РОЗХІДНИЙ МАТЕРІАЛ ДЛЯ ТЕРМОПЛАСТИЧНОГО 3D ДРУКУ ТВЕРДОСПЛАВНИХ ЗАГОТОВОК

• Дата: 2022
• Автори: Матвійчук, O. O., Пащенко, Є. О., Бондаренко, В.П., Євдокимова, O. B., Юрчук, M. O., Гнатенко, I. O., Барановський, О. М.
• Формат: Стаття
• Мова: Ukrainian
• Опубліковано: Институт сверхтвердых материалов им. В. Н. Бакуля Национальной академии наук Украины 2022
• Теми: Тверді сплави; 3D друк; високонаповнені полімери; адитивне виробництво
• Онлайн доступ: http://altis-ism.org.ua/index.php/ALTIS/article/view/221
• Назва журналу: Tooling materials science

The main task of the work is to demonstrate the possibility of manufacturing hard-alloy parts by 3D printing by layer-by-layer deposition and to manufacture the corresponding consumable composite material for this. The choice of the initial components of the binder system for the manufacture of a consumable composite material - a filament filled with a hard alloy mixture, suitable for the manufacture of hard alloy parts by 3D printing by layer-by-layer deposition are substantiated. The volumetric content of the hard alloy mixture in the polymer binder has been substantiated. The filament manufacturing sequence is described. Filaments were tested by 3D printing. The basis of the binder system was paraffin and a double ethylene copolymer containing elastic, combining and adhesive components.  The filler content was 40, 50, 55, 60 % (vol.). Medium-grain size  carbide mixtures of the VK20 and VK8 grades were used as a filler. It was found that the optimal filler content is 50 % (vol.). The quality of printed products are strongly depend on the uniformity and homogeneity of filament diameters; the accuracy of the calibration of the printer nozzle over the work surface, printing temperatures and work surface. The polymer binder was removed from the printed simples  by thermal destruction in two stages: at 220 ° C for 120 min and 240 ° C for 120 min, and further test sintering of the simples was carried out at a temperature of 1400 ° C for 30 min in an argon atmosphere. To obtain sintered simples without pores and ŋ phase, it is necessary to carry out high-quality removal of the binder in recovering and protective environment. 3D printing by layer-by-layer deposition is promising for the manufacture of plan parts of complex shape for instrumental purposes.