【摘要】 采用不同速比的异步轧制技术对99.99%的高纯铝板进行不同形变量的冷轧,并对冷轧样品进行不同温度和时间的再结晶退火.利用X射线衍射技术和TEM观测探讨了异步轧制条件下高纯铝箔中变形织构和再结晶织构的演变.结果表明:高速比的异步轧制(i=1.28)在样品中产生相对较强的旋转立方织构{001}(110).异步轧制后退火的高纯铝箔样品中,立方{001}(100)织构组分的再结晶晶核的形成和长大存在一个临界转变温度,此温度与异步轧制的速比成反比.异步轧制有利于降低高纯铝箔的再结晶温度,这与异步轧制提高高纯铝箔的形变储能有关.异步轧制有利于在低温时形成强的立方{001}(100)织构组分,但此时漫散较大;随着退火温度的升高,漫散范围明显缩至8°-10°.更多还原

【Abstract】 Hot rolled high purity aluminum sheet (99.99%) was cold rolled by cross shear rolling with different roll mismatch speed ratios (i=1.06, 1.17, 1.28). The rolled specimens were heated or annealed at different temperatures for different times. Texture distribution and microstructures of specimens were studied by X-ray diffraction technique (ODF analysis) and TEM, respectively. The results showed that the strong rotated cube texture component {100}{011} formed and developed in the cross shear rolling specimen with high roll mismatch speed ratio (i-1.28). During annealing, there is a temperature threshold value for the formation and development of cube texture {001}(100), which is inversely proportional to speed ratio. The cross shear rolling accelerates the recrystallization processes, which is related to deformation stored energy. The easy formation and development of cube texture {001}(100} of high purity aluminum foils after cross shear rolling are analyzed based on theory of deformation and recrystallization.更多还原