微量元素对2A12铝合金型材组织及耐热性能的影响  

Effect of trace elements on microstructure and heat resistance of 2A12 Al-alloy profiles

作　　者：祁艳华[1] 王英君[1] 潘哲[1] 丛福官[1] 杨金刚[1] 曲劲松[1] 

机构地区：[1]东北轻合金有限责任公司,黑龙江哈尔滨150060

出　　处：《轻合金加工技术》2016年第7期59-63,共5页Light Alloy Fabrication Technology

摘　　要：采用常温和高温拉伸、扫描电镜、透射电镜等方法,研究了微量Zr、V和Ni元素对2A12铝合金型材组织和高温性能的影响。结果表明,微量Zr、V和Ni元素的添加可以使2A12铝合金增加含Zr和Ni等元素的硬质相,适量Zr、V和Ni元素可以改善2A12铝合金组织,提高其高温强度,在250℃条件下,其拉伸强度相比常规2A12铝合金的提高约18 N/mm^2。The effects of Zr, V and Ni on microstructure and high temperature performance of 2A12 Al-alloy profiles are investigated by the tensile test at normal and high temperatures, SEM and TEM. The results show that Zr, V and Ni trace elements produce hard phases con- taining Zr and Ni elements in 2A12 aluminum alloy. Moderate Zr, V and Ni elements can improve strength at high temperature and microstructure of 2A12 aluminum alloy. The tensile strength of 2A12 aluminum alloy at 250℃ is about 18N/mm2 higher than that of conventional 2Al2 aluminum alloy.

关 键 词：2A12铝合金 型材 微量元素 耐热性能 

分 类 号：TG146.21[一般工业技术—材料科学与工程]