Новий метод ком′ютерного термічного експрес-аналізу якості рідких чавунів з прогнозом мікроструктури та службових властивостей виливків при кімнатних температурах: Processy litʹâ, 2019, Tom 135, №3, p.46-58

• Дата: 2019
• Автори: Захарченко, Е. В., Бурбелко*, А. А., Сіренко, О. А., Гончаров, А. Л., Богдан, А. В., Кавалець*, М.
• Формат: Стаття
• Мова: Ukrainian
• Опубліковано: National Academy of Sciences of Ukraine, Physical-Technological Institute of Metals and Alloys of NAS of Ukraine 2019
• Теми: комп'ютерний метод термічного експрес-аналізу якості рідких чавунів; передбачення властивостей і мікроструктури виливків при кімнатних температурах; референсні криві охолодження (РКО); сталеві стаканчики-пробовідбірники занурення
• Онлайн доступ: https://plit-periodical.org.ua/index.php/plit/article/view/134
• Назва журналу: Casting Processes

Received 14.03.2019 UDK 621.745.5.06/07:536.5 The results of the development and verification of a new computer-based method of thermal express-analysis of the quality of liquid iron for the prediction of the microstructure and properties of castings at room temperature using reference cooling curves for which the properties of interest are determined in advance are presented. The method has been successfully tested in laboratory and experimental conditions on gray and white cast irons smelted in high-frequency and mid-frequency induction furnaces. The new method uses environmentally friendly steel thin-walled immersion cups samplers with heat-resistant coating inside and outside instead of environmentally harmful and less efficient sand-resin cups. The basic features of the new method are: universality; selfadaptability; rapidity; relative simplicity; high sensitivity to metallurgical prehistory of cast iron melts. The actual data obtained by the new express thermal analysis method are used to monitor on-line and analyze the quality of the melt using a set of microstructure indicators at room temperatures. If the microstructure meets the requirements of the relevant standards and / or the agreed terms of the supply contract, then the command is given to fill the molds. If the microstructure of the cast iron is unsatisfactory, the filling of the casting molds is immediately terminated in order to carry out corrective processing of the melt in a smelting furnace or ladle. Corrective processing is implemented in the form of a technological operation of modification or modification together with inoculation. The method of corrective treatment is determined by the type of the actual microstructure obtained by the express method TDA. The decision is made by the technologist or master of the casting site independently at his own responsibility based on past experience or using an automated computer advisor.