Cr含量对5083高镁铝合金组织和性能的影响  

Effect of Cr content on microstructure and properties of 5083 aluminum alloy with high magnesium

作　　者：王华春[1] 韦孙飞 何建贤[1] 赵启忠[1] 朱希一 杨鸿驰 WANG Hua-chun;WEI Sun-fei;HE Jian-xian;ZHAO Qi-zhong;ZHU Xi-yi;YANG Hong-chi(Alnan Aluminum Co.,Ltd.,Nanning 530031,China)

机构地区：[1]广西南南铝加工有限公司,广西南宁530031

出　　处：《轻合金加工技术》2020年第3期17-21,共5页Light Alloy Fabrication Technology

基　　金：广西创新驱动发展专项(桂科AA17204012,桂科AA17202007)。

摘　　要：研究了添加w(Cr)=0.06%-0.24%对5083铝合金铸锭均匀化组织、冷变形组织、拉伸性能、断口形貌的影响。结果表明:随着Cr含量的增加,5083铝合金强度提高,塑性降低,相应的拉伸试样断口形貌由韧性断裂到出现局部脆性断裂。当添加w(Cr)=0.19%时,5083铝合金中出现粗大的Al-Mn-Cr-Ti-V金属间化合物相,粗大的化合物相在轧制过程中破碎,沿轧制方向分布,恶化合金的塑性和成形性能。The effects of w(Cr)=0.06%-0.24%added on the homogenization structure,cold deformation structure,tensile properties and fracture morphology of 5083 aluminum alloy were researched.The results show that with the increase of Cr content,the strength of 5083 aluminum alloy increases,the plasticity decreases,and the fracture morphology of coldrolled tensile specimens changes from ductile fracture to local brittle fracture?When w(Cr)=0.09%,a coarse Al-Mn-Cr-Ti-V intermetallic compound phase appears in 5083 aluminum alloy.The coarse compound phase is broken during the rolling process and distributed along the rolling direction,which deteriorates the plasticity and formability of the alloy.

关 键 词：5083铝合金 显微组织 第二相 拉伸性能 断口分析 CR含量 

分 类 号：TG146.21[一般工业技术—材料科学与工程]