CN105316488A - High-speed low-inclusion electroslag remelting device and remelting method thereof - Google Patents
High-speed low-inclusion electroslag remelting device and remelting method thereof Download PDFInfo
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Abstract
The invention discloses a high-speed low-inclusion electroslag remelting device and a remelting method thereof and belongs to the field of remelting of electroslag. The electroslag remelting device comprises a consumable electrode, a crystallizer, an ultrasonic wave generator and an electrode driving mechanism, wherein one end of a dummy electrode of the electrode driving mechanism is fixedly connected to the consumable electrode; the other end of the dummy electrode is connected to a bearing of a fixing device; an adjustable-speed motor controls the dummy electrode to rotate; one end of a transformer is electrically connected to the dummy electrode through an electric brush, so that the consumable electrode rotates continuously and is affected by ultrasonic wave from the bottom at the same time in the remelting process. Through the remelting method based on the remelting device, the melting of the consumable electrode is accelerated; the energy consumption is reduced; the prepared electroslag ingots are uniform in structures, few in inclusions and high in quality.
Description
Technical field
The present invention relates to electroslag remelting technique field, more particularly, relate to a kind of high speed, the electroslag remelting device of low inclusion and remelting method thereof.
Background technology
Along with the development of machinery industry, the requirement of people to steel quality is more and more higher.Improve the quality of steel mainly from following two aspects: (1), reduction are dissolved in the content of gas and inclusion steel, thus obtain the higher steel of cleanliness factor; (2), be reduced in produce in the process of setting of molten steel component segregation, uneven microstructure, shrinkage cavity and the defect such as loose, thus obtain the crystal structure of dense uniform.
Esr process is a kind of remelting processing being applied to the production of high-quality steel conventional at present.Because in reflow process, molten drop is drop by drop by certain thickness molten slag layer, the specific surface area of molten drop is large, therefore steel-slag interfacial area is increased, nonmetallic impurity in slag adsorbing metal drop and other abilities be mingled with increase greatly, serve the effect of wash heat, with the steel that general method is smelted, the non-metallic inclusion of 80% ~ 90% can be removed after re melting process; Simultaneously due to crystallizer and the strong cooling effect of water cooling plate, the speed of cooling of esr process very greatly, makes the abundant diffusion in solid phase and liquid phase be suppressed, decreases component segregation, improve the crystal structure of steel ingot.And esr process all can controlled in varying degrees to the chemical composition of product, the form, crystallization direction, dendrite interval, microsegregation etc. of inclusion, electroslag remelting technique is having irreplaceable effect in modern industry is produced.Esr, as the extraordinary metallurgical method of one, collects refining and freezes solidly on one, and the material after esr has the advantage such as high purity, solidified structure densification, and thus this method occupies critical role in production high quality material.
But also there are some problems in electro-slag re-melting method: production efficiency is low on the one hand, power consumption is high, and the remelt speed of current electric slag refusion ingot calculates as follows:
V
molten=(0.7 ~ 0.8) D
knot
V in formula
molten-melting rate (kg/hour);
D
knot-crystallizer diameter (millimeter).
Particularly small electrical slag hearth power consumption is up to 1700 ~ 1900KWh/t for a lot of electroslag furnace at present, and melting rate is too low, not only have impact on production efficiency, and power consumption increases, and have impact on the economic benefit of enterprise greatly;
On the other hand, although esr process is conducive to the removal of inclusion, under process parameter control improperly situation, the inclusion of larger particles may still be produced.Current research shows, utilizes the characteristic that ultrasonic wave is intrinsic, using ultrasonic wave as outfield to the refinement of degassed, the solidified structure of molten metal and prevent segregation etc. from having good promoter action.But in prior art, effectively for how in esr process, apply ultrasonic wave, thus improve that to smelt steel grade quality be a puzzlement metallurgy industry difficult problem for many years always.Therefore, how high-level efficiency, high-qualityly carry out smelting steel, be a great problem of field of metallurgy.
Find through retrieval, the relevant technical scheme utilizing ultrasonic wave to combine with esr has been there is in prior art, as China Patent No.: 201520137985.2, authorized announcement date: on July 8th, 2015, invention and created name is: one imports hyperacoustic device in esr, this patent formula comprises transformer, wire, electrode jaw, consumable electrode and crystallizer, also comprise ultrasonic wave generating mechanism, sidewall guided wave probe and bottom guided wave probe, crystallizer cooling stave sidewall installs row's sidewall guided wave probe in the height direction equally spacedly, one in above-mentioned row's sidewall guided wave probe is connected with the output terminal of a ultrasonic wave generating mechanism, upper installation three bottom guided wave probe bottom crystallizer cooling stave, above-mentioned three bottom guided wave probes are connected with the output terminal of three ultrasonic wave generating mechanisms respectively, ultrasonic wave generating mechanism comprises ultrasonic power, ultrasonic transducer and horn.Although this patent formula can combine esr with ultrasonic technology, raising the efficiency and still there is larger defect in quality.
Summary of the invention
1. invent the technical problem that will solve
The object of the invention is to overcome in prior art that remelting efficiency is low, power consumption is high, there is the deficiency of inclusion, provide a kind of high speed, the electroslag remelting device of low inclusion and remelting method thereof, adopt technical scheme of the present invention, consumable electrode melting can be accelerated, reduce energy consumption, and prepared ESR ingot homogeneous microstructure, inclusion are few, there is good quality.
2. technical scheme
For achieving the above object, technical scheme provided by the invention is:
The electroslag remelting device of a kind of high speed of the present invention, low inclusion, comprise transformer, consumable electrode, crystallizer and be arranged on the ultrasonic generator of crystalliser feet, also comprise electrode drive mechanism, described electrode drive mechanism forms primarily of stationary installation, buncher and dummy electrode, described dummy electrode one end and consumable electrode are connected, the dummy electrode the other end is connected with the bearing in stationary installation, and described buncher is installed on the securing means, controls dummy electrode rotate by buncher; Described transformer one end is electrically connected with crystallizer, and the transformer the other end is electrically connected with dummy electrode by brush.
As further improvement of the present invention, described ultrasonic generator comprises ultrasonic wave guided wave bar, horn, transverter and ultrasonic power, described ultrasonic power, transverter, horn and ultrasonic wave guided wave bar are electrically connected successively, and horn and ultrasonic wave guided wave bar are fixed.
As further improvement of the present invention, described ultrasonic wave guided wave bar is vertically arranged on the tank center of crystalliser feet, and ultrasonic wave guided wave bar is corresponding with consumable electrode position.
As further improvement of the present invention, described stationary installation is primarily of transverse arm and column composition, and described column is vertically installed, and transverse arm one end is connected on column, and the transverse arm the other end installs bearing and buncher.
As further improvement of the present invention, described transverse arm is provided with the threaded hole of vertical direction near one end of column, in threaded hole, be provided with drive lead screw, the bottom of drive lead screw is connected with the output shaft of lifting motor, controls transverse arm move up and down on drive lead screw by lifting motor.
The electro-slag re-melting method of a kind of high speed of the present invention, low inclusion, carries out remelting according to the following steps:
Step one, Graphite Electrodes slag; By Graphite Electrodes slag in the crystallizer of electroslag remelting device, after remelting slag fusing, remove Graphite Electrodes, consumable electrode is sent into energising in crystallizer and start melting;
Step 2, consumable electrode rotate; When removing Graphite Electrodes after remelting slag fusing, namely start buncher, before consumable electrode inserts slag bath melting, be adjusted to setting speed;
Step 3, after remelting in step 2 is stable, opens ultrasonic power, set ultrasonic power, launch ultrasonic wave, enter melting state; In slag bath, add the deoxidation of Al-Mn-Si alloy, add-on is 2-5Kg/t steel simultaneously;
After step 4, step 3 complete, powered-down, buncher and ultrasonic generator, remelting completes.
As further improvement of the present invention, in step one, Graphite Electrodes is removed and is sent into crystallizer smelting time to consumable electrode and be no more than 1.5min.
As further improvement of the present invention, the setting speed scope in step 2 is 10-30r/min.
As further improvement of the present invention, the ultrasonic power density launched in step 3 is 5 ~ 15W/cm
2, frequency is 21KHz.
As further improvement of the present invention, when increasing the rotating speed of buncher, turn down ultrasonic power density; When turning down the rotating speed of buncher, increase ultrasonic power density.
3. beneficial effect
Adopt technical scheme provided by the invention, compared with prior art, there is following beneficial effect:
(1) electroslag remelting device of a kind of high speed of the present invention, low inclusion, consumable electrode is connected with dummy electrode, dummy electrode is connected on transverse arm by bearing, and drive consumable electrode to rotate by buncher, under the turning effort of consumable electrode, the effect of frictional force and gravity that liquid metal is subject to slag bath pools small droplets to consumable electrode conical nose fast, thus improves production efficiency, reduces energy consumption;
(2) electro-slag re-melting method of a kind of high speed of the present invention, low inclusion, electroslag remelting technique is combined with ultrasonic technology, turning effort can accelerate the convergence of consumable electrode drop, then drip again under hyperacoustic oscillating action and enter metal pool through slag bath, thus during molten drop drippage, in its volume ratio traditional technology, the volume of drop is little, when the size of inclusion is greater than liquid metal film thickness will exposed out with slag contacts, thus inclusion is adsorbed by slag, improve the purity of production ESR ingot;
(3) electro-slag re-melting method of a kind of high speed of the present invention, low inclusion, transverse arm is provided with threaded hole, in threaded hole, drive lead screw is installed, control whole transverse arm by screw mandrel to move up and down, and then realize the up-and-down movement of consumable electrode, the lifting demand of consumable electrode can be met, the rotational motion of electrode can not be affected again, achieve both effective combinations.
Accompanying drawing explanation
Fig. 1 is the structural representation of electroslag remelting device of a kind of high speed of the present invention, low inclusion;
Fig. 2 is the structural representation of stationary installation in the present invention.
Label declaration in schematic diagram: 1, transverse arm; 2, column; 201, lifting motor; 202, drive lead screw; 3, buncher; 4, dummy electrode; 5, bearing; 6, brush; 7, consumable electrode; 8, crystallizer; 9, slag bath; 10, water tank; 11, ultrasonic wave guided wave bar; 12, horn; 13, transverter; 14, ultrasonic power; 15, transformer.
Embodiment
For understanding content of the present invention further, the present invention is described in detail in conjunction with the accompanying drawings and embodiments.
Embodiment 1
Composition graphs 1, a kind of high speed of the present embodiment, the electroslag remelting device of low inclusion, the ultrasonic generator comprising transformer 15, consumable electrode 7, crystallizer 8, electrode drive mechanism and be arranged on bottom crystallizer 8.Wherein, electrode drive mechanism forms primarily of stationary installation, buncher 3 and dummy electrode 4, and dummy electrode 4 is cylindrical metal material, and dummy electrode 4 one end and metal consumable electrode 7 are connected, and dummy electrode 4 axle center and consumable electrode 7 axis coinciding; Dummy electrode 4 the other end is connected with the bearing 5 in stationary installation, and dummy electrode 4 can be rotated in bearing 5.The epimere of dummy electrode 4 protrudes from the upside of bearing 5, and is connected with the buncher 3 installed on the securing means by deceleration device, controls dummy electrode 4 rotate by buncher 3.
Transformer 15 one end in the present embodiment is connected with the water tank 10 of bottom, and transformer 15 the other end is electrically connected with dummy electrode 4 by brush 6.The dummy electrode that common consumable electrode connects can for square or circular, its Main Function is conduction, and consumable electrode 7 in the present embodiment, will be made to rotate, and remelting can be carried out normally under rotary state, therefore need unique structure design, while rotation, meet remelting demand.Because dummy electrode 4 is operationally in rotary state, brush 6 must be set to ensure still can keep switch-on regime when dummy electrode 4 rotates, guarantee normally carrying out of melting.
In order to install dummy electrode 4, set stationary installation forms primarily of transverse arm 1 and column 2, and described column 2 is provided with vertical installation, and transverse arm 1 one end is connected on column 2, transverse arm 1 the other end is provided with above-mentioned bearing 5 and buncher 3, is respectively used to install dummy electrode 4 and control it rotate.Further, along with the continuous fusing of consumable electrode 7, consumable electrode 7 progressively weakens with the contact condition of slag liquid, and in order to make consumable electrode 7 keep certain contacting with slag liquid all the time, consumable electrode 7 should make consumable electrode 7 suitably decline while fusing.Require that consumable electrode 7 lowering speed and its burn-off rate match in theory.The too fast meeting that declines causes pool depth excessively dark, worsens solidified structure, is also unfavorable for the removal of inclusion simultaneously; Declined and electrode and slag liquid contact condition can be caused slowly to worsen, made smelting furnace cisco unity malfunction.So the present embodiment is provided with the threaded hole of vertical direction at transverse arm 1 near one end of column 2, drive lead screw 202 is installed in threaded hole, as shown in Figure 2, the bottom of drive lead screw 202 is connected with the output shaft of lifting motor 201, controls transverse arm 1 move up and down on drive lead screw 202 by lifting motor 201.When drive lead screw 202 rotates, transverse arm 1 can rise or decline, and then drives dummy electrode 4 to be elevated, and constantly in slag liquid, send into electrode by the method for integral elevating, rotation and lifting are independent of each other, and net effect is better.The rotating speed of above-mentioned lifting motor 201 by PLC system regulating and controlling, to reach the thawing speed of consumable electrode 7 and its lowering speed close to the object be synchronized with the movement.Also transverse arm 1 integral elevating is made by other modes.
Ultrasonic generator in the present embodiment comprises ultrasonic wave guided wave bar 11, horn 12, transverter 13 and ultrasonic power 14, ultrasonic power 14, transverter 13, horn 12 and ultrasonic wave guided wave bar 11 are electrically connected successively, and horn 12 and ultrasonic wave guided wave bar 11 are fixed.Described ultrasonic wave guided wave bar 11 is vertically arranged on bottom crystallizer 8, and ultrasonic wave guided wave bar 11 is corresponding with consumable electrode 7 position.Exist in prior art and three ultrasonic wave guided wave bars are set, cause produced cavitation and acoustic streaming effect be able to partly cancel out each other, do not apply a powerful ultrasonic wave guided wave bar 11 on the contrary more effective; If only apply ultrasonic wave in bottom, and do not have other measure simultaneously, metal drop size is still comparatively large, therefore compared with traditional esr, does not have the effect of further refining.
In addition, all there is refrigerating unit surrounding and the bottom of crystallizer 8, and the water tank 10 bottom crystallizer 8 is used for lowering the temperature to molten steel built with water coolant.Use after ultrasonic wave, hyperacoustic cavitation effect can make current be in turbulence state, prevents fouling, and cooling performance is better, can crystal grain thinning, improves the internal organizational structure of ESR ingot.
During use, consumable electrode 7 and dummy electrode 4 are welded together, ultrasonic wave guided wave bar 11 is welded on bottom water tank 10 central part.Because consumable electrode 7 rotates in slag bath, the conehead part of the electrode tip of consumable electrode 7 and slag bath 9 is made to produce frictional force, and the top that the liquid metal film of the conehead partial melting of consumable electrode 7 electrode tip can be focused to conehead in advance under the effect of frictional force and gravity pools small droplets, then drip again under hyperacoustic oscillating action and enter metal pool through slag bath, therefore the effect that electrode rotary-ultrasonic wave is common can accelerate the drippage of drop to metal pool of metal consumable electrode 7, thus improves production efficiency, reduces power consumption.On the other hand, the rotation of dummy electrode 4 makes the liquid metal film of consumable electrode 7 conehead part converge to conehead top in advance, which results in the reduction of liquid metal film thickness, therefore when the size of inclusion is greater than liquid metal film thickness, will exposed out with slag contacts, thus inclusion to be adsorbed; The small droplets simultaneously converging to conehead top comes off in advance through slag bath under hyperacoustic effect, instead of form larger size and overcome surface tension and come off, therefore under ultrasonic vibration effect, drop size diminishes, specific surface area increases, the contact area of itself and slag is caused to increase, improve the dynamic conditions of impeller in slurry pump, be conducive to the removal of inclusion.
Based on the electroslag remelting device of above-mentioned a kind of high speed, low inclusion, the present embodiment additionally provides the electro-slag re-melting method of a kind of high speed, low inclusion, mainly carries out remelting according to following steps:
Step one, Graphite Electrodes slag; By Graphite Electrodes slag in the crystallizer 8 of electroslag remelting device, after remelting slag fusing, remove Graphite Electrodes, consumable electrode 7 is sent into energising in crystallizer 8 and start melting;
Step 2, consumable electrode rotate; When removing Graphite Electrodes after remelting slag fusing, in 1.5min, namely start buncher 3, to the 10r/min rotating speed being adjusted to setting before consumable electrode 7 inserts slag bath melting;
Step 3, after remelting in step 2 is stable, open ultrasonic power 14, set ultrasonic power, its power density is 15W/cm
2, frequency is 21KHz, launches ultrasonic wave, enters melting state; In slag bath, add the deoxidation of Al-Mn-Si alloy, add-on is 3Kg/t steel simultaneously;
After step 4, step 3 complete, powered-down, buncher 3 and ultrasonic generator, remelting completes.
Set(ting)value and the ultrasonic power set(ting)value of rotating speed are inverse relation, and when namely rotating speed is large, ultrasonic power is less, similar on the contrary.When rotating speed is larger, droplet size is less, and less ultrasonic power combines with rotating speed and drop can be made to depart from, thus raises the efficiency; And rotating speed less time, droplet size is comparatively large, needs larger ultrasonic power to combine with rotating speed and drop just can be made to depart from consumable electrode.
Embodiment 2
A kind of high speed of the present embodiment, the electro-slag re-melting method of low inclusion, its basic step is identical with embodiment 1, and its difference is: in the present embodiment, consumable electrode keeps the rotating speed of 20r/min, and ultrasonic power is adjusted to 10W/cm
2, in slag bath, add the deoxidation of Al-Mn-Si alloy, add-on is 5Kg/t steel.
Embodiment 3
A kind of high speed of the present embodiment, the electro-slag re-melting method of low inclusion, its basic step is identical with embodiment 1, and its difference is: in the present embodiment, consumable electrode keeps the rotating speed of 30r/min, and ultrasonic power is adjusted to 5W/cm
2.
Schematically above be described the present invention and embodiment thereof, this description does not have restricted, and also just one of the embodiments of the present invention shown in accompanying drawing, actual structure is not limited thereto.So, if those of ordinary skill in the art enlightens by it, when not departing from the invention aim, designing the frame mode similar to this technical scheme and embodiment without creationary, all should protection scope of the present invention be belonged to.
Claims (10)
1. a high speed, the electroslag remelting device of low inclusion, comprise transformer (15), consumable electrode (7), crystallizer (8) and the ultrasonic generator be arranged on bottom crystallizer (8), it is characterized in that: also comprise electrode drive mechanism, described electrode drive mechanism is primarily of stationary installation, buncher (3) and dummy electrode (4) composition, described dummy electrode (4) one end and consumable electrode (7) are connected, dummy electrode (4) the other end is connected with the bearing (5) in stationary installation, described buncher (3) is installed on the securing means, control dummy electrode (4) by buncher (3) to rotate, described transformer (15) one end is connected with the water tank (10) of bottom, and transformer (15) the other end is electrically connected with dummy electrode (4) by brush (6).
2. the electroslag remelting device of a kind of high speed according to claim 1, low inclusion, it is characterized in that: described ultrasonic generator comprises ultrasonic wave guided wave bar (11), horn (12), transverter (13) and ultrasonic power (14), described ultrasonic power (14), transverter (13), horn (12) and ultrasonic wave guided wave bar (11) are electrically connected successively, and horn (12) and ultrasonic wave guided wave bar (11) are fixed.
3. the electroslag remelting device of a kind of high speed according to claim 2, low inclusion, it is characterized in that: described ultrasonic wave guided wave bar (11) is vertically arranged on water tank (10) center of crystallizer (8) bottom, and ultrasonic wave guided wave bar (11) is corresponding with consumable electrode (7) position.
4. the electroslag remelting device of a kind of high speed according to claim 1 and 2, low inclusion, it is characterized in that: described stationary installation is primarily of transverse arm (1) and column (2) composition, described column (2) is vertically installed, transverse arm (1) one end is connected on column (2), and transverse arm (1) the other end installs bearing (5) and buncher (3).
5. the electroslag remelting device of a kind of high speed according to claim 4, low inclusion, it is characterized in that: described transverse arm (1) is provided with the threaded hole of vertical direction near one end of column (2), drive lead screw (202) is installed in threaded hole, the bottom of drive lead screw (202) is connected with the output shaft of lifting motor (201), controls transverse arm (1) move up and down on drive lead screw (202) by lifting motor (201).
6. an electro-slag re-melting method for high speed, low inclusion, is characterized in that, carries out remelting according to the following steps:
Step one, Graphite Electrodes slag; By Graphite Electrodes slag in the crystallizer (8) of electroslag remelting device, after remelting slag fusing, remove Graphite Electrodes, consumable electrode (7) is sent into energising in crystallizer (8) and start melting;
Step 2, consumable electrode rotate; When removing Graphite Electrodes after remelting slag fusing, namely start buncher (3), before consumable electrode (7) inserts slag bath melting, be adjusted to setting speed;
Step 3, after remelting in step 2 is stable, opens ultrasonic power (14), set ultrasonic power, launch ultrasonic wave, enter melting state;
After step 4, step 3 complete, powered-down, buncher (3) and ultrasonic generator, remelting completes.
7. the electro-slag re-melting method of a kind of high speed according to claim 6, low inclusion, is characterized in that: in step one, Graphite Electrodes is removed and is no more than 1.5min to consumable electrode (7) feeding crystallizer smelting time interval.
8. the electro-slag re-melting method of a kind of high speed according to claim 6, low inclusion, is characterized in that: the setting speed scope in step 2 is 10-30r/min.
9. the electro-slag re-melting method of a kind of high speed according to claim 6, low inclusion, is characterized in that: the ultrasonic power density launched in step 3 is 5 ~ 15W/cm
2, frequency is 21KHz.
10. the electro-slag re-melting method of a kind of high speed according to claim 6, low inclusion, is characterized in that: when increasing the rotating speed of buncher (3), turn down ultrasonic power density; When turning down the rotating speed of buncher (3), increase ultrasonic power density.
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| CN106091684A (en) * | 2016-06-08 | 2016-11-09 | 天津钢研海德科技有限公司 | A kind of combined intelligent electroslag system |
| CN108251655A (en) * | 2018-04-04 | 2018-07-06 | 马鞍山华盛冶金科技发展有限公司 | A kind of smelting apparatus for improving electroslag remelting steel ingot Solidification Quality |
| CN108411120A (en) * | 2018-04-04 | 2018-08-17 | 马鞍山华盛冶金科技发展有限公司 | A method of improving electroslag remelting steel ingot Solidification Quality |
| CN111356890A (en) * | 2017-11-08 | 2020-06-30 | Sms 梅瓦克有限责任公司 | Furnace with electrode rods capable of rotating and moving simultaneously |
| CN111647756A (en) * | 2020-06-22 | 2020-09-11 | 北京钢研高纳科技股份有限公司 | False electrode for electroslag remelting furnace and self-adaptive centering method of false electrode for electroslag remelting furnace |
| CN111774550A (en) * | 2020-07-30 | 2020-10-16 | 安徽工业大学 | Electroslag feeding device for improving crystallization quality of large steel ingot |
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| CN106091684A (en) * | 2016-06-08 | 2016-11-09 | 天津钢研海德科技有限公司 | A kind of combined intelligent electroslag system |
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| CN111356890A (en) * | 2017-11-08 | 2020-06-30 | Sms 梅瓦克有限责任公司 | Furnace with electrode rods capable of rotating and moving simultaneously |
| JP2021501834A (en) * | 2017-11-08 | 2021-01-21 | エス・エム・エス メヴァック ゲー・エム・ベー・ハーＳＭＳ Ｍｅｖａｃ ＧｍｂＨ | Melting furnace with electrode rods that can rotate and move at the same time |
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| CN108251655A (en) * | 2018-04-04 | 2018-07-06 | 马鞍山华盛冶金科技发展有限公司 | A kind of smelting apparatus for improving electroslag remelting steel ingot Solidification Quality |
| CN108411120A (en) * | 2018-04-04 | 2018-08-17 | 马鞍山华盛冶金科技发展有限公司 | A method of improving electroslag remelting steel ingot Solidification Quality |
| CN111647756A (en) * | 2020-06-22 | 2020-09-11 | 北京钢研高纳科技股份有限公司 | False electrode for electroslag remelting furnace and self-adaptive centering method of false electrode for electroslag remelting furnace |
| CN111647756B (en) * | 2020-06-22 | 2021-10-15 | 北京钢研高纳科技股份有限公司 | False electrode for electroslag remelting furnace and self-adaptive centering method of false electrode for electroslag remelting furnace |
| CN111774550A (en) * | 2020-07-30 | 2020-10-16 | 安徽工业大学 | Electroslag feeding device for improving crystallization quality of large steel ingot |
| CN111774550B (en) * | 2020-07-30 | 2021-11-23 | 安徽工业大学 | Electroslag feeding device for improving crystallization quality of large steel ingot |
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Effective date of registration: 20181023 Address after: 245300 No. 73 Cao Cao Bridge, Linxi Town, Jixi, Xuancheng, Anhui Patentee after: Anhui Fukai special material Co. Ltd. Address before: 243002 Huashan Road, Huashan District, Ma'anshan, Anhui Province, No. 59 Patentee before: Anhui University of Technology |