Simulation and Analysis on Microstructure Evolution of Large Generator Retaining Ring during Multi-Fire Forging
In order to investigate microstructure evolution of Mn18Cr18N retaining ring during the multi-fire forging, a series of constitutive equations for dynamic recrystallization, static recrystallization, meta-dynamic recrystallization and grain growth were developed and implemented into a Deform FE simulator. The single-axial hot upsetting test has been performed to investigate the process of microstructure evolution and to show validity and effectiveness of the developed program. Then based on the modified boundary condition, hot forging process for 300MW retaining ring was put into effect. The results have displayed that the microstructure prediction tool was validated by comparing the simulated grain structure with that of the experiment and it could provide a reference to optimize forging processes in the production of retaining ring.
Zhengyi Jiang and Chunliang Zhang
W. W. He et al., "Simulation and Analysis on Microstructure Evolution of Large Generator Retaining Ring during Multi-Fire Forging ", Advanced Materials Research, Vols. 97-101, pp. 176-181, 2010