Features of ion nitriding technology multicriteria optimization

Abstract

In this work, the technology of 30HGSA steel ion nitriding was optimized in terms of tribotechnical characteristics – wear intensity and friction coefficient. When choosing controlled factors, the influence of all existing groups of factors that can affect the process of ion nitriding is taken into account: structural, technological and operational. Friction and wear tests were carried out under conditions that are as close as possible to the actual operating conditions of aircraft parts made of 30HGSA steel. As a result of experiments on friction and wear, tribotechnical characteristics of coatings were obtained depending on structural, technological and operational factors, respectively, to the matrix. The conducted studies showed the presence of three clearly defined zones in the dependences of wear intensity and friction coefficient on specific load at different sliding speeds and technological parameters of ion nitriding: run-in zones, uniform and catastrophic wear. The nature of samples dependences hardened by ion nitriding and heat-treated samples is similar and coincides with modern views on the laws of friction and wear processes. Analysis of tribotechnical characteristics showed the effectiveness of ion nitriding technology in comparison with traditional heat treatment. The optimal processing modes for the studied steel and triboconjugation have been established

Establishing optimal parameters for resistance welding of agricultural machinery shafts

“…Paper [9] presents a methodology for optimizing technologies for coating application according to the strength and wear resistance criteria, which ensure the maximum possible strength and durability of the part with a coating at minimal cost for the coating application process. The prospects of using the optimization direction by the method of experiment factorial planning have been convincingly proven on such technologies as gas-flame and detonation spraying [10], vacuum plasma spraying [11], electric spark alloying [12], ionic nitriding [13], and finishing antifriction non-abrasive treatment [14,15].…”