Numerical optimization of the sintering process of dispersed electroerosion particles of the alloy VNZh 95

In this paper, the optimal parameters of the process of obtaining a heavy tungsten alloy by spark plasma sintering of the particles of the alloy VNZh 95 on the microhardness of the sintered samples are determined by conducting a full factorial experiment of the type. The operating parameters of the spark plasma sintering unit were selected as factors: temperature, pressure, and holding time, min. The optimal parameters of the installation operation were determined for the electroerosive material VZH 95, previously obtained in two working media: distilled water and lighting kerosene. According to a series of experiments to determine the maximum value of the optimization parameter Y (microhardness), which amounted to: for samples obtained from particles dispersed in water — $3498,6$ MPa at $T = 1050^\circ$C, a pressure of $P = 40$ MPa and holding time $t =10$ min; for samples obtained from particles dispersed in kerosene — $2449,2$ MPa at a temperature $T = 1200^\circ$C, $P = 40$ MPa and holding time $t = 5$ min. The results of experimental studies of the composition, structure, and properties of heavy tungsten alloys made of electroerosion-dispersed particles of the VNJ 95 alloy obtained under optimal conditions are presented below.