ВОССТАНОВЛЕНИЕ ДЕТАЛЕЙ АВТОТРАКТОРНОЙ ТЕХНИКИ ГАЛЬВАНОПОКРЫТИЯМИ С ДИСУЛЬФИДОМ МОЛИБДЕНА

Abstract

One of the most versatile and flexible technological methods of influencing the properties of the treated surfaces is the method of electrolytic deposition of composite materials. The analysis of modern scientific and technical literature has shown that the issues of restoration and hardening of worn parts of automotive equipment by composite electroplating with the use of molybdenum disulfide as a solid lubricant have not been sufficiently considered (Research purpose) The research purpose is improving the technology of restoration and hardening of worn parts of automotive equipment by composite electroplating with molybdenum disulfide as a solid lubricant. (Materials and methods) Electrodeposition of composite coatings from electrolytes-suspensions with the addition of molybdenum disulfide was carried out on the L1 DIGIT electroplating unit. The technological parameters of electrodeposition were indicated: a current density of 20 amperes per square decimeter, a deposition time of 60 minutes and a concentration of molybdenum disulfide of 5 grams per liter. (Results and discussion) We developed, tested and investigated a new technology for restoring and hardening worn parts of automotive equipment with composite electroplating using molybdenum disulfide as a solid lubricant, the effectiveness of which is confirmed by the coating properties: the microstructure of the coating has a fine-grained structure, without inclusions; uniform phase distribution and absence of pores, cracks and discontinuities; elements Fe, Mo and S in the coating They are distributed evenly; the phases of Fe and MoS2 carbides are present in the coating; the coefficient of friction of coatings on a friction path of 500 meters is less than 0.1. The proposed technology for restoring and hardening worn parts of automotive equipment makes it possible to provide the necessary tribotechnical properties of coatings. (Conclusions) The results of bench tests showed that the life of parts restored and hardened with composite electroplating using molybdenum disulfide as a solid lubricant is 1.22 times higher than the life of new parts.