镓对Al-Mg-Si合金微观组织及拉伸性能的影响研究  

Effect of Gallium Addition on the Microstructure and Tensile Properties of Al-Mg-Si Alloy

作　　者：林金平[1] 张军[2] 祝国梁[1] 王俊[1] 郭有军[2] 赵洪生[2] 孙宝德[1] 

机构地区：[1]上海交通大学金属基复合材料国家重点实验室,上海200240 [2]包头铝业有限公司,内蒙古包头014040

出　　处：《材料工程》2009年第S1期236-240,共5页Journal of Materials Engineering

摘　　要：通过对不同镓含量的6063合金进行对比实验,研究了微量元素镓对6063合金微观组织和力学性能的影响。研究表明,添加少量的镓,对6063合金的组织没有影响,不能细化6063合金的晶粒。对未经T6热处理的6063合金,镓含量对抗拉强度性能影响不大,但能提高其高温延伸率。对T6处理过的6063合金,在温度低于573K时,随着镓含量的增加,材料的抗拉强度和塑性都有明显的提高,但当温度高于673K,随着镓含量的增加,合金抗拉强度下降,延伸率增加,其中573K时延伸率增加达到105%。The effect of small amount gallium(up to 0.06%) on the microstructure,tensile property of Al-Mg-Si alloy was investigated by optical microscopy,tensile test and observation of fracture surface by scanning electron microscopy.The addition of gallium to 6063 alloy has little effect on the microstructure in the range of compositions investigated(up to 0.06%Ga).The tensile strength of 6063 alloy sheet increased and the elongation decreased as the gallium content increased.While the tensile strength and ductility of 6063 alloy with T6 heat treatment increased when the temperature below 573K,the tensile strength increased and the elongation decreased when the temperature above 573K as the gallium content increased.Furthermore,the elongation increased 105 at 573K when the gallium content added from 0.02% to 0.06%.

关 键 词：AL-MG-SI合金 镓 微观组织 拉伸性能 

分 类 号：TG131[一般工业技术—材料科学与工程]