Situated at the heart of Belgium Nemotherm is the specialist in heat treatments of steel and non-ferro products. Our company was founded in 1976 and is one of the leading service heat treaters. 

Our competency has led to customers from a wider area knowing us, always entrusting their products and being advised by us in the choice of material and the associated heat treatment. The right choice of material in combination with the correct heat treatment makes an essential contribution to the strength, wear resistance and / or lifetime of the product. Our goal is to build up a long time relationship with our customers, and to meet the ever changing higher demands to your products we are certified to the following quality standards.

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From high to low alloys, from large to small parts,


With a great diversity of heat treatment technologies and services like blasting, cleaning, cryogenic, and shrinking we service customers from all over the Industry like Aerospace, Defense, Nuclear, Agriculture, Machine building, Railway, Automotive and other Industries in a most wide area. We believe that in an ever changing market it is important to deliver best technical support, highest quality and proactive communication to our customers. To be and stay the best we are continuously working on improvements with strong focus on new investments.

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Our Processes


Flame Hardening

Flame hardening is a technique used to harden (or soften) certain areas of a steel part, creating a difference in hardness between these areas. The advantage of local heating of parts is less distortion and for some steel types a higher hardness.

Flame hardening is closely related to Induction hardening but differs in some aspects, Flame hardening is almost unlimited in size or shape of the part so no need to build a special inductor for complex geometries. In general you can say that Flame hardening starts there where Induction hardening stops. However, there is one significant difference between these technologies; the heating time. Whereas Induction heating time is normally very short, the Flame hardening takes a longer heating time. This has its influence on the hardening profile. The Induction hardened profile shows a very abrupt hardness decrease whereas the Flame hardened profile shows a smoother decrease of hardness. A smoother decrease of hardness can be very helpful for heavy loaded applications to prevent the skin from popping off.

Size: up to 7meters length and 20 Tons


Atmospheric Heat Treatment

High temperature process under a protective gaseous atmosphere.

Atmospheric high and low temperature heat treatments, usually followed by rapid cooling (quench) in either oil, polymer or water are characterized by an atmosphere consisting carbon-bearing material to either enrich or restore the carbon content at the surface of the part, or just to avoid decarburization. In general you can say that the more carbon the more hardness after quench.
Typical processes are 

-    Carburizing
-    Carbon restoration
-    Carbonitriding
-    Neutral hardening
-    Normalizing


Size: up to 2meters length and 1,5 tons


Non-Atmospheric Heat Treatment

Non-atmospheric high and low temperature heat treatments are processes under air. 

These kind of processes are mainly used for parts that have to be post machined for several millimeters, parts that do not have or need a specific carbon content at the surface or high alloyed steels with low carbon content. Especially very large and heavy parts are treated this way. Also stress relieving is a process that is typically done in these furnaces.

Size: up to 8 meters length and 40 tons


Gas Nitriding

Very high surface hardness with minimum distortion.

Gas Nitriding or Nitrocarburizing are low temperature surface treatments to improve strength, sliding properties, wear resistance, temperature resistance and fatigue strength under reversed bending stresses. The process is carried out in a temperature range of 500-580°C.  In a cracked ammonia atmosphere, either with or without carbon, nitrogen diffuses into the parts. Because the temperature is low there will be no transformation of the steel resulting in less distortion than e.g. with carburizing or carbonitriding. Very often parts do not need to be post machined as distortion is very little.

Size: up to 2meters length and 1,5 tons


Vacuum Heat Treatment

To avoid oxidation or decarburization parts can be heated under vacuum.

The heating can be followed by slow or fast cooling with gaseous nitrogen. This process is mainly used for high alloyed  steels. Typical characteristic for vacuum treatments is the bright surface that is free of oxidation and colorization.
Typical processes are:
-    Hardening
-    Brazing
-    Solution annealing
-    Soft annealing
-    Normalizing

Size: 1300x1000x750 mm , max. 1200 kg



"We handle your parts with care."

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