Investigation of technology schemes for the production of cast composite functional materials

Abstract

Obtaining and using ligatures, modifiers and deoxidizers to obtain structural alloys of a given composition and properties in metallurgy and foundry is an important production task. One of the existing developments in the field of technologies for the preparation of functional composites on a matrix basis for non-ferrous and ferrous alloys is the combination of solid filler with a melt of an active metal binder. At that, from the filler material, which is selected from the group comprising iron, nickel, titanium, silicon, boron, manganese, first a porous workpiece of a given geometric shape with a technological total pore volume is formed, then it is heated to a temperature corresponding to the liquidus temperature of the active binder, the heating being carried out in a gas inert medium, after which the heated workpiece is impregnated with the melt of this binder by forced infiltration of the melt into the pores of the workpiece under pressure, mainly by the method of liquid stamping. The task of the study was to expand the scope of use of composites, to create a single flexible universal, and at the same time, simplified technology that will provide an opportunity to obtain a wide range of diverse in composition and service characteristics of deoxidizers, modifiers and ligatures for non-ferrous and ferrous alloys. The developed technology, based on vacuum impregnation (suction) of the matrix alloy through porous filler, makes it possible to obtain new functional metal-matrix composite materials of a given composition for use as inexpensive ligatures, modifiers and deoxidizers in metallurgical processes, as well as to simplify and make their use safe. The proposed method for obtaining ligatures, modifiers and deoxidizers provides a possibility of their industrial serial production and is easy to perform, and also reduces the cost of the metallurgy product obtained with their application by increasing the effective content of active components and their more complete assimilation, which reduces the consumption of scarce and expensive materials.