(中南大學(xué) 機(jī)電工程學(xué)院 高性能復(fù)雜制造國(guó)家重點(diǎn)實(shí)驗(yàn)室，長(zhǎng)沙 410083)
摘 要: 通過(guò)在鑄軋區(qū)的關(guān)鍵部位引入電磁-超聲能場(chǎng)，實(shí)現(xiàn)對(duì)3003鋁合金的普通對(duì)稱鑄軋、非對(duì)稱鑄軋和非對(duì)稱電磁-超聲鑄軋。用該方法分別制備了上述3種鑄軋帶坯，并將普通對(duì)稱鑄軋帶坯與非對(duì)稱電磁-超聲鑄軋帶坯加工成厚度為0.25 mm的成品薄帶。通過(guò)金相顯微觀察、掃描電鏡觀察和動(dòng)靜萬(wàn)能試驗(yàn)機(jī)測(cè)試分析了3種3003鋁合金鑄軋板的組織和性能。結(jié)果表明：與對(duì)稱鑄軋相比，非對(duì)稱鑄軋有效地抑制了宏觀偏析，并使鑄軋速度提高了33.3%；施加電磁-超聲復(fù)合能場(chǎng)后，鑄軋帶坯晶粒顯著細(xì)化，力學(xué)性能明顯提高；電磁-超聲成品薄帶的抗拉強(qiáng)度、屈服強(qiáng)度和伸長(zhǎng)率分別比普通成品薄帶的提高了32.93%、38.91%和6.25%。
關(guān)鍵字: 3003鋁合金；電磁超聲復(fù)合能場(chǎng)；冷軋退火；力學(xué)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
