Зовнішня термосилова дія як чинник управління формуванням структури литих заготівок: Processy litʹâ, 2019, Tom 136, №4, p.11-19

• Date: 2019
• Main Authors: Нурадінов, А. С., Ноговіцин, О. В., Нурадінов, І. А., Зубеніна, Н. Ф.
• Format: Article
• Language: Ukrainian
• Published: National Academy of Sciences of Ukraine, Physical-Technological Institute of Metals and Alloys of NAS of Ukraine 2019
• Subjects: розплав; кристалізація; перегрів; час витримки; переохолодження; швидкість розігріву та охолодження; вібрація; структура; дисперсність
• Online Access: https://plit-periodical.org.ua/index.php/plit/article/view/125
• Journal Title: Casting Processes

Received 07.05.2019 UDK 621.74:531.5 High temperature overheating of the molten metal is one of the main reasons for the formation of a coarse-grained crystalline structure of the casting. Therefore, to ensure the formation of a favorable structure and properties of the cast metal, this factor must be taken into account. In this work, the complex influence of various external factors (overheating temperature, cooling intensity and vibration) on the formation of the model alloy structure was studied using the method of physical modeling. It has been established that the negative effect of large overheating on the dispersity of the dendritic structure can be practically leveled out by adjusting the intensity of the heat sink, namely supercooling and the rate of crystallization. In addition, experimentally proved the high efficiency of vibration treatment of hardened alloys to form a favorable structure of cast billets. It was found that, regardless of the level of overheating of the melt and the intensity of the heat sink, vibration ensures the formation of a dispersed dendritic structure during solidification of metal alloys.