How to solve cracks in round steel heated by ප්‍රේරක උනුසුම් උදුන?

In heating large-diameter round steel, because the heating speed is too fast or the cooling is too fast, the round steel will have cracks, and even severe section cracks will occur. Therefore, it is necessary to formulate a reasonable heating process, stable and uniform heating and cooling speed, and avoid cracks caused by the release of the stress of the round steel due to heating.