(中南大学 机电工程学院 高性能复杂制造国家重点实验室，长沙 410083)
摘 要: 通过在铸轧区的关键部位引入电磁-超声能场，实现对3003铝合金的普通对称铸轧、非对称铸轧和非对称电磁-超声铸轧。用该方法分别制备了上述3种铸轧带坯，并将普通对称铸轧带坯与非对称电磁-超声铸轧带坯加工成厚度为0.25 mm的成品薄带。通过金相显微观察、扫描电镜观察和动静万能试验机测试分析了3种3003铝合金铸轧板的组织和性能。结果表明：与对称铸轧相比，非对称铸轧有效地抑制了宏观偏析，并使铸轧速度提高了33.3%；施加电磁-超声复合能场后，铸轧带坯晶粒显著细化，力学性能明显提高；电磁-超声成品薄带的抗拉强度、屈服强度和伸长率分别比普通成品薄带的提高了32.93%、38.91%和6.25%。
关键字: 3003铝合金；电磁超声复合能场；冷轧退火；力学性能；析出相
（State Key Laboratory of High Performance Complex Manufacturing,
School of Mechanical and Electrical Engineering, Central South University, Changsha 410083, China）
Abstract:Three kinds of plates (asymmetric and sunken aluminum plates, asymmetric and sunken plates under the electromagnetic-ultrasonic compound field and symmetric ones) were manufactured by introducing electromagnetic- ultrasonic field at the key parts of the roll-casting area. Then, asymmetric and sunken plates under the electromagnetic-ultrasonic compound field and symmetric ones were processed into 0.25 mm-thick end aluminum strip. The microstructures and properties were investigated by optical microscopy, scanning electron microscopy and static/dynamic universal testing machine. The results show that the speed of the asymmetric rolling is improved by 33.3% and the macro-segregation is diminished. By applying compound energy field, the grains are significantly refined and the mechanical properties are improved. Compared with those of the general roll-casting strips, the ultimate tensile strength, yield strength and elongation of compound energy field aluminum of roll-casting strips are improved by 32.93%, 38.91% and 6.25%, respectively.
Key words: 3003 aluminum alloy; electromagnetic-ultrasonic compound energy field; cold rolling annealing; mechanical properties; precipitate
