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Method for producing composite roll by preheating consumable electrode electroslag remelting

A technology of consumable electrodes and composite rolls, which is applied in the field of electroslag remelting, can solve problems such as inability to efficiently produce high-quality bimetal composite rolls, and accelerate the melting of metal consumable electrodes, so as to avoid a large amount of melting and reduce dwell time. effect of time

Active Publication Date: 2018-07-13
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 bimetallic composite roll production technology cannot efficiently produce high-quality bimetallic composite rolls, and provides a method for producing composite rolls by electroslag remelting of preheated self-consumable electrodes. For the inner layer metal of the compound roll, insert the bottom of the metal consumable electrode into the upper crystallizer, and the heating part will preheat the metal consumable electrode, so as to accelerate the melting of the metal consumable electrode and weld it to the core of the roller. surface, to realize the uniform coating of the working surface material on the surface of the roller core

Method used

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  • Method for producing composite roll by preheating consumable electrode electroslag remelting
  • Method for producing composite roll by preheating consumable electrode electroslag remelting
  • Method for producing composite roll by preheating consumable electrode electroslag remelting

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Embodiment 1

[0055] A method of preheating consumable electrode electroslag remelting to produce composite rolls according to the present invention uses the roll core 520 as the inner layer metal of the composite roll, inserts the bottom of the metal consumable electrode 510 into the upper crystallizer 110, and heats the components Preheating the metal consumable electrode 510 accelerates the melting of the metal consumable electrode 510 and welding to the surface welded to the roll core 520 to obtain a composite roll.

[0056] Such as Figure 10 As shown, a method for producing composite rolls by electroslag remelting of preheated self-consumable electrodes is implemented in the following steps:

[0057] Step 1. Equipment installation

[0058] The metal consumable electrode 510 is arranged above the smelting side 113 of the upper crystallizer 110, the roller core 520 is placed in the lower crystallizer 120, the bottom water tank 300 supports the roller core 520 at the bottom of the lower...

Embodiment 2

[0074] 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

[0076] 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 a method for producing a composite roll by preheating consumable electrode electroslag remelting and belongs to the technical field of electroslag remelting. The method for producing the composite roll comprises an eccentric crystallizer, a bottom water tank and a metal consumable electrode. The eccentric crystallizer comprises an upper crystallizer and a lower crystallizer, the diameter of the lower crystallizer is smaller than the diameter of the upper crystallizer, the lower crystallizer is arranged under the upper crystallizer, and axes of the upper crystallizer andthe lower crystallizer are not on the same straight line; the metal consumable electrode is arranged above the upper crystallizer, the bottom water tank is arranged below the lower crystallizer, andthe metal consumable electrode and the bottom water tank are respectively connected with two poles of a power supply. The material thickness of a working surface can be adjusted flexibly with eccentric design of the electroslag remelting crystallizer; the metal consumable electrode is externally surrounded by an induction coil, so that the consumable electrode can be preheated in the remelting process, electrode melting is accelerated, mass melting of a surface layer of a roll core is avoided, and therefore 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 a method for producing composite rolls by electroslag remelting of preheated 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 bimetal co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D23/10B22D19/16B22D27/08B22D27/02
CPCB22D19/16B22D23/10B22D27/02B22D27/08
Inventor 常立忠施晓芳
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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