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目前国内外尚有不少压气机转子的2～5级叶片采用铝合金(17,2)制造,一般采用正常时效(模压成型后淬火时效)后使用。但外场检查发现,按这种方法生产的叶片一般使用50～100小时后,表面即出现不同程度的剥蚀损伤(图1),严重的可导致叶片折断,影响压气机功率,甚至引起喘振。为予防叶片早期失效,将叶片淬火后进行升高温度和延长时间的时效处理(称过时效),从而提高叶片的剥蚀抗力,延长叶片的使用寿命。本文通过断口分析,金属薄膜检查和振动疲劳试验,揭示了两种不同时效处理的叶片在组织结构和使用性能方面所起的变化,为铝叶片剥蚀——疲劳失效
At present, there are still many domestic and foreign compressor rotors 2 to 5 leaves made of aluminum alloy (17,2), the general use of normal aging (after molding quenching aging) use. But the field inspection found that the blade produced by this method generally used 50 to 100 hours after the surface erosion of varying degrees (Figure 1), the serious can lead to blade fracture, affecting the compressor power, or even cause surge. In order to prevent the early failure of leaves, the leaves will be quenched after the aging temperature and prolonged aging (called over-aging), thereby enhancing the leaf blade erosion resistance and prolong the life of the blade. In this paper, fracture analysis, metal film inspection and vibration fatigue test revealed the changes of the structure and serviceability of two kinds of leaves with different aging treatments.