铝是一种优良的导电材料,但由于强度低,其应用受到很大限制.随着铝在电力工业中应用逐渐增加,近年来,越来越多的工作致力于提高铝的导电率与强度的综合性能.通过改变传统T6时效工艺顺序发明一种同时显著提高Al-Mg-Si-Cu合金导电率和强度的形变时效工艺.本文采用显微硬度测量,导电率测试以及透射电镜(TEM)微观结构表征研究了形变时效工艺与传统T6时效工艺制备的材料在综合性能和微观组织上的差异.轧制变形引入的位错在后续时效过程调控析出,析出相形貌的改变是导电率相对T6工艺提高的原因,而残留位错可提高材料强度.
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