Why do the springs made by the spring machine need to be tempered?

Why do the springs made by the spring machine need to be tempered?

The first is to strengthen the tensile strength. One of the purposes of tempering is to increase the tensile strength of the steel, to ensure that it can rebound normally, and to ensure the effect of the spring. The spring after tempering can increase the tensile strength to more than 90%, which reduces the creep resistance of the spring.

The second is to release the residual stress. In fact, the tempered spring can release the residual stress in time, so that it can be drawn or rolled normally. This gradually increases the service life of the spring and reduces the occurrence of fatigue and creep.

The third is to stabilize the shape of the spring. After tempering, the function of the spring can directly stabilize the shape of the spring. So that it will not be easily deformed. In this way, the stretching effect of the spring can be ensured.