​Bearing steel ingots are generally subjected to long-term diffusion annealing at a high temperature of 1200 ~ 1250 ℃ to improve carbide segregation. The atmosphere in the furnace should be controlled during hot working, the heating temperature of the billet should not be too high, and the holding time should not be too long to avoid serious decarburization. The final rolling (forging) temperature is usually between 800 and 900 ℃. If it is too high, it is easy to appear coarse network carbides, and if it is too low, it is easy to form rolling (forging) cracks. The finished rolled (forged) material should be quickly cooled to 650°C to prevent cementite from precipitating in a network on the grain boundary. If conditions permit, a controlled rolling process can be used.

The stainless steel bright annealing production line (BAL) of a steel mill is a large-scale production line designed and manufactured by a foreign company for bright annealing stainless steel strips. Its total height is 55m, and it can handle stainless steel plates with a width of 600 to 1250 mm and a thickness of 0.1 to 3.0 mm. belt.

what are the differences among 2E, 2D, 2B and BA?

In most cases of cold rolled stainless steel strip, annealing process is needed to achieve appropriate mechanical properties by continuous bright annealing furnace.

the post covers main deffects of bright annealed strips by bright annealing furnace.

the difference between continuous annealing furnace and bell annealing furnace.