消失模铸造铝液充型速度研究  

Investigation on Liquid Aluminum Filling Velocity of LFC Process

作　　者：吴国华[1] 罗吉荣[1] 

机构地区：[1]华中理工大学

出　　处：《特种铸造及有色合金》2000年第1期26-28,共3页Special Casting & Nonferrous Alloys

摘　　要：研究了各工艺因素对消失模铸造铝液在型腔中平均流速的影响。结果表明，保温涂料及一定的涂层厚度有利于提高铝液的充型速度。浇注温度越高、直浇道空心面积率越大，铝液充型速度越快。模样厚度越大，铝液充型速度越慢。一定的直浇道长度及直浇道面积有利于提高铝液的充型速度。施加负压会使铝液的充型速度大大提高。Effects of various process variables on average flow velocity of LFC liquid aluminum in the mold have been studied. The results show that thermal insulation coating and suitable coating thickness are helpful to improving the filling velocity of liquid aluminum. The higher the pouring temperature or the larger the sprue hollow area rate is,the faster the filling velocity of molten aluminum is. The larger the thickness of pattern is,the slower the filling velocity is. It will be helpful to improving the filling velocity when the sprue length and sprue areas are controlled to some extent. Vacuum pressure will improve the filling velocity greatly.

关 键 词：铝合金 消失模铸造 充型速度 

分 类 号：TG249.9[金属学及工艺—铸造]