Melting device for improving solidification quality of electroslag re-melting steel ingot

A technology of electroslag remelting steel, high quality, applied in the field of electroslag remelting, can solve the problems of poor solidification quality of electroslag remelting steel ingots, achieve the effect of improving the solidification quality of steel ingots, promoting uniformity, and increasing the equiaxed crystal rate

Inactive Publication Date: 2018-07-06
MAANSHAN HUASHENG METALLURGICAL SCI & TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The object of the present invention is to overcome the problem of relatively poor solidification quality of electroslag remelting steel ingots in the prior art, and provide a smelting device for improving the solidification quality of electroslag remelting steel ingots. The electrode is inserted into the smelting crystallizer, and the consumable metal at the bottom of the metal electrode is inserted into the electroslag layer. Under the action of high-frequency pulses, the metal molten pool produces weak disturbances, which can promote the uniformity of the temperature field of the molten pool and promote equiaxed The growth of crystals can improve the solidification quality of steel ingots

Method used

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  • Melting device for improving solidification quality of electroslag re-melting steel ingot

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Embodiment 1

[0039] Such as figure 1 As shown, a smelting device for improving the solidification quality of electroslag remelted steel ingots in this embodiment includes a pulse power supply 111, a smelting crystallizer 210, a metal electrode 130 and a bottom water tank 310, and the bottom water tank 310 is arranged on the smelting crystallizer 210 The bottom of the bottom water tank 310 has the function of supporting and cooling the smelting crystallizer 210, and the bottom water tank 310 and the smelting crystallizer 210 together form a reaction molten pool for composite roll electroslag smelting, and the bottom of the molten pool is cooled by the bottom water tank 310 The bottom is cooled and solidified to form a solidified steel ingot 221 , and the upper part of the solidified steel ingot 221 is a molten metal pool 222 and an electroslag layer 223 in sequence. The smelting crystallizer 210 is used to accommodate the molten metal pool 222 and the electroslag layer 223; the metal electr...

Embodiment 2

[0047] The basic content of this embodiment is the same as that of Embodiment 1, the difference is that, as figure 2 As shown, a smelting device of this embodiment that adopts double electrodes to improve the solidification quality of electroslag remelting steel ingots includes a pulse power supply 111, a smelting crystallizer 210, a metal electrode 130, and a bottom water tank 310. The bottom water tank 310 is arranged on the smelting crystallizer 210, the smelting crystallizer 210 is used to accommodate the molten metal pool 222 and the electroslag layer 223, the metal electrode 130 is inserted into the smelting crystallizer 210, and the consumable metal 133 at the bottom of the metal electrode 130 is inserted into the electroslag layer 223, The metal electrode 130 includes a first electrode 131 and a second electrode 132 , and the first electrode 131 and the second electrode 132 are respectively connected to the positive and negative poles of the pulse power supply 111 . T...

Embodiment 3

[0050] The basic content of this embodiment is the same as that of Embodiment 2, the difference is that, as image 3 As shown, the distance between the first electrode 131 and the crystallizer axis 230 is d 1 , the distance between the second electrode 132 and the crystallizer axis 230 is d 2 , and d 1 ≠ d 2 . And the first electrode 131 and the second electrode 132 are the same and are R, then d 2 >d 1 +R, so that during the rotation of the bottom tank 310, the first electrode 131 and the second electrode 132 move relative to the liquid electroslag layer 223, and the trajectory of the first electrode 131 and the second electrode 132 are different. They also do not overlap, thereby promoting the uniform distribution of the molten inner layer metal in the electroslag layer 223, which not only improves the uniformity of the distribution of the inner layer metal, but also makes the molten liquid metal and the electroslag layer 223 fully react. The outside of smelting crysta...

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Abstract

The invention discloses a melting device for improving the solidification quality of an electroslag re-melting steel ingot and belongs to the technical field of electroslag re-melting. The melting device comprises a pulse power supply, a melting crystallizer, a metal electrode and a bottom water tank, wherein the bottom water tank is arranged at the bottom of the melting crystallizer, the interiorof the melting crystallizer is used for accommodating a metal molten pool and an electroslag layer; a metal electrode is inserted inside the melting crystallizer, consumable metal at the bottom of the metal electrode is inserted in the electroslag layer, a positive electrode of the pulse power supply is connected with the metal electrode, and a negative electrode of the pulse power supply is connected with the bottom water tank. The melting device disclosed by the invention has the benefits that the positive electrode of the pulse power supply is connected with the metal electrode, and the negative electrode of the pulse power supply is connected with the bottom water tank; the pulse power supply applies pulse current to the metal molten pool and generates weak disturbance to the molten metal pool, so that the uniformity of a temperature field of the molten metal pool can be promoted. Therefore, the characteristic similar to directional solidification growth is realized, and the solidification quality of the steel ingot is improved.

Description

technical field [0001] The invention belongs to the technical field of electroslag remelting, and more specifically relates to a smelting device for improving the solidification quality of electroslag remelting steel ingots. Background technique [0002] As a special metallurgical method, electroslag remelting integrates refining and solidification. The material after electroslag remelting has the advantages of high purity and compact solidified structure, so this method occupies an important position in the production of high-quality materials . However, the electroslag remelting method also has some problems: [0003] (1) The depth of the molten metal pool (shape) is not easy to control. Keeping the metal molten pool in the shallow flat shape during the electroslag remelting process is the guarantee for obtaining good crystallization quality. However, as the remelting process proceeds, if the smelting parameters are not well controlled, the molten metal pool will gradua...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B9/187
CPCC22B9/18
Inventor 常立忠施晓芳
Owner MAANSHAN HUASHENG METALLURGICAL SCI & TECH DEV
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