Application of secondary carbide powders for restoration and hardening of parts

Abstract

Attention in this work is paid to the technology of obtaining powder materials from waste metals and alloys by the method of electroerosive dispersion and subsequent deposition of wear-resistant coatings. At present, it is important to look for new materials for the repair and restoration of parts of various equipment. Recycling of metal waste using electroerosive dispersion will reduce the cost of such materials. The most common way to restore parts is plasma-powder surfacing. In this case, the physical and technological parameters of the metal powders used are of particular importance. In the presented work, the expediency and relevance of the use of recycled powder materials in the technologies for the restoration and hardening of parts by the method of plasma-powder surfacing is proved. (Research purpose) Increasing the resource of parts of various equipment, restored and hardened with hard-alloy powder materials obtained by recycling waste from machinebuilding industries by the method of electroerosive dispersion. (Materials and methods) The work was carried out at the laboratory-experimental base of the Central Collective Use Center "Nano-Center" FGBNU FNATS VIM. To conduct research, a powder of the T15K6 brand was obtained from the waste of hard-alloy plates by the method of electroerosive dispersion. The following equipment was used: a pulse generator for electrospark processing of modes. Elitron-52B, Niton XL3t GOLDD + X-ray fluorescence spectrometer, set of sieves, ShS-80-01 SPU drying cabinet, Acculab ALC-210d4 analytical balance. (Results and discussions) Investigations were carried out on the elemental composition of the powders used, as well as the physical and mechanical properties of the coatings obtained on their basis by plasma-powder surfacing. (Conclusions) Studies have shown the rationality of using secondary hard-alloy powder materials in the technologies of plasma-powder surfacing in the restoration and hardening of parts. The hardness of the resulting coatings is much higher than the initial hardness of worn parts.