APPLICATION OF COMBINED TECHNOLOGY FOR RENOVATION AND INCREASED RESOURCE DETAILS OF MEANS OF TRANSPORT

Abstract

It presents various combinations of primary hardfacing technology for the renovation and improvement of the resource details of ship machinery. Currently, promising are integrated or combined methods hard facing (hybrid technology) coating in conjunction with the modification, the application of multi-layer, multi-functional coatings; development of integrated multioperational technologies. In all conditions, increasing scarcity of expensive alloying materials included in the composition of steels requiring high strength properties of the complex, are promising hybrid technology peening (restore) the surfaces of mild steel Combinations of various primary technologies of application of multipurpose coverings for restoration and increase of a resource of details of knots and units of vehicles are presented. Currently promising are combined methods of application of multifunctional coatings (integrated, hybrid technologies), methods of coating in combination with methods of modification, application of multilayer, multifunctional coatings; development of combined (integrated, hybrid) multioperational technologies. In the conditions of growing shortage of expensive alloying materials which are a part of the steels demanding a high complex of properties of durability, the combined methods of restoration of surfaces are perspective.At present, a methodology for the synthesis of combined multi-operational technologies has not been developed. An empirical-intuitive approach prevails in the combination of multifunctional coating restoration methods. The optimal choice of restoration methods and their sequence is determined by the increase of hardness, complex of mechanical properties, wear resistance, as well as the roughness of the restored surface and the accuracy of the dimensions of the restored part. In the first-best case of combined (hybrid) methods of recovery, the criterion of choice is the comparison of costs and increase the set of mechanical properties of the recoverable parts of components and units of vehicles [13-14]. Each method of recovery has its niche of optimal conditions of use, including even the technological traditions that have developed in a particular enterprise. The decisive factor in the choice of primary methods of applying multifunctional coatings in the combined restoration process is the presence of certain types of equipment at the enterprise and the ability to integrate them intoa single technological cycle. In order to restore vehicle parts with multifunctional coatings with high adhesion strength, hardness and wear resistance, we have proposed a combined (integrated) technology that includes electric arc spraying, electrospark doping and pulsed ion nitriding.