Нові жаростійкі сплави для виготовлення склоформ

• Дата: 2023
• Автори: Устименко, А. І., Лук’яненко, І. В., Ямшинський, М. М., Гурія, І. М., Кивгило, Б. В.
• Формат: Стаття
• Мова: Ukrainian
• Опубліковано: National Academy of Sciences of Ukraine, Physical-Technological Institute of Metals and Alloys of NAS of Ukraine 2023
• Теми: жаростійкий чавун; хімічний склад; термостійкість; форма графіту; структура; термоциклювання
• Онлайн доступ: https://plit-periodical.org.ua/index.php/plit/article/view/new-heat-resistant-alloys-manufacture-glass-molds
• Назва журналу: Casting Processes

УДК 621.745.55 Glass production refers to the branch of industry that produces construction and technical, container, chemical and laboratory and other types of glass. A significant specific weight in the turnover of goods is occupied by glass containers. The glass container market will remain promising and further growth in its consumption will be observed. To date, unfortunately, there is no universal scheme capable of significantly increasing the working life of glass mold parts. This situation creates new approaches and methods for solving the problems of improving the structure of the material of cast glass molds, reducing the cost of their production and increasing the service life of products. The most common chemical compositions of foreign and domestic heat-resistant cast irons for glass molds are analyzed today. Based on this, the greatest interest is cast iron alloyed with silicon with the subsequent formation of the necessary structure in the cast state using Fe-C-Si dosage of modified cast iron with microdosing of alloying elements. Cast irons were additionally microalloyed with Mo, Cr, Ti, Al and V. It was established that molybdenum and chromium contribute to the grinding of the primary grain. It was established that part of the carbon is spent on the formation of a solid solution doped with molybdenum and chromium, which causes the grinding of graphite inclusions. Microalloying with titanium and aluminum does not contribute to the grinding of graphite inclusions due to an increase in the ferrite component in the structure. As a result of the carbide-forming action of microalloying elements, a decrease in the number of graphite inclusions was established. According to the research results, it was established that the heat resistance of the alloy is a function of the entire complex of properties: mechanical, physical, physico-chemical and technological. In order to achieve high performance properties of mold sets, it is necessary to take into account all factors, including following the rules of design and development of heat-resistant casting manufacturing technology.   References 1. Leushin I.O. (2013). Thermophysical parameters of operation of parts of cast-iron glassforms. Foundry, 1(13), 50-52 [in Russsian].2. Leushin I.O. (2013). Influence of structure formation and phase composition of cast iron castings of glass forms on the operational properties of finished products. Ferrous metallurgy, 5, 19-23 [in Russsian].3. Popov V.M. (1991). Thermal stability of cast irons with different forms of graphite. Foundry, 2, 34 [in Russsian].4. Leushin I.O., Alekseeva R. E. (2014). Improving the operational stability of parts of cast-iron glass molds by improving the technology of their manufacture and control. Proceedings of the Nizhny Novgorod State University. 1(103), 212-224 [in Russsian].5. Aleksandrov M.V. (2013). Development of chemical compositions and technologies for obtaining low-alloyed heat-resistant cast iron for glass-form parts: author. dis. on the science. steps of cand. tech. Sciences: spec. 05.16.04 "Foundry" [in Russsian].6. Leushin I. O., Bauman N. E. (2015). Influence of the structure of cast iron on the formation of operational defects in glass-forming equipment. Science and Education MSTU im. 11, 111–123 [in Russsian].7 Loper C. R. Jr. (2008). Structure of Spheroidal Graphite in Cast Iron. American Foundry Society, 08-066 (05), P. 1–10.8. Todorov P. P. (1974). Structure and properties of malleable cast iron. Moscow: Mechanical Engineering, 159 [in Russsian].9. Aleksandrov M. V. (2013). Improving the efficiency of modifying cast iron for castings of glass forms by intensifying the process of graphite formation. Foundry of Russia, 5, pp.19-21 [in Russsian].10. Aleksandrov M. V. (2012). Influence of the chemical composition and microstructure of cast iron castings on the heat resistance of glass mold parts. Foundry, 8, pp. 15-19 [in Russsian].11. Topoljanskij P.A. (2009). Increased service life of mold sets in the conditions of glass container factories. Glass container, 3, 14-18 [in Russsian].12. Naydek V. L. (2011). On the Theories of Graphite Formation in Iron. Key Engineering Materials, Vol. 457, 48–51.13. Bobro Ju.G. (1976). Alloyed cast iron. Moscow: Metallurgy 288 c. [in Russsian].