Producing sheet steel component having areas of different hardness or ductility, comprises cold-forming sheet steel into component in first tool from a blank, and heating the formed component to temperature above austenitizing temperature

摘要

The method for producing a sheet steel component having areas of different hardness or ductility, comprises cold-forming the sheet steel into a component (1) in a first tool from a blank, and heating the formed component to a temperature above the austenitizing temperature, inserting into a second tool (2) and then quench-hardening in the second tool or heating the blank to a temperature above the austenitizing temperature, inserting into a forming tool and then forming and quench-hardening in the forming tool, where the energy is introduced into the areas using an induction coil (9, 10). The method for producing a sheet steel component having areas of different hardness or ductility, comprises cold-forming the sheet steel into a component (1) in a first tool from a blank, and heating the formed component to a temperature above the austenitizing temperature, inserting into a second tool (2) and then quench-hardening in the second tool or heating the blank to a temperature above the austenitizing temperature, inserting into a forming tool and then forming and quench-hardening in the forming tool, where either during quench-hardening in areas that receive lower hardness or higher ductility, the energy is introduced into the areas using an induction coil (9, 10) in such a way that reduced or no quench-hardening takes place because the cooling down takes place at a temperature above the critical hardening rate or the temperature in the area is held at a desired higher level until shaping or the hardened component is bought into or onto another form after the shaping, in or on which inductive action are applied to the component in partial areas in such a way that the existing hardness is partially or completely eliminated. In the second tool, the component is inductively heated at the temperature above the austenitizing temperature in the areas, in which the hardness is desired, where the induction is ended after reaching and keeping the temperature for a desired time. The component is cooled with a rate lying above the critical hardening rate. An independent claim is included for a device for producing a sheet steel component having areas of different hardness or ductility.