Analysis of wear resistance of samples obtained by selective fusion of electroerosive Iron-Chromium-Nickel powders

The purpose of this work was to study the wear resistance of samples obtained by selective fusion of electroerosive Iron-Chromium-Nickel powders produced by processing metal waste. Methods. During the research, the following equipment was used: a plant for producing electroerosion Iron-Chromium– Nickel powders – original patented; raw materials for producing Iron–Chromium–Nickel powders alloy grade 20X25H20X2; working fluid isopropyl alcohol; a plant for selective alloying original patented; equipment for studying the wear resistance parameters of an additive sample – automated friction machine Tribometer, CSM Instruments. The material of the counterbody is Stainless Steel AISI 420. Results . As part of the task aimed at studying the wear resistance of samples obtained by selective fusion of electroerosive Chromium-Nickel iron powders produced by processing metal waste, the following has been established: the coefficient of friction of the surface of the sample under study ranges from 0.256 to 0.634; the amount of volumetric wear is 1.116 x10-5 mm3. A jump in the coefficient of friction has been experimentally established at the initial moment of tribological testing of the sample, which is associated with relatively high roughness and wear characterized by smoothing of the solid protrusions of the sample surface. It has been experimentally established that in a contacting pair, an Iron–Chromium-Nickel sample and a counterbody, both contacting surfaces wear out almost uniformly. At the same time, the width of the wear track of the test sample was about 270 microns. The relatively high wear resistance of the studied sample, obtained by selective fusion of electroerosive Iron-Chromium-Nickel powders, was facilitated by a porous defect-free structure and a relatively small grain size. Conclusion. The data obtained will allow us to select the most rational area of practical application of the new additive material.