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对Al-Mg-Si合金的研究表明,在固溶淬火后低温时效,沉淀物析出的顺序是G·P区—β″—β′—β。β″相为单斜结构且有大量空位。β′相与Al基半共格,为面心立方或立方结构。稳定的β相Mg_2Si为面心立方结构。文献[6]用硬度和透射电镜方法证实,稀土对Al-Mg-Si合金G·P。区临界温度有影响。对成分为0.69%Mg,0.63%Si和0.11%RE的Al-Mg-Si合金,直接固溶淬火时效和二次时效的方法均观察到硬度Hv有突变。电镜观察表明固溶淬火在230℃以下时效,析出相为
The study of Al-Mg-Si alloy shows that the order of precipitation of precipitates is G · P -β “-β’-β.β” phase is monoclinic and has a large number of vacancies in low temperature aging solution-quenching. The β ’phase is semi-coherent with the Al group and is a face-centered cubic or cubic structure. The stable β-phase Mg_2Si is a face-centered cubic structure. Literature [6] confirmed by hardness and transmission electron microscopy, rare earth Al-Mg-Si alloy G · P. District critical temperature has an impact. For the Al-Mg-Si alloy with 0.69% Mg, 0.63% Si and 0.11% RE, the hardness Hv was observed to be abruptly changed by direct solution quenching and secondary aging. Electron microscopy showed that solution quenching at aging below 230 ℃, precipitation phase