In the heat treatment, we should pay attention to their deformation and consider a method of putting them down, so as to select a more suitable heat treatment device. On the premise of repair, several tempering and hot pressing treatment can be carried out, and the cable distance can be adjusted according to the needs during winding. The screw pitch can be taken as 3 ~ 14 times of the diameter of steel wire, but the ordinary one can only be taken 8 ~ 13 times when it is the best.

There are also many precautions in the use of special-shaped spring, such as how to prevent failure, the spring fracture under the joint action of cyclic load and corrosive medium, and the spring fracture under the joint action of tensile stress and corrosive medium, so customers should pay more attention to it.