Effect of Ultra-fast Cooling Process on Spheroidal Annealing of Bearing Steel
The effects of ultra-fast cooling process on the microstructure and mechanical properties of bearing steel after hot rolling and then spheroidal annealing were investigated.The results show that it is obvious for spheroidal annealing structure the adopt ultra-fast cooling process.Spheroidal annealing structure is satisfactory and hardness increases with the decrease of final cooling temperature.The ultra-fast cooling process contributes to good spheroidal effect of pearlite.