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刮片弹簧处于转子机心脏部位,是转子机的关键部件之一。由于它是在500～600℃的高温燃气中工作,同时还由于温度波动和交变机械应力的长时间作用,因此对刮片弹簧提出较高的技术要求:高的弹性极限,高温下松弛迟缓,疲劳强度大,缺口敏感性小,对燃气耐蚀,耐磨性及工艺性良好。为达到这些高温下的综合性能,必须解决采用什么材料、怎样加工和热处理等问题。从前,TZ2120A型转子机试用过pH、65WV、A286钢等多种材料的刮片弹簧,台架试验最高寿命都未超过80小时,即因松弛而失效。突破刮片弹簧耐久性指标
Blade springs in the rotor heart, is one of the key components of the rotor machine. Because it is in the high temperature gas 500 ~ 600 ℃ work, but also because of temperature fluctuations and alternating mechanical stress for a long time, so the blade spring put forward higher technical requirements: high elastic limit, high temperature relaxation lag , Fatigue strength, notch sensitivity, gas corrosion resistance, wear resistance and good technology. In order to achieve the comprehensive performance at these high temperatures, problems such as what material to use and how to process and heat treat must be addressed. Once upon a time, the TZ2120A rotor machine was tested with blade springs of various materials such as pH, 65WV, A286 steel and the maximum life of the bench test did not exceed 80 hours, that is, it lapsed due to relaxation. Break through the blade spring durability index