6082铝合金的淬火特性及微观组织
发布时间：2019-04-12 16:46
【摘要】：采用末端淬火和中断淬火方式,结合透射电镜(TEM),研究了6082铝合金的淬火特性及微观组织变化特征。结果表明:在末端淬火试验条件下,6082铝合金的淬透深度为15~20 mm;淬火敏感区间的平均冷却速率达20℃/s时,合金时效后形成细小弥散的β″相,无沉淀析出带(PFZ)窄小。在中断淬火的高温保温过程中,几乎没有β平衡相的析出,时效后获得了较高的硬度;在中温保温过程中,β平衡相因消耗周围的溶质原子而快速形成并长大,导致时效后合金性能大幅度下降;低温保温过程中,β平衡相形成缓慢,随时间增加,析出数量增多并长大,影响后续时效强化效果。合金在慢冷和保温过程中,析出的β平衡相大多是以富铁相颗粒作为不均匀形核的核心,这是造成合金淬火敏感性高的原因之一。
[Abstract]:The quenching characteristics and microstructure change characteristics of 6082 aluminum alloy were studied by means of terminal quenching and interrupt quenching combined with transmission electron microscopy (TEM),). The results show that when the average cooling rate of 6082 aluminum alloy is up to 20 鈩，
本文编号：2457195
[Abstract]:The quenching characteristics and microstructure change characteristics of 6082 aluminum alloy were studied by means of terminal quenching and interrupt quenching combined with transmission electron microscopy (TEM),). The results show that when the average cooling rate of 6082 aluminum alloy is up to 20 鈩，
本文编号：2457195
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