Fracture Failure of Bent Pipe of Roof Superheater in Supercritical Boiler
Through the methods of microscope analysis,mechanical analysis,chemical analysis,metallographic examination and scanning electron microscope,the causes resulting in rupture of bent pipe(12Cr1MoV) of roof superheater in insupercritical boiler were analyzed.The results indicate that the bent pipe fracture failure is brittle fracture.The welding defects,excessive stress and lower working temperature in bending are the primar reasons for fracture failure.