CN108500238B - Production method of bimetal composite roller based on electroslag remelting - Google Patents
Production method of bimetal composite roller based on electroslag remelting Download PDFInfo
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- CN108500238B CN108500238B CN201810297498.0A CN201810297498A CN108500238B CN 108500238 B CN108500238 B CN 108500238B CN 201810297498 A CN201810297498 A CN 201810297498A CN 108500238 B CN108500238 B CN 108500238B
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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
- B22D19/16—Casting in, on, or around objects which form part of the product for making compound objects cast of two or more different metals, e.g. for making rolls for rolling mills
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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
- B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
- B22D27/08—Shaking, vibrating, or turning of moulds
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Abstract
The invention discloses a production method based on an electroslag remelting bimetal composite roller, and belongs to the technical field of electroslag remelting. The invention 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 that of the upper crystallizer, the lower crystallizer is arranged at the lower part of the upper crystallizer, and the axes of the upper crystallizer and the lower crystallizer are not on the same straight line; the metal consumable electrode is arranged on the upper part of the upper crystallizer, the bottom water tank is arranged on the lower part of the lower crystallizer, and the metal consumable electrode and the bottom water tank are respectively connected with two poles of a power supply. The invention realizes the production of the bimetal composite roller with the working surface material uniformly coated on the surface of the roller core and firmly welded through the eccentric design of the electroslag remelting crystallizer, and the working surface material can be flexibly adjusted, the production is efficient, and the product quality is superior.
Description
Technical Field
The invention belongs to the technical field of electroslag remelting, and particularly relates to a production method based on an electroslag remelting bimetal composite roller.
Background
The consumption of wear-resistant parts in the industries of metallurgy, mine and the like is large, and many parts fail due to abrasion. If the whole wear-resistant parts such as the roller, the jaw plate, the hammer head and the like are made of high-hardness materials, the production cost is improved, and the machining difficulty of a non-working face is increased. For this reason, bimetal composite materials have come into play, i.e. the working surface is made of a material with high hardness, good wear resistance and high price, while the non-working surface is made of a material with high toughness or good processing performance and relatively low price, so that the bimetal composite material is economic, reasonable and safe.
The most typical and most commonly used bimetallic composites are metallurgical rolls, which are the major large tools for rolling steel. The outer layer material and the roll core of the roll are made of different materials, so that the requirements of the rolling mill on the properties of wear resistance, thermal fatigue resistance and the like of the roll body can be met, simultaneously, the obdurability of the core and the roll neck is ensured, and more importantly, the manufacturing cost of the roll is greatly reduced. Taking a high-speed steel roll as an example, if the roll is made of an integral high-speed steel material, the cost is high; if a bimetal composite roller is adopted, namely the roller core adopts low alloy steel with lower price, and the roller body adopts high-speed steel, the cost is greatly reduced.
Through retrieval, the invention has the name: a liquid electroslag roller compound device (application number: 201120453174.5, application date: 2011.11.16) comprises: the water-cooled crystallizer is provided with a channel with the inner diameter equivalent to the outer diameter of the preset composite layer of the roller to be compounded; and the upper part of the crystallizer is also provided with an intermediate holding furnace for pouring pre-melted metal liquid and slag liquid into a gap between the water-cooled crystallizer and the roller to be compounded inserted into the channel. This application is through setting up water-cooled crystallizer and to water-cooled crystallizer and waiting to topple over the middle holding furnace of fused metal liquid and slag bath in the clearance between the compound roll, just so can directly compound the roll, but the roll shaft material that the device produced and roll core material seam effect probably are unsatisfactory, and topple over the easy production of in-process metal liquid and mix with, influence the working face quality.
The roller is produced by adopting an electroslag remelting mode, and because an electroslag remelting technology is adopted, the surface of the roller core is always positioned in high-temperature slag, a thin melting layer is arranged on the surface of the roller core, and the melting layer is isolated from air under the protection of the high-temperature slag, so that the purity of the roller is ensured; meanwhile, the outer layer metal is slowly melted under the action of high-temperature slag and then is effectively welded with the surface of the roller core, so that the good metallurgical quality of a bimetal composite interface is ensured, but at present, in the field of roller production, particularly in the field of cold rollers, the whole roller is mainly used, namely, the production and use cost is higher through an electroslag remelting and re-forging process.
Therefore, the bimetal composite roller is developed by an electroslag remelting method, is applied to the field of cold rolling, can greatly reduce the production cost of the cold rolling roller, and has important significance for the development of an electroslag technology.
Disclosure of Invention
1. Technical problem to be solved by the invention
The invention aims to solve the problem that the existing bimetal composite roll production technology can not produce high-quality bimetal composite rolls efficiently, and provides a production method based on electroslag remelting bimetal composite rolls.
2. Technical scheme
In order to achieve the purpose, the technical scheme provided by the invention is as follows:
the invention relates to a production method of a bimetal composite roller based on electroslag remelting, which comprises the following steps:
step one, placing inner layer metal
Arranging a metal consumable electrode above the smelting side of an upper crystallizer, placing a roller core in a lower crystallizer to serve as inner layer metal of a composite roller, and supporting the roller core at the bottom of the lower crystallizer by a bottom water tank;
step two, electroslag remelting
Melting the remelting slag, pouring the melted remelting slag into an eccentric crystallizer to form a slag pool, inserting one end of a metal consumable electrode into the slag pool, and electrically connecting the metal consumable electrode with a bottom water tank to form an electric loop; the consumable electrode of metal is melted and refined and then enters a molten pool;
step three, outer layer metal solidification welding
And cooling and solidifying the molten metal in the molten pool and welding the molten metal on the surface of the roller core to form inner layer metal of the composite roller to obtain the bimetal composite roller.
Preferably, the eccentric 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 part of the upper crystallizer, and the axes of the upper crystallizer and the lower crystallizer are not on the same straight line.
Preferably, the inner diameter of the lower crystallizer is D, the working surface thickness of the production roll is h, the diameter of the roll core is D, and D is D-2 h.
Preferably, an electromagnetic stirring coil is arranged outside the upper crystallizer and is used for stirring the molten metal in the upper crystallizer.
Preferably, the metal consumable electrode is melted into metal liquid which enters the slag pool and then is distributed in the slag pool above the opening side through the diversion effect of the diversion dam.
Preferably, the upper end of the lower crystallizer is provided with a vibration mechanism which is used for vibrating the molten metal in the solidification process.
Preferably, the diameter of the upper crystallizer is R, the diameter of the lower crystallizer is R, and R is more than or equal to 2R.
Preferably, the included angle α between the incident flow surface of the diversion dam and the bottom end surface is 30-45 degrees, and the included angle β between the back flow surface of the diversion dam and the bottom end surface is 60-80 degrees.
Preferably, the diameter of the upper crystallizer is R, the distance from the axis of the metal consumable electrode to the circle center of the upper crystallizer is D1, and 1/2R is more than D1 and is more than or equal to 1/4R; the distance from the axle center of the lower crystallizer to the circle center of the upper crystallizer is D2, and 1/2R is more than D2 and is more than or equal to 1/4R.
3. Advantageous effects
Compared with the prior art, the technical scheme provided by the invention has the following beneficial effects:
(1) the invention relates to a production method based on an electroslag remelting bimetal composite roller, wherein a crystallizer of an electroslag remelting device is an eccentric crystallizer and is divided into 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 part of the upper crystallizer, the axes of the upper crystallizer and the lower crystallizer are not on the same straight line, and the side wall of the lower crystallizer is tangent to the side wall of the opening side of the upper crystallizer.
(2) According to the production method of the bimetal composite roller based on electroslag remelting, the electromagnetic stirring coil is arranged on the periphery of the eccentric crystallizer, and the electromagnetic stirring coil is arranged from the upper end area of the lower crystallizer to the top end of the upper crystallizer, so that a metal consumable electrode is stirred in the remelting process in a slag bath of the upper crystallizer, the temperature of the slag bath is promoted to be uniform, and meanwhile, the material of a working surface of the roller can be more uniformly coated on the surface of a roller core of the roller.
(3) The invention relates to a production method of a bimetal composite roller based on electroslag remelting, wherein an electromagnetic stirring coil is arranged on the periphery of an eccentric crystallizer, the electromagnetic stirring coil is arranged from the upper end area of a lower crystallizer to the top end of the upper crystallizer, the flowing of molten metal in the area is accelerated by electromagnetic stirring in the upper end area of the lower crystallizer, so that the molten pool can be prevented from refining grains, and the solidification quality of the working surface of the roller is improved.
(4) According to the production method of the bimetal composite roller based on electroslag remelting, a diversion dam is arranged in an upper crystallizer along the edge of the opening side, molten metal near a metal consumable electrode can be diverted to a far place through the diversion dam, the coating of a roller working layer of a roller core deviating from the metal consumable electrode surface is accelerated, and the material of the roller working surface is promoted to be coated on the surface of the roller core more uniformly.
(5) The invention relates to a production method of a bimetal composite roller based on electroslag remelting.
Drawings
FIG. 1 is a step diagram of a production method of a bimetal composite roller based on electroslag remelting, according to the invention;
FIG. 2 is a schematic structural diagram of an electroslag remelting device for producing bimetal composite rollers in an eccentric manner;
FIG. 3 is a top view of an electroslag remelting device for eccentrically producing bimetal composite rolls in the invention;
FIG. 4 is a schematic structural diagram of an eccentric double-metal composite roller electroslag remelting device according to the present invention;
FIG. 5 is a top view of an eccentric electroslag remelting device for producing bimetal composite rollers in the invention;
FIG. 6 is an enlarged structural diagram of a cross section of a diversion dam of an eccentric type production bimetal composite roller electroslag remelting device.
FIG. 7 is a schematic structural view of embodiment 3;
FIG. 8 is a schematic structural view of example 4;
FIG. 9 is a schematic structural view of example 5.
The reference numerals in the schematic drawings illustrate:
110. an upper crystallizer; 111. a diversion dam; 1112. a drainage groove; 111A, the incident flow surface; 111B, a back flow surface; 112. an opening side; 113. smelting side; 120. a lower crystallizer; 121. a vibration mechanism;
200. an electromagnetic stirring coil; 210. a lower stirring coil;
300. a bottom water tank;
400. a transformer;
510. a metal consumable electrode; 520. a roll core; 530. a slag pool; 540. a molten bath.
Detailed Description
The detailed description and exemplary embodiments of the invention will be better understood when read in conjunction with the appended drawings, where the elements and features of the invention are identified by reference numerals.
Example 1
Referring to fig. 2, 3, 4 and 5, the electroslag remelting device for rapidly producing the bimetal composite roller of the embodiment comprises an eccentric crystallizer, a bottom water tank 300 and a metal consumable electrode 510; the eccentric crystallizer comprises an upper crystallizer 110 and a lower crystallizer 120, wherein the axes of the upper crystallizer 110 and the lower crystallizer 120 are not on the same straight line, and the lower crystallizer 120 is arranged at the lower part of the upper crystallizer 110; the bottom of the upper crystallizer 110 comprises an opening side 112 and a smelting side 113, the lower part of the opening side 112 is connected with the lower crystallizer 120, and the shape of the opening side 112 is matched with the upper end opening surface of the lower crystallizer 120; the bottom surface of the upper crystallizer 110 except the opening side 112 and other areas are smelting sides 113, and metal consumable electrodes 510 are vertically arranged above the smelting sides 113; when in use, the roller core 520 is arranged along the axial lead of the lower crystallizer 120, and the roller core 520 is the inner layer metal material of the metal composite roller.
In the electroslag remelting smelting process, if the distance between the metal consumable electrode 510 and the roller core 520 is too small, the high temperature near the metal consumable electrode 510 can excessively melt the roller core 520, and the welding between the working surface material of the lower roller and the roller core 520 is affectedThe firmness of the welding of the roll working surface material and the roll core 520 is affected, and the diameter of the roll core 520 is limited in the prior art for avoiding the occurrence of the condition, so that the thickness of the roll working surface is limited in the production process. In this embodiment, since the axial lines of the upper mold 110 and the lower mold 120 are not on the same straight line, the axial line of the metal consumable electrode 510 and the axial line of the roller core 520 are not on the same straight line, the metal consumable electrode 510 and the roller core 520 do not touch each other, the diameter of the upper mold 110 is Φ, and the diameter of the lower mold 120 is Φ
In this embodiment, the selection
The distance from the axis of the metal consumable electrode 510 to the center of the upper mold 110 is D1, 1/2 Φ > D1 is equal to or greater than 1/4 Φ, D1 is preferably 1/4 Φ in this embodiment, the distance from the axis of the lower mold 120 to the center of the upper mold 110 is D2, 1/2 Φ > D2 is equal to or greater than 1/4 Φ, and D2 is preferably 1/4 Φ in this embodiment. The distance between the metal consumable electrode 510 and the roller core 520 is increased by the arrangement that the side wall of the lower crystallizer 120 is tangent to the side wall of the opening side 112 of the upper crystallizer 110, so that the metal consumable electrode 510 is not influenced by the position and the size of the roller core 520 in the smelting process, the roller cores 520 with different diameters are placed without contacting the metal consumable electrode 510 to influence the melting of the metal consumable electrode 510, the thickness of a working surface of a roller can be adjusted at will by changing the diameter of the roller core 520, the inner diameter of the lower crystallizer 120 is D, the thickness of the working surface of the roller is h, the diameter of the roller core 520 is D, and D is D-2 h; the placing mode improves the quality of the produced roller, in the electroslag remelting process, the temperature of the contact part of the metal consumable electrode 510 and the slag bath 530 is higher, the axial lead distance between the metal consumable electrode 510 and the roller core 520 is far, the welding of the working surface material of the roller below and the roller core 520 can be prevented from being influenced by the excessive melting of the surface of the roller core 520 by the slag bath 530, the working surface material of the roller and the roller core 520 are firmly welded, and the quality of the roller is ensured.
The periphery of the eccentric crystallizer of this embodiment is provided with the electromagnetic stirring coil 200, the frequency of the electromagnetic stirring coil 200 in this embodiment is 2-10Hz, preferably 5Hz in this embodiment, and the action range of the electromagnetic stirring coil 200 is in the slag bath 530 of the upper crystallizer 110. In the slag pool 530 of the upper crystallizer 110, the metal consumable electrode 510 remelts in the slag pool 530 to form molten metal which is stirred by the stirring action of the electromagnetic stirring coil 200, so that the molten metal is uniformly distributed in the slag pool 530, and the material of the working surface of the roller can be more uniformly coated on the surface of the roller core 520.
In the upper mold 110 of this embodiment, a diversion dam 111 is disposed on a side of the opening side 112 close to the consumable electrode 510, and the diversion dam 111 is arc-shaped, in this embodiment, the center of the diversion dam 111 is on a straight line between the axis of the consumable electrode 510 and the axis of the lower mold 120, the arc length of the diversion dam 111 is 1/4 of the circumference, and the height of the diversion dam 111 is 1/4 of the inner diameter of the lower mold 120.
The consumable electrode 510 is melted in the slag bath 530 to diffuse the molten metal toward the roller core 520 in the lower crystallizer 120, after the guide dam 111 is added, the molten metal impacts the guide dam 111, and due to the guide effect of the guide dam 111, a part of the molten metal flows to the two sides of the guide dam 111 along the arc direction of the guide dam 111, so that the molten metal flows farther, the coating of the roller working layer of the roller core 520 away from the consumable electrode 510 is accelerated, and the material of the roller working surface is uniformly coated on the surface of the roller core 520.
The external vibrating mechanism 121 that has been equipped with in lower crystallizer 120 upper end of this embodiment, vibrating mechanism 121's scope of action is molten bath 540 position, vibrating mechanism 121 encircles the setting outside lower crystallizer 120, for strikeing the vibration, the molten metal drips to solidify behind the molten bath 540, inside crystal begins nucleation length, vibrating mechanism 121 strikes the vibration effect, the vibration wave spreads into in the molten bath 540, the part is being broken after the crystal texture that grows up receives the vibration, produce more nucleation cores, form the better crystal texture of performance.
The bottom water tank 300 of this embodiment is disposed below the lower mold 120 and connected to the roller core 520, the bottom water tank 300 of this embodiment is made of copper, the roller core 520 moves downward, the bottom water tank 300 and the metal consumable electrode 510 are connected to a power source, the power source is an ac power source in this embodiment, the transformer 400 transforms the voltage, and the bottom water tank 300 and the metal consumable electrode 510 form an electrical circuit.
Example 2
As shown in fig. 6, the present embodiment is substantially the same as embodiment 1, except that in the present embodiment, an angle α between a flow-facing surface 111A of the flow guide dam 111 and a bottom surface is 45 °, an angle β between a back flow surface 111B of the flow guide dam 111 and the bottom surface is 70 °, the height of the flow guide dam 111 is 1/4 of a distance from the bottom surface of the upper mold 110 to the bottom surface of the consumable electrode 510, when the molten metal impacts on the flow guide dam 111, a portion of the molten metal that is not guided directly crosses over the top of the flow guide dam 111, the top of the flow guide dam 111 in the cross-sectional direction is circular arc, the molten metal is more likely to cross the top of the flow guide dam 111, an angle α between the flow-facing surface 111A of the flow guide dam 111 and the bottom surface is smaller than an angle β between the back flow surface 111B of the flow guide dam 111 and the bottom surface, when the molten metal flows through the flow-facing surface 111A, the molten metal has a smaller gradient and is easier to pass through, the molten metal if the molten metal flows toward the back flow surface 111B, the molten metal has a larger gradient and thus the molten metal is more likely to be prevented from flowing back to the opening side, and the rolls 112 are more likely to be coated, thereby increasing the production efficiency of.
Example 3
As shown in fig. 7, this embodiment is basically the same as embodiment 1 except that: according to the electroslag remelting device for quickly producing the bimetal composite roller, the lower stirring coil 210 is arranged below the electromagnetic stirring coil 200, the lower stirring coil 210 is also used for electromagnetic stirring, the stirring action range of the lower stirring coil 210 comprises the molten pool 540 and a region nearby the molten pool 540, the temperature of the region nearby the molten pool 540 is lower, the temperature of molten metal in the region is difficult to control, the melting process is easy to solidify, and the melting process is interrupted, after the stirring action of the lower stirring coil 210, the interactive flowing of the molten metal in the region and the molten metal with higher temperature above the region is promoted, and the reduction of the temperature in the region is relieved; the molten pool 540 flows under the stirring action of the lower stirring coil 210, so that the produced columnar crystal is broken, more nucleation cores are generated, and the transformation of the columnar crystal to the isometric crystal is promoted. The quality of the working surface of the roller is improved.
Example 4
As shown in fig. 8, this embodiment is substantially the same as embodiment 1 except that the flow guide dam 111 is disposed with the incident surface 111A facing the flow direction of the molten metal. Under the action of the electromagnetic stirring coil 200, the molten metal in the slag pool 530 makes a spiral centripetal motion, the molten metal is stirred in a rotating mode, after the molten metal impacts the incident flow surface 111A of the diversion dam 111, due to the diversion effect, part of the molten metal moves towards the edge of the upper crystallizer 110, the probability that the molten metal moves to the opening side 112 is increased, and the metal at the opening side 112 is promoted to be gathered and uniform.
Example 5
Referring to fig. 9, this embodiment is basically the same as embodiment 1 except that: in the electroslag remelting device for rapidly producing the bimetal composite roller according to this embodiment, the diversion dam 111 is provided with the drainage groove 1112, and in this embodiment, the height of the bottom of the drainage groove 1112 is 1/2 of the diversion dam 111. The part of the molten metal guided to the two sides of the guiding dam 111 by the guiding dam 111 can be directly guided into the opening side 112 through the guiding groove 1112, so as to promote the accumulation and uniformity of the molten metal at the opening side 112.
According to the method for producing the bimetal composite roller by adopting the electroslag remelting device, the roller core 520 is inserted into the lower crystallizer 120, the roller core 520 is used as inner layer metal of the composite roller, the bottom of the metal consumable electrode 510 is inserted into the upper crystallizer 110, and the metal consumable electrode 510 is melted and welded on the surface welded on the roller core 520, so that the bimetal composite roller is obtained.
The specific implementation steps of examples 1, 2 and 3 are:
step one, equipment installation
Arranging a metal consumable electrode 510 above the smelting side 113 of the upper crystallizer 110, arranging a roller core 520 in the lower crystallizer 120, supporting the roller core 520 at the bottom of the lower crystallizer 120 by a bottom water tank 300, and electrically connecting the bottom water tank 300 with the metal consumable electrode 510 to form an electric loop;
step two, electroslag remelting
The remelting slag is poured into an eccentric crystallizer after being melted to form a slag pool 530, one end of a metal consumable electrode 510 is inserted into the slag pool 530, the metal consumable electrode 510 is melted to form molten metal which is uniformly distributed in the slag pool 530 above the opening side 112 of the upper crystallizer 110 and uniformly falls into a molten pool 540;
step three, roller welding and solidification
The molten metal in the molten pool 540 is cooled and solidified, welded to the surface of the roll core 520, and ingot drawing is performed by continuously pulling the bottom water tank 300, so that a finished roll product is obtained.
The invention has been described in detail hereinabove with reference to specific exemplary embodiments thereof. It will, however, be understood that various modifications and changes may be made without departing from the scope of the invention as defined in the appended claims. The detailed description and drawings are to be regarded as illustrative rather than restrictive, and any such modifications and variations are intended to be included within the scope of the present invention as described herein. Furthermore, the background is intended to be illustrative of the state of the art as developed and the meaning of the present technology and is not intended to limit the scope of the invention or the application and field of application of the invention.
The invention has been described in detail hereinabove with reference to specific exemplary embodiments thereof. It will, however, be understood that various modifications and changes may be made without departing from the scope of the invention as defined in the appended claims. The detailed description and drawings are to be regarded as illustrative rather than restrictive, and any such modifications and variations are intended to be included within the scope of the present invention as described herein. Furthermore, the background is intended to be illustrative of the state of the art as developed and the meaning of the present technology and is not intended to limit the scope of the invention or the application and field of application of the invention.
Claims (5)
1. A production method based on electroslag remelting bimetal composite roll is characterized by comprising the following steps: the method comprises the following steps:
step one, placing inner layer metal
Arranging a metal consumable electrode (510) above the smelting side (113) of the upper crystallizer (110), placing a roller core (520) in the lower crystallizer (120) to serve as inner layer metal of a composite roller, and supporting the roller core (520) at the bottom of the lower crystallizer (120) by a bottom water tank (300);
step two, electroslag remelting
The remelting slag is poured into an eccentric crystallizer to form a slag pool (530), one end of a metal consumable electrode (510) is inserted into the slag pool (530), the metal consumable electrode (510) is electrically connected with a bottom water tank (300) to form an electric loop, the metal consumable electrode (510) is melted and refined and then enters a molten pool (540), the eccentric crystallizer comprises an upper crystallizer (110) and a lower crystallizer (120), the diameter of the lower crystallizer (120) is smaller than that of the upper crystallizer (110), the lower crystallizer (120) is arranged at the lower part of the upper crystallizer (110), the axes of the upper crystallizer (110) and the lower crystallizer (120) are not on the same straight line, the diameter of the upper crystallizer (110) is phi, the diameter of the lower crystallizer (120) is phi, phi is not less than 2 phi, the distance from the axis of the metal consumable electrode (510) to the center of the upper crystallizer (110) is D1, 1/2 phi is not less than D48363, the distance from the axis of the lower crystallizer (120) to the center of the upper crystallizer (110) is D2, 1/2 is not less than D357, the arc-shaped flow guiding dam surface 357 is more close to the upper side of the upper dam (111), the guide dam surface of the guide dam (510) is arranged on the side of the upper dam, the guide roll surface of the guide dam, the guide roll is arranged on the side of the guide dam (111) and the guide roll, the guide roll is arranged on the guide dam (510) and the guide roll, the guide roll is arranged on the guide side of the guide dam (510) after the guide roll, the guide roll (510) is arranged, the guide roll (510) and the guide roll (510) is arranged on the guide roll, the guide roll is;
step three, outer layer metal solidification welding
And cooling and solidifying the molten metal in the molten pool (540) and welding the molten metal on the surface of the roller core (520) to form the inner layer metal of the composite roller to obtain the bimetal composite roller.
2. The production method of bimetal composite roller based on electroslag remelting as claimed in claim 1, characterized in that: the diameter of the lower crystallizer (120) is phi, the thickness of the working surface of the production roller is h, the diameter of the roller core (520) is d, and d = phi-2 h.
3. The production method based on electroslag remelting bimetal composite roller, according to claim 1, is characterized in that: an electromagnetic stirring coil (200) is arranged on the outer side of the upper crystallizer (110), and the electromagnetic stirring coil (200) is used for stirring the molten metal in the upper crystallizer (110).
4. The production method based on electroslag remelting bimetal composite roller, according to claim 1, is characterized in that: and the upper end of the lower crystallizer (120) is provided with a vibration mechanism (121), and the vibration mechanism (121) is used for vibrating molten metal in the solidification process.
5. The production method based on the electroslag remelting bimetal composite roller is characterized in that the included angle between the incident flow surface (111A) of the diversion dam (111) and the bottom end surface is α =30 ° -45 °, and the included angle between the back flow surface (111B) of the diversion dam (111) and the bottom end surface is β =60 ° -80 °.
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| CN109374147B (en) * | 2018-12-07 | 2020-10-09 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for measuring ingot casting temperature distribution in electroslag remelting process |
| CN109604565A (en) * | 2018-12-24 | 2019-04-12 | 湖南三泰新材料股份有限公司 | A kind of device and preparation method of electroslag melting stainless steel composite base |
| CN109604564A (en) * | 2019-01-11 | 2019-04-12 | 潍坊市众诚佳合环保科技股份有限公司 | A kind of roll repair welding technique based on electroslag remelting |
| CN110465638A (en) * | 2019-08-06 | 2019-11-19 | 山东天物成型科技有限公司 | Bimetallic cutter ring of composite hob cutter production technology and its productive power slag centrifugal device |
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