Optimization of the Process of Obtaining an Electroerosive Charge of Bronze BRS30 for the Production of Sintered Bronze Alloys Based on it

Purpose. Optimization of the process of obtaining an electroerosive charge of BrS30 bronze for the production of sintered bronze alloys based on it.

Methods. To obtain experimental powder materials (charge), an installation was used to obtain nanodispersed powders from conductive materials, waste of lead bronze alloy BrS30 in the form of shavings (GOST 493-79), working liquids carbon- (lighting kerosene, GOST 11128 -65) and oxygen-containing (distilled water GOST 6709-72). Dimensional analysis of electroerosive materials obtained from BrS30 lead bronze wastes was carried out on an Analysette 22 NanoTec laser particle size analyzer. The determination of the optimal operating parameters of the EED unit was carried out by setting up a full factorial experiment (FFE) on the average particle size of the resulting electroerosive materials.

Results. In the course of the calculations, the limiting values of the optimization parameter (average size of electroerosive particles) were determined, which amounted to: for water ‒ 44.19 microns with a capacity of 65.5 microfarad discharge capacitors, a voltage on the electrodes of 200 V, a pulse repetition rate of 200 Hz; for kerosene ‒ 53.88 microns with a capacity of the discharge capacitors of 65.5 microfarads, a voltage on the electrodes of 200 V, a pulse repetition rate of 200 Hz.

Conclusion. Based on the presented research results and calculations. it can be concluded that the average particle size obtained in lighting kerosene is 1.2 times higher than the average particle size obtained in distilled water, and is 44.19 μm and 53.88 μm, respectively, which is associated with large energy losses electric discharge on the breakdown of the working fluid due to the difference in the dielectric constant of water and kerosene.

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