Research of heat-exchange processes in a casting form with reinforcing phase

Abstract

The method of lost foam casting with the reinforcing phase installed inside the polystyrene foam model is considered as a basic technological process. In The new multicomponent systems for the theory of foundry processes will be created in this case: «metal–model–implant–mold» and «metal–reinforcing phase–mold». The influence of the installed macroreinforcing elements in the form of steel rods on the heat and mass transfer was researched, solidification and hydrodynamics is investigated. The process was modeled using the ProCast program by evaluating the solidification conditions in the sand casting mold of cast samples from copper alloys and the reinforcing phase from carbon steel. To compare the results, the process of solidification of cast specimens with a size of 10×200 mm without a reinforcing phase and with a reinforcing phase in the form of rods occupying 20 and 50% of its cross section area was modeled. The research results are presented in the form of graphical curves of the cooling temperature and time. It has been established that the use of a reinforcing phase in a casting mold has a significant impact on the removal of metal overheating due to the consumption of a certain amount of heat for heating the reinforcing phase, increases the rate of alloy hardening and casting cooling.

Obtaining Cast Reinforced Structures by Liquid Phase Combination of System Components

“…Є результати дослідження впливу макроармуючої фази на зняття температури перегріву сплаву та на швидкість охолодження [6], але в роботі не розглядаються фізико-хімічні процеси, що відбуваються на межі армуючого матеріалу та матричного сплаву. При отриманні армованих виливків з макроімплантатами, які розміщені в порожнині ливарної форми або в пінополістироловій моделі, виникають нові для теорії ливарних процесів багатокомпонентні системи: «метал -модель -імплантат -форма» та «метал -армуюча фаза -форма» [7].…”