ТОНКОСТІННІ ВИЛИВКИ З ВИСОКОМІЦНОГО ЧАВУНУ ЗА МОДЕЛЯМИ, ЩО ГАЗИФІКУЮТЬСЯ: Procesi littâ, 2023, Vol 4 (154), 69-77

• Дата: 2023
• Автори: Дорошенко, В.C., Ладарєва, Ю.Ю., Клименко, С.І.
• Формат: Стаття
• Мова: Ukrainian
• Опубліковано: National Academy of Sciences of Ukraine, Physical-Technological Institute of Metals and Alloys of NAS of Ukraine 2023
• Теми: лиття за моделями; що газифікуються; високоміцний чавун; тонкостінні виливки; ізотермічно загартований чавун; діаграма Ішікави
• Онлайн доступ: https://plit-periodical.org.ua/index.php/plit/article/view/224
• Назва журналу: Casting Processes

The article provides an overview of research on the production of thin-walled ductile iron (TWDI) and argues for the prospects of its production by the Lost Foam Casting (LFS) process. As the demand for lightweight metal products continues and even increases, DI and isothermally hardened ADI are increasingly being considered. The old recommendations regarding the minimum thicknessof the DI cast wall are no longer appropriate, since various technological options for obtaining small DI thicknesses have become available depending on the design requirements and in view of new research results on metal smelting and processing, forming technologies and their potential influence on the production of thin-walled products. The mechanism of interaction of the vacuumedsand mold on the metal being poured is considered, and the effect of vacuum on the fluidity of the melt and the prevention of defects from the formation of carbides in the DI structure is described. Since LFC process can provide higher accuracy (tolerances) of castings, has the ability to prevent cast iron bleaching due to the specific influence of mold vacuum, low thermal conductivity of sand and the main atmosphere in contact with molten metal, the LFC process, based on the combination of these factors, has advantages for the production of microwave ovens over other foundry processes. An example is shown that thin-walled castings made from TWDI and TWADI can be lighter and have better mechanical properties than those made from aluminum alloy. Such cast irons have significant potential to replace aluminum alloy parts in various applications, especially those with high mechanical requirements, and such replacement can bring significant savings. The spread of microwave technology is also based on a thorough study of the influence of various technological parameters on the quality of DI castings with given operational characteristics. The Ishikawa diagram was used to determine the array of such information in its quantitative by types of constituent processes and qualitative composition by degree and nature of influence.