Induction Tempering

  For the whole induction hardening workpiece, especially the induction through heating hardening workpiece, the application of induction heating tempering is more convenient to form the induction heat treatment assembly line, and more conducive to realizing mechanization and automation. Induction through heating quenching commonly used medium frequency generator (such as the heating of medium thickness steel plate, lead screw blank, bearing ring, etc.), induction tempering is a commonly used power frequency induction heating machine.  A high-frequency induction heating machine can also be used for the thin parts local induction tempering process.

  Induction tempering is using the electromagnetic induction method to make the heated workpiece internally generate an electric current. The energy of these eddies is used for induction heating and tempering, to reduce the tensile stress of the transition layer, the depth of heating should be larger than the depth of the hardened layer. Therefore, it is necessary to use a lower current frequency or smaller specific power to prolong the induction tempering time and make use of the workpiece heat conduction to thicken the heating layer. Because the induction heating tempering time is short, the induction tempering temperature should be appropriately increased. The workpiece after surface quenching by induction heating can be tempered in a furnace, self-tempering, or induction tempering.