RESEARCH ON THE INFLUENCE OF METHODS OF OBTAINING ABRASIVE DIAMOND POWDER ON ITS PHYSICAL AND MECHANICAL CHARACTERISTICS

Abstract

The work is devoted to the establishment and comparative analysis of the physical and mechanical characteristics of the products of the separation of diamond powder in a magnetic field and the products of the separation of GB of powder flotation. Attention is paid to the powders of grades AS15 with grain size 200/160, AS20 with grain size 160/125, AS20 with grain size 100/80. The research was carried out with the help of methods developed at the Institute of Informatics named after V.M. Bakula It has been established that the use of methods for obtaining diamond powder, which involve separation in a magnetic field and preparation of the powder for distribution, with preliminary treatment of the powder with ultrasonic waves or with preliminary thermochemical treatment of the powder, creates conditions for efficient distribution of the powder into products that differ in strength , surface defects, have an increased level of uniformity in terms of strength and magnetic properties. It was established that the use of powder surface preparation due to treatment with high-voltage electric discharges during the manufacture of powders and the use of powder flotation separation allows to obtain a powder characterized by an increased strength index under static compression by 23.8%, increased homogeneity in strength by 25.0%, and also with a significantly reduced number of inclusions, obtain powders that are more homogeneous in terms of morphometric characteristics, which have a greater number of cutting edges and a greater angle of their sharpening, which provides a higher abrasive capacity. The results of research on the influence of multivariate methods of complex sequential application of the processes of preparation and separation of the powder into fractions led to the improvement of the physical and mechanical characteristics of the powder