New special-shaped spring steel forming process
According to the principle of warm plastic deformation and induction rapid heating, the forming process of special-shaped spring steel is studied and tested. The results show that the new process of medium-frequency rapid heating and medium-temperature rolling can effectively solve the surface decarburization and free graphite carbon precipitation during the forming process of special-shaped spring steel. The difficulty.
The key to the production of spring steel is to prevent surface decarburization and precipitation of free graphite carbon. After the surface is decarburized, the strength of the surface layer is reduced, and the resistance to long-term repeated loads is also reduced, and fatigue cracks are prone to occur until fatigue fracture. The deeper the decarburization layer, the faster the fatigue damage occurs. The precipitation of free graphite carbon is not allowed to exist in the carbon steel spring, which will cause brittle failure of the material in use.