ИССЛЕДОВАНИЕ ПРОЦЕССА СТРУКТУРООБРАЗОВАНИЯ И ИЗНОСОСТОЙКОСТИ АБРАЗИВНЫХ ИНСТРУМЕНТОВ НА МЕТАЛЛИЧЕСКОЙ СВЯЗКЕ СОСТАВА 51%Fe+9%Ni+32%Cu+8%Sn, ИЗГОТОВЛЕННЫХ ИЗ МЕТАЛЛИЗИРОВАННЫХ ТИТАНОМ АЛМАЗНЫХ ПОРОШКОВ

Abstract

The process of of structure formation and wear resistance of abrasive tools on the metal bond of composition 51%Fe+9%Ni+32%Cu+8%Sn made from metallized by titanium diamond powders is investigated. The metallographical substantiation is introduced, as well as the wear-resistance and the working capability of abrasive tools are studied. It is shown that the structure is heterophase and consists of five phases, the first of which is a solid solution based on nickel, the second is a solid solution of tin, nickel, and iron in copper, the third is a solid solution of nickel, copper and tin in iron, the fourth and the fifth are intermetallic compounds with a defective structure. It is revealed that in the developed composite material, the volume content of heavy components is approximately 63%, the plastic component occupies approximately 25% of the sample volume, and the intermetallic phases - approximately 12% of the total volume, which are distributed over the entire sample surface. Based on the results of the complex investigation of the operability and wear resistance of diamond tools manufactured according to the developed technology carried out in the laboratory and production conditions for processing non-metallic materials, the optimal modes of manufacturing highly productive and wear-resistant diamond-metal abrasive tools were selected and substantiated: cold pressing pressure P = 600 MPa, free sintering temperature: T = 850°C, holding at this temperature: τ = 45 min. Applying the developed technology as a method for producing a diamond tool ensures the high efficiency of production.