CS270849B1 - Method of complex inoculant and modification alloy production - Google Patents

Abstract

This innovation applies to a method of production of a complex inoculation and modification alloy in a pressure tank using the thermal content of a liquid alloy discharged from an electric arc furnace. This liquid alloy at a temperature between 1100 to 1450 degrees Celsius is placed into the pressure tank while solid the components of a charge - magnesium or metals of rare earth - are dipped into the liquid alloy under an increased pressure. The prepared complex inoculation and modification alloy of the type such as iron - silicon - magnesium - calcium, is then cast.

Description

(57) The solution concerns a process for the production of a complex vaccination and modification alloy. in a pressure vessel using the heat content of the melt discharged from the electric arc furnace. This melt is placed in a pressure vessel at a temperature of 1100 to 1450 ° C, whereby the solid components of the feedstock - magnesium or rare earth metals - are immersed in the melt at elevated pressure. The finished complex iron-silicon-magnesium-calcium alloy inoculation and modification alloy is cast.

The invention relates to a process for the production of a complex inoculation and modification alloy of the iron-silicon-magnesium-calcium type.

Up to now, such alloys have been produced in diesel furnaces, electric induction furnaces, by the production of solid blanks. The disadvantages of these production methods are the high consumption of low energy, the inhomogeneity of the produced alloy and thus the fluctuation of its utility properties, and further unsatisfactory hygienic conditions of production.

The above-mentioned drawbacks are eliminated by the method of production of a complex inoculation and modification alloy of the iron-silicon-magnesium-calcium type, whose essence consists in the fact that it melts in an arc furnace with a mass of 44 to 57% silicon % of aluminum and the remainder of the iron, at a temperature of 1100 to 1450 ° C, are added in a pressure vessel at a pressure of 0.5 to 1.5 MPa, 2 to 20% by weight of magnesium or rare earth metals are added.

The proposed production method results in lower energy intensities of production, utilization of the sensible heat of the liquid alloy, higher homogeneity of the finished product, increased performance and also the quality of the castings used in the production of the inoculation and modification alloy.

Example

An alloy produced in an electric arc furnace containing 49% by weight of silicon,

1.3% of aluminum, 0.9% of calcium, the remainder of the iron, after standing out of the electric arc furnace, after standing, are placed in a pressure vessel with an age of 8% by weight, lump magnesium and 0.3% by weight. that the position of these raw materials can be altered by external control. After the pressure vessel is closed, it is pressurized with air or inert gas to 1.0 MPa and the prepared solid charge components - magnesium and rare earths are immersed in the melt for 8 minutes. After removal of the overpressure and opening of the pressure vessel, the finished complex inoculation and modification alloy is poured, for example, into chill molds.

In this way, it is possible to produce a complex grafting and modifying alloy with the necessary properties, homogeneity and chemical composition.

Claims (1)

OBJECT OF THE INVENTION Process for producing an iron-silicon-magnesium-calcium complex inoculation and modification alloy by melting in an electric furnace and finished in a pressure vessel, characterized in that from 0.5 to 4, into an arc furnace having a mass composition of 44 to 57% silicon % of calcium, up to 2% of aluminum, and the remainder iron, at a temperature of 1100 to 1450 ° C, are added in a pressure vessel at a pressure of 0.5 to 1.5 MPa, 2 to 20% by weight of magnesium or rare earth metals.