改善Fe_3Al金属间化合物涂层塑性的方法探讨

Discussion on Plasticity Improvement of Fe_3Al Intermetallic Compound Coating

Fe3Al金属间化合物涂层具有特殊的微观组织结构及一系列优异的性能,但其室温塑性较差,影响了其广泛应用。对于改善Fe3Al涂层塑性的方法有多种,效果较为明显的是合金化和热处理等技术。热处理能有效提高Fe3Al金属间化合物涂层的塑性,但其工艺繁琐,不利于工业应用。因此,研究工作重点应放在合金化增强其室温塑性方面。如加入最佳配比的多种合金元素(Cr、Nb、B、Ce等),综合发挥固溶强化、弥散强化及细晶强化的作用来改善其室温塑性,为Fe3Al涂层的工业应用奠定基础。

Fe3Al intermetallic compound has especial microstructure and some excellent performances, but its room temperature plasticity is poor, which limits its applications. At present, many methods can be used to improve the performances of Fe3Al coating, e.g. alloying and heat treating etc. Heat treating can markedly enhance the plasticity of Fe3Al coating, but the process is complicated, so it is not suit for the wide industrial applications. Therefore, the alloying strengthening should be the optimum method. For instance, the multi-elements alloying（Cr, Nb, B, Ce etc）, which have the systematically solution strengthening, dispersion strengthening and fine-crystal strengthening for improving the plasticity of Fe3Al coating, which can make a progress of Fe3Al coating for the industrial applications.