材料期刊网

本文对国产铝板在冷轧与退火后的极图以及冲盂与拉伸试验中所表现的各向导性进行了研究。试验结果指出,纯铝的冷轧织构确定为(110)[112]+(112)[111],该织构引起在冲盂试验中与轧向成45°方向处出现制耳。经500℃温度下退火后,较强的再结晶织构(100)[001]+(146)[211]与残留的加工缴构(110)[112]+(112)[111]同时并存,在冲盂时制耳由4个与轧向成45°的方向变为6个与靴向成30°,90°方向处出现。当退火温度达600℃时,再结晶织构(100)[001]则显著地增强,制可的数目又减为4个并在与轧向成0°,9°方向处出现。 纯铝经冷轧后的表面织构为(100)[011],该织构系经过一过渡层逐渐改变至中心部分的(110)[112]+(112)[111]织构。 在测定沿板面不同方向的拉伸性能中,发现经冲盂后制耳的位置一般与板料近似真应力,σ_R,最小的方向相符合。 对于纯铝退火后的(146)[211]织构的形成问题也进行了讨论。

The pole-figures, earing behavior and directional properties of cold-rolled andannealed commercial pure aluminum strips were investigated. It was found thatthe ideal orientations of cold-rolled texture can be best described as (110) [112] +(112) [111] which yielded ears of drawn cups at the position 45° from the roll-ing direction. The recrystallization texture of specimen annealed at 500℃ exhibit-ed a strong (100) [001] + (146) [211] texture superimposed on the retained de-formation texture (110) [112] + (112) [111] and the earing position in the drawncups changed from 4 ears at 45°to 6 ears at 30° and 90° from the rolling direc-tion. When annealing temperture was raised to 600℃, a rather strong cubic tex-ture, (100) [001], was developed and the earing position changed again from 6ears at 30° and 90° to 4 ears at 0° and 90° from the rolling direction. The surface texture of cold-rolled aluminum strips was found to be (100) [110]and a transition zone between the surface texture and the main texture was observed. The mechanical properties of cold-rolled and annealed aluminum strips atvarious angle to the rolling direction were determined. It was found that the earingposition in the drawn cups generally occured at the directions where the approx-imate true stress, σ_R, is minimum as observed in copper. A mechanism of the development of a principal texture, (146) [211], wasproposed.