Wear of iron–aluminide intermetallic-based alloys and composites by hard particles
Wear of iron–aluminide intermetallic-based alloys and composites by hard particles
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DOI：
10.1016/s0043-1648(01)00745-1
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发表时间：
2001-10
期刊：
影响因子：
5
通讯作者：
D. Alman;J. Hawk;J. Tylczak;C. P. Dogan;Rick D. Wilson
中科院分区：
文献类型：
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作者：
D. Alman;J. Hawk;J. Tylczak;C. P. Dogan;Rick D. Wilson
在这项研究中，评估了合金和基于金属间化合物Fe3Al和FeAl的复合材料的抗硬颗粒磨损性能，并与选定的金属、合金、其他金属间化合物和陶瓷的行为进行了比较。在室温下对这些材料进行了销钉磨损试验。此外，还发现随着二元Fe-Al中Al原子百分比的增加，合金的耐磨性变得更好。综上所述，这些合金的耐磨性从最高耐磨性到最低耐磨性依次为：FeAl>；Fe3Al>；α-Fe合金，含16at.%Al>；纯Fe&>Al。根据不同合金的硬度对这些结果进行了讨论。硬质第二相(如TiC或TiB2)的加入量在40%到70%之间时，Fe3Al和FeAl复合材料的磨损率比母合金降低了一个数量级。此外，还对FeAl合金、FeAl+80vol.%TiC、FeAl+80vol.%WC、FeAl+80vol.%TiB_2金属陶瓷进行了25℃、180℃、500℃和700℃的固体颗粒冲蚀试验，并与几种常规合金和硬质合金(WC-Co)的冲蚀行为进行了比较。FeAl合金和复合材料的抗冲蚀性能排序为：(最耐磨)FeAl-WC>；FeAl-TiB_2>；FeAl-TiC>；FeAl(最差)。这一行为与金属陶瓷的微观结构和材料去除机制有关。
In this study, the resistance of alloys and composites based on the intermetallic compounds Fe3Al and FeAl to wear by hard particles was assessed and compared to the behavior of selected metals, alloys, other intermetallic compounds and ceramics. Pin abrasion tests were performed on these materials at room temperature. Among other things, it was found that as the Al atomic percent in binary Fe–Al increased, the alloys became more abrasion resistant. In summary, the ranking of the alloys in terms of abrasion resistance from the most resistant to the least resistant proceeds as follows: FeAl>Fe3Al>α-Fe alloy with 16at.% Al>pure Fe>pure Al. These results are discussed in terms of the hardnesses of the respective alloys. The addition between 40 and 70vol.% of a hard second phase (e.g. TiC or TiB2) decreased the wear rate of the Fe3Al and FeAl composites by an order of magnitude compared to the parent alloy. In addition, solid particle erosion tests were performed on an FeAl alloy, and FeAl+80vol.% TiC, FeAl+80vol.% WC, FeAl+80vol.% TiB2cermets at 25, 180, 500 and 700°C, and the results were compared to erosion behavior of several conventional alloys and cemented carbides (WC–Co). The ranking of the erosion resistance of the FeAl alloys and composite materials was as follows: (most resistant) FeAl–WC>FeAl–TiB2>FeAl–TiC>FeAl (least resistant). This behavior was related to both the cermet microstructure and material removal mechanisms.