SU1507518A1 - Method of top-four casting of steel - Google Patents

Abstract

The invention relates to ferrous metallurgy, in particular to methods for casting steel, and can be used for casting steel from the top into through molds. The purpose of the invention is to improve the quality of the bottom part of the ingot and to protect the pan from erosion. The method involves pouring into the mold of the first portion of the metal — the residue from the previous melting to a height of 0.005–0.015, the height of the mold, and after it has hardened, the filling of the mold with the liquid metal of the next melt.

Description

(21) 4401895 / 23-02

(22) 03/31/88

(46) 09/15/89. BKHP. Number 34

(71) Enakievsky Metallurgical Plant and Tulachermet Research and Production Association

(72) G.V.Vinokurov, Yu.N. Borisov, A.A.Golubev, Yu.V.Orobtsev, V.P.Gri. Goryev, A.V.Avernov, S.A.Klepikov, V. V.Sharafutdinov, S.K.Golikov, L.F.Litvinov, I.V. Batov and V.F. Usik (53) 621.746.393 (088.8) (56) USSR Author's Certificate No. 722658, class B 22 D 7/00, 1980.

Vlasov N.N. and other Handbook of casting of ferrous metals. M .: Metallurgi, 1981, p. 69-73.

Author's certificate of the USSR No. 1026936, cl. B 22 D 7/00, 1983.

(54) METHOD OF RANCH1 UKI STEEL TOP FROM (57) The invention relates to ferrous metallurgy, in particular to methods for casting steel, and can be used to cast steel from the top into through molds. The purpose of the invention is to improve the quality of the bottom part of the ingot and to protect the pallet from ramshan. The method involves pouring into the mold of the first portion of the residual metal from the previous melting to a height of 0.005-0.015 of the height of the mold and, after it has hardened, the filling of the mold with a liquid metal of the next melt.

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The invention relates to ferrous metallurgy, in particular to methods for casting steel, and can be used for casting steel from the top into through molds.

The purpose of the invention is to improve the quality of the bottom part of the ingot and to protect the pan from erosion.

The process involves pouring into the mold the first portion of the liquid residual metal from the previous melt to a height of 0.005-0.015 of the height of the mold, and after it solidifies, the mold is filled with the liquid metal of the next melt.

Filling the residual metal to a height of less than 0.005 of the height of the mold leads to a decrease in the effectiveness of protecting the pan from washing out by pouring metal when filling the mold and welding the ingot to the pan. Filling the residual metal to a height of more than 0.015 the height of the mold causes the excess heat of the molten metal to fill the mold not enough to evenly melt the entire surface of the hardened first batch, resulting in incomplete welding of metals and stratification of the ingot during rolling with increasing waste trimming. In the interval of the filling level of the first portion of the metal-residue of 0.005-0.015 heights

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the spoons are provided with reliable protection of the surface of the pallet against ramevapi by liquid metal and high-quality welding of metals over the entire contact surface.

Example. Boiling steel is poured into ingots weighing 7.2-8.0 tons. The casting is carried out from a bucket

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140 t installed on pallets of 10 ti mass of metal in the bucket mass of metal downward through molds of height 2.2-, 4 m. The temperature of cast steel is 1540-1550 ° C. Before casting, several formulations with molds prepared for casting from above are served on the casting area. After casting the melt into the molds of the first composition, the remaining metal in the ladle is poured into the empty molds of the second composition, filling them to the level of 0.005-0.015 of the height of the mold. Then a new ladle with metal of the subsequent melting is put into the casting span. During this time, the first portions of the residual metal in the molds of the second composition are completely solidified. From the second ladle, this mold of the second composition is filled with a new metal, and its residues are poured into molds.

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Claims (1)

la molded ingots, 1 claims The method of casting steel from above, which includes pouring the first batch of liquid metal into the mold with the pallet, crystallizing it and then filling the entire volume of the mold with the liquid metal, in order to improve the quality of the bottom part of the ingot and protect the pan from erosion, pour the first batch liquid metal residue from the previous melting to a height of 0.005-0.015 of the height of the mold, and after it is solidified, fill the mold with the liquid metal of the next melt. third composition. Then the cycle repeats. The proposed method makes it possible to eliminate erosion by the metal of the pallet and to obtain ingots with a better bottom part. At the same time, the remainder of the metal in the ladle is useful; the weight of the metal in the ladle La Ingot Bars, Invention Formula The method of casting steel from above, which includes pouring the first batch of liquid metal into the mold with the pallet, crystallizing it and then filling the entire volume of the mold with the liquid metal, in order to improve the quality of the bottom part of the ingot and protect the pan from erosion, pour the first batch liquid metal residue from the previous melting to a height of 0.005-0.015 of the height of the mold, and after it is solidified, fill the mold with the liquid metal of the next melt.