An investigation of metallurgical bonding in Al-7Si/gray iron bimetal composites
An investigation of metallurgical bonding in Al-7Si/gray iron bimetal composites
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DOI：
10.1557/jmr.2013.328
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发表时间：
2013-11-28
影响因子：
2.7
通讯作者：
Yang, Chuncheng
中科院分区：
文献类型：
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作者：
Liu, Yang;Bian, Xiufang;Yang, Chuncheng
采用重力铸造工艺获得了冶金结合良好的Al-7Si/灰铁双金属复合材料。对灰铁试样进行助熔和热浸镀等表面处理，在 Al-7Si/灰铁界面形成完整的冶金结合层。此外，还研究了含 0 至 5 wt% 5 种不同含量 Mn 的 Al-7Si 合金中浸浴中 Mn 对 Al-7Si/灰铁界面结合区显微结构的影响。显微组织分析表明，浸镀液中添加Mn可以消除有害的针状相(-Al5FeSi)，因为Mn含量不低于1.5 wt%，并且对于促进金属间相[-Al-15(FexMn1-x)(3)Si-2]和冶金结合层的生长也起着重要作用。 Al-7Si/灰铸铁界面处形成的良好冶金结合归因于表面处理和Mn含量选择的综合作用。
Al-7Si/gray iron bimetal composites with a sound metallurgical bonding were obtained by a gravity die casting process. The surface treatments of the gray iron specimen including fluxing and hot dipping were applied to forming a complete metallurgical bonding layer at the Al-7Si/gray iron interface. In addition, the effect of Mn in dipping bath on the microstructure of the Al-7Si/gray iron interfacial bond zone has been studied in an Al-7Si alloy containing five different levels of Mn ranging from 0 to 5 wt%. Microstructure analysis indicates that addition of Mn in dipping bath can eliminate the harmful needle-like phase (-Al5FeSi) as the Mn content is no less than 1.5 wt% and also plays an important role in facilitating the growth of intermetallic phases [-Al-15(FexMn1-x)(3)Si-2] and the metallurgical bonding layer. The sound metallurgical bonding formed at the Al-7Si/gray iron interface is attributed to combining the effect of surface treatments and selection of Mn content.