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一、前言燃气轮机通常在高温、高压及高转速的条件下工作,这就使其中的一些主要部件(例如动、静叶片、涡轮盘、火焰筒等)的服役条件变得十分苛刻,从而对材料提出了严格的要求: (1)燃气轮机在起动、停车及调节功率时,静、动叶片承受剧烈的温度变化,产生热冲击及交变热应力,要求材料具有较高的热疲劳强度。(2)动叶片受自身及连接件的离心力作用而产生的静应力,要求材料具有足够的高温屈服强度;长时高温作用使蠕变加剧,要求材料具有高的蠕变抗力及
I. INTRODUCTION Gas turbines usually work under conditions of high temperature, high pressure and high speed, which makes some of the main components (such as moving, static vanes, turbine disks, flame tube, etc.) service conditions become very harsh, so the material (1) When the gas turbine starts, stops and adjusts the power, the static and dynamic blades withstand severe temperature changes, resulting in thermal shock and alternating thermal stress, which requires the material to have high thermal fatigue strength. (2) The static stress caused by the centrifugal force of moving blades and the connecting pieces of the moving blades requires the material to have sufficient high-temperature yield strength; the action of long-time high temperature accelerates the creep and requires the material to have high creep resistance and