Исследование особенностей деформации квадратного подката в овальном калибре при низкотемпературной прокатке
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Дата
2017
ORCID
DOI
Науковий ступінь
Рівень дисертації
Шифр та назва спеціальності
Рада захисту
Установа захисту
Науковий керівник
Члени комітету
Видавець
НТУ "ХПИ"
Анотація
Представлены результаты исследования особенностей формоизменения боковой поверхности квадратного подката в овальном калибре при прокатке в промежуточной группе клетей непрерывного сортового стана. Определена форма боковой поверхности раската и энергосиловые условия прокатки применительно к диапазону величин параметра ld/hср и температур прокатки, использующихся на типовом сортовом стане. Показано, что применительно к условиям низкотемпературной прокатки процесс необходимо вести при значении ld/hср не превышающих 0,981.
The transition to modern energy-saving technologies (to which low-temperature rolling refers) leads to the need to address new issues related to changes in the behavior of surface defects of continuously cast billets during rolling. The formation of the lateral surface of rolled products in transitional calibers is of fundamental importance in terms of the quality of the final metal products. The calculated shape of the lateral surface made it possible to determine the most favorable rolling conditions that would ensure the formation of such a lateral surface, the shape of which would not lead to further defects, such as sunset. On the basis of the previously developed engineering approach to the calculation of metal deformation in the "square-oval" exhaust system for low-temperature rolling conditions, a mathematical model for determining the formation parameters was proposed. The results of a study of the features of the shaping of the lateral surface of a square feed in the oval caliber during rolling in an intermediate group of stands of a continuous section mill are presented. The shape of the lateral surface of the rolling and the energy-power rolling conditions are determined in relation to the range of the parameter values ld / hcr and the rolling temperatures used in a typical sort mill. It is shown that in the case of low-temperature rolling conditions, the process must be carried out at a value ld/hcp not exceeding 0.981.
The transition to modern energy-saving technologies (to which low-temperature rolling refers) leads to the need to address new issues related to changes in the behavior of surface defects of continuously cast billets during rolling. The formation of the lateral surface of rolled products in transitional calibers is of fundamental importance in terms of the quality of the final metal products. The calculated shape of the lateral surface made it possible to determine the most favorable rolling conditions that would ensure the formation of such a lateral surface, the shape of which would not lead to further defects, such as sunset. On the basis of the previously developed engineering approach to the calculation of metal deformation in the "square-oval" exhaust system for low-temperature rolling conditions, a mathematical model for determining the formation parameters was proposed. The results of a study of the features of the shaping of the lateral surface of a square feed in the oval caliber during rolling in an intermediate group of stands of a continuous section mill are presented. The shape of the lateral surface of the rolling and the energy-power rolling conditions are determined in relation to the range of the parameter values ld / hcr and the rolling temperatures used in a typical sort mill. It is shown that in the case of low-temperature rolling conditions, the process must be carried out at a value ld/hcp not exceeding 0.981.
Опис
Ключові слова
стан сортовой, формоизменение, параметры энергосиловые, энергоэффективность, section mill, forming, power parameters, energy efficiency
Бібліографічний опис
Смирнов Е. Н. Исследование особенностей деформации квадратного подката в овальном калибре при низкотемпературной прокатке / Е. Н. Смирнов, В. А. Скляр, В. А. Белевитин // Вісник Нац. техн. ун-ту "ХПІ" : зб. наук. пр. Сер. : Інноваційні технології та обладнання обробки матеріалів у машинобудуванні та металургії = Bulletin of National Technical University "KhPI" : coll. sci. papers. Ser. : Innovative technologies and equipment handling materials in mechanical engineering and metallurgy. – Харків : НТУ "ХПІ", 2017. – № 43 (1265). – С. 59-63.