Effect of multi-pass hot rolling process on the microstructure of steel 2.25Cr1MoNb

Effect of controlled multi-pass hot rolling process on the microstructure of steel 2.25CrlMoNb was investigated in this paper. The simulation experiment of thermo-mechanical treatment was carried out on the Gleeble-1500 system. Results show that the grain size and the ferrite volume fraction were improved obviously by multi-pass hot rolling.