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一、前言许多与含有NaOH气氛或溶液相接触的低合金钢构件,如汽轮机的叶轮和转子、人造水晶高压釜的简体和堵头、制碱工业设备等,运行一段时间后常发生断裂,甚至爆炸事故。由于构件的受力状态、介质的浓度和温度不同,使断裂的方式也不同,又因为对这些低合金结构钢在NaOH溶液中的断裂行为不甚了解,所以对一些实际的断裂事故原因常常发生争论。我们选择了儿种常用的
I. INTRODUCTION Many low-alloy steel components, such as impellers and rotors of steam turbines, simplified and plugged man-made crystal autoclaves and industrial equipment for making caustic soda, often break when they are in operation for a period of time after they have been exposed to atmosphere or solution containing NaOH. Explosion accident. Due to the stress state of the component, the concentration and temperature of the medium are different, so that the fracture mode is also different, and because of the fracture behavior of these low-alloy structural steel in NaOH solution is not well understood, so for some actual causes of fracture accidents often occur debate. We have chosen a few kinds of commonly used