中南大学学报（自然科学版）2012，Vol.43Issue(3)：911-917,7.
均匀化处理温度对6082铝合金组织和性能的影响
Effect of homogenization treatment temperatures on microstructure and properties of 6082 aluminum alloys
摘要
Abstract
The effect of homogenization treatment temperature on microstructure and properties of 6082 aluminum alloys were investigated by using hardness and electrical conductivity measurement, optical microscope (OM), X-ray diffraction (XRD), scanning electronic microscope (SEM), energy dispersive spectrum (EDS) and transmission electron microscopy (TEM). The results show that the as-cast alloy consists of supersaturated solid solution and unequilibrium eutectic phases. Supersaturated solid solution changes into equilibrium Mg2Si phase at 490-510 ℃; equilibrium phases are dissolved into matrix when the homogenization temperature is higher than 510 ℃; Mg2Si phase and Si phase dissolved into matrix completely at 560 ℃. With the increase of annealing temperature, the eutectic morphology of precipitates disappears gradually, acicular β-AlMnFeSi phase transforms to spherical α-Al(MnFe)Si phase and the ratio of n(Mn+Fe)/n(Si) in AlMnFeSi phase increases. The precipitates is changed into spherical α-Al(MnFe)Si phase after annealing at 560 ℃ for 6 h. During homogenization, dispersive α-Al(MnFe)Si particles deposit in the alloy. The hardness increases and conductivity decreases with the increase of annealing temperature.关键词
6082铝合金/温度/显微组织/球化/弥散相Key words
6082 aluminum alloy/ temperature/ microstructures/ spheroidization/ dispersoid分类
矿业与冶金引用本文复制引用
黄继武,孙瑜,赵毅,颜丝,黄志其..均匀化处理温度对6082铝合金组织和性能的影响[J].中南大学学报（自然科学版）,2012,43(3):911-917,7.基金项目
广东省教育部产学研结合项目(2009A080205001) （2009A080205001）
