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由于用劣质燃油的燃气轮机日益增多,腐蚀问题,特别是高温下叶片的腐蚀较为常见。虽然近十年来,在发展高强度抗腐蚀叶片合金方面已取得了明显的进展,但欲使叶片达到预期的寿命,就可能要求额外的施加防护涂层。然而,随着涂层的应用就有可能降低基体合金的机械性能,这或是由于施用包埋涂层而采用了不相协调的热工艺过程,或是由于在施用复盖涂层的情况下,涂层本身存在缺陷而引起的,但这些问题借助于适当的质量监控措施以及涂覆后恰当的回复热处理,便可基本上得到克服。本文评述了涂层及其相关的工艺对某些大批生产的燃气轮机叶片材料高温机械性能的影响,并且讨论了在这一领域以及在漆层/基体稳定性方面开展进一步研究的价值。
Due to the increasing use of gas turbines with poor quality fuels, corrosion problems, especially at high temperatures, are more common. Although significant progress has been made in the development of high-strength corrosion-resistant leaf alloys in the past decade, additional protection coatings may be required to achieve the expected lifespan of the leaves. However, it is possible to reduce the mechanical properties of the base alloy with the application of the coating, either because of inconsistent thermal processes due to the application of the embedding coating or because, with the application of the covering coating , The coating itself is flawed, but these problems are substantially overcome by means of appropriate quality control measures and the proper heat-treatment after the coating. This paper reviews the effect of coatings and their associated processes on the high temperature mechanical properties of some of the mass produced gas turbine blade materials and discusses the value of further research in this area and in paint / matrix stability.