For the manufacture of stainless steel seamless pipes, corresponding annealing treatment is carried out after each cold drawing. The purpose of annealing: reduce hardness and improve machinability. Eliminate residual stress, stabilize size, reduce deformation and cracking tendency. Refine grains, improve organization, and eliminate organizational defects. Make the material organization and composition uniform, improve material properties, and prepare for subsequent heat treatment. The stainless steel seamless steel pipe annealing furnace is to heat the steel pipe to a temperature slightly higher than Ac1, keep it warm for a certain period of time, and then cool it to 550℃~600℃. The heat treatment process of air cooling is called stress relief seamless steel pipe annealing.
The seamless steel pipe annealing furnace adopts medium frequency heating device, which is specially designed for seamless steel pipe continuous annealing furnace. According to its characteristics of heating in motion and the characteristics of the heated workpiece being seamless steel pipe, the medium frequency power supply and sensor parameters are designed in the system. Special design, the whole set of seamless steel pipe annealing furnace production line equipment system adopts separate power supply control, stable performance.

The ratio of the inner diameter of the induction coil formed by the seamless steel tube to the outer diameter of the workpiece is within a reasonable range and is designed according to the process parameters of the induction heating furnace provided by the user. The inductor coil is made of a large-section T2 rectangular copper tube through annealing, winding, pickling, hydraulic pressure testing, baking, drying, knotting, assembly and other main processes, and then fixed as a whole, and the entire inductor is completed. After being formed into a rectangular parallelepiped, it has good vibration resistance and integrity.
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