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研究了超声波对双辊铸轧的Mg-3%Al-1%Zn-0.8%Ce-0.3%Mn(质量分数)合金板带材组织和性能的影响。结果表明:超声波辅助镁合金的铸轧可以提高镁合金带材的强度、延伸率和极限深拉比值,在250℃镁合金带材的极限深拉比值可以达到2.16。这些镁合金力学性能和成形能力的提升是由于超声波铸轧过程中,超声波可以细化镁基体的晶粒尺寸,并同时对合金中的Mg_(17)(Al,Zn)_(12)和AlCeMn相起到变质作用。当超声波强度达到800 W时,镁基体的晶粒尺寸可以从150μm细化到30μm,而且针状的AlCeMn相可以被变质成球状,从而提高了镁合金的力学性能和成形能力。
The effects of ultrasonic wave on the microstructure and properties of Mg-3% Al-1% Zn-0.8% Ce-0.3% Mn (mass fraction) The results show that the strength - elongation and ultimate deep drawing ratio of magnesium alloy strip can be improved by ultrasonic casting of magnesium alloy. The ultimate deep drawing ratio of magnesium alloy strip at 250 ℃ can reach 2.16. The improvement of mechanical properties and forming ability of these magnesium alloys is due to the fact that ultrasonic can refine the grain size of Mg matrix during ultrasonic roll casting and simultaneously improve the microstructure and mechanical properties of Mg17 (Al, Zn) _ (12) and AlCeMn Metamorphosis. When the ultrasonic intensity reaches 800 W, the grain size of the magnesium matrix can be refined from 150 μm to 30 μm, and the acicular AlCeMn phase can be transformed into a spherical shape, thereby improving the mechanical properties and forming ability of the magnesium alloy.