Dobrovolsky Sergey V. — Candidate of Technical Sciences, Associate Professor; Moscow Aviation Institute (National Research University), engineer of research department 204
E-mail: dobrovolskiy_s@mail.ru

Glukhovskaya Yulia I. — Moscow Aviation Institute (National Research University), specialist engineer of research department 204
E-mail: gljul@bk.ru

The article explores the possibilities of using gas-dynamic methods of forming a material for the restoration of metal objects. The disadvantages and advantages of the currently used additive restoration technologies are analyzed. The choice of the cold gas dynamic method is justified as the most suitable for restoration conditions, the features of its use and the limitations caused by the technology of its application are shown. Previous experiments have shown that the quality of the formed material depends on the solution of a multiparametric problem, the main parameters of which are the particle size, its mass, the temperature of the heterogeneous flow, the angle of incidence of the particle on the surface, the distance from the accelerator slice to the surface, the shape of the surface itself, surface preparation and particle material. Possible directions of using the cold gas dynamic method for the restoration of metal products are considered. The options for the development, design and manufacture of specialized restoration gas dynamic installations are being investigated. Analyzing the specifics of the method described in the article, the authors conclude that for each type of restored object, it is necessary to calculate, design and manufacture a heterogeneous flow accelerator taking into account the laws of gas dynamics. The calculation result of a heterogeneous flow accelerator used for the restoration of large flat surfaces is presented. An example of an accelerator that turns the flow at a right angle and an accelerator used to operate on internal cylindrical surfaces is given.

Cold gas dynamic method, erosion and corrosion wear, heterogeneous flow, heterogeneous flow accelerator, installation for forming material by cold gas dynamic method, particle of powder material, restoration of metal objects.