Increasing the hardness and wear resistance of tungstenless hard alloy working under the abrasive wear and dynamic loads

摘要

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 10~(17) ions/cm~2 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.