摘要
采用光学显微镜(OM)、扫描电镜(SEM)及拉伸试验机等设备研究了不同均匀化温度对不同名义厚度铸轧3003合金晶粒度、金相组织及力学性能的影响。结果表明:均匀化温度越高,内部晶粒组织越粗大,第二相尺寸也增大;相同均匀化处理时,厚度越薄,机械加工率越大,内部晶粒组织越粗大;均匀化前铸轧态合金的晶界物质体积粗大且元素集中明显,组织中存在Al6Mn、AlMnFe、AlMnTi等块状和点状第二相;均匀化后大颗粒枝晶减小且非平衡相溶解,第二相数量相对明显增多,过饱和固溶体析出点状和不连续的条状AlMnFeSi等相;均匀化处理温度越高,相同厚度试样的抗拉强度则越低,经580℃均匀化后,不同名义厚度的抗拉强度大小顺序为:Rm(8.0)>Rm(4.0)>Rm(6.0)。
The effects of different homogenization temperature on the grain size,microstructure and mechanical properties of 3003 alloy with different nominal thickness were studied by optical microscope(OM),scanning electron microscope(SEM)and tensile testing machine and so on.The results show that the higher the homogenization temperature is,the larger the internal grain structure is and the size of the second phase increases.Under the same homogenization treatment,the thinner the thickness is,the larger the machining rate is,and the thicker the internal grain structure is.Before the homogenization,the grain boundary material of the alloy was large in volume and the element concentration was obvious.There were massive and point second phases in the microstructure,such as Al6 Mn,(AlMnFe),(AlMnTi).After homogenization,the dendrites of large particles decreased and the non-equilibrium phase was dissolved,the number of the second phase increased significantly,and the AlMnFeSi phase was precipitated out of the supersaturated phase.The higher the homogenization temperature is,the lower the tensile strength of samples of the same thickness is.After the homogenization at 580℃,the tensile strength of samples with different nominal thicknesses is Rm(8.0)>Rm(4.0)>Rm(6.0).
作者
赵斌斌
赵茂密
姜小龙
冯恩浪
李睿
ZHAO Bin-bin;ZHAO Mao-mi;JIANG Xiao-long;FENG En-lang;LI Rui(Geely Baikuang Group Co.,LTD.,Baise 533000,China)
出处
《铝加工》
CAS
2020年第4期7-10,共4页
Aluminium Fabrication
基金
百色市科学研究与技术开发计划项目(百科20183002)
广西重点研发计划(桂科AB19185007)。
关键词
均匀化
铸轧3003合金
晶粒度
第二相
力学性能
homogenization
cast&rolled 3003 alloy
grain size
second phase
mechanical property
