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Heat Treatment
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Hardening
In the manufacture of high stress gear components, the selection of a suitable material and the process of heat treatment is one of the most important factors.
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Our products are heat treated in the most modern process controlled furnace:
 Gas carburising in shaft and
chamber oven
Gas and plasma nitriding
Bath- and short time nitriding
Low distortion press hardening
Aligning up to 100 t |
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Brief description of the case hardening
and carbonitriding
Case hardening consist of carburizing or carbonitriding followed by hardening and either directly or after an intermediate cooling and drawing to an appropriate hardening temperature. Typically, at temperatures between 880° and 940°C carburised and subsequently at 820-850°C hardened in oil.
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The boundary layer before hardening is enriched with carbon (carburizing) or carbon and nitrogen (carbonitriding). The additional nitrogen enrichment effects compared with the carburizing by changing the transformation behaviour in the outer layer to a higher hardness and after quenching a higher case resistance.
Depending on the required performance characteristics and the requirements of the subsequent processing (i.e. grinding), it is tempered or frozen after hardening.
The case hardening and carbonitriding is used to give the surface of work pieces and tools made of steel, a much higher hardness and the work piece/tool better mechanical characteristics.
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