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Method for improving solidification quality of electroslag remelting 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 solidification quality, promoting transformation, and improving the solidification quality of steel ingots

Inactive Publication Date: 2018-08-17
MAANSHAN HUASHENG METALLURGICAL SCI & TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose 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 method for improving the solidification quality of electroslag remelting steel ingots. Metal electrodes introduce pulse currents of pulse power sources into the smelting process In the process, the pulse power supply is energized to form an electric circuit, and the consumable metal of the metal electrode is remelted and re-solidified to obtain a steel ingot. Under the action of high-frequency pulses, the metal molten pool produces a weak disturbance, which can promote the uniformity of the temperature field of the molten pool and promote The growth of equiaxed grains is guaranteed, which can improve the solidification quality of steel ingots

Method used

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  • Method for improving solidification quality of electroslag remelting steel ingot

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Embodiment 1

[0037] Such as Figure 7 As shown, a method for improving the solidification quality of an electroslag remelted steel ingot in this embodiment, the metal electrode 130 introduces the pulse current of the pulse power supply 111 into the smelting process, and the pulse power supply 111 is energized to form an electrical circuit. The self-consumption of the metal electrode 130 Metal 133 is remelted and re-solidified to obtain steel ingots. The details are:

[0038] Step 1. When the smelting device is used for smelting, before the metal electrode 130 is remelted, the graphite electrode is firstly used for slag removal;

[0039] Step 1. After the slag removal is completed, insert the consumable metal 133 of the metal electrode 130 into the liquid slag of the smelting crystallizer 210. The positive pole of the pulse power supply 111 is connected to the metal electrode 130, and the negative pole of the pulse power supply 111 is connected to the bottom water tank 310. The pulse power...

Embodiment 2

[0045] The basic content of this embodiment is the same as that of Embodiment 1, the difference is that, as figure 2 As shown, a device for improving the solidification quality of electroslag remelted steel ingots using double electrodes 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 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, the consumable metal 133 at the bottom of the metal electrode 130 is inserted into the electroslag layer 223, and the metal electrode 130 is inserted into the electroslag layer 223. The electrodes 130 include a first electrode 131 and a second electrode 132 , and the first electrode 131 and the second electrode 132 are respectively connected to t...

Embodiment 3

[0048] 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 method for improving solidification quality of an electroslag remelting steel ingot and relates to the technical field of electroslag remelting. The method for improving thesolidification quality of the electroslag remelting steel ingot. When a smelting device is adopted for smelting, consumable metal of a metal electrode is inserted into liquid state slag of a smeltingcrystallizer, a positive pole of a pulse power source is connected with the metal electrode, a negative pole of the pulse power source is connected with a bottom water tank, the pulse power source iselectrified and an electric circuit is formed, and the consumable metal of the metal electrode is re-smelted and re-solidified, so that the steel ingot is obtained. When the smelting device is adoptedfor smelting, the metal electrode leads pulse current of the pulse power source to the smelting process, the pulse power source is electrified and an electric circuit is formed, and the consumable metal of the metal electrode is re-smelted and re-solidified, so that the steel ingot is obtained.

Description

technical field [0001] The invention belongs to the technical field of electroslag remelting, and more specifically relates to a method 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, there are also some problems in the electroslag remelting method, such as (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 graduall...

Claims

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Application Information

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