Open AccessSTUDY OF CHANGES IN THE COMPOSITION OF OXIDE NON-METALLIC INCLUSIONS AT THE STAGES OF THE METALLURGICAL PROCESS
Author(s) -
Г. В. Бабин,
Д. В. Руцкий,
N. A. Zyuban,
M. V. Kirilichev,
Anton Agarkov
Publication year - 2020
Publication title -
izvestiâ volgogradskogo gosudarstvennogo tehničeskogo universiteta
Language(s) - English
Resource type - Journals
ISSN - 1990-5297
DOI - 10.35211/1990-5297-2020-4-239-52-58
Subject(s) - metallurgy , non metallic inclusions , materials science , slag (welding) , oxide , corundum , smelting , metal , chromite , chemical composition , continuous casting , chemistry , organic chemistry
Using optical and electron microscopy methods, a study was made of the contamination of C45E carbon steel with non-metallic inclusions in samples taken at all stages of the metallurgical process, and the chemical compositions of non-metallic inclusions were determined. Smelting was carried out according to the following technology: production of an intermediate in an arc steel-smelting furnace → melt processing at out-of-furnace processing →vacuum treatment of steel → continuous casting. Using the methods of recalculation of the EDS-spectrum data, using the Thermocalc software, the phase compositions of non-metallic inclusions of metal samples determined at each stage of the metallurgical process are determined. It was found that complex oxide inclusions with a slag composition are increase in size with each subsequent step and are completely removed from the metal by the final stages of the treatment. At the same time, inclusions of calcium aluminates, on the contrary, decrease in size and, with inclusions of corundum, which remain almost unchanged throughout the treatment, are the main type of oxide that enters the finished metal.