RESEARCH OF THE INFLUENCE OF THE ABRASIVE COMPONENT OF EXPERIMENTAL CDM INSERTS FOR A ROCK-DESTROYING TOOL ON THE CHARACTERISTICS OF ROCK DESTRUCTION PRODUCTS

Abstract

The results of studying the effect of the structure of a composite diamond-containing material (KAM) on a metal bond, obtained by the method of resistive electric sintering under a pressure of up to 400 MPa, on the intensity of its wear when turning sandstone from the Torez deposit are presented. Tests of KAM elements for wear resistance of diamond-containing functional elements with different degrees of reinforcement with diamond powder were carried out on an experimental stand. The sludge was investigated by particle size analysis, chemical gravimetric method, magnetic fractional analysis, system-analogue method. The elemental composition of the products of destruction of rocks has been determined. It has been established that a decrease in grain size and concentration leads to a decrease in the average size of sludge particles; sludge element composition – Si, Cl, K, Ca, Ti, Fe, Ni, Zn, Sn, Zr. The total content of Ni and Sn varies in the range from 0.048 to 0.741 vol.%. The specific magnetic susceptibility of the cuttings varies in the range (1.81–72.57) · 10-8 m3 / kg. The influence of changes in the concentration and grain size of the reinforcing component correlates with changes in the magnetofractional and elemental composition and the intensity of bond wear. This fact provides a basis for the development of a method for assessing the wear resistance of a composite diamond-containing material with a different degree of reinforcement of its working surface, taking into account changes in the chemical composition of the sludge.