Through the chemical composition,changing stress,improving melt pureness and strengthening grain refining advanced solving the crackles methods.

• 从控制化学成分、调整铸造应力、提高熔体纯净度、加强晶粒细化等方面入手,防止7475铝合金扁锭铸造时发生裂纹、疏松缺陷。