气膜对铝合金半连铸液穴形状及表面质量的影响  

Effect of Air Film on Sump Shape and Ingot Surface Quality of Al-Alloy During Semi-continuous Casting

作　　者：屈福[1] 王向杰[1] 朱庆丰[1] 崔建忠[1] 

机构地区：[1]东北大学材料电磁过程研究教育部重点实验室,辽宁沈阳110004

出　　处：《东北大学学报（自然科学版）》2008年第9期1291-1293,1302,共4页Journal of Northeastern University(Natural Science)

基　　金：国家重点基础研究发展规划项目(2005CB623707)

摘　　要：利用气膜连铸技术对6063铝合金熔体液穴形状、熔体与结晶器接触高度、初凝壳形成位置点以及液穴深度进行了研究.结果表明:与热顶铸造相比,气膜铸造降低了结晶器的有效散热长度,增加了熔体金属与结晶器接触高度,初凝壳形成位置点降低,液穴平直.初凝壳高度降低,减少了由铸锭的回热现象,偏析瘤和冷隔消除,铸锭表面质量明显提高.Investigates the sump shape,contact level between melt and mould,forming position of initial solidified shell and depth of sump of 6063 Al-alloy during the semi-continuous casting with air film used.The results showed that in comparison to hot top casting the application of air film to the casting process can lower the useful heat sink intensity of the mould and heighten the contact level between melt and mould,at the same time the forming position of initial solidified shell lowered and relatively flat sump shape.The lowered position of initial shell results in reducing the backheating of ingot and eliminating the segregation and cold shuts,the surface quality was greatly improved.

关 键 词：气膜连铸 铝合金 液穴形状 表面质量 

分 类 号：TG292[金属学及工艺—铸造]