HMW Härterei Michael Welser




The oxidation of the workpieces can be performed as a separate process, or ideally in conjunction with nitriding processes. Depending on the quality of steel, oxidizing creates an anthracite black surface and has the advantage of protecting the workpieces from corrosion.

The oxide layer is 1 – 3 µm. In addition, oxidizing also improves sliding and friction properties.


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.