Study of the Possibility of Increasing the Plasticity of Tungsten Wire at Normal Temperatures by Optimizing the Drawing Technology

Abstract

Purpose. The development of a mathematical model for the process of drawing a tungsten-thorium wire for the analysis of the influence of technological factors of the specified process on the plasticity of the material and the recommendations on how to choose their optimal values, from the point of view reaching the plasticity of the wire at the maximum productivity of the wire drawing process.
 Research methods. The problem of creating a mathematical model for investigating the influnce of technological parameters into the process of drawing on the plasticity of a tungsten-thorium rod was considered to be based on the theory of experiment, in particular the method of experiment planning. Various material samples were prepared using methods of powder metallurgy and pressure treatment, in particular wire drawing. Experiments were carried out in real production conditions using industrial equipment. The plasticity of the tungsten-thorium rod was determined by torsion testing using the K-5 machine.
 Results. A mathematical model has been created that adequately describes the impact of technological factors on the plasticity of tungsten wire, which allows thoroughly analyze the physical processes that occur during wire drawing, and, if necessary, correct regimes without conducting a large number of physical experiments.
 Scientific novelty. The mathematical model has been proposed as it allows to analyze the impact of technological factors of drawing process on plasticity of tungsten-thorium wire produced at real manufacturing.
 Practical value. It can be useful for the technologists for higher productive application of industrial equipment and decrease of expenses for production of experiment consignment.