SU256799A1 - METHOD OF ELECTROSLAG - Google Patents

Description

Electroslag metal casting methods are known, in which a consumable electrode (or consumable electrodes) is fed down into the slag bath as it melts, or the cooled mold together with the directional ingot moves up. In either case, the consumable electrode and the mold are moving relative to each other, which requires special mechanisms for their mixing.

A feature of the described method is that in the mold, wider up, the conical consumable electrodes are remelted, the taper of the mold is not less than the taper of the mold, and solid flux is fed into the mold. This makes it possible to carry out the process without interchanging the electrode n of the mold and adjusting it to the smelting rate.

In a cooled mold with an internal conical cavity, broadened to the top of the windshell, a consumable cone-shaped electrode repetitively fixed in it is molded into it, which follows the shape of the internal cavity of the mold. An ingot cast in a cast-iron mold can be used as an electrode.

To the consumable electrode and the mold with 1 help of current leads supply alternating current OR direct current. Melsda current leads laid insulating gasket. The bottom mold is mated to the device: m for siphon slag pouring, consisting of a bottom plate and an attachment. The angle of taper of the silencer and the consumable electrode, the gap between the mold and the electrode, the depth of the slag bath and the deposition of the process in the described ECM method are chosen so that at each instant of melting the cross section of the electrode at the level of the beginning of its melting is equal to or close to the transverse area sections of the internal cavity of the mold at the level of the slag and metal bath section. Due to this, during the entire melting, the instantaneous linear rates of electrode fusion and height increase are close to each other or are equal in the absence of mutual transfer: the electrode and mold ingot mold with an ingotlable ingot.

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In the ESP process, to maintain the desired depth of the slag bath, a solid flux is periodically or continuously added to the gap between the electrode and the mold. Besides,

in order to ensure the stability of the ESP process, during the melting process, the voltage is controlled in such a way that the electrode melting rate and the distance of its end from the metal bath mirror are in

An additional measure for regulating the ESP process can also serve as a change in the ratio of the fractions of current flowing from the end of the electrode to the wall of the mold and into the directional ingot. In this case, an insulating gasket is placed between the mold and the pallet, and the current is supplied to both the mold and the pallet with two branches, with adjustable resistance included in one of the branches.

Subject invention

Claims (2)

1. Electroslag remelting method of consumable electrodes in a cooled mold with preliminary pouring of liquid slag, characterized in that, in order to carry out the process without mutual displacement of the electrode and the mold, in a mold broadened upwards (conical electrodes with a conicity not less than taper from the right. 2. A method according to claim 1, characterized in that, in order to regulate the process during the smelting process, a solid flux is introduced into the mold.