When it exceeds the yield strength of the material, it will cause deformation of the work, and exceeding the strength of the material will cause the workpiece to crack.
This is its harmful side and should be reduced and eliminated. However, under certain conditions, controlling the stress and reasonably distributing it can improve the mechanical properties and service life of the part, and turn harmful into powerful.
Analyze the stress distribution and change law of steel during heat treatment, so that its reasonable distribution has far-reaching practical significance for improving product quality. For example, the influence of the reasonable distribution of surface residual compressive stress on the service life of parts has attracted widespread attention.