HMW Härterei Michael Welser

Vacuum hardening

Vacuum hardening

Hardening in vacuum

This environmentally friendly and economical vacuum hardening process is particularly suitable for highly distortion-sensitive precision components that require a clean and oxide free surface.

By using vacuum, chemical reactions between parts and atmosphere are supressed. Thus, especially decarburization and surface oxidation are avoided. The cooling medium is nitrogen and quenching take place under high pressure.

The treatment parameters which can be precisely controlled achieve highly reproducible results. Hardening for challenging single components as well as serial production is state of the art.

The advantages of vacuum hardening, above all, the low distortion and the high dimensional stability. Metallic blanc surfaces, no oxidation and the high reproducibility can clearly be counted among the advantages of vacuum hardening.


Loyal HMW partners know that we use the Christmas holidays every year to carry out maintenance and repair work.
We will therefore be closed again this year from 23.12.2023 to 01.01.2024.

Neither collections nor deliveries are possible during this period.
Last delivery: 22.12.2023

We will be back for you on 02.01.2024.