SU527920A1 - Electronic beam for producing multilayer ingots - Google Patents

Description

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The invention relates to the field of special electrometallurgy and is intended to produce multi-layer ingots using an electron-beam technology. One of the most important applications of the invention is the preparation of bimetallic ingots.

Installations are known for producing bimetallic ingots in which methods are used to pour two metals into the same mold, the method of continuous casting of a bimetallic ingot, the method of pouring liquid metal into the gap: two moving with heated ribbons.

However, the oxidation of the previously poured was 1 c of the bimetal or the non-observance of a certain temperature cutting. Often they are the cause of scrapping on the bundles during subsequent rolling of bimetallic ingots.

The most well-known installation for producing metal ingots, containing a horizontal pallet, is mounted on a trolley, which has the possibility of reciprocating motion.

Such an installation eliminates the oxidation of the metal, since

The process is carried out in vacuum. However, when bimetallic ingots are smelted from dissimilar materials with very different linear expansion coefficients (thermal bimetals), heating by a thermal zone causes distortion of the components, leading to metal grains of the second (htsey under the finished nepBovl layer of components and thickness differences, which makes it difficult to produce quality thermobimetal.

In order to exclude grates of the post-sump layer under the previous one, the end walls of the pallet in the proposed electron-beam installation are made removable with the collar on the outer diameter in their upper part, and on the inner surface of the walls there are thickenings along the entire length of the layers, and the height projections equal to the thickness of the corresponding layers.

The drawing shows a General view of the proposed installation.

The installation consists of a vacuum chamber 1, an evil supply of consumable material 2, electronic guns 3, an intermediate tank 4 connected to the tilt mechanism, and a metal receiver in the form of a pallet 5 with removable walls 6, on the upper sides of which there is a shoulder 7, and on the inner surface protrusions 8, reducing the inner perimeter of the pallet from the bottom up in an amount equal to the number of secondary layers.

The pallet is mounted on the trolley 9 and is connected to the longitudinal movement mechanism by means of the rod 10 being led out of the chamber through the seal. Between the exact capacity 4 and the pallet 5 with removable walls 6 are made of water-cooled.

The installation works as follows.

The initial metal of the first component of the bimetal in the form of a sheet. The il, mounted on the protrusions 8 of the walls b, melted by the rays of the electron guns 3, and the liquid metal being held from the strait by the shoulder 7, flows to the bottom of the pallet 5, where. it is heated by the same rays of electron guns 3. After the sheet stock 11 is fused, the reciprocating movement of pallet 5 with simultaneous heating of the metal with the rays of electron guns 3 brings the metal to the same aggregate state of the entire area of pallet 5. With a further decrease in temperature, the metal crystallizes, form the first layer of a two-layer ingot. The upper cut of the first layer, the approach under the protrusions 8 of the side walls of the b of the pallet 5, fixes the end walls of the layer, thus excluding liquid gravy. the metal of the second component of the bimetal under the first crystallized layer. Then, the starting metal 2 of the second component of the bimetal is melted by the rays of the electron guns 3. The molten metal flows into the intermediate tank. 4, where the rays of the guns 3 are also heated; After filling, intermediate tank 4 is tilted and liquid metal is poured into pan 5 on the first crystallized layer. The metal is maintained in a liquid state by scientific research institutes on the entire area of pan 5 by means of a back-and-forth motion of the latter and electron gun beams 3. Source metal 2 continue to melt the rays of the electron guns 3, and it continuously flows into the tray 5 through the inclined intermediate tank 4. After the dose of the second component of the bimetal is fused, the temperature of the metal surface is gradually reduced, from wounds, however, the same temperature throughout rehshm sump area and the metal crystallizes to form a second layer of two-layer ingot. The finished ingot is removed from the pallet 5 after removal of the walls 6 ..

The proposed installation allows to obtain high-quality multilayer ingots with a good bottom surface. Elimination of warping of the molds during the formation of the ingot eliminates gravy and thickness variation of the components, which, in turn, eliminates the cost of additional processing of the ingots before rolling. reduces the consumption of the original metal and increases the percentage yield of the metal during subsequent rolling.

Claims (1)

Invention Formula An electron beam installation for producing multilayer ingots, comprising a cylindrical pallet mounted on a trolley having a reciprocating alternating space, characterized in that, in order to eliminate gravy of the subsequent layer under the previous one, the end pan of the pallet is removable with an outer diameter collar in the upper part, and on the inner surface of the walls there are thickenings along the entire perimeter in an amount equal to the number of tracks following them, and their height is equal to the thickness of the corresponding layers.