Analysis and Improvement of Steam Turbine Last-stage Blade Fracture
The chemical composition and mechanical properties at room temperature,microscopic structure and domain composition of the turbine last stage vane made of 0Cr17Ni4Cu4Nb steel,were tested.The results show that the chemical composition,mechanical properties at room temperature and metallurgical structure can comply with the regulations,but there is a point pit with domain poor chromium on the surface of brazed satellite alloy.Then,some feasible suggestions can be put forward.