航空发动机热端部件如涡轮叶片、涡轮转盘、整体铸造扩散机匣等长期服役后,虽然外观良好,但性能下降。采用恢复性能热处理技术,调整到寿部件中的析出相,全部或部分地恢复材料组织和力学性能,可延长到寿部件的使用年限。航空发动机涡轮工作叶片、导向叶片、扩压器、燃烧室机匣、涡轮盘等热端部件,多为镍基、钴基高温合金。在高温下长期工作,这些合金中的相会发生变化,强化相会聚集长大,有害相会沉淀析出,在高温和应力作用下甚至会出现微缺陷,导致材料的高温拉伸性能、持久性能下降。当性能下降过多时,构件存在失效 Aeroengine hot end components such as turbine blades, turbo turntables, integral casting diffusers and other long-term service, although the appearance of good, but the performance decline. The use of recovery performance heat treatment technology to adjust the life of the precipitated phase components, in whole or in part to restore the material and mechanical properties, can extend the service life of the life components. Aero-engine turbine working blades, guide vanes, diffusers, combustor casing, turbine disk and other hot end components, mostly nickel-based, cobalt-based superalloy. Under long-term working at high temperature, the phases of these alloys will change, the phases will gather and grow up, the harmful phases will precipitate, and even micro-defects will occur under the action of high temperature and stress, resulting in the high-temperature tensile properties and long-lasting properties decline. When the performance drops too much, the components are invalid