通过OM,TEM和SEM/EBSD研究了QBe1.7铜合金室温多向压缩变形及973 K退火后的微观组织及其取向演化规律.结果表明:室温变形时,其真应力-累积真应变(σ-∑ε)曲线因动态回复而呈类似稳态流变特征,随变形道次的增加组织内部产生了大量的亚晶,但均匀弥散分布的细小析出物的存在严重抑制了动态再结晶的进行,累积变形至Σε=4.8时仍未出现细晶；而在中等变形程度下(∑ε=2.4)通过退火处理可获得平均晶粒尺寸仅0.8 μm左右的超细晶组织.超细晶主要是由变形所产生的中低角度晶界迅速转变为包含大量孪晶界的高角晶界演化而成.根据晶粒尺寸变化可把退火过程分为回复、晶粒急剧细化和晶粒正常长大3个阶段.
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