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The article considers way to increase the microhardness of the surface of tungstenless hard alloy based on titanium carbide with a binding phase of intermetallic titanium nickelide (TiNi). The matrix in solid composite materials must exhibit the capability to arbitrary form making during the deformation process of the composite and to strengthen its positions and good wet particulate, providing a strong bond along the phase boundaries and high density during sintering. The increase of strength properties and hardness of composite materials are achieved by improving the microstructure, repairing defects in their structure, while improving the wetting processes with the binder phase. It was established experimentally that the process of irradiating the surface of polished samples the ions Ar+ and Zr+ with energy about 20 keV and a dose of 1017 ions/cm² of a solid alloy leads to a significant change in the microhardness of the material. It happens due to the formation of quenching point defects occuring during intense heating and cooling of composite samples. Structure formation occurs in extremely non-equilibrium conditions of interaction of the surface of tungstenless alloy with a concentrated energy flow, during the implantation the samples of solid alloys. The data are presented, visually showing that increasing the strength and microhardness is promising way to increase the wear resistance of products intended for earth works related to drilling wells and laying tunnels. [ABSTRACT FROM AUTHOR]

Implementation of new designs of gear pumps with improved engineering specifications is important today. These specifications have both advantages and disadvantages: cyclic variation, relatively large volumetric loss, high operation noise. Gear pump performance and efficiency depend largely on the geometry of parts mating. So, a relevant task now is the definition of various defects in gears that lead to the interface clearance increase as well as internal loss increase of the working fluid, and decrease in performance. Gears of steel 20X2H4A was subjected to gas cementation first, and then to heat treatment. To assess the quality of heat treatment the spectral analysis was carried out, the chemical composition and impact toughness were determined, the microstructure was studied, and the measured hardness and microhardness of samples were changed. [ABSTRACT FROM AUTHOR]