The effect of different treatments on torque springs

The effect of Torsion Spring after different treatments

In order to avoid creep and looseness, torque spring working under high temperature conditions should be subjected to heating and pressure treatment or creep tempering. Heating and pressure treatment refers to the strong pressure treatment of a torsion spring under conditions higher than the operating temperature. The process of low-temperature tempering under loading conditions (usually deformation or winding during operation) is called creep tempering. The main difference between the two lies in stress and holding time, both of which have a two-layer effect of strengthening and stress relieving annealing. This is beneficial for working with metal spring in slightly higher temperature environments. On the one hand, it can avoid loosening of the metal spring, and on the other hand, it can withstand fatigue intensity.

After standing or strong pressure treatment, if low-temperature tempering is carried out, the proportional limit and load-bearing capacity of the spring hardware will be increased, especially for fine torsion spring and slightly higher temperature torque spring, which have a significant effect on improving the spring function and the qualification rate during the process.

Low temperature tempering after standing or strong pressure, considering the residual strain at the microscopic level between the metal lattice during processing and the decrease in residual stress at the microscopic level that does not cause strengthening, the tempering temperature should be slightly lower than the temperature for stress relief annealing. Generally speaking, the tempering temperature of copper Wire forming spring is 160-200 ℃, with insulation for 1 hour; The tempering temperature of steel spring is 200-400 ℃, with insulation for about 30 minutes.