Rotor-can is one of the key components of the canned reactor coolant pump to protect the rotor from corrosion damage in nuclear industry.It demands high dimension precision,posing great challenges to the processing technology.Vacuum hot bulge forming process is a potential technique to control the manufacture precision.In this paper,a 2-D nonlinear thermal-mechanical coupled finite element model(FE model)was established to simulate vacuum hot bulge forming process of rotor-can with ring-shaped outward defect.The displacement field of rotor-can and the height of ring-shaped outward defect after vacuum hot bulge forming process were calculated.The effects of process parameters,including holding time,holding temperature and bulging clearance,on vacuum hot bulge forming process of rotor-can with ring-shaped outward defect were analyzed.Results showed that to ensure the radius of the rotor-can can meet the requirement,when bulging clearance is fixed,holding temperature should also be fixed.The residual height of ring-shaped outward defect is decreasing with the decreasing of bulging clearance and increasing of holding temperature.
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