Warm rolling ring forming method for high carbon chromium bearing steel with spheroidized structure

摘要

In the method of warm rolling ring forming of high carbon chromium bearing steel having a spheroidized structure, S1) a step of heating the ring blank to a temperature slightly higher than the critical temperature Ac1 of the material in a heating furnace and holding it for a certain period, and S2) heating A step of gradually cooling the subsequent ring blank in a heating furnace to a temperature slightly lower than the critical temperature Ar1 of the material; and S3) selecting a rolling feed rate by rationalizing the rolling rate, and making the ring blank a certain amount of deformation And rolling and forming within a deformation temperature range. The present invention can achieve spheroidization of the structure directly by warm ring rolling, and can omit the traditional spheroidizing annealing. Moreover, a finer spheroidized structure can be obtained, and energy consumption and time can be greatly reduced, structure quality can be improved, and production costs can be reduced. [Selection] Figure 1