【摘要】 铝硅合金分别进行30%和70%的冷压缩变形，选取360℃、380℃、400℃、420℃及440℃对压缩试样进行退火处理，采用金相和硬度分析对材料微观组织及性能进行表征。结果表明：30%冷变形后基体组织与铸态组织保持一致，随着退火温度的升高，材料硬度呈缓慢下降趋势；70%冷变形后基体组织发生变化，随着退火温度的升高，材料硬度显著下降，共晶硅形态由板条状转变为颗粒状；退火温度高于380℃，70%冷变形试样发生再结晶。更多还原

【Abstract】 The Al-Si alloy is subjected to 30% and 70% cold deformation compression respectively. 360 ℃, 380 ℃, 400 ℃,420 ℃and 440 ℃ are selected to anneal the deformation samples. The microstructure and properties of the material are characterized by metallographic and hardness analysis methods. The results show that the matrix structure is consistent with the as-cast structure after 30% cold deformation. As the annealing temperature increases, the hardness of the material decreases slowly. After 70% cold deformation, the matrix structure changes. The increase of annealing temperature leads to a significant decrease in the hardness of the material, and the morphology of eutectic silicon changes from lath to granular. When the annealing temperature is higher than 380 ℃, recrystallization occurs in 70% cold deformed samples.更多还原