【作者】 陈芳芳；

【导师】 武建军；

【作者基本信息】 河北工业大学 ， 材料学， 2007， 硕士

【摘要】 用于深冲制品的铝合金板材不仅要求具有较高的强度,较小的厚度,而且要求较低的制耳率和优良的深冲变形性能。多晶材料中的织构直接影响铝合金的制耳率和深冲性能。由于织构的存在带有普遍性,研究形变织构和再结晶织构及其所造成的材料的各向异性,对于材料的使用以及提高材料的性能有着极为重要的意义。本文分别用蚀坑法和取向分布函数法测定了铝合金板材的织构,系统研究了形变量、退火条件、Fe元素含量对再结晶织构和力学性能的影响规律。研究和分析表明,冷轧铝合金板材的形变织构主要由铜型织构、黄铜型织构和S织构组成;再结晶织构主要由高斯织构、R织构、立方织构和铜型织构组成。C织构、B织构和BR织构均有降低45°方向强度的作用,R/S织构和G织构则可以提高45°方向的强度。B织构和R/S织构有使横向强度高的作用,而C织构有使轧向强度高的作用。随退火温度的升高和退火时间的延长,强度和延伸率的各向异性减小。增加Fe含量可提高再结晶温度,延缓再结晶过程。退火前后力学性能的各向异性均表现为45°方向延伸率最大,横向强度最高,但退火后比退火前明显减小很多。随形变量增加,立方织构分量减小,而R/S织构较强,退火强度和延伸率的各向异性均增加。更多还原

【Abstract】 Aluminum alloy deep-drawing plates were used more and more these years. High strength, thin sheet and little earing were needed. Texture has effect on earing and deep-drawing property. The texture is widespread in materials, so recrystallization texture and anisotropic property are important for the mechanical property of materials.By means of the pit-etching and Orientation Distribution Function recrystallization texture was determined. The paper systematically researched the influence of formation, condition of annealing, content of Fe element on the recrystallization texture and mechanical property.By research and analysis, deformation texture of cold rolled aluminum alloy sheets consists of Copper, Brass and S texture; recrystallization texture consists of Goss, R, Cube and Copper texture. Copper, Bress and Brass R texture reduce the strength of 45°orientation. R/S and Goss texture enhance the strength of 45°orientation. Brass and R/S texture enhance the strength of 90°orientation. Copper texture enhances the strength of 0°orientation.The anisotropy of strength and elongation decreases, when the temperature and time of annealing increase. The content of Fe increases, and recrystallization temperature increases. The anisotropy of elongation of 45°orientation is maximal. The anisotropy of strength of 90°orientation is maximal. The anisotropy of strength and elongation decreases clearly after annealing. When deformation increases after annealing, Cube texture decreases and R/S texture is strong, so the anisotropy of strength and elongation increases.更多还原