Increase of precision of casting blocks by applying acoustical oscillations in gas-impulsive moulding

The present article shows the results of the theoretical and empirical research of the study of the impact made by acoustical oscillations on the working process of a gas-impulsive moulding device with the purpose of increasing the quality of the casting blocks’ seal and decreasing the roughness of the surface of a casting block. It has been shown that acoustical oscillations intensify the working process of the gas-impulsive moulding device. With the increase of frequency and power of oscillations the hardness of a casting block first sharply rises, but then gradually decreases. It has been found out that oscillations may help to adjust the precision of a casting block due to high sensitivity of a gas-impulsive process to the frequency of oscillations. The use of acoustical oscillations broadens technological opportunities of the moulding device

THE SCIENTIFIC RESEARCHES DIRECTED ON RECEIVING PREPARATIONS FROM THE TEXTURED METAL SHEET WITH THE SET PROPERTIES

Текст статьи не публикуется в открытом доступе в соответствии с политикой журнала.In work short results of a technique of development of laboratory schemes of obtaining the textured metal sheet with anisotropy of physicomechanical properties, on the basis of the principle of symmetrization-dissymmetrization of Shubnikov-Curie method of the differential longitudinal rolling drawing developed are presented

DEFORMATION FEATURES OF THE CENTRAL LAYERS OF Fe - 3%Si(110)[hkl] ALLOY BY ROLLING WITH A ROLL DIAMETER OF 90 MM

The article presents the results of studies of the effect of initial crystallographic orientation and deformation modes on rolling texture in the central layer of Fe - 3%Si(110)[hkl] single crystals. Several groups of samples of single crystals were rolled under laboratory conditions. The groups of samples were classified according to the final deformation rate, the ideal crystallographic orientation of the rolling plane and deflections of the direction of the ideal orientation plane from the rolling direction. The methodology of the experiment took into account the amount of reduction rate during one rolling. Radiographic method was used to analyze the results of rolling. The obtained data was superimposed on a stereographic projection, and straight pole figures were built. The results of decoding direct pole figures revealed differences in the formation of the texture from the previously obtained results. The research shows the manifestation of the one-component deformation texture in the central layer

THE SCIENTIFIC RESEARCHES DIRECTED ON RECEIVING PREPARATIONS FROM THE TEXTURED METAL SHEET WITH THE SET PROPERTIES

The process of metal forming is widely used in metallurgy, machine-building and other industries of production of semi-finished and finished products made of ferrous and nonferrous metals and their alloys. From this standpoint, the important value obtains scientific research aimed at designing the properties of metallurgical blank of the machine-building complex. In work short results of a technique of development of laboratory schemes of obtaining the textured metal sheet with anisotropy of physicomechanical properties, on the basis of the principle of symmetrization-dissymmetrization of Shubnikov-Curie method of the differential longitudinal rolling drawing developed are presented. The method is based on the symmetry approach for modeling processes on the basis of the identified relationships between the kinematic factor and the impact that allows to predict the result of processing, and conversely, setting the result, it is possible to design technology