National Polytechnic University, Erevan, Armenia:

G. S. Chibukhchyan, Candidate for a Master’ Degree, armenpack@mail.ru
M. G. Stakyan, Professor, Doctor of Engineering Sciences
O. S. Chibukhchyan, Candidate for a Master’ Degree

The article addresses the issues connected with the corrosion fatigue of mining machines subjected to climatic effects and varied complex loading (joint cyclic bending and twisting). According to the results of fatigue tests of steel samples under conditions as close as possible to the real-life environment, the data required to adjust periods of life and reconditioning of damaged parts and components in mining machines are obtained. The strength and longevity coefficients are proposed for the quantitative evaluation of various factors influencing corrosion fatigue resistance of equipment. The change in these coefficients depending on the single and combined effect of several factors (loading regime, stress concentration, pH, anticorrosion coating) is studied. The values of the coefficients for estimating load-bearing capacity of parts and adjusting service life of machines are obtained.

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