Heat treatments allow the structure of the material to be changed to achieve the required hardness properties. Polydec SA carries out some of these treatments in-house and subcontracts the rest to specialist partners.
In most cases, tempering is necessary for several reasons:
- reducing mechanical wearing
- creasing the useful life
- avoiding problems of deformation during assembly
- guaranteeing functionality (for example for test points)
The structural hardening of steel is obtained by heating the parts to a temperature of between 800 and 1000°C, and then quickly cooling them. This treatment makes the steel harder, but also more brittle. To achieve a good compromise, parts are heated a second time to a certain temperature that depends on the desired hardness. This stress relief is called "temperingtempering, (tempered)Hardening through heat treatment and normalization or mechanically worked steel to some temperature below the transformation...