Slag system for ingot stripping and electroslag remelting of nickel-based alloy plate blank

A nickel-based alloy and electroslag remelting technology, which is applied in the field of special alloy refining, can solve the problems of steel leakage, slag leakage, and difficulty in obtaining surface quality, so as to reduce energy consumption, reduce production costs, and save forging and blanking. The effect of the process

Inactive Publication Date: 2014-11-12
LUOYANG SUNRUI SPECIAL EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The ingot electroslag remelting process is that the consumable electrode is melted to form a molten metal pool, and the molten metal pool is continuously pulled out of the crystallizer while solidifying. The crystallizer and the ingot move relatively, and there will be problems of steel leakage and slag leakage. Not easy to get good surface quality

Method used

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  • Slag system for ingot stripping and electroslag remelting of nickel-based alloy plate blank
  • Slag system for ingot stripping and electroslag remelting of nickel-based alloy plate blank
  • Slag system for ingot stripping and electroslag remelting of nickel-based alloy plate blank

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Effect test

Embodiment 1

[0026] The production of nickel-based alloy UNS N06625 electroslag slab by adopting the slag system of the present invention comprises the following steps.

[0027] The first step is to use intermediate frequency furnace + AOD furnace to smelt consumable electrodes. The thickness, width and length of the electrodes are 270 mm, 1320 mm and 2800 mm respectively. The chemical composition of the electrodes meets the standard requirements, as shown in Table 1;

[0028] Table 1 Electrode chemical composition (wt%)

[0029]

[0030] The second step is to polish the surface of the consumable electrode;

[0031] The third step is to prepare slag. The slag system adopts CaF 2 、Al 2 o 3 , CaO, SiO 2 Quaternary slag system, the weight percentage of each component is 63%, 15%, 13%, 9% respectively, and the slag amount is 300kg. Put the slag into the electric furnace separately, control the temperature at 800°C, and bake for 7 hours;

[0032] The fourth step, the baked slag system...

Embodiment 2

[0041] The production of nickel-based alloy UNS N06600 electroslag slab by adopting the slag system of the present invention includes the following steps.

[0042] The first step is to use intermediate frequency furnace + AOD furnace to smelt consumable electrodes. The thickness, width and length of the electrodes are 270 mm, 1320 mm and 2800 mm respectively. The chemical composition of the electrodes meets the standard requirements, as shown in Table 3;

[0043] Table 3 Electrode Chemical Composition (wt%)

[0044]

[0045] The second step is to polish the surface of the consumable electrode;

[0046] The third step is to prepare slag. The slag system adopts CaF 2 、Al 2 o 3 , CaO, SiO 2 Quaternary slag system, the weight percentage of each component is 64%, 16%, 14%, 6% respectively, and the slag amount is 300kg. Put the slag into the electric furnace separately, control the temperature at 800°C, and bake for 7 hours;

[0047] The fourth step, the baked slag system ...

Embodiment 3

[0056] The slag system of the present invention is used to produce nickel-based alloy UNS N06690 electroslag slabs, comprising the following steps.

[0057] The first step is to use intermediate frequency furnace + AOD furnace to smelt consumable electrodes. The thickness, width and length of the electrodes are 270 mm, 1320 mm and 2800 mm respectively. The chemical composition and weight percentage of the electrodes meet the requirements of Table 5:

[0058] Table 5 Electrode Chemical Composition (wt%)

[0059]

[0060] The second step is to polish the surface of the consumable electrode;

[0061] The third step is to prepare slag. The slag system adopts CaF 2 、Al 2 o 3 , CaO, SiO 2 Quaternary slag system, the weight percentage of each component is 65%, 15%, 13%, 7% respectively, the amount of slag is 300kg, the slag is placed separately in the electric furnace, the temperature is controlled at 800°C, and baked for 7 hours;

[0062] The fourth step, the baked slag sys...

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Abstract

The invention belongs to the technical field of special alloy refinement and in particular relates to a slag system for ingot stripping and electroslag remelting of a nickel-based alloy plate blank. The slag system comprises the following components in percentage by weight: 60%-65% of CaF2, 15%-20% of Al2O3, 13%-15% of CaO and 6%-10% of SiO2; the melting point of the slag system is 1,100-1,150 DEG C, the viscosity at 1600 DEG C is 0.04-0.07Pa.s, and the slag resistance at 1600 DEG C is 0.27-0.3 ohm.cm. The nickel-based alloy plate blank subjected to ingot stripping and electroslag remelting, produced by adopting the slag system is good in surface quality and free of remarkable defects such as double skin and slag inclusions; the interior quality of the plate blank is detected according to GB / T1979-2001 standards, the defects of looseness, segregation, white bands, subsurface bubbles, residual shrinkage cavities, skull patch, fish eyes, axial intercrystalline cracks, interior bubbles, non-metallic inclusions, slag inclusions, dissimilar metal inclusions and the like are not discovered, and the interior quality of steel ingot is good.

Description

technical field [0001] The invention belongs to the technical field of special alloy refining, and in particular relates to a slag system for electroslag remelting of nickel-based alloy slabs. Background technique [0002] Electroslag remelting is to insert the consumable electrode into the slag pool of the water-cooled crystallizer. The slag pool gradually heats and melts it to form metal droplets, and then the metal droplets pass through the slag pool and enter the metal molten pool. The metal molten pool is cooled by water. Gradually solidified under the conditions to form ingots. The electroslag remelting process technology is mainly divided into: fixed electroslag remelting process and ingot pulling type electroslag remelting process. [0003] The fixed electroslag remelting process is that the entire smelting process is carried out in a closed crystallizer, and the ingots are solidified sequentially from bottom to top, and there is no problem of steel leakage or slag ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B9/18
Inventor 罗利阳王新鹏陈帅超宁天信张春林
Owner LUOYANG SUNRUI SPECIAL EQUIP
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