Abstract
This study was carried out as a fundamental research for the method of salt bath nitriding.Object of the study: For finding out new methods of nitriding, in which the treatment is carried out rapider than that of the conventional methods and the nitriding for general constructional steels is made possible and effective.Contents of the study:(i) The mechanism of salt bath nitriding was examined by experiments and some theoretical considerations were taken into account.(ii) The experiments were conducted on 15 sorts of salt bath compositions. As the result, NaCNO-KCl-Na2CO3, or a eutective structure consisting of 3 elements, was selected because it was found to be most favorable.(iii) The effects of nitriding salt bath on various steels were investigated. The results showed that the characteristics of nitriding reaction depended upon the composition of steels.(iv) Each favorable condition of treatment for nitriding was made clear on each sort of steels.
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