IMPROVING THE PERFORMANCE OF DIAMOND GRINDING TOOL BY MODIFYING THE SYNTHETIC DIAMOND SURFACES

Introduction. Machine -building enterprises of Ukraine need a highly effi cient diamond grinding tool. For its effec- tive use, it is necessary to use high -quality synthetic diamond powders with improved operational characteristics. Problem Statement. Among the disadvantages of synthetic diamonds used in grinding tools is their oxidation under high temperature, during high-performance grinding of modern hard -to -machine materials. Purpose. The purpose of this research is to study the possibilities of improving the operational characteristics of the diamond grinding tool by modifying the surface of synthetic diamond grains. Material and Methods. The surface of AC6-AC20 diamond powder has been modified by the isothermal method of liquid -phase deposition of heat -resistant oxides (B2O3, Al2O3), chlorides (CaCl2, NaCl, MgCl2, FeCl3), and their mixes (B2O3 + CaCl2, B2O3 + NaCl) from saturated solutions on the diamond surface. Results. The basic technology of forming heat -stable wear -resistant coatings on the surface of diamond grinding powder grains from mixes of soluble and insoluble oxygen- (B2O3, TiO2, SiO2, Al2O3, TiO, CaO, ZnO, CeO2, SnO2), silicate- (Na2O(SiO2)n), (K2O(SiO2)n) and carbide -containing (SiC, TiC, B4C) compounds in various combinations. It has been found that the modification allows reducing the costs of diamonds in grinding wheels,