本文对LF6铝合金的超塑性作了研究。试样经500℃保温30min空冷,拉伸温度为530℃,应变速率2.22×10~(-4/s)得到延伸率为392%,m值为0.56;在各种应变速率下,拉伸温度500℃、530℃,σ～ε关系呈S曲线的形状;在超塑变形的试样中清楚观察到晶界滑移、晶粒大范围的转动(最大转角达40°左右)、晶界移动、亚结构出现及亚结构相对基体作较大角度转动。 In this paper, the superplasticity of LF6 aluminum alloy has been studied. The samples were air-cooled at 500 ℃ for 30min, the stretching temperature was 530 ℃, the elongation rate was 392% at strain rate 2.22 × 10 ~ (-4 / s) and the m value was 0.56. Under various strain rates, 500 ℃, 530 ℃, σ ~ ε showed a S-shaped curve; in the superplastic deformation of the sample clearly observed grain boundary slip, a wide range of grain rotation (maximum angle of about 40 °), the grain boundary movement , The sub-structure appears and the sub-structure relative to the base for a larger angle of rotation.