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对Cu-Ag合金在低温下进行大变形量轧制加工,研究其织构演化特征和力学性能,随后对轧制板材进行热处理,观察其退火行为。结果表明,与常温轧制板所表现的铜型织构不同,低温下轧制板材内的交滑移机制被抑制,而其主要织构特征为黄铜型织构,且板材的抗拉强度和屈服强度均有提高。退火后,低温轧制板内发生原位再结晶,其织构随机分布,而常温轧制板的退火织构主要为立方织构。利用金相和电子背散射衍射手段观察退火前后材料的微观组织,发现低温轧制时板材内动态回复过程被抑制,因而轧制后变形储能较高,退火时,与常温轧制板相比能在较低温度发生再结晶软化行为。
The Cu-Ag alloy was subjected to a large amount of deformation at a low temperature. The texture evolution and the mechanical properties of the Cu-Ag alloy were studied. The rolled sheet was then heat-treated to observe its annealing behavior. The results show that the mechanism of cross-slip in the rolled sheet is suppressed at low temperature, which is different from the copper texture exhibited by the rolled sheet at normal temperature. The main texture is brass texture, and the tensile strength And yield strength have increased. After annealing, the in-situ recrystallization occurs in the low temperature rolled sheet, the texture is randomly distributed, while the annealed texture of the rolled sheet at room temperature is mainly cubic texture. The microstructure of the material before and after annealing was observed by means of metallographic and electron backscatter diffraction. It was found that the dynamic recovery process was suppressed during the low temperature rolling, and the deformation energy storage after rolling was higher. Compared with the normal temperature rolling plate Recrystallization can soften at lower temperatures.