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35Ni-15Cr型铁基高温合金是我国自行研制的发动机涡轮盘材料。它的综合性能良好,组织稳定,可以满足650～700℃以下长期使用的发动机涡轮盘的要求。一种新材料要在发动机中正式使用,必须通过长期试车和试飞考验。然而这类试验极其昂贵而且周期很长。为了考核涡轮盘盘体和榫头部分的强度,先用成品盘进行超转超温试验是适宜的。 用自制的立式试验器进行本试验。六个热电偶装于涡轮盘的不同部位,以测量温度场。用光电测速装置和齿轮测速装置同时测量转速。为了测量轮盘超转试验后直径方向的尺寸变化,试验前在涡轮盘的四个不同位置作标记。
35Ni-15Cr-based iron-based superalloy is developed by our own engine turbine disk material. Its comprehensive performance is good, stable organization, to meet the long-term use of 650 ~ 700 ℃ engine turbine disk requirements. A new material to be used officially in the engine, must pass the long-term test and test flight test. However, such tests are extremely expensive and have a long cycle. In order to assess the strength of the turbine disk body and the tenon section, it is appropriate to first use the finished disk for over-rotation over-temperature test. The homemade vertical tester for the test. Six thermocouples were installed on different parts of the turbine disk to measure the temperature field. Use photoelectric measuring device and gear speed measuring device to measure the speed at the same time. In order to measure the dimensional change in the diameter direction after the wheel overturning test, four different positions of the turbine disk are marked before the test.