Yinuo saw that many small partners did not understand why the flaming steel billet was not directly rolled but cooled and then re-heated in a rolling furnace for reprocessing. Is there any process difficulty? Today Yinuo will come to introduce to you.

First, let's understand the processing process: pouring, cooling and then heating, post-forming. Why is it not “hot” rolled directly after pouring, the third step actually plays the role of heat treatment and annealing, the workpiece after casting is very uneven from the structure point of view, this is a kind of “defect”, usually through normalizing or annealing Come in to remove and provide conditions for subsequent processes. At the same time it has the effect of stress relief.

Although "rolling while hot" seems to be "saving", considering the impact of casting defects and internal stress on processing and forming, this saving is likely to bring greater "trouble". The larger the volume or weight of the workpiece, the more complex the structure, the greater the impact of this defect. For large castings, sometimes homogenization treatment is performed. This is a treatment that is higher than the general annealing temperature, also called diffusion annealing. , Generally as high as 1050.

After processing and forming, stress relief annealing or normalizing can also be added as the final heat treatment, depending on the specific situation.

If you still have unclear questions about the steel rolling furnace, please contact us!