The Influence of Technological Modes of Forming the Surface, Close to Juvenile and Ultrafine Powders with a High-Speed Method in a Cryogenic Environment
- Authors: Titov Y.V.1, Kamenov R.U.1, Belan D.1, Zinkin A.I.1
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Affiliations:
- Issue: Vol 20, No 3 (2018)
- Pages: 58-71
- Section: MATERIAL SCIENCE
- URL: https://bakhtiniada.ru/1994-6309/article/view/302079
- DOI: https://doi.org/10.17212/1994-6309-2018-20.3-58-71
- ID: 302079
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Abstract
Introduction. The paper describes the research results of technological modes for high-speed processing of billets with the aim of obtaining juvenile surfaces and ultrafine powders. Methods of research. As technological factors, the presence/absence of liquid nitrogen in the treatment zone, the rate of revolution of grinding disk, the longitudinal feed, the characteristics of the abrasive tool, and the physical and mechanical characteristics of the materials being processed are taken. As response functions, when considering the influence of technological factors, foreign impurities are taken on the treated surface, the particle size of the powder and the wear of the abrasive tool. All the studies were carried out on the following materials: sintered-hard alloy VK-8, tool steel R-18, brass L63, aluminum alloy D16, ferromagnet M2500NMC1 and neodymium magnet N45M. A scanning electronic microscope Jeol JSM-5700 was used in the studies. The method of planning a two-factor experiment was used to obtain the ratio connecting the size of powder particles with technological factors. Results and discussion. The presence of liquid nitrogen in the processing area allows keeping the surface clean, preventing its oxidation and the appearance of abrasive wear products on it. The processing of viscous materials becomes possible only with the use of liquid nitrogen. The dispersion of the billet at grinding disc rate of revolution higher than 100 m/s leads to a sharp decrease in the particle size of the resulting powder. The use of a feed of less than 1 mm/min in the processing of billets is optimal in terms of the particle size of the powder obtained and the wear of the abrasive tool. The tensile strength of materials is the only parameter considered by physicomechanical characteristics of materials that affects the particle size.
About the authors
Y. V. Titov
Email: tyrin-88@mail.ru
Assistant; Omsk State Technical University, 11 Mira ave., Omsk, 644050, Russian Federation; tyrin-88@mail.ru
R. U. Kamenov
Email: renatkamenov@mail.ru
Omsk State Technical University, 11 Mira ave., Omsk, 644050, Russian Federation; renatkamenov@mail.ru
D. Belan
Email: Baltazar.13@mail.ru
Ph.D. (Engineering), Associate Professor; Omsk State Transport University, 35 Prospekt Marksa, Omsk, 644046, Russian Federation; Baltazar.13@mail.ru
A. I. Zinkin
Email: az@sibtmk.ru
LLC "SibTochMash", 55 (build. 2) Mira ave., Omsk, 644077, Russian Federation; az@sibtmk.ru
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