Defect Analysis and Improvement Measures for Turbine Rotor Forgings
A steam turbine rotor made of 30Cr1Mo1V was rejected due to unacceptable results after flaw detection.In order to analyze the causes of nonconformity after flaw detection,the anatomic analysis on steam turbine rotor was conducted.Sampling,macroanalysis and fracture crushing were carried out at the defect location,and the fracture surface was analyzed by scanning electron microscope and the energy spectrum analysis was made.The nature of defect was determined.It was a crack defect with O-Al-Si-Mn inclusions.By tracing the source of defects in smelting process,the technological parameters are optimized and a series of improvement measures are formulated to avoid the similar defects and the quality of products has been improved.
万方数据
维普
