一台大型锅炉给水泵在运转中主轴突然断裂,总运转寿命仅38小时。断轴事件引起了有关方面极大关注和疑虑,因为按一般规律,水泵轴的寿命可达数月,甚至数年。 受工厂委托,我们对失效水泵轴进行了化学、气体、机械性能和微观断口分析,发现氢致延迟破坏是导致水泵轴失效的主要原因。 A large boiler feed pump in operation suddenly broken spindle, the total operating life of only 38 hours. Broken shaft incident caused great concern and concern, because according to the general law, the life of the pump shaft up to several months, or even years. At the factory commissioned, we analyzed the chemical, gas, mechanical properties and microscopic fracture of the failed water pump shaft. We found that the delayed hydrogen damage was the main reason for the failure of the water pump shaft.