对于大多数金属材料,其中包括铝合金,其特征是有称之为《临界》再结晶的过程。由于临界变形度不大的冷变形和随后的加热共同影响的结果,在产生临界再结晶过程的同时晶粒急剧长大。对各种铝合金而言,临界变形度是不一样的。例如,对于硬铝型合金(16、19、1)临界变形度为8～12％,对AK4—1合金则为2～5％。临界变形度小的变形引起麻烦很多,而 For most metallic materials, including aluminum alloys, this is characterized by a process called “critical” recrystallization. Due to the combination of cold deformation with little critical deformation and subsequent heating, the grains grow sharply at the same time as the critical recrystallization. For a variety of aluminum alloys, the critical deformation is not the same. For example, the critical deformity is 8-12% for hard aluminum alloys (16, 19, 1) and 2-5% for AK4-1 alloys. Deformation of a small critical deformation caused a lot of trouble, and