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Nitriding Treatment

Nitriding Treatment Technology

Nitriding is a form of heat treatment that produces nitrides with a high degree of hardness by combining nitrogen with aluminum, chromium, molybdenum, titanium or vanadium parts.
Since the part does not harden due to changes in its structure, nitriding reduces strain when compared to carburizing. In addition, nitriding treatments are undertaken at between 500 and 550 degrees Celsius, which also make it a more eco-friendly treatment process.
With the trend of integrating parts and demand for high precision, nitriding through atmosphere control has garnered attention as a heat treatment technology with less strain.
However, conventional gas nitriding leads to abrasion and variation in part dimensions because a greater than necessary compound layer is produced on the surface. In order to resolve this problem, we have established a technology using an H2 sensor that controls the thickness of the compound layer based on the nitriding potential.

The ONEX Advantage

We are able to control the composition of the nitriding layer, including the thickness of the compound layer, by controlling the atmosphere. This enables us to provide optimal nitriding properties to accommodate the required function.
We have systematically organized experiment data from our Research Institute of Technology on a variety of steel types from both Japan and abroad, which positions us to accommodate a truly wide range of part needs.
By controlling the thickness of the compound layer, we are able to reduce the number of man hours used for machining to grind as well as remove excess materials in the post-processing stage and reduce the edging effect. This can also be used efficiently as a pre-treatment for coating.

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