Authors: Yu.M. Vernigorov, V.A. Lebedev, G.V. Demin

Title of the article: Magnetic vibrating layer in the technology of dispersed magnetic materials

Year: 2020, Issue: 4, Pages: 30-35

Branch of knowledge: 05.02.09 Technologies and machines for pressure working

Index UDK: 621.762

DOI: 10.26730/1999-4125-2020-4-30-35

Abstract: Attempts to intensify the processes of obtaining powders with a certain success have been implemented in installations with an air-boiling layer, chemical coating with ultrasound, annealing in a vibro-boiling layer, and so on. The task of such technological techniques is to obtain the maximum porosity of particles by fluidizing freely poured particles to intensify the processes. The main parameter limiting the applicability of a particular method in powder technologies is the particle size. For example, when using powders with a size of 0.5 - 5 microns, these methods are not effective. Another limiting factor is temperature. Thus, chemical-thermal treatment of iron powders in a vibrating layer is effective up to temperatures of the order of 500 ℃. At higher temperatures, the vibration layer of the powder abruptly changes its rheological properties leading to vibration compaction and, as a result, to the process blocking. The use of additives in the cladding technology in the form of powders of crystallohydrates of alloying metal salts further reduces the effective temperature, and the presence of the liquid phase leads to the formation of dense granules and pellets. This requires the creation of installations that allow you to change the parameters of the vibration process (frequency, amplitude, direction of vibrations) during the cycle, which is not always technologically justified. Purpose of work is analysis of the possibilities of technological processes in the powder metallurgy of ferromagnetic materials based on the formation of a magnetovibrating layer in an electromagnetic field.

Key words: vibro-boiling layer fluidization magnetovibrating layer magnetic field pressing

Receiving date: 27.07.2020

Publication date: 30.10.2020

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