Wyniki 1-1 spośród 1 dla zapytania: authorDesc:"Volodymyr DRAGOBETSKII"

Application of explosion treatment methods for production Items of powder materials DOI:10.15199/48.2019.05.10

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To successfully solve a set of interrelated tasks to maintain competitiveness in the world market, increase labor productivity, use capital efficiency and maintain high rates of economic development, the major role belongs to the methods of the powder metallurgy. These methods, due to a number of advantages, in comparison with the other methods of metal working find wide application in the production of blanks and parts of gas turbine engines, cutting and stamping tools, energy conversion and generation systems, surgical implants, etc. At the present time, the compaction of powder materials is most efficiently performed using the high-energy methods of deformation and shaping, such as: the hot isostatic pressing, intensive plastic deformation, dynamic pressing, isothermal stamping into a closed volume, explosive pressing, etc. [1]. The main disadvantage of the blanks obtained by all known methods of the powder metallurgy is the residual porosity, which reduces the mechanical and physical properties and performance characteristics of the resulting parts. To further maintain the high growth rates of key sectors of production and economy it is necessary to find methods to improve the mechanical properties of blanks and parts of the powder metallurgy. The pulse methods of the metal working in a series of cases allow either significantly improve the quality indices of parts wedging in the existing methods or entirely substitute them. For instance, in case an additional pulse effect of insignificant intensimty is made on the workable blank during the hot isostatic pressing after the primary sintering, then the parts will have the structure with the unsurpassed density [2]. The mechanism of obtaining the dense structures is theoretically and experimentally grounded by the authors [2, 3]. Research methods In the explosive pressing the density of the products obtained practically reaches the density of a solid. However, at the ex[...]

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