Sometimes only the surface of the part, sometimes the entire part, is heated and hardened.
The surface is hardened by rapidly heating the material to high temperatures and cooling it.
It is one of the interrupt quench methods. The parts are quenched in a warm bath.
The oldest heat treatment method, the material is heated and cooled in a protective or normal atmosphere.
It is the heat treatment performed before aging on metals hardened by precipitation.
Deep cooling performed to complete the transformation of metals whose martensite finish temp. is at minus tem.
It is done to recover the internal structure of the material after processes such as forging, rolling or casting.
The parts heated in an oxygen-free environment are hardened by pressurized gas.
Heat treatment performed to reduce stresses within the material after welding, plating, grinding or machining.
Hardening is done by heating and cooling some of the parts with laser beams.
In this process, where thermal shock is minimized, very little stress remains in the part after the heat treatment.
Hardness gain is achieved by the precipitation of dissolved solid compounds in the matrix.
