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.
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