Overview
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ABSTRACT
This article focuses on the identification of alloys that are generally nitrided or nitro-carburized, the prerequisites for implementation and a review of expected properties. The chapter on defects provides practitioners with references in relation to the desired quality. The last chapter provides promising approaches for distinguishing between the various processes.
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Read the articleAUTHOR
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Claude LEROUX: Engineer from the Conservatoire National des Arts et Métiers (CNAM)
INTRODUCTION
Industrial processes for nitriding and nitrocarburizing iron-carbon alloys are described in
In addition to this surface reaction, which is limited in thickness, the various processes feature a thermochemical reaction, mainly involving nitrogen diffusion, which introduces a gradient of hardness in depth, strongly dependent on the nature and concentration of alloying elements in the treated material. The laws of diffusion, or Fick's laws, define the diffusion coefficient, a function of temperature and alloy composition, and the diffusion rate. The theoretical aspects of this mechanism were defined at
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The Ultimate Scientific and Technical Reference
KEYWORDS
defects | nitriding | nitrocarburising | nitriding steel | quality control | pre-heating
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Metal treatments
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Nitriding and nitrocarburizing
Bibliography
Standards and norms
- Aciers pour trempe et revenu. - NF EN 10083 -
- Aciers de cémentation et carbonitruration. - NF EN 10084 -
- Aciers pour nitruration. - NF EN 10085 -
- Aciers inoxydables. - NF EN 10088 -
- Aciers à outils. - NF ISO 4957 -
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