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Properties of the Surface Layer after High-Energy Treatment by Powder Particles

  • THEORY AND PROCESSES OF FORMING AND SINTERING OF POWDER MATERIALS
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Abstract

Experiments on the high-energy surface treatment of a substrate made of St.3 structural steel by the flow of particles of tungsten, nickel, and titanium nitride particles are performed. The collision pressure of the particles accelerated by the explosion energy on a steel target is evaluated using the momentum conservation equation and linear equation of the impact adiabat of the particle material. It is established that the collision pressure is, GPa, 62 for the tungsten particle, 48 for the nickel particle, and 41 for the titanium nitride particle. The particle heating temperature with the collision with the surface of a steel target is calculated allowing for conservation conditions of the mass and momentum on the shock-wave front. The maximal particle heating temperature in their collision place with the substrate surface (at a particle velocity of 2000 m/s) is, K, 1103 for the tungsten particles, 755 for the nickel particles, and 589 for the titanium nitride particles. It is shown that hardness of a steel target increases after its high-energy treatment by the particle flow. Maximal hardening of the surface layer of a steel target when compared with initial microhardness increases 32–55% and is observed at a depth of 2–4 mm from the treatment surface. Then it decreases to the microhardness of the initial material (170 HV) at a distance of 15–20 mm from the treated surface.

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Correspondence to E. V. Petrov, I. V. Saikov, G. R. Saikova or V. S. Trofimov.

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Translated by N. Korovin

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Petrov, E.V., Saikov, I.V., Saikova, G.R. et al. Properties of the Surface Layer after High-Energy Treatment by Powder Particles. Russ. J. Non-ferrous Metals 61, 549–553 (2020). https://doi.org/10.3103/S1067821220050120

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  • DOI: https://doi.org/10.3103/S1067821220050120

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