预热惰性气体对铝熔体除气效果的影响  

Degassing effect of preheated inert gas on aluminum

作　　者：王连登[1,2] 朱定一[1] 陈永禄[3] 洪丽华[3] 魏喆良[2] 宋伟[2] 李秋菊[2] 

机构地区：[1]福州大学材料科学与工程学院,福建福州350108 [2]福州大学机械工程及自动化学院,福建福州350108 [3]福建工程学院材料科学与工程系,福建福州350108

出　　处：《轻合金加工技术》2010年第12期17-20,共4页Light Alloy Fabrication Technology

基　　金：福建省自然科学基金资助项目(2009J05119);福建省教育厅资助项目(JA09173);福建省科技计划项目(2010H0002)

摘　　要：为了充分发挥惰性气体对铝熔体的除气效果而又避免环境污染,提出预热惰性气体除气的新思路,设计简易预热装置,提高惰性气体气泡的入液温度。除气试验结果表明,在相同的熔炼条件下,预热惰性气体除气法可产生细小弥散的入液"热气泡",气泡不易长大且延长了气泡溢出液面的时间,当静置时间为20 min时,熔体含氢量可低至0.15 mL/(100 g Al),除气效果优于常规低温气体除气法的,是一种有效的环保型物理除气新工艺。In order to improve the degassing effect of the inert gas on aluminum alloy melt and avoid the environment pollution,a new kind of degassing way has been put forward.A simple inert gas preheating unit has been designed.Using the inert gas preheating unit can increase the inert gas bubbles＇ temperature in the aluminum melt.The degassing result shows that the preheated inert gas can produce tiny and dispersive thermal bubbles after blowing into the aluminum melt and the thermal bubbles do not grow up quickly.More over,the thermal bubbles rise out of the aluminum melt slowly,so the degassing time is elongated.The hydrogen content can be as low as 0.15 mL/100g Al after the aluminum melt being held for 20 min.The preheated inert gas gets better effects than that of the traditional degassing way.And it is an effective environmental protective degassing technology.

关 键 词：预热 惰性气体 铝熔体 除气 含氢量 

分 类 号：TG292[金属学及工艺—铸造]