半连续铸造工艺对Al-1.3Fe-0.2Si合金扁锭组织的影响  

Effect of semi-continuous casting process on the structure of Al-1.3Fe-0.2Si aluminum alloy flat ingot

作　　者：赖爱玲 林师朋 马科 贵星卉 高崇 薛韶钦 刘威 LAI Ailing;LIN Shipeng;MA Ke;GUI Xinghui;GAO Chong;XUE Shaoqin;LIUWei(Chinalco Henan Luoyang Aluminum Fabrication Co.,Ltd.,Luoyang 471832,China;Chinalco Materials Application Research Institute Co.,Ltd.,Suzhou Branch,Suzhou 215026,China;Chinalco Materials Application Research Institute Co.,Ltd.,Beijing 102209,China)

机构地区：[1]中铝河南洛阳铝加工有限公司,河南洛阳471832 [2]中铝材料应用研究院有限公司苏州分公司,江苏苏州215026 [3]中铝材料应用研究院有限公司,北京102209

出　　处：《轻合金加工技术》2024年第6期41-47,共7页Light Alloy Fabrication Technology

摘　　要：采用低液位半连续铸造工艺制备Al-1.3Fe-0.2Si合金扁锭,研究了铸造工艺对镜面铝用Al-1.3Fe-0.2Si合金铸锭组织的影响。结果表明,Al-1.3Fe-0.2Si合金扁锭中的第二相以片状或针状的β-Al(Fe,Mn,Si)相、断续或球状α-Al(Fe,Mn,Si)相为主,增大铸造冷却水量后对片状或针状的β-Al(Fe,Mn,Si)相的破碎细化效果先增加后降低。当冷却水量为162 m^(3)/h、铸造速度为55 mm/min时铸锭第二相尺寸最细小,成品板材表面光亮无底纹;晶粒尺寸的细化效果随冷却水量的增加先增加后降低。当冷却水量为150 m^(3)/h、铸造速度为50 mm/min时细化晶粒效果最好,但成品板材表面呈现底纹缺陷;考虑第二相对轧制镜面铝板材的影响更大,且轧制过程对铸锭晶粒有破碎作用,采用冷却水量为162 m^(3)/h,铸造速度为55 mm/min对工业生产最有利。Al-1.3Fe-0.2Si aluminum alloy flat ingots have been prepared with the LHC Semi-continuous casting process and the microstructure of the ingots for mirror aluminum have been studied with different parameters.The results indicate that the second phases are mainly flaky or acicularβ-Al(Fe,Mn,Si)phase and intermittent or sphericalα-Al(Fe,Mn,Si)phase.The flaky or acicularβ-Al(Fe,Mn,Si)phases are more refined first and less refined thereafter as cooling water increases.When the cooling water volume and casting speed are 162 m^(3)/h and 55 mm/min,respectively,the second phase size of the ingot is the smallest and the surface of the finished sheet is bright without any patterns.The refining effect on grain size increases first and then decreases with the increase of cooling water volume.The best grain refinement effect is achieved when the cooling water volume is 150 m^(3)/h and casting speed is 50 mm/min,but the surface of the finished sheet shows stripe defects.Considering that the second phase has a greater impact on rolling mirror aluminum sheets and that the rolling process has a crushing effect on the ingot grains,it is most beneficial to industrial production setting cooling water volume and casting speed at 162 m^(3)/h and 55 mm/min respectively.

关 键 词：Al-1.3Fe-0.2Si合金 半连续铸造工艺 Al-Fe第二相 微观组织 条纹缺陷 

分 类 号：TG292[金属学及工艺—铸造]