Методи зовнішнього впливу на чавунні виливки для отримання їх диференційованих механічних властивостей

• Дата: 2023
• Автори: Калюжний, Павло, Дорошенко, Володимир
• Формат: Стаття
• Мова: Українська
• Опубліковано: Physico-technological Institute of Metals and Alloys 2023
• Теми: лиття металу; залізовуглецеві сплави; термічна обробка; високоміцний ізотермічно загартований чавун; ізотермічна витримка; загартування; лиття за газифікованими моделями
• Онлайн доступ: https://www.metalsandcasting.com/index.php/mcu/article/view/32
• Назва журналу: Metal and Casting of Ukraine

According to government programs, it is planned to process most of Ukraine's own ore into metal and make finished metal products from it, in particular in the field of mechanical engineering, with a key requirement of localization of production of at least 60 %. At the same time, competitive advantages require materials with high properties and the development of new technologies in foundry for mechanical engineering. New methods of manufacturing cast parts on the examples of high-strength cast iron castings are proposed, mainly when combining the foundry process according to gasified models and heat treatment (HT). These methods allow to create differentiated hardness values on different sides of the casting surface. According to the scientific and technological approach and the conditions of their implementation, it is noted that similar methods are also available for most iron-carbon alloys, as well as for use in foundries with minimal equipment for maintenance. Further studies of such differentiated structure formation are promising in the direction of creating methods of grinding cast microstructure (up to the level of nanostructured materials) and mutual penetration of elements of different phases (up to the level of highentropy alloys) to improve the properties of alloys. For the development of research, the relevance of methods for generating a three-dimensional micromechanical model is indicated. Developed metallurgical methods create an opportunity for selfsharpening of working bodies or tools as they wear out, which increases productivity in extreme conditions, saves resources that lead to the movement of these products, and the cost of sharpening or replacing them. Differentiated hardness values of metal products are also promising for the construction of armored barriers, in which the alternation of solid and plastic layers of a number of plates located at an acute angle to the direction of the external factor of damage, significantly weakens it.