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采用Zeiss金相显微镜、XRD射线衍射仪研究了不同固溶处理条件对AZ31镁合金的组织及性能的影响。结果表明,AZ31合金的抗拉强度随着固溶时间的延长得到明显提高(由688K固溶处理6h的69.7MPa升至12h的86.6MPa);经过688K×12h固溶处理的AZ31合金组织中的β-Mg17Al12相逐渐溶解,最后完全溶入基体中;固溶时间的延长保证了再结晶过程的充分进行,688K固溶处理12h的合金组织晶界处产生了大量平均尺寸为10μm的细小再结晶晶粒。
The effects of different solution treatment conditions on the microstructure and properties of AZ31 magnesium alloy were investigated by Zeiss microscope and XRD. The results show that the tensile strength of AZ31 alloy increases with the increase of solution time (from 69.7MPa at 688K for 6h to 86.6MPa at 12h), and the AZ31 alloy after 688K × 12h solution treatment β-Mg17Al12 phase gradually dissolved, and finally completely dissolved in the matrix; prolong the solution time to ensure the full recrystallization process, 688K solution treatment 12h alloy grain boundaries produced a large number of average size of 10μm fine recrystallization Grain.