Seliv'orstov V. Development, investigation and modeling of the process for gas dynamic replacement of melt from gate system in casting

The thesis is devoted to the research and development of technology for adjustable gas dynamic replacement of liquid metal out of siphon gate in castings and ingots. Termotemporal conditions of the process realization in response to various dimentions of siphon gate, heat physical properties of form and alloy material and duration of pouring have been established. The distinctive feature of the offered devises is the sealing of gate system from the environment at the expense of filled alloy that hardens under duress before formation of the metal layer of a given thickness. Physical and mathematical models of the metal hardening process in the sprue device system for gas input were developed. To adapt the model, data of experimental investigations of the process of form heating and metal crystallization in the sprue were used. Termotemporal conditions of metal hardening in the opening between the central refractory pipe and the pipe cooler have been established.