工艺参数和型芯对AZ91D镁合金压铸充型能力的影响  

Influence of Die Casting Parameters and Core on Mold-Filling Capacity of AZ91D Magnesium Alloy

作　　者：刘艳改[1] 刘文辉[1] 熊守美[1] 柳百成[1] 

机构地区：[1]清华大学机械工程系,北京100084

出　　处：《铸造》2004年第11期883-886,共4页Foundry

基　　金：教育部博士后专项基金资助项目;"清华-东洋镁铝合金成形技术研究开发中心"研究开发项目(01202066);国家自然科学基金项目(50 2 7 50 81 )

摘　　要：通过正交实验,系统研究了压铸过程中浇注温度、模具温度、压射比压、充型速度对AZ91D镁合金充型能力的影响,同时研究了圆柱形型芯对其流动性能的影响。结果表明,对AZ91D镁合金压铸充型能力影响最大的因素是压射比压,其次是充型速度和浇注温度,影响最小的是模具温度。随着上述4个因素值的提高,AZ91D镁合金的充型能力均得到提高。随着型芯直径的增加,AZ91D镁合金的流动性能变差。应设法改善压铸工艺条件和型芯形状来提高合金的压铸充型能力。An orthogonal experiment was used to evaluate the influence of die casting parameters such as pouring temperature, die temperature, injection specific pressure and die filling speed on mold-filling capacity of AZ91D magnesium alloy. Also, the effect of a columned core on mold-filling capacity of the alloy was studied. The results show that the factors influencing on mold-filling capacity of AZ91D from the greatest to the smallest are injection specific pressure, die filling speed, pouring temperature and die temperature. The mold-filling capacity of AZ91D increases with the increase of all the above four factors and decreases with the increase of the core diameter. It is better to improve die casting process and core shape to increase the mold-filling capacity of the alloy.

关 键 词：AZ91D镁合金 压铸 工艺参数 型芯 充型 

分 类 号：TG249[金属学及工艺—铸造]