For new energy power generation turbine complex speed level blade failure fracture strength analysis and physical and chemical test analysis,the results show that the failure blade grade 12Cr13 steel Mn element content is too high,can cause the blade in high temperature form large internal stress cause blade deformation and cracking tendency,and in the lower end of the root steps,the two blade in operation early fatigue micro crack,in alternating stress acceleration micro crack expansion,eventually lead to blade fatigue fracture.Finally,put forward prevention and quality control measures.
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万方数据