约40%,且分布均匀,微观偏析明显减少,析出相均匀分布于晶界处,铸轧板带的抗拉强度、屈服强度、伸长率和显微硬度分别提高了22.6%、23.66%、38.75%和9.90%。
In the d400 mm × 500 mm horizontal twin-roll casting mill, the most reasonable technological parameters of 1050 aluminum alloy strip prepared by multi-energy field asymmetric casting and rolling method were studied. The effects of asymmetric casting and rolling on the microstructures And the impact of performance. The results show that with the casting length of 70 mm, the temperature of the front box at 670 ° C, the casting speed of 1.3 m / min, the exciting current of 10 A, the center frequency of 13 ± 1 Hz, the ultrasonic power of 200 W and the ultrasonic frequency of 20 ± 0.2) kHz, the 1050 multi-energy field asymmetric cast strip with the best microstructure and properties was prepared. The center of the casting strip disappeared and the grain size decreased by about 40% , The microsegregation decreased obviously and the precipitated phase was uniformly distributed at the grain boundary. The tensile strength, yield strength, elongation and microhardness of cast strip increased by 22.6%, 23.66%, 38.75% and 9.90% respectively.