摘要
设计了一种新型气体润滑结晶器,在结晶器与初凝壳之间形成一层均匀稳定的气膜。设计思想是减少甚至消除凝壳与结晶器之间的摩擦,减少表面划痕及表面裂纹;同时在气膜存在的情况下,结晶器的横向散热大大减少,热量主要有二次冷却水带走,形成近似单向散热的条件,引锭过程中液穴平直,缩短初凝壳长度,提高铸坯的内外品质。利用新型结晶器对6063铝合金进行了连铸试验,在气膜稳定情况下,连铸坯表面光洁,无冷隔,无皮下气孔和疏松。
A new kind of air film lubricating mould was designed in this study, and a thin layer air film was formed between the metal surface and the mold inside surface. The aim of the study is not only to reduce the friction between mold and original skull, the surface scratch and surface crack, but also to decrease the transverse heat transfer of the mold greatly under the circumstance of air film existing. The heat of the ingot is transferred mainly by the second cooling water. The liquid pot in the casting process is flatter than that of DC casting, and the length of original skull is also shorten, which contribute to the improved surface quality and internal quality of the ingot. The 6063 aluminum alloy prepared in this mold has smooth surface, and no cold shut, blow hole or porosity are found under the subsurface when the air film is stable and uniform.
出处
《铸造》
CAS
CSCD
北大核心
2008年第8期772-774,共3页
Foundry
基金
国家"973"资助项目(2005CB623707)
高等院校科技创新引智计划资助项目(B07015)
高等学校科技创新重大项目培育资金资助项目(704015)
关键词
气膜润滑
连铸
冷隔
表面质量
air film lubricating
continuous casting
cold shut
surface quality
