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Electroslag remelting device for producing composite roll by preheating consumable electrode and method of electroslag remelting device

A technology of consumable electrodes and composite rolls, which is applied in the field of electroslag remelting, can solve the problems of inability to efficiently produce high-quality bimetal composite rolls, accelerate the melting of metal consumable electrodes, and reduce the residence time of the roll core. Avoids mass melting, promotes uniformity, reduces residence time effects

Active Publication Date: 2018-07-06
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to overcome the problem that the existing bimetal composite roll production technology cannot efficiently produce high-quality bimetal composite rolls, and provides an electroslag remelting device and method for producing composite rolls by preheating self-consumable electrodes. Through the eccentric design of the electroslag remelting crystallizer, the production of bimetallic composite rolls with uniform coating and firm welding of the working surface material on the surface of the roll core is realized. The thickness of the working surface material can be adjusted flexibly, and the metal is accelerated through the induction coil. The melting of the consumable electrode reduces the residence time of the roll core in the slag pool, and effectively welds the roll core and the roll working surface material

Method used

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  • Electroslag remelting device for producing composite roll by preheating consumable electrode and method of electroslag remelting device
  • Electroslag remelting device for producing composite roll by preheating consumable electrode and method of electroslag remelting device
  • Electroslag remelting device for producing composite roll by preheating consumable electrode and method of electroslag remelting device

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Effect test

Embodiment 1

[0047] refer to figure 1 , figure 2 , image 3 and Figure 4 As shown, an electroslag remelting device for preheating consumable electrodes to produce composite rolls in this embodiment includes an eccentric mold, a bottom water tank 300 and a metal consumable electrode 510; the eccentric mold includes an upper crystallizer Mold 110 and lower crystallizer 120, upper crystallizer 110 and lower crystallizer 120 axis centers are not on the same straight line, and lower crystallizer 120 is arranged on the bottom of upper crystallizer 110; The bottom of upper crystallizer 110 includes opening side 112 and smelting Side 113, the bottom of the opening side 112 is connected to the lower crystallizer 120, and the shape of the opening side 112 matches the upper port surface of the lower crystallizer 120; the bottom surface of the upper crystallizer 110 except the opening side 112, other areas are the melting side 113, and the upper part of the melting side 113 A metal consumable elect...

Embodiment 2

[0056] Such as Figure 5 As shown, the present embodiment is basically the same as Embodiment 1, the difference is that in the present embodiment, the included angle α=45° between the upstream surface 111A of the diversion dam 111 and the bottom end surface, and the angle between the back flow surface 111B of the diversion dam 111 and the bottom surface The angle between the end surfaces is β=70°, and the height of the diversion dam 111 is 1 / 4 of the distance from the bottom surface of the upper crystallizer 110 to the bottom surface of the metal consumable electrode 510. When the molten metal hits the diversion dam 111, it is not drained A part of the molten metal directly crosses the top of the diversion dam 111, and the top of the cross-section direction of the diversion dam 111 is arc-shaped, and the molten metal is easier to cross the top of the diversion dam 111; The angle α is smaller than the angle β between the backflow surface 111B and the bottom end surface of the d...

Embodiment 3

[0058] Such as Figure 6 As shown, this embodiment is basically the same as Embodiment 1, the difference is: this embodiment is provided with a lower stirring coil 210 below the electromagnetic stirring coil 200, and the stirring range of the lower stirring coil 210 includes the molten pool 540 and its upper vicinity , the temperature in the area near the top of the molten pool 540 is relatively low, and the temperature of the molten metal in this area is difficult to control, and it is easy to solidify and cause the smelting process to be interrupted. The alternating flow in this area relieves the decrease of the temperature in this region; under the agitation of the lower stirring coil 210, the molten pool 540 flows, which breaks the columnar crystals being produced and produces more nucleation cores, thus promoting the transformation of columnar crystals to equiaxed crystals. transformation. Improve the quality of the roll face.

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Abstract

The invention discloses an electroslag remelting device for producing a composite roll by preheating a consumable electrode and a method of the electroslag remelting device, belonging to the technicalfield of electroslag remelting. The electroslag remelting device comprises an eccentric type crystallizer, a bottom water tank and a metal consumable electrode, wherein the eccentric type crystallizer comprises an upper crystallizer and a lower crystallizer, the diameter of the lower crystallizer is smaller than that of the upper crystallizer, the lower crystallizer is arranged at the lower partof the upper crystallizer, and the axle centers of the upper crystallizer and the lower crystallizer are not located on the same straight line; and the metal consumable electrode is arranged at the upper part of the upper crystallizer, the bottom water tank is arranged at the lower part of the lower crystallizer, and the metal consumable electrode and the bottom water tank are respectively connected with two poles of the power supply. By utilizing an eccentric design of the electroslag remelting device, the thickness of the material of a working surface can be flexibly adjusted; the metal consumable electrode is externally wound with an induction coil and can be preheated in the remelting process, so that the melting of the electrode is accelerated, the substantial melting of surface layers of a roll core is avoided, and the roll core and a roll body are effectively welded.

Description

technical field [0001] The invention belongs to the technical field of electroslag remelting, and more specifically relates to an electroslag remelting device and method for producing composite rolls by preheating consumable electrodes. Background technique [0002] At present, the most typical and widely used bimetallic composite materials are metallurgical rolls, which are the main large-scale tools for rolling steel. If the roll is made of high-hardness material as a whole, it will not only increase the production cost, but also increase the difficulty of machining the non-working surface. For this reason, bimetallic composite materials came into being. The working face is made of high hardness, good wear resistance and relatively expensive materials, while the non-working face is made of high toughness or good processing performance and relatively cheap materials. Take the roll as an example, if the roll is made of integral high-speed steel, the cost is expensive; if a ...

Claims

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Application Information

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IPC IPC(8): B22D19/16B22D23/10
CPCB22D19/16B22D23/10
Inventor 常立忠施晓芳
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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