CASTING ALLOYING METHOD Russian patent published in 2017 - IPC B22F3/23 B22D11/10 B22D27/20 

FIELD: metallurgy.

SUBSTANCE: invention relates to alloying metal castings produced by self-propagating high-temperature synthesis (SHS) method under conditions of excess pressure of gaseous medium at the stage of their shaping. An exothermal mix of metal oxides with reducing agent is fed into a melting crucible with a hole in the bottom which is preliminarily covered with aluminium plate; a crystalliser and the melting crucible with the exothermal mix are consecutively installed in a reactor, the reactor is sealed, the exothermal mix is locally ignited under pressure of gaseous medium that exceeds atmospheric pressure, and the SHS is melted in the reaction chamber and the resulting melt from the melting crucible is released into the crystalliser, and alloying additives are introduced therein before installing the crystalliser in the reactor. For modifying and alloying castings with powder modifiers, alloying elements or mixtures thereof, an injector and an ejector are used which allow supply of powdered additives to the melt flow when discharging metal into the crystalliser. The process for producing dense ingots of metals and alloys is carried out in the reaction chamber at a pressure below atmospheric pressure.

EFFECT: invention allows to produce alloyed castings with specified characteristics depending on the requirements: volume-alloyed with alloyed surfaces, as well as composite castings containing ceramic, cermet inclusions.

13 cl, 7 ex