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
赖爱玲 1林师朋 2马科 2贵星卉 2高崇 3薛韶钦 1刘威1
作者信息
- 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
- 折叠
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a-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 m3/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 m3/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 m3/h,铸造速度为55 mm/min对工业生产最有利.
Abstract
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 acicular β-Al(Fe,Mn,Si)phase and intermittent or spherical α-Al(Fe,Mn,Si)phase.The flaky or acicular β-Al(Fe,Mn,Si)phases are more refined first and less re-fined thereafter as cooling water increases.When the cooling water volume and casting speed are 162 m3/h and 55 mm/min,respectively,the second phase size of the ingot is the smal-lest 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 m3/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 in-dustrial production setting cooling water volume and casting speed at 162 m3/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Key words
Al-1.3Fe-0.2Si alloy semi-continuous casting process/Al-Fe second phase/microstructure/stripe defects引用本文复制引用
出版年
2024
NETL
NSTL
万方数据