铝熔体除氢过程动力学  

Kinetics of degassing hydrogen in aluminum melt

作　　者：张忠华[1] 边秀房[1] 刘相法[1] 

机构地区：[1]山东工业大学材料科学与工程学院,济南250061

出　　处：《中国有色金属学报》2000年第2期217-220,共4页The Chinese Journal of Nonferrous Metals

摘　　要：研究了铝熔体除氢时的除气和再吸气过程。实验结果表明 :铝合金熔体除氢后 ,静置一定时间才能达到最佳除氢效果 ,静置时间和熔体表面状态有关 :除氢后立即扒去表面浮渣 ,静置 5～ 6min为最佳 ;带渣静置 ,一般为 1 0～ 1 2min。在此基础上 ,建立了铝熔体中氢的动力学模型 。The courses of degassing and regassing of degassing hydrogen in aluminum melt were studied. The experimental results show that holding is necessary after the melt is treated and there exists the best holding time which is related to the surface conditions of the melt. If inclusions are eliminated immediately from the melt surface, the melt needs to be held about 5～6 min; if the melt is held with inclusions in the melt surface, the best holding time is about 10～12 min. Based on the results, the mathematical modeling of degassing in aluminum melt has been established and the mechanism of degassing and regassing has been analyzed.

关 键 词：铝熔体 除氢 动力学 铝合金 铸件 

分 类 号：TG292[金属学及工艺—铸造]