CN114619019A - Equipment and process for compositely (re) manufacturing metallurgical roller by electroslag remelting and surfacing - Google Patents
Equipment and process for compositely (re) manufacturing metallurgical roller by electroslag remelting and surfacing Download PDFInfo
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- CN114619019A CN114619019A CN202210227975.2A CN202210227975A CN114619019A CN 114619019 A CN114619019 A CN 114619019A CN 202210227975 A CN202210227975 A CN 202210227975A CN 114619019 A CN114619019 A CN 114619019A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D23/00—Casting processes not provided for in groups B22D1/00 - B22D21/00
- B22D23/06—Melting-down metal, e.g. metal particles, in the mould
- B22D23/10—Electroslag casting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D19/00—Casting in, on, or around objects which form part of the product
- B22D19/06—Casting in, on, or around objects which form part of the product for manufacturing or repairing tools
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The invention discloses equipment and a process for electroslag remelting surfacing composite manufacturing and composite remanufacturing of a metallurgical roller. In the equipment, an arc striking electroslag crystallizer is positioned at the lower part of a copper water-cooled crystallizer and is in insulated connection with the copper water-cooled crystallizer through a heat-resistant insulating material; the roller is arranged in the copper water-cooling crystallizer and the arc striking electroslag crystallizer, and the upper shaft head and the lower shaft head of the roller are respectively exposed out of the upper part and the lower part of the crystallizer; the arc striking electroslag crystallizer is arranged at the position of the lower part of the roller base metal corresponding to the lower shaft head of the roller; a bottom water tank is arranged at the bottom of the arc striking electroslag crystallizer, and a consumable electrode is connected with the bottom water tank through a power transformer to form a power supply loop; an electroslag filling opening is arranged at a position corresponding to the arc striking electroslag crystallizer and used for conveying molten electroslag to the inner side of the arc striking electroslag crystallizer; the consumable electrode is arranged between the copper water-cooling crystallizer and the arc striking electroslag crystallizer and the roller. The composite roller manufactured by the equipment has the advantages of simple process, good composite layer quality and low production cost.
Description
Technical Field
The invention relates to equipment and a process for compositely manufacturing and compositely remanufacturing a metallurgical roller by utilizing an electroslag heavy fusion welding technology, and belongs to the field of composite manufacturing and composite remanufacturing of metallurgical rollers.
Background
The roller is one of important parts in steel production, and the roller is affected by working condition environment in the on-line application, so that the roller is often subjected to phenomena such as peeling, abrasion, block dropping, steel sticking, weld bead marks and the like, and the roller is caused to lose efficacy. The composite (re) manufacturing treatment is carried out on the surface of the roller, so that the service life of the roller can be obviously prolonged, and the steel rolling consumption is reduced.
Electroslag remelting is a method of melting using resistance heat generated when current passes through slag as a heat source. The electroslag remelting surfacing composite method is a method of surfacing a layer of alloy steel on the periphery of a worn old roller or a worn core rod by an electroslag remelting method to repair the old roller or manufacture a bimetal composite roller. Two metal materials with different properties are compounded into a whole in a water-cooled crystallizer with a certain shape through a certain electroslag metallurgy process, so that the metal materials have different properties to meet the requirements of different use processes. The roller overlaying layer manufactured by the electroslag remelting and overlaying composite method has the excellent performances of high purity, low sulfur content, less non-metallic inclusions, smooth surface of an alloy ingot, cleanness, uniformity and compactness, uniform metallographic structure and chemical components and the like, so that various countries around the world actively engage in the research and development of various electroslag remelting and overlaying composite roller manufacturing processes.
Although China is the earliest country for researching, developing and applying electroslag metallurgy technology in the world, a great gap exists in production and application. At present, besides certain application in the manufacture of steel ingots for cold rolls and small cold rolls, the research on electroslag remelting surfacing composite manufacturing of rolls is less, and devices and application precedent for electroslag remelting surfacing composite manufacturing of rolls are not seen in China.
Disclosure of Invention
The invention aims to provide equipment for compositely (re) manufacturing a metallurgical roller by electroslag remelting and overlaying technology, which is used for compositely manufacturing and compositely re-manufacturing a composite layer metallurgical roller by the electroslag remelting and overlaying technology.
The invention also aims to provide a process for compositely manufacturing and compositely remanufacturing the metallurgical roller by using the equipment.
In order to achieve the purpose, the invention adopts the following technical scheme:
an apparatus for composite manufacture of electroslag remelting surfacing and composite remanufacturing of a metallurgical roller comprises: a copper water-cooled crystallizer, a consumable electrode and an arc striking electroslag crystallizer; wherein the content of the first and second substances,
the arc striking electroslag crystallizer is positioned at the lower part of the copper water-cooled crystallizer and is in insulated connection with the copper water-cooled crystallizer through a heat-resistant insulating material;
the roller is arranged in the copper water-cooling crystallizer and the arc striking electroslag crystallizer, the roller base metal is arranged at the position corresponding to the copper water-cooling crystallizer, the upper shaft part of the roller is exposed out of the copper water-cooling crystallizer, and the lower shaft part of the roller is exposed out of the lower part of the arc striking electroslag crystallizer; the arc striking electroslag crystallizer is arranged at the position of the lower part of the roller base metal corresponding to the lower shaft head of the roller;
a bottom water tank is arranged at the bottom of the arc striking electroslag crystallizer, and a consumable electrode is connected with the bottom water tank through a power transformer to form a power supply loop;
an electroslag filling opening is arranged at a position corresponding to the arc-starting electroslag crystallizer and is used for conveying molten electroslag into a space formed by the arc-starting electroslag crystallizer, the bottom water tank and the lower shaft head of the roller;
the consumable electrode is arranged between the copper water-cooling crystallizer and the arc striking electroslag crystallizer and the roller.
Preferably, the outer parts of the upper shaft head and the lower shaft head are provided with arc striking plates, and refractory materials (refractory mortar) are filled between the arc striking plates and the shaft heads.
Preferably, the material of the arc striking electroslag crystallizer consists of a high-temperature ceramic material or a steel material coated with a refractory material inside.
Preferably, the copper water-cooling crystallizer and the arc striking electroslag crystallizer are respectively formed by combining two semi-annular structures, and the two semi-annular structures are connected through a bolt. The structural design facilitates the taking out of the roller after the melting.
Preferably, the apparatus further comprises consumable electrode lifting means for lifting and lowering the consumable electrode when replacing the consumable electrode.
The working principle of the equipment of the invention is as follows:
firstly, melting slag remelted by electroslag into liquid slag in a slag melting tank, then leading the liquid slag into a space between an arc-starting electroslag crystallizer and a roller through an electroslag filling opening, inserting a consumable electrode group into the liquid slag, melting the consumable electrode by using resistance heat generated when current passes through the slag after electrification as a heat source and dropping, gradually gathering formed metal molten drops into the inner space of the arc-starting electroslag crystallizer, gradually rising along with the liquid level of the metal melt to reach the water-cooled copper crystallizer, cooling and solidifying the surface to generate a compact structure, thereby obtaining the high-quality composite layer roller. In order to ensure the uniformity of the composite layer on the surface of the whole roller, arc striking plates are arranged at an arc striking part (a lower shaft head position) and an arc stopping part (an upper shaft head position), so that the arc striking and arc extinguishing unstable parts can be removed in machining.
The invention also provides a process for compositely manufacturing and compositely remanufacturing a metallurgical roller by using the electroslag remelting and surfacing welding device, which comprises the following steps of:
(1) preparing a plurality of groups of consumable electrodes;
(2) preparing a roller matrix, and removing a fatigue layer and defects of a roller body;
(3) remelting slag in a slagging furnace, introducing liquid slag into the inner space of the arc-starting electroslag crystallizer through an electroslag injection port, introducing low-temperature cooling water into the outer shell of the arc-starting electroslag crystallizer, and cooling the arc-starting electroslag crystallizer;
(4) inserting the prepared consumable electrode into liquid slag, electrifying and arcing;
(5) when the height of the rest part of the consumable electrode is 30-40 mm, exchanging the consumable electrode;
(6) when the consumable electrode leaves the roller surface and enters the upper shaft head position, the arc is extinguished;
(7) and after cooling, taking out the roller, removing a slag layer on the surface of the roller composite layer, putting the roller into a resistance furnace for tempering heat treatment, and then carrying out machining, flaw detection and packaging.
Preferably, in the step (6), in order to ensure the stability of the alloy and the hardness of the roll surface, the consumable electrode can be quenched after being separated from the roll surface by at least 20 mm.
The invention creatively adopts a combined structure of two crystallizers, namely an arc-starting electroslag crystallizer and a copper water-cooled crystallizer, on the basis of the traditional electroslag remelting technology, and realizes electrode arc-starting melting by leading in molten electroslag through the arc-starting electroslag crystallizer. After the composite manufacturing is completed, the double semi-annular crystallizers can be opened simultaneously, the subsequent processes such as taking out the composite roller and the like are facilitated, the structure is simple, the operation is easy, and the preparation of the composite roller by electroslag remelting surfacing welding is realized. The concrete advantages include:
(1) the arc striking electroslag crystallizer has the advantages that:
firstly, the problem that the conventional slag is directly introduced into a crystallizer from the upper part after being melted, and the slag is cooled with the crystallizer and the surface of a roller for too long introduction distance so as to be solidified, thereby being difficult to strike the arc is avoided; secondly, avoiding the direct connection between the copper crystallizer and the dummy bar plate and the water cooling tank to cause serious hazards such as electric breakdown and the like, and improving the safety coefficient; and thirdly, the arc striking electroslag crystallizer is positioned at the shaft head part, and refractory materials are filled at the roller head part of the rolling roller, so that the arc striking sleeve (transition section) is ensured to be positioned in the shaft head area, the non-uniformity of alloy caused by unstable arc striking to the roller surface is avoided, and the strength of the shaft head is also protected. Fourthly, the continuous preservation of heat is facilitated.
(2) The copper water-cooled crystallizer is mainly used for cooling the compounded part, thereby providing guarantee for obtaining grain refined structure.
(3) Arc striking plates are arranged on the shaft heads at the arc striking part and the arc extinguishing part, so that unstable parts before arc striking and arc extinguishing can be removed, and the uniformity of a composite layer on the surface of the whole roller is ensured.
(4) In order to facilitate the taking out of the roller after the melting, the two crystallizers can adopt a double semi-ring structure, and the two semi-ring structures can be connected by a bolt to form a full-circle crystallizer.
(5) The composite roller manufactured by the process has the advantages of simple manufacturing process, good quality of the composite layer, low production cost, compact microstructure at the joint, no segregation and cracks, gradient distribution of hardness and strength of the joint layer and the like.
Drawings
FIG. 1 is a schematic cross-sectional view of an apparatus of the present invention.
FIG. 2 is a metallographic photograph of the composite layer roll obtained in example 1. The center is a transition area without any defects.
FIG. 3 is a metallographic photograph of the composite layer roll obtained in example 1. The surface layer has fine structure, is martensite structure and has no defects such as cracks.
Detailed Description
The following examples of the present invention are only for illustrating the specific embodiments of the present invention, and are not intended to limit the scope of the present invention, and it will be apparent to those skilled in the art that various changes or modifications can be made without departing from the scope of the technical features of the present invention, and the essence thereof is the same as the technical solution of the present invention, and thus the present invention is within the scope of the present invention.
The invention is described in detail below with reference to the figures and the specific embodiments.
FIG. 1 is a schematic cross-sectional view of an apparatus of the present invention. As shown in fig. 1, the apparatus includes: a copper water-cooled crystallizer 1, a consumable electrode 2 and an arc striking electroslag crystallizer 3; the arc striking electroslag crystallizer 3 is positioned at the lower part of the copper water-cooled crystallizer 1 and is in insulated connection with the copper water-cooled crystallizer 1 through a heat-resistant insulating layer 4 made of heat-resistant insulating materials; the roller is arranged in the copper water-cooled crystallizer 1 and the arc striking electroslag crystallizer 3, wherein a roller base metal 5 is arranged at a position corresponding to the copper water-cooled crystallizer 1, the upper shaft head 6 part of the roller is exposed out of the upper part of the copper water-cooled crystallizer 1, and the lower shaft head 7 part of the roller is exposed out of the lower part of the arc striking electroslag crystallizer 3; the arc striking electroslag crystallizer 3 is arranged at the lower part of the roller base metal 5 corresponding to the lower shaft head 7 of the roller; a bottom water tank 8 is arranged at the bottom of the arc striking electroslag crystallizer 3, and the consumable electrode 2 is connected with the bottom water tank 8 through a power transformer 9 to form a power supply loop; an electroslag filling opening 10 is arranged at a position corresponding to the arcing electroslag crystallizer 3 and is used for conveying molten electroslag into a space formed by the arcing electroslag crystallizer 3, a bottom water tank 8 and a lower shaft head 7 of a roller; the consumable electrode 2 is arranged between the copper water-cooling crystallizer 1 and the arc striking electroslag crystallizer 3 and the roller.
Wherein, the outer parts of the upper shaft head 6 and the lower shaft head 7 of the roller are respectively provided with an arc striking plate 11, and a refractory material 12, such as refractory mortar, is filled between the arc striking plate 11 and the shaft heads. The arc striking electroslag crystallizer can be made of high-temperature ceramic materials or steel materials coated with refractory materials inside. In order to facilitate the taking out of the roller after the melting, the copper water-cooling crystallizer and the arc striking electroslag crystallizer are respectively formed by combining two semi-annular structures, and the two semi-annular structures are connected and assembled through bolts.
As shown in fig. 1, the arc striking electroslag crystallizer mainly comprises a water spacer 14, a refractory layer 15 and an arc striking plate 11 outside a lower shaft head of a roll, and a space formed by the refractory layer 15, a bottom water tank 8 and the arc striking plate 11 accommodates molten electroslag from an electroslag injection port 10.
The apparatus may further comprise a consumable electrode lifting device for lifting the consumable electrode while replacing the consumable electrode.
In the process of implementing the invention, the slagging slag material is purchased in the market, and a certain amount of iron powder can be added.
Example 1
And performing electroslag remelting surfacing composite remanufacturing on a 92CrMo offline cold-rolled support roller with the diameter of phi 650mm multiplied by 1530mm, wherein the diameter of the offline cold-rolled support roller is phi 590 mm.
1.1 turning the fatigue layer and the defects of the roller body firstly. After turning to phi 570mm, magnetic powder and ultrasonic non-destructive inspection can be carried out, and the surface and internal defects are not found, so that the roller can be used as a roller base material.
1.2 selecting proper alloy material to make the self-consuming electrode sleeve. In this example, a consumable electrode is made of a high carbon alloy material. The high-carbon alloy material comprises the following components: c: 0.8 percent; mn: 1.5 percent; si: 0.5 percent; cr: 5.0 percent; v: 2 percent; w: 3.0 percent; mo: 2.0 percent; rare earth elements: 0.1 percent; the balance being Fe. Multiple groups of rings with the inner diameter of 610mm and the outer diameter of 650mm and the length of 1500mm are manufactured by centrifugal casting.
1.3 preparing a corresponding crystallizer according to a roller with the diameter of 650mm, wherein the inner diameter of the crystallizer is selected to be 680 mm.
And the upper part and the lower part of the 1.4 roller diameter shaft head are respectively attached with a drawing plate. The roller is vertically placed on the base through hoisting, and is fastened and fixed.
1.5, the adopted slag charge comprises the following components in percentage by weight: CaF2 35％；CaO 35％；SiO 2 15％；Al2O310 percent; and 5% of Fe is melted in a melting furnace.
1.6 the liquid slag melted by the electroslag filling opening is sent into an arc striking electroslag crystallizer, and the thickness of the liquid slag can be controlled between 20mm and 200 mm.
1.7 inserting a consumable electrode into the slag of an arc striking electroslag crystallizer, starting an electroslag remelting power supply when the consumable electrode is contacted with the liquid slag, and starting to melt the electrode by using resistance heat generated when current passes through the slag as a heat source. The current used in this experiment was 6000A, and the voltage was 35V.
1.8 when the consumable electrode is stably melted in the arc-striking electroslag crystallizer, controlling the feeding speed of the alloy consumable electrode, and slowly filling the arc-striking electroslag crystallizer along with the melting of the electrode, then slowly feeding liquid metal into the water-cooled copper crystallizer to melt and cover the surface of the roller body.
1.9 As the slag is lost, the electroslag should be fed from above the crystallizer (electroslag feed inlet 13 shown in FIG. 1) for the droplets to react sufficiently.
1.10 molten metal drops are uniformly melted in the water-cooled crystallizer and clad the base metal on the surface of the roller, thereby realizing good metallurgical bonding.
1.11 when the height of the residual part of one consumable electrode is 30-40 mm, stopping electroslag remelting and surfacing at the moment, rapidly replacing the electrode, maintaining the temperature of liquid slag and the temperature of slag during electroslag remelting and surfacing to be less than or equal to 30 ℃, and avoiding slag solidification caused by rapid temperature drop of the liquid slag due to power failure.
1.12 after the arc is restarted, the manufacturing of the composite roller is continued.
1.13 in order to ensure the uniformity of welding quality, an arc striking plate is also arranged at the upper shaft head, and when the liquid level exceeds the height of the roller surface by at least 20mm, the surfacing can be stopped.
1.14 after slow cooling, the crystallizer adopts a double semi-ring structure, the two semi-rings are connected by bolts, and the composite roller can be conveniently taken out by opening the bolts.
1.15 Heat treatment
After roller compounding, the mixture is put into a furnace with the temperature of 300 ℃ to be cooled to the room temperature along with the furnace, then is slowly heated to 550 ℃, is cooled to 120 ℃ along with the furnace in a resistance furnace, and is taken out of the furnace to be air-cooled to the room temperature.
1.16 detection
The repair thickness of the cold-rolled backup roll repaired by the embodiment is 40mm on one side, the surface hardness of the composite back roll is 54 +/-1 HRC, and the uniform hardness performance is good; the magnetic powder and nondestructive flaw detection are both free of defects, and machining, flaw detection and packaging can be carried out according to the requirements of drawings.
As shown in FIG. 2, the composite layer is a martensite structure, and the transition region between the base material and the composite layer in the composite back roller of FIG. 3 has no defects.
Example 2
And performing electroslag remelting overlaying composite remanufacturing on a 92CrMo offline cold-rolled support roller with the diameter of phi 650mm multiplied by 1530mm, wherein the diameter of the offline cold-rolled support roller is phi 600 mm.
2.1 the fatigue layer and defects of the roll body are turned first. After turning to phi 580mm, surface and internal defects are not found through magnetic powder and ultrasonic nondestructive inspection.
2.2 selecting proper alloy material to make the consumable electrode group. In this example, a consumable electrode is made of a high carbon alloy material. The high-carbon alloy material comprises the following components: c: 1.2 percent; mn: 4.8 percent; si: 1.3 percent; cr: 11.0 percent; v: 1%%; w: 10.0 percent; mo: 6.0 percent; rare earth elements: 1.5 percent; the balance being Fe.
The batch is weighed according to the designed alloy content requirement, smelting is carried out, and the high-carbon alloy material is jointly smelted by adopting an electric arc furnace EBT primary smelting, LF refining and VD vacuum degassing to prepare a round bar with phi of 60mm and the length of 1500 mm. Each consumable electrode consists of 6 rods and is uniformly and symmetrically distributed on the cross beam.
2.3 preparing a corresponding crystallizer according to the roller phi of 650mm, wherein the inner diameter of the crystallizer is selected to be phi 680 mm.
2.4 the upper part and the lower part of the roller diameter shaft head are respectively attached with a drawing plate. The roller is vertically placed on the base through hoisting, and is fastened and fixed.
2.5 the market adopted is that the slag charge is melted in a melting furnace when purchased.
2.6 the liquid slag melted by the electroslag filling opening is sent into an arc striking electroslag crystallizer, and the thickness of the liquid slag can be controlled between 20mm and 200 mm.
2.7 inserting the consumable electrode into the slag of the arc striking electroslag crystallizer, starting an electroslag remelting power supply when the consumable electrode is contacted with the liquid slag, and starting to melt the electrode by using resistance heat generated when current passes through the slag as a heat source. The current used in this experiment was 8000A and the voltage was 40V.
2.8 when the electrode is stably melted in the arc-starting electroslag crystallizer, controlling the feeding speed of the alloy consumable electrode, and slowly filling the arc-starting electroslag crystallizer with the melted electrode, then slowly feeding liquid metal into the water-cooled copper crystallizer to melt and cover the surface of the roller body.
2.9 with the loss of slag, the slag should be continuously supplied from above the mold for the sufficient reaction of the molten drop.
2.10 the molten metal drops are uniformly melted in the water-cooled crystallizer and clad on the base metal on the surface of the roller, thereby realizing good metallurgical bonding.
2.11 when the height of the residual part of one consumable electrode is 30-40 mm, stopping electroslag remelting and surfacing at the moment, rapidly replacing the electrode, maintaining the temperature of the liquid slag to be less than or equal to 30 ℃ different from the temperature of the slag during electroslag remelting and surfacing, and avoiding the phenomenon of slag solidification caused by rapid temperature drop of the liquid slag due to power failure.
2.12 after the arc is restarted, the manufacturing of the composite roller is continued.
2.13 in order to ensure the uniformity of welding quality, an arc striking plate is also arranged at the upper shaft head, and the surfacing can be stopped when the liquid level exceeds the height of the roller surface by 20 mm.
2.14 after slow cooling, the crystallizer adopts a double semi-ring structure, the two semi-rings are connected by bolts, and the composite roller can be conveniently taken out by opening the bolts.
2.15 Heat treatment
After the rollers are compounded, the mixture is put into a furnace with the temperature of 300 ℃ to be cooled to the room temperature along with the furnace, then is slowly heated to 550 ℃, is cooled to 120 ℃ along with the furnace in a resistance furnace, and is taken out of the furnace to be cooled to the room temperature.
2.16 detection
The repair thickness of the cold-rolled backup roll repaired by the embodiment is 40mm on one side, the surface hardness of the composite back roll is 54 +/-1 HRC, and the uniform hardness performance is good; the magnetic powder and nondestructive flaw detection are both free of defects, and machining, flaw detection and packaging can be carried out according to the requirements of drawings.
Claims (8)
1. The utility model provides an equipment of metallurgical roll is made and compound refabrication to electroslag remelting build-up welding is compound, its characterized in that, this equipment includes: a copper water-cooled crystallizer, a consumable electrode and an arc striking electroslag crystallizer; wherein the content of the first and second substances,
the arc striking electroslag crystallizer is positioned at the lower part of the copper water-cooled crystallizer and is in insulation connection with the copper water-cooled crystallizer through a heat-resistant insulating material;
the method comprises the following steps that (1) rollers are arranged in a copper water-cooling crystallizer and an arc striking electroslag crystallizer, a roller base metal is arranged at a position corresponding to the copper water-cooling crystallizer, the upper shaft part of each roller is exposed out of the copper water-cooling crystallizer, and the lower shaft part of each roller is exposed out of the lower part of the arc striking electroslag crystallizer; the arc striking electroslag crystallizer is arranged at the position of the lower part of the roller base metal corresponding to the lower shaft head of the roller;
a bottom water tank is arranged at the bottom of the arc striking electroslag crystallizer, and a consumable electrode is connected with the bottom water tank through a power transformer to form a power supply loop;
an electroslag filling opening is arranged at a position corresponding to the arc-starting electroslag crystallizer and is used for conveying molten electroslag into a space formed by the arc-starting electroslag crystallizer, the bottom water tank and the lower shaft head of the roller;
the consumable electrode is arranged between the copper water-cooling crystallizer and the arc striking electroslag crystallizer and the roller.
2. The equipment for the electroslag remelting and surfacing composite manufacturing and composite remanufacturing of the metallurgical roller according to claim 1, wherein arc striking plates are arranged outside the upper shaft head and the lower shaft head, and a refractory material is filled between the arc striking plates and the shaft heads.
3. The equipment for compositely manufacturing and compositely remanufacturing the metallurgical roll according to the electroslag remelting bead welding process as claimed in claim 2, wherein the refractory material is refractory mortar.
4. The equipment for compositely manufacturing and compositely remanufacturing the metallurgical roll according to the electroslag remelting bead welding process as claimed in claim 1, wherein the material of the arc striking electroslag crystallizer consists of a high-temperature ceramic material or a steel material coated with a refractory material inside.
5. The equipment for compositely manufacturing and compositely remanufacturing the metallurgical roller by electroslag remelting and overlaying welding according to claim 1, wherein the copper water-cooled crystallizer and the arc striking electroslag crystallizer are respectively formed by combining two semi-annular structures, and the two semi-annular structures are connected through a bolt.
6. The apparatus for the combined electroslag remelting and surfacing manufacturing and the combined remanufacturing of a metallurgical roll according to claim 1, further comprising a consumable electrode lifting device for lifting the consumable electrode when replacing the consumable electrode.
7. A process for compositely manufacturing and compositely remanufacturing a metallurgical roller by electroslag remelting and surfacing welding by using the equipment as claimed in any one of claims 1 to 6, which is characterized by comprising the following steps:
(1) preparing a plurality of groups of consumable electrodes;
(2) preparing a roller matrix, and removing a fatigue layer and defects of a roller body;
(3) remelting slag in a slagging furnace, introducing liquid slag into the inner space of the arc striking electroslag crystallizer through an electroslag injection port, introducing low-temperature cooling water into the outer shell of the arc striking electroslag crystallizer, and cooling the arc striking electroslag crystallizer;
(4) inserting the prepared consumable electrode into the liquid slag, and electrifying and arcing;
(5) when the height of the rest part of the consumable electrode is 30-40 mm, exchanging the consumable electrode;
(6) when the consumable electrode leaves the roller surface and enters the upper shaft head position, the arc is extinguished;
(7) and after cooling, taking out the roller, removing a slag layer on the surface of the roller composite layer, putting the roller into a resistance furnace for tempering heat treatment, and then carrying out machining, flaw detection and packaging.
8. The process for compositely manufacturing and compositely remanufacturing a metallurgical roll according to claim 7, wherein in the step (6), in order to ensure the stability of the alloy and the hardness of the roll surface, the consumable electrode can be extinguished after being separated from the roll surface by at least 20 mm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210227975.2A CN114619019B (en) | 2022-03-08 | 2022-03-08 | Equipment and process for manufacturing metallurgical roller by electroslag remelting and surfacing compound (re) method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210227975.2A CN114619019B (en) | 2022-03-08 | 2022-03-08 | Equipment and process for manufacturing metallurgical roller by electroslag remelting and surfacing compound (re) method |
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| Publication Number | Publication Date |
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| CN114619019A true CN114619019A (en) | 2022-06-14 |
| CN114619019B CN114619019B (en) | 2023-06-23 |
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| CN202210227975.2A Active CN114619019B (en) | 2022-03-08 | 2022-03-08 | Equipment and process for manufacturing metallurgical roller by electroslag remelting and surfacing compound (re) method |
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Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1250440A (en) * | 1970-06-25 | 1971-10-20 | ||
| JPS56117875A (en) * | 1980-02-18 | 1981-09-16 | Hitachi Ltd | Manufacture of composite ingot by electroslag remelting |
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| CN107262686A (en) * | 2017-06-21 | 2017-10-20 | 东北大学 | A kind of device and method for preparing compound steel ingot |
| CN108273980A (en) * | 2018-04-04 | 2018-07-13 | 安徽工业大学 | A kind of preheating consutrode electroslag remelting production composite roll method |
| CN108372286A (en) * | 2018-03-29 | 2018-08-07 | 东北大学 | A kind of electroslag remelting process prepares the device and method of bimetallic composite roll |
| CN108746562A (en) * | 2018-07-03 | 2018-11-06 | 东北大学 | Graphite electrode ring preheats the device and method that electroslag smelting casting prepares large-scale compound steel ingot |
| CN111590054A (en) * | 2020-04-28 | 2020-08-28 | 湖南力方轧辊有限公司 | Device and method for preparing bimetal clad roller by ingot drawing type electroslag remelting method |
| CN113061741A (en) * | 2021-03-18 | 2021-07-02 | 东北大学 | Electroslag remelting composite device and method for improving temperature distribution of slag bath by external magnetic field |
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| GB1250440A (en) * | 1970-06-25 | 1971-10-20 | ||
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| US4815521A (en) * | 1986-10-24 | 1989-03-28 | Hitachi, Ltd. | Method of producing composite steel body shaft |
| JPS63299846A (en) * | 1987-05-29 | 1988-12-07 | Hitachi Ltd | Apparatus for producing complex steel ingot |
| JPH07155932A (en) * | 1993-12-10 | 1995-06-20 | Hitachi Ltd | Production of duplex steel ingot |
| US20160045952A1 (en) * | 2014-08-13 | 2016-02-18 | Northeastern University | Method for manufacturing hollow ingot for retaining ring of large generator by electroslag remelting |
| CN105414743A (en) * | 2015-12-17 | 2016-03-23 | 中车洛阳机车有限公司 | Consumable nozzle electroslag overlaying welding repair method for roll |
| CN107262686A (en) * | 2017-06-21 | 2017-10-20 | 东北大学 | A kind of device and method for preparing compound steel ingot |
| CN108372286A (en) * | 2018-03-29 | 2018-08-07 | 东北大学 | A kind of electroslag remelting process prepares the device and method of bimetallic composite roll |
| CN108273980A (en) * | 2018-04-04 | 2018-07-13 | 安徽工业大学 | A kind of preheating consutrode electroslag remelting production composite roll method |
| CN108746562A (en) * | 2018-07-03 | 2018-11-06 | 东北大学 | Graphite electrode ring preheats the device and method that electroslag smelting casting prepares large-scale compound steel ingot |
| CN111590054A (en) * | 2020-04-28 | 2020-08-28 | 湖南力方轧辊有限公司 | Device and method for preparing bimetal clad roller by ingot drawing type electroslag remelting method |
| CN113061741A (en) * | 2021-03-18 | 2021-07-02 | 东北大学 | Electroslag remelting composite device and method for improving temperature distribution of slag bath by external magnetic field |
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| CN114619019B (en) | 2023-06-23 |
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