Analysis of wear resistance of samples obtained by selective fusion of electroerosive Titanium powders

The purpose of this work was to study the wear resistance of samples obtained by selective fusion of electroerosive titanium powders produced by processing Titanium metal alloys of the VT20 brand.

Methods. The following equipment was used during the research: a plant for producing electroerosive Titanium powders original patented; raw materials for producing Titanium powders VT20 alloy; 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 Titanium powders produced by processing metal waste, the following was established: the coefficient of friction of the surface of the sample under study ranges from 0.126 to 0.435; the amount of volumetric wear is 4.972 mm3x10-5. Experimentally, a jump in the coefficient of friction was 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 hard surfaces of the sample. It has been experimentally established that in a contacting pair a Titanium sample and a counterbody both touching surfaces wear out almost uniformly. At the same time, the width of the wear plate of the test sample ranged from 1.23 to 1.28 mm. The relatively high wear resistance of the studied sample, obtained by selective fusion of electroerosion titanium powders, was facilitated by a porous defect-free structure and a relatively small grain size.

Conclusion. The data obtained will make it possible to select the most rational area of practical application of the new additive material.

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