Abstract
Currently, a large number of different methods for producing metal powders are known. Most of them use ready-made raw materials and semi- finished products made from the source ore, which leads to an increase in the cost of the resulting product, so the issues of recycling of machine-produced waste become relevant. One of the most promising and energy-efficient methods of obtaining powders from any conductive materials is electroerosive dispersion. This method makes it possible to process metal waste and obtain raw materials for technologies for the restoration and hardening of agricultural machinery parts, gives a tangible economic effect. (Research purpose) The research purpose is to consider various methods of obtaining metal powders and to determine the most promising and technologically advanced of them for the restoration and hardening of parts; to justify the feasibility of processing machine-produced waste into powder material as an important resource-saving factor. (Materials and methods) The study uses literature sources, fundamental laws of physics and chemistry, basic laws of metallurgy, used a laboratory installation for electroerosive dispersion. (Results and discussion). The article describes the main methods of obtaining metal powders: mechanical, chemical, as well as a promising method of electroerosive dispersion. The method of electroerosive dispersion is considered the most promising method for obtaining metal powders. This method makes it possible to obtain powders from metal waste from machine- producing industries, suitable for reuse in technologies for the restoration and hardening of machine parts of agricultural machinery by iron, various types of surfacing and electric spark alloying. (Conclusions) Powder metallurgy provides valuable raw materials for the technologies of restoration and hardening of parts. In order to save money, it is advisable to obtaining metal powders from machine- produced waste. The method of electroerosive dispersion is characterized by relatively low energy costs and environmental cleanliness of the process.
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