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Electric arc melting furnace device and arc melting method of molten material

A technology of arc melting and melting, which is applied in the direction of furnace control device, electric furnace heating, furnace, etc., and can solve the problem of insufficient stirring

Active Publication Date: 2017-08-08
大亚真空株式会社 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the melt at the bottom immediately changes from a liquid phase to a solid phase, and sufficient stirring cannot be performed

Method used

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  • Electric arc melting furnace device and arc melting method of molten material
  • Electric arc melting furnace device and arc melting method of molten material
  • Electric arc melting furnace device and arc melting method of molten material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1）

[0145] use figure 1 In the shown arc melting furnace, the power supply unit adopts a structure that can control the frequency of the current with a sine wave, and a CCD camera is used as the molten metal measurement unit.

[0146] Zr, Cu, Ni, and Al as raw materials were accommodated in a concave portion provided in a copper mold with an atomic ratio of 55:30:5:10 and a total weight of 25 g, and evacuated to a vacuum. Then, when the ultimate vacuum degree is 2×10 -3 Stop exhaust at Pa, and introduce high-purity Ar gas up to 50kPa.

[0147] Thereafter, a current to which a sine wave current is added is supplied from the power supply unit 10 to the water-cooled electrode 5, and the raw material is melted by the above-mentioned arc discharge.

[0148] In addition, the maximum current at this time is 300A, and the minimum current is 200A. The frequency of the current is 12 Hz.

[0149] In addition, after the molten alloy material is cooled, an inversion operation of inverting...

Embodiment 2）

[0153] use figure 1 In the shown arc melting furnace, the power supply unit adopts a structure that can control the frequency of the current with a sine wave, and uses a CCD camera as a molten metal measurement unit.

[0154] The following experiments were carried out in the case of Zr, Cu, Ni, and Al as raw materials with an atomic ratio of 55:30:5:10 and a total weight of 2 g, 3 g, 4 g, and 30 g.

[0155] First, the above-mentioned raw material is accommodated in a concave portion provided in a copper mold, and exhausted to a vacuum. Then, when the ultimate vacuum degree is 2×10 -3 Stop exhaust at Pa, and introduce high-purity Ar gas up to 50kPa. Thereafter, a current to which a sine wave current is added is supplied from the power supply unit 10 to the water-cooled electrode 5, and the raw material is melted by the above-mentioned arc discharge.

[0156] At this time, the maximum current is 300A, the minimum current is 200A, the current from the power supply unit is mad...

Embodiment 3）

[0162] use figure 1 In the shown arc melting furnace, the power supply unit adopts a structure that can control the frequency of the current with a sine wave, and uses an illuminance meter as a molten metal measurement unit.

[0163] The following experiments were carried out with Zr, Cu, Ni, and Al as raw materials having an atomic ratio of 55:30:5:10 and total weights of 15g, 20g, 25g, 30g, 35g, and 40g.

[0164] First, the above-mentioned raw material is accommodated in a concave portion provided in a copper mold, and exhausted to a vacuum. Then, when the ultimate vacuum degree is 2×10 -3 Stop exhaust at Pa, and introduce high-purity Ar gas up to 50kPa. Thereafter, as a first step, a constant current of 300 A of direct current is supplied from the power supply unit 10 to the water-cooled electrode 5 for 60 seconds, the raw material is melted by the above-mentioned arc discharge, and the molten material is then turned over.

[0165] As the second step, a constant current...

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Abstract

It is an object of the present invention to provide an arc melting furnace device and an arc discharge control method capable of efficiently stirring a melted material after melting without requiring a huge amount of labor for an operator. Equipped with: a casting mold 3, which is installed inside the melting chamber 2, and has a concave portion 3a; a non-consumable discharge electrode 5, which heats and melts the molten material accommodated in the concave portion 3a; supplying electric power; and a control device 11, which controls the output intensity of the arc discharge from the non-consumable discharge electrode by controlling the power supply part, and the control device 11 controls the output current from the power supply part 10 and the current Frequency, so that the output intensity of the arc discharge from the non-consumable discharge electrode 5 is variable, and the molten metal after the molten material is heated and melted is stirred.

Description

technical field [0001] The present invention relates to an arc melting furnace device and an arc melting method for a molten material, for example, to an arc melting furnace device and an arc melting method for a molten material that can be preferably applied to a molten material such as an alloy material. Background technique [0002] Arc melting, which melts metal materials contained in a mold, particularly alloy materials, ceramic materials, and the like, by using heat energy of arc discharge, has been conventionally widely known. [0003] In this arc melting, there are consumable arc melting and non-consumable arc melting. Among them, the non-consumable arc melting uses a DC arc power supply in a decompressed argon environment, uses a tungsten electrode as a cathode, and passes a fixed-strength direct current between the cathode and the molten material (anode) placed on the water-cooled mold. The heat energy generated by the arc discharge will melt the molten material. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D27/02C22B9/20
CPCB22D27/02F27B5/14F27D2099/0021C22B9/20F27D11/08C22B9/02F27B3/08F27B3/085F27M2003/13F27D19/00F27D2019/0003
Inventor 龟山元弘川井芳明横山嘉彦井上明久
Owner 大亚真空株式会社