AZ31镁合金无熔剂熔炼与净化机理研究

项目名称： AZ31镁合金无熔剂熔炼与净化机理研究

项目编号： No.51274175

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 矿业工程

项目作者： 侯华

作者单位： 中北大学

项目金额： 82万元

中文摘要： AZ31镁合金是目前应用最广的变形镁合金，但由于传统的熔剂熔炼方法落后，污染环境，且产生的夹杂和气孔缺陷降低了合金品质，成为其在高端领域应用的瓶颈之一。因此，探索先进的无熔剂熔炼及净化技术，开发一种制备简单、价格便宜且保护效果理想的新型保护气体，对提高镁合金品质、环境保护都极其重要。本项目基于将C、F化合物在不同条件下的分解自由能与镁合金反应的自由能相比较，来确定其与镁合金反应生成物的稳定程度，从而选出能有效阻燃的气体化合物对镁合金熔炼进行保护，并通过对阻燃保护机理的实验及理论研究，来评价其保护效果及对环境的影响程度，以确定理想的保护气体；另外还拟对旋转喷吹及陶瓷过滤复合工艺机理、AZ31镁合金中氧化镁等夹杂的定量检测方法进行研究，为高品质镁合金生产提供理论支撑。

中文关键词： 气体保护；旋转喷吹；陶瓷过滤；定量检测；

英文摘要： AZ31 magnesium alloy was one of the most widely applied wrought magnesium alloy at present. However, the traditional flux smelting methods were backward and pollute the environment, the quality of alloy was reduced because of the inclusions and defects of air hole, which limit the application in high-end fields. Therefore, it was extremely important to explore advanced technology of no flux smelting and purification, to develop a new kind of cheap protective gas which was prepared simply and has perfect effect for improving the quality of magnesium alloy and environmental protection. The project based on comparing the resolution free energy of C、F compounds in different condition and reaction free energy with AZ31 magnesium alloy to confirm the stabilization degree of product and select effective fire retardant gas compound to protect magnesium alloy smelting. The protective effect and the degree of influence on environment were evaluated through the study on fire retardant protection mechanism experiment and theory to confirm the ideal protective gas. In addition, the recombination technology mechanism of rotating injection and ceramic filtering, the quantitative detection of impurities such as magnesium oxide in AZ31 magnesium alloy were studied to provide theoretical support for high-quality magnesium alloy p

英文关键词： Gas protection；Rotating injection；Ceramic filter；Quantitative detection；