Abstract
Considerable reserves of improvement of steel quality and reduction of costs of its production are concealed in a possibility of active and purposeful formation their structure and the properties by introduction into the melt modifiers, alloying and microalloying additives. Due to the task of decreasing costs, studies on alloying and modifying of metal by natural and man-caused materials are very actual. Thermodynamic regularities of steel alloying and modifying processes by natural and man-caused materials, including manganese ores of various structures, BOF vanadium slag, barium- strontium modifier, obtained from the complex ores containing barium and strontium considered. Possibilities of wide application of various structure manganese ores for steel alloying by manganese without use of standard manganese alloys as well as vanadium slag for microalloying by vanadium demonstrated. Metallurgical properties barium-strontium natural modifier obtained and the possible mechanism of the modifying impact of barium and strontium on quality of metal studied. It was determined, that the effect of modifying by barium can revealed in steels, deoxidized only by silicon, and for modifying by strontium or joint modifying by barium and strontium it is necessary to apply aluminum as deoxidizing agent. Industrial testing of the above-stated materials showed reliability of studies, accomplished at thermodynamic modeling and laboratory studies of calculations and conclusions. Recommendations on optimization of technologies of steel alloying and modifying made. It was proved that use of the materials of the study allows to improve technical and economic indices of the process of production of steels and to increase considerably quality of final steel products. Conclusions on significant expansion of natural and man-caused materials prospects worded.
Highlights
Значительные резервы повышения качества металла заложены в возможности активного и целенаправленного формирования их структуры и свойств путем введения в расплав модификаторов, легирующих и микролегирующих добавок
Considerable reserves of improvement of steel quality and reduction of costs of its production are concealed in a possibility
Possibilities of wide application of various structure manganese ores for steel alloying by manganese without use
Summary
Наук, профессор кафедры металлургии черных металлов; В. Наук, доцент кафедры металлургии черных металлов; И. Рассмотрены термодинамические закономерности процессов легирования и модифицирования стали природными и техногенными материалами, включая марганцевые руды различного состава, конвертерный ванадиевый шлак, барий-стронциевый модификатор, полученный из комплексных руд, содержащих барий и стронций. Показаны возможности широкого применения различных по составу марганцевых руд для легирования стали марганцем без использования стандартных марганцевых сплавов и ванадиевого шлака для микролегирования ванадием. Даны рекомендации по оптимизации технологий легирования и модифицирования стали. Ключевые слова: модифицирование и микролегирование стали, природные и техногенные материалы, марганцевые руды, конвертерный ванадиевый шлак, барий-стронциевый модификатор, термодинамическое моделирование. Ссылка для цитирования: Нохрина О.И., Рожихина И.Д., Дмитриенко В.И., Прошунин И.Е., Голодова М.А. Особенности применения природных и техногенных материалов для легирования и модифицирования стали // Черная металлургия.
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