The outer dimensions of the T8A steel large paper cutting blade are 1 300mm x 130mm Kerosene protection), 800 -820℃ Hot straightening. On the 60t friction press, first press the vertical direction, and then calibrate the side. Use large pressure when the temperature is high, use small pressure when the temperature is low, and pressurize for a longer time. The hot calibration should end at around 60°C.
Hang vertically and temper in nitrate salt at 240-260℃ for 2 hours.
If the side warpage is less than 2mm, the counterattack method can be used for straightening, that is, a relatively blunt high-speed steel hammer is used to hit the concave surface; if the vertical warpage occurs and the blade back is convex, the hot spot blade method can be used for straightening. When the side warpage is too large and cannot be cold-aligned, it can be straightened with plywood, tempered and straightened in nitrate salt at 300°C, and then used for counter-straightening after cooling.
en 
cn 
jp 
ko 
de 
es 
it 
ru 
pt 
vi 
th 
pl 
GS-ZP-1200
