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首页> 外文期刊>Science and Technology of Advanced Materials >Dissimilar joining of nickel aluminide with spheroidal graphite cast iron and Cu alloy by hot pressing
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Dissimilar joining of nickel aluminide with spheroidal graphite cast iron and Cu alloy by hot pressing

机译：通过热压将铝化镍与球墨铸铁和Cu合金异种连接

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摘要

Joining of copper alloys (BC6) on spheroidal graphite cast iron (FCD) is effective to enhance the wear resistance of sliding parts. By applying combustion synthesis to a joining to FCD and BC6 has possibilities to enable the process at a lower temperature or for a shorter time. In this study, we examined the application of this process as joining of FCD and BC6 by using Ni-Al-Si compact as filler. Then the effects of the interface microstructure on joining were examined. As a substrate, FCD and BC6 cut into a column of 10.5Φ X 3 mm were prepared. Ni, Al and Si powders were mixed in the composition of Ni-28 at.%(Al-8 at.%Si), or Ni-78 at.%(Al-8 at.%Si). These powders were die-pressed with a load of 400 MPa for 60 s to the disc shape compact of 10 mm in diameter and 0.5 mm or 0.25 mm in thickness. Dense Ni-Al-Si intermetallic compound coating layer was formed by the combustion synthesis from the elemental mixture of Ni, Al and Si, and was simultaneously bonded with the FCD and BC6 substrate. The composition of the filler was Ni_3Al, Al_3Ni_2 and Ni solid solution. Unreacted Ni was almost consumed by the reaction with Al-Si. Densification was achieved in the interface between filler and substrate as well as in the filler due to molten Al-Si in the filler during hot pressing infiltrates well into the interface between filler and substrates and the boundary of each powder. Reaction layer of Ni-Al-Cu was formed in the interface between filler and BC6 achieving chemically bonding.
机译：将铜合金（BC6）连接到球墨铸铁（FCD）上可有效提高滑动零件的耐磨性。通过将燃烧合成应用于FCD和BC6的连接，可以在较低温度或较短时间内进行该过程。在这项研究中，我们通过使用Ni-Al-Si压块作为填充剂，研究了该工艺在FCD和BC6连接中的应用。然后检查了界面微结构对连接的影响。作为基板，准备切成10.5Φ×3mm的圆柱状的FCD和BC6。将Ni，Al和Si粉末以Ni-28 at。％（Al-8 at。％Si）或Ni-78 at。％（Al-8 at。％Si）的成分混合。将这些粉末在400 MPa的负载下模压60 s，制成直径为10 mm，厚度为0.5 mm或0.25 mm的盘状压块。通过燃烧合成由Ni，Al和Si的元素混合物形成致密的Ni-Al-Si金属间化合物涂层，并同时与FCD和BC6基板结合。填料的组成为Ni_3Al，Al_3Ni_2和Ni固溶体。与Al-Si的反应几乎耗尽了未反应的Ni。由于热压过程中填料中熔融的Al-Si渗入填料和基材之间的界面以及每种粉末的边界，因此在填料和基材之间的界面以及填料中都实现了致密化。在填料和BC6之间的界面中形成Ni-Al-Cu反应层，实现化学键合。

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