Порівняння чавунних і композиційних з чавунними вставками гальмових колодок для рухомого складу залізниці

• Дата: 2023
• Автори: Мазур, В. Л., Найдек, В. Л., Попов, Є. С.
• Формат: Стаття
• Мова: Українська
• Опубліковано: Physico-technological Institute of Metals and Alloys 2023
• Теми: ливарне виробництво; гальмові колодки; чавун; композиційні матеріали; якість; стандартизація; удосконалення
• Онлайн доступ: https://www.metalsandcasting.com/index.php/mcu/article/view/65
• Назва журналу: Metal and Casting of Ukraine

The performance of brake pads for railway rolling stock made by cast iron and pads made of so-called composite (rubber-asbestos and rubber-asbestos-free) material, including with cast iron inserts or frame, is analyzed. The requirements of technical conditions and standards for brake pads made of cast iron and composite material are compared. The main disadvantage of these regulations is the lack of requirements for the chemical composition of pads made of composite material, regardless of the presence or absence of cast iron inserts. The service life of composite pads with cast iron inserts is determined by the wear resistance of cast iron inserts, because cast iron wears out faster than rubber-composite mixture. The service life of composite pads with cast iron inserts cannot be longer than the service life of fully cast iron pads. Composite pads have a greater tendency to damage the rolling surface of the wheels compared to cast iron pads. Composite brake pads during their operation have a negative environmental impact on the environment due to the formation of smog harmful to humans during the friction of the pads on the wheels of rolling stock. The composite material of brake pads used in Ukraine, Belarus, and Russia cannot be identified in accordance with the regulations in force in the European Union. Despite the future prospects for the use of pads made of polymer, metal-ceramic and other quality materials, cast iron brake pads will be used for a long time to equip the rolling stock of the railway. A promising area for improving the quality of cast iron brake pads is the introduction of technology for their production from partially graphitized cast iron.