Experimental Investigations on the Influence of the Thermal Conditions During Composite Casting on the Microstructure of Cu–Al Bilayer Compounds
Experimental Investigations on the Influence of the Thermal Conditions During Composite Casting on the Microstructure of Cu–Al Bilayer Compounds
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DOI：
10.1007/s40962-017-0140-0
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发表时间：
2017
影响因子：
2.6
通讯作者：
M. Pintore;O. Starykov;T. Mittler;W. Volk;B. Tonn
中科院分区：
文献类型：
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作者：
M. Pintore;O. Starykov;T. Mittler;W. Volk;B. Tonn
金属材料化合物具有技术意义，因为它们可以将不同材料的特定性能结合到一个部件中。特别地，铜（Cu）和铝（Al）的化合物是当前的研究对象。有不同的制造工艺，如辊熔覆或堆焊。近年来，在其他复合材料铸造工艺中，研究了各种替代的结合方法。Cu-Al复合材料的一个显著问题是形成硬而脆的界面层，这降低了化合物的机械性能。因此，减少这些层是开发新的制造工艺以实现合适的工业应用的目标之一。本文采用重力铸造法制备了Cu-Al双层复合材料，并研究了热工艺参数对其性能的影响。开发了两套砂型铸造实验装置，并进行了不同热参数下的铸造实验。对铸造复合材料的试样进行了提取、金相检验和硬度分布测定。因此，这是可能的，以确定热参数对铸造Cu-Al双层复合材料的显微组织和硬度的影响。
Metallic material compounds are of technical interest as they allow the combining of specific properties of different materials into one component. In particular, compounds of copper (Cu) and aluminum (Al) are a current object of research. There are different fabrication processes, such as roll cladding or overlay welding. In recent years, a variety of alternative bonding methods were investigated, among other composite casting processes. A notable problem of Cu–Al composites is the formation of hard and brittle interface layers which reduce the mechanical properties of the compounds. Therefore, the reduction of these layers is one of the objectives of the development of new fabrication processes to realize suitable industrial applications. In this study, gravity casting experiments are carried out to produce Cu–Al bilayer composites and to determine the influence of the thermal process parameters on their properties. Two experimental setups using sand molds are developed, and casting experiments with varying thermal parameters are carried out. Specimens of the cast composites are extracted, metallographic examined and the hardness profile is determined. Hence, it is possible to identify the influence of thermal parameters on microstructure and hardness of cast Cu–Al bilayer composites.