Selivorstov V. Theoretical and technological bases of gaz - dynamyc influence on a metal solidifiable in a foundry mould

Dissertation is devoted to development of theoretical bases of conditioning temperature and power, and realization of time-varying gas pressure (gaz-dynamyc influence) on a liquid phase to the complete freezing of cast in the pressurized system of cast - device for the input of gas. Pressurizing of this system in a foundry mould is carried out due to formation of hard superficial layer of metal. Basic principles of realization of gaz-dynamyc influence are formulated, the universal method of calculation of the modes is developed realization of technological process and proper devices structurally taking into account meaningful descriptions of cast and foundry mould. Possibility of the use of engineering method of calculation of the temperature fields of Stefan-Shvarz is grounded at a necessity diversification of methods of determination of temperature and temporal parameters of pressurizing of cast in a foundry mould. Possibility of the use of engineering method of calculation of the temperature fields is grounded at a necessity diversification of methods of determination of temperature and temporal parameters of pressurizing of cast in a foundry mould. Features are investigational of process of formation of structure of metal, physical and mechanical properties of casts got with the use of the developed technology pilot-scale. The developed technologies and devices are inculcated at production of casts from an aluminium alloy, carbon and stamp instrumental steels in metallic forms and also special steel in the forms of foundry on the smelted models.