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**Chapter 6** 

© 2012 Zumbilev, licensee InTech. This is an open access chapter distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

© 2012 Zumbilev, licensee InTech. This is a paper distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Nitriding and carbonitriding are used as basic processes for details and tools surface strengthening, during which a layer is formed on their surface, containing nitrogen or a

When these two methods are used in conventional gas furnaces or in salt baths, the thickness of the layer or the composition of the resultant layers could not be reliably regulated, which necessitates varying with the potentials of nitrogen and carbon in the gas mixture or the liquid medium. The percentage of nitrogen and active carbon is defined by a few parameters, namely, temperature and composition of the gas mixture, and the

During the process of carbonitriding and nitriding in glow discharge plasma these difficulties are resolved, which is an essential advantage of this method. The usage of glow electric discharge is a perspective method for nitriding and carbonitriding of materials in

The works [1,2,3,4,5] consider mainly the mechanism of building, the structure and the properties of the nitrided layers, obtained in low-temperature plasma, and present the peculiarities of carbonitriding in glow electric discharge. There is lack of data concerning carbonitriding in glow discharge plasma in an actuating medium, consisting of ammonia and gas corgon (82% Ar and 18% CO2), and there also lacks sufficient information of any

comparative investigations between the two processes – nitriding and carbonitriding.

It is established in the works [3,5] that, when in the process of carbonitriding propanebutane is used as a carbon-carrier, the phase composition of the combined zone in the carbonitrided layer could not be precisely regulated. Better results could be obtained when

**Carbonitriding of Materials in** 

**Low Temperature Plasma** 

Additional information is available at the end of the chapter

Angel Zumbilev

**1. Introduction** 

http://dx.doi.org/10.5772/50595

combination of nitrogen and carbon.

possibilities for variation are limited.

modern machine building.


**Chapter 6** 
