摘要
研究了对6082铝合金高温热压缩行为,发现热压缩过程后,变形样品的晶粒度随变形温度的升高而增大,随变形速率的增大而减小。通过对高温流变应力曲线的分析,建立了可以双曲正弦函数来描述的稳态流变应力模型,进而指导该合金的热挤压加工工艺的制定,并在挤压温度为480℃时成功挤压出外观和表面光洁度都较好的复杂断面型材。型材截面的平均维氏硬度为110.0(HV),抗拉强度为296.38MPa。
Hot deformation behavior of 6082 aluminum alloy is studied. After hot compressions, grain size in creases with deformation temperature increasing and decreases with strain rate increasing. The model for flow stress curves is built by analyzing the hot deformation features of 6082 aluminum alloy. It can be guidance for choosing the hot extrusion processing technique. Here, 480℃ is chosen as the extrusion temperature and hollow profile is success fully produced with good shape and sound surface. The mean HV value is 110. 0 from the cross section and the average tensile strength is 296.38MPa.
基金
力拓加拿大铝业公司(Alcan)资助
