Interface formation between liquid and solid Mg alloys: An approach to continuously metallurgic joining of magnesium parts
Interface formation between liquid and solid Mg alloys: An approach to continuously metallurgic joining of magnesium parts
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DOI：
10.1016/j.msea.2009.11.066
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发表时间：
2010-04
期刊：
影响因子：
6.4
通讯作者：
K. Papis;J. F. Löffler;P. Uggowitzer
中科院分区：
文献类型：
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作者：
K. Papis;J. F. Löffler;P. Uggowitzer
在这个项目中，我们描述了一个过程中，镁熔体（纯镁或AJ 62）铸造到固体镁基板（AZ 31）。镁合金上的天然氧化物/氢氧化物层通常阻止通过铸造的冶金连接。因此，对AZ 31基材进行预处理，用Zn/MgZn 2涂层代替氧化物层。该过程包括组合的酸洗/氧化还原反应和镀锌/热处理过程，其显著改变基材的表面润湿性质。我们描绘的工艺参数，允许形成一个连续的焊接接头，这是免费的氧化物，微腔或其他缺陷，并讨论从金属物理的角度来看，界面的形成。以这种方式，表面改性创造了通过复合铸造连接锻造和铸造镁部件所必需的先决条件。
In this project we describe a process where a magnesium melt (pure Mg or AJ62) is cast onto a solid magnesium substrate (AZ31). The natural oxide/hydroxide layer on magnesium alloys usually prevents metallurgical joining via casting. Therefore, a pre-treatment was applied to the AZ31 substrate to replace the oxide layer with a Zn/MgZn2coating. This procedure comprises a combined pickling/redox-reaction and galvanization/heat-treatment procedure, which drastically changes the substrate's surface wetting properties. We depict the process parameters that allow for the formation of a continuous metallurgic joint, which is free of oxides, micro-cavities or other imperfections, and discuss the interface formation from a metal-physical view. In such a way the surface modification creates the preconditions that are necessary to join wrought and cast magnesium components by means of compound casting.