Cold cutting saw cold bending test galvanized steel tube with nominal diameter not greater than 50mm shall be cold bending test.

The cold cutting saw is centered on the perforating end face of the tube billet and then sent to the heating furnace for heating.

The blade is usually made of high speed steel. The heat treatment technology of saw blade is more complex, in addition to making it achieve higher mechanical properties, but also to find ways to reduce deformation. Because the effective thickness of the saw blade is very thin, usually 0.5 to 3 mm, even in the heat treatment of excellent treatment methods and stable operation, deformation is inevitable.