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围绕不同的成分、变形温度和变形量同再结晶退火后的合金硬度之间的关系,通过偏光显微组织分析以及硬度测试对铝硅合金变形再结晶进行了研究。结果表明,铝硅合金在500℃进行0.5 h固溶处理后以较快的速度进行变形会使得退火后再结晶晶粒尺寸变大。硅含量较少的时候可以促进铝硅合金再结晶的发生,并使再结晶晶粒粗化,而当硅含量大于1%之后,随着硅含量的增加再结晶晶粒会显著减小。
The deformation and recrystallization of Al-Si alloy was studied by polarization microstructure analysis and hardness test, based on the relationship between different composition, deformation temperature and deformation and hardness of alloy after recrystallization annealing. The results show that the deformation of the Al-Si alloy at a faster rate after the solution treatment at 500 ℃ for 0.5 h will make the recrystallized grain size larger after annealing. When the content of silicon is less, the recrystallization of Al-Si alloy can be promoted and the recrystallization grains coarsen. When the content of silicon is more than 1%, the recrystallization grains decrease remarkably with the increase of silicon content.