It is shown that the addition of Be (0.023%)significantly increases the recrystallization temperature of the alloys,reduces the recrystallization speed and refines the grain size.

• 实验结果表明:加入0.；023%25Be能有效地提高7475铝合金的再结晶温度；降低再结晶速度；使合金的晶粒得到细化；且硬度值仍高于不含铍的合金;