6061和6066铝合金时效与冷变形的组织与性能研究

Research on Microstructure and Properties of 6061 and 6066 Aluminum Alloy after Aging and Cold Deformation

对6061和6066铝合金进行了时效与冷变形处理。并使用扫描电子显微镜(SEM)、透射电子显微镜(TEM)、X射线衍射仪、能谱分析仪(EDS)、洛氏硬度仪对其显微组织、化学成分、硬度、拉伸强度等进行了研究。结果表明:在T6处理状态下,由于6066合金元素含量较高,会产生较多的分布均匀的固溶强化相β相,其抗拉强度、硬度等力学性能优于6061铝合金。变形处理对硬度影响不大,当锻造变形量为15%时,晶粒较为粗大,且保留原有的挤压方向性,抗拉强度降到最低;当变形量达到45%时,两种型号铝合金的挤压方向性几乎完全消除并为等轴晶。

The aging and cold deformation treatment of 6061 and 6066 aluminum alloy were carried out The microstmcture, chemical composition, hardness and tensile strength were studied by using scanning electron microscopy （SEM）, transmission electron microscopy （I＇EM）, X-ray diffraction and spectrum analyzer （EDS）, Rockwell hardness tester. The results show tha~ under the state ofT6 treatment, due to the high content of 6066 alloy elements, it will produce more uniform distribution of solid solution strengthening phase ~ phase, its tensile strength, hardness and other mechanical properties is better than those of 6061 aluminum alloy. Deformation treatment has little effect on hardness, when the forging deformation is 15%, grains are coarse and retain the original extrusion direction, and tensile strength drops to the lowest; when the deformation amount is 45%, the extrusion directivity of two types of aluminum alloy almost completely eliminate, which is equiaxed grain.