CN101480715A - Electroslag smelting casting device with additional electromagnetic stirring and method - Google Patents
Electroslag smelting casting device with additional electromagnetic stirring and method Download PDFInfo
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- CN101480715A CN101480715A CNA2009100102413A CN200910010241A CN101480715A CN 101480715 A CN101480715 A CN 101480715A CN A2009100102413 A CNA2009100102413 A CN A2009100102413A CN 200910010241 A CN200910010241 A CN 200910010241A CN 101480715 A CN101480715 A CN 101480715A
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Abstract
The invention relates to an electroslag casting device additionally provided with electromagnetic stirring and a method thereof. The electroslag casting device belongs to the technical field of special steel electroslag metallurgy and comprises a crystallizer, a crystallizer water jacket and an electromagnetic stirrer; an annular magnet is sleeved on the outer wall of the crystallizer and positioned at the middle-upper part of the crystallizer, a loop is wound on an iron core of the annular magnet, an electromagnetic stirrer water jacket is arranged at the periphery of the annular electromagnet, and the electromagnetic stirrer water jacket is communicated with the crystallizer water jacket; a melting consumable electrode forms molten steel drops which then enter a slag layer; the molten steel drops fall down in a spiral line way in the slag layer under the action of the rotary electromagnetic field and then enter a steel ingot liquid tank; the steel ingot liquid tank raises continuously and also enters into an effective magnetic field action region of the electromagnetic stirrer; and meanwhile, electric current in the molten steel is acted with the rotary magnetic field to produce the electromagnetic force which then drives the molten steel to rotate. The invention has simple equipment, and has the obvious functions of improving the surface quality, the subsurface quality and the solidifying tissue of a casting blank and the isometric crystal ratio, and lightening the internal defects, such as the center segregation, the center looseness, and the like.
Description
Technical field
The invention belongs to special steel electroslag metallurgy technical field, particularly a kind of electroslag molten casting device and method that adds electromagnetic agitation that have.
Background technology
The unique raising metal of electroslag smelting casting cleanliness factor, control solidified structure and final molding reach the blank refinement triple functions.Yet, when electroslag remelting high alloy steel ingot, still exist ingot crystal and organize thick, gross segregation and shrinkage cavity and shrinkage porosite problem.These problems are more serious in particularly medium-and-large-sized forging or the foundry goods.Therefore improve the electroslag remelting steel ingot quality, obtaining uniform formation's structure special steel has important practical significance for development China industrial economy, " special steel " 2008 the 1st interim electromagnetic agitation are to the influence in electroslag remelting steel ingot temperature field, set forth the Mathematical Modeling that adds electroslag remelting steel ingot process of setting under the electromagnetism stirring condition outside, magnetic stirrer in this device places the crystallizer middle part, strengthened the molten steel internal heat transfer like this, the molten bath also flattens smooth, help eliminating defectives such as ESR ingot gross segregation and shrinkage cavity, also help nucleus simultaneously and develop into equiaxed grain structure.But crystallizer and magnetic stirrer are independent separately, have reduced the penetration capacity in magnetic field, have influenced electromagnet and have played a role.
Summary of the invention
In order to solve the deficiencies in the prior art, the invention provides a kind of electroslag molten casting device that adds electromagnetic agitation that has.
Technical scheme of the present invention is achieved in that a kind of electroslag molten casting device that adds electromagnetic agitation that has, comprise crystallizer and the magnetic stirrer of being with water jacket, the crystallizer outer wall is with an annular magnet, annular magnet is positioned at the middle and upper part of crystallizer, is provided with the magnetic stirrer water jacket that is communicated with crystallizer water jacket around ring electromagnet.
Has only one deck copper coin between the outer wall of described crystallizer and the magnetic stirrer water jacket.
A kind of application has the method that the electroslag molten casting device that adds electromagnetic agitation carries out electroslag smelting casting, carries out according to the following steps:
(1) cooling water is fed in the crystallizer, Tong Dian electromagnetic stirrer coil and electromagnet are not immersed in the cooling water simultaneously yet, putting into thickness in the slag bath of crystallizer is 120 millimeters to 200 millimeters electrode slag charges, traveling electrode immerses in the slag 20 millimeters to 50 mm depths by magnetic stirrer, electrifying electrodes, the beginning esr process.
(2) the steel ingot height rises to three of crystallizer height/for the moment in crystallizer, with the magnetic stirrer coil electricity, increase gradually by zero, when the electrode melting end rose to the lower surface of magnetic stirrer, coil current also reached the operate as normal value and is about 300 amperes to 500 amperes.
What (3) at first rise to electromagnetic agitation magnetic field service area is electrode melting end and slag blanket, the consutrode of fusing forms molten steel and drips, and enter slag blanket, add outside under the rotation electromagnetic field effect, molten steel drops in and presents the helix mode in the slag blanket and fall, enter in the steel ingot liquid pool, the continuous rising of steel ingot liquid pool also enters the effective magnetic field active region of magnetic stirrer, and electric current and rotating excitation field effect produce electromagnetic force and drive the molten steel rotation in the molten steel at this moment.
(4) said process lasts till that comsumable melt finishes, closes the electroslag remelting power supply, treats to close the electromagnetic stirrer coil power supply after steel ingot solidifies fully, and then, steel ingot is closed cooling water after cooling off fully, goes out ingot again.
The described unloaded magnetic induction intensity in action center place that adds electromagnet is in 350-2000 Gauss's scopes, and frequency is in 1-20 hertz scope.
The invention has the beneficial effects as follows: the yoke in generation magnetic field and coil and crystallizer combine, the cooling water that feeds in the crystallizer both had been used for ingot solidification, also be used to produce the coil cooling in magnetic field, simplified apparatus system architecture not only, and electromagnet can also be produced magnetic field and arrive the active region and pass the copper coin number of plies and reduce to one deck from three layers, can reduce greatly because the magnetic energy loss that the magnetic field kelvin effect causes, electromagnetic agitating technology is improving the surface and the subcutaneous quality of strand, improve the casting blank solidification tissue, improve equiaxial crystal ratio, alleviate internal flaw aspects such as center segregation and center porosity significant action effect is all arranged, and has a directly contacting metal melt, pollution-free to metal bath, obviously reduce advantages such as molten metal oxidization, propose to adopt and horizontally rotate magnetic field, make the electromagnetic force that produces perpendicular to the crystallizer meridian plane, coil is wrapped on the iron core, make that the output density of line of magnetic force is big, electromagnetic stirring force is strong, by optimizing operating parameter, be expected to obtain to improve refining efficiency, improve the magnetic field condition of special steel ingot institutional framework.
Description of drawings
Fig. 1 is a kind of electroslag molten casting device schematic diagram that adds electromagnetic agitation that has;
Fig. 2 is magnetic stirrer internal magnet and coil structure figure;
Among the figure: 1 consutrode, 2 electromagnet and coil, 3 slag baths, 4 molten drops, 5 metal baths, 6 two-phase sections, 7 ingot castings, 8 end water tanks, 9 power supplys, 10 crystallizer water jackets, 11 magnetic stirrer water jackets.
The specific embodiment
As shown in Figure 1, a kind of electroslag molten casting device that adds electromagnetic agitation that has, comprise power supply 9, consutrode 1, crystallizer and agitator, crystallizer comprises slag bath 3 and metal bath 5, crystallizer and magnetic stirrer are integrated, the cooling water that feeds in the crystallizer both had been used for ingot solidification, also be used to produce the coil cooling in magnetic field, simplified apparatus system architecture not only, and electromagnet can also be produced magnetic field and arrive the active region and pass the copper coin number of plies and reduce to one deck from three layers, can reduce greatly because the magnetic energy loss that the magnetic field kelvin effect causes, the crystallizer outer wall is with an annular magnet, annular magnet is positioned at 1/2 above position of crystallizer, is wound with coil on the iron core of annular magnet.
Cooling water is fed in the crystallizer from the cooling water inlet, Tong Dian electromagnet and coil 2 are not immersed in the cooling water simultaneously yet, in the slag bath 3 of crystallizer, put into thickness and be 180 millimeters electrode slag charge, mobile consutrode 1 immerses 30 mm depths in the slag, consutrode 1 energising, the beginning esr process, the steel ingot height rises to three of crystallizer height/for the moment in crystallizer, with the magnetic stirrer coil electricity, increase gradually by zero, when consutrode 1 melting end rises to the lower surface of magnetic stirrer, coil current also reaches the operate as normal value and is about 400 amperes, the consutrode 1 of fusing forms molten steel and drips, and enter slag blanket 3, add outside under the rotation electromagnetic field effect, molten steel drips and presents the helix mode and fall, enter in the steel ingot liquid pool, also enter the effective magnetic field active region of magnetic stirrer along with the rising of steel ingot liquid pool, the unloaded magnetic induction intensity in action center place that adds electromagnet is 380 Gausses, frequency is 15 hertz, electric current and rotating excitation field effect produce electromagnetic force and drive the molten steel rotation in the molten steel at this moment, the electromagnetic force driven vertical is in the evenly temperature of solidification front that flows of column crystal in this process, promote the field trash and the motion of air bubbles of solidification front, break simultaneously or the bending columnar dendrite, and richness amassed be distributed in the melt again in the alloying element solute of solidification front, broken dendrite fragment becomes the new nuclei of crystallization after entering melt, to cause the increase of equiax crystal quantity, this process lasts till that comsumable melt finishes, close the electroslag remelting power supply, treat to close the electromagnetic stirrer coil power supply after steel ingot solidifies fully, after steel ingot cools off fully, close cooling water, go out ingot again.
The principle that electromagnetic agitating technology improves the electroslag remelting refining efficiency is that the molten drop of comsumable melt is under the rotating excitation field effect, in non-conductive slag blanket, fall in the helix mode, with respect to the refining process that does not apply magnetic field, directly falls, the motion distance increases, increase with the relative velocity of slag blanket, remove abilities such as impurity, deep desulfuration thereby strengthened molten drop, can reach the effect that improves refining efficiency.
Quality problems at actual steel ingot all are position, middle and upper part or the two kinds of different solids junctions that appear at steel ingot, the present invention proposes applying rotating magnetic field and puts on above position, electroslag smelting casting crystallizer middle part or two kinds of different solids junctions, according to result of study proposition add function composite by electromagnetic stirring in diameter greater than the round ingot more than 350 millimeters and have the binding site of two kinds of different solids.
Adopt the electroslag molten casting device that adds the electromagnetism stirring in the crystallizer middle and upper part of the present invention to produce two batches of founding parts, material, section configuration and the size of two batches of founding part employings see Table 1, after the founding, after the founding two batches of founding parts are waited crystallographic axis rate and longitudinal profile inspection, it the results are shown in Table 2, and its inspection is undertaken by relative national standards.
The used material of table 1 embodiment founding part, section configuration and size
| Lot number | Material | Section configuration and |
| 1 | H13 mould steel | Cylindrical blank Φ 400mm, high 1600mm |
| 2 | H13 mould steel | Cylindrical blank Φ 450mm, the junction of high 700mm and square billet 300mm * 300mm |
Table 2 embodiment founding part product waits crystallographic axis rate and longitudinal profile check result
| Lot number | Deng the crystallographic axis rate | Longitudinal profile is checked |
| 1 | More than 40% | Be tiny columanar structure and evenly do not have the shrinkage cavity shrinkage porosity phenomenon |
| 2 | More than 40% | Be tiny columanar structure and evenly do not have the shrinkage cavity shrinkage porosity phenomenon |
Claims (4)
1, a kind of electroslag molten casting device that adds electromagnetic agitation that has, comprise crystallizer and the magnetic stirrer of being with water jacket, the crystallizer outer wall is with an annular magnet, it is characterized in that annular magnet is positioned at the middle and upper part of crystallizer, around ring electromagnet, be provided with the magnetic stirrer water jacket that is communicated with crystallizer water jacket.
2, a kind of electroslag molten casting device that adds electromagnetic agitation that has according to claim 1 is characterized in that having only one deck between the outer wall of described crystallizer and the magnetic stirrer water jacket.
3, a kind of application rights requires 1 describedly to have a method that the electroslag molten casting device that adds electromagnetic agitation carries out electroslag smelting casting, it is characterized in that carrying out according to the following steps:
(1) cooling water is fed in the crystallizer, put into thickness and be 120 millimeters to 200 millimeters electrode slag charge in the slag bath of crystallizer, consutrode immerses in the slag 20 millimeters to 50 millimeters the degree of depth, electrifying electrodes, beginning electroslag remelting by magnetic stirrer;
(2) the steel ingot height rises to that three of crystallizer height/for the moment, with the magnetic stirrer coil electricity, when the electrode melting end rose to the lower surface of magnetic stirrer, it was 300 amperes to 500 amperes that coil current reaches the operate as normal value in crystallizer;
(3) consutrode of fusing formation molten steel drips, and enters slag blanket and steel ingot liquid pool, and the steel ingot liquid pool enters the effective magnetic field active region of magnetic stirrer, and electric current and rotating excitation field effect produce electromagnetic force and drive the molten steel rotation in the molten steel;
(4) finish, close the electroslag remelting power supply when comsumable melt, treat to close the electromagnetic stirrer coil power supply after steel ingot solidifies fully, after the steel ingot cooling, close cooling water, go out ingot.
4, application according to claim 2 has the method that the electroslag molten casting device that adds electromagnetic agitation carries out electroslag smelting casting, it is characterized in that the described unloaded magnetic induction intensity of electromagnet that adds in 350-2000 Gauss's scopes, and frequency is in 1-20 hertz scope.
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2009100102413A CN101480715A (en) | 2009-01-21 | 2009-01-21 | Electroslag smelting casting device with additional electromagnetic stirring and method |
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| CNA2009100102413A CN101480715A (en) | 2009-01-21 | 2009-01-21 | Electroslag smelting casting device with additional electromagnetic stirring and method |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102189246A (en) * | 2010-03-02 | 2011-09-21 | 英特科特殊熔炼技术有限责任公司 | Method and device for manufacturing hollow melt ingots |
| CN102416463A (en) * | 2011-12-08 | 2012-04-18 | 沈阳市盛华特种铸造有限公司 | Electroslag fusion casting manufacturing method for annular plate of hydraulic generator |
| CN103056344A (en) * | 2013-01-18 | 2013-04-24 | 上海大学 | Method for controlling electroslag melting casting by added transient magnetic field and electroslag smelting casting device |
| CN103406520A (en) * | 2013-08-27 | 2013-11-27 | 东北大学 | Consumable stirrer added device and method for producing large homogeneous electro-slag re-melting steel ingots |
| CN105939799A (en) * | 2014-01-24 | 2016-09-14 | 高桥谦三 | Permanent magnet-type molten metal stirring device and melting furnace and continuous casting device comprising same |
| CN109047685A (en) * | 2018-09-07 | 2018-12-21 | 乌克兰国家科学院E.O.巴顿电焊接研究所 | A method of preparing steel ingot |
| CN109338146A (en) * | 2018-12-18 | 2019-02-15 | 华中科技大学 | A kind of solenoid type magnetic stirrer with control ring |
| CN109943730A (en) * | 2019-04-30 | 2019-06-28 | 江苏省福达特种钢有限公司 | A kind of multi-state magnetic control ESR system |
| CN109954853A (en) * | 2017-12-14 | 2019-07-02 | 鞍钢股份有限公司 | A kind of efficient electroslag wash heat device and wash heat method |
| CN110499426A (en) * | 2019-08-16 | 2019-11-26 | 河钢股份有限公司 | A kind of device and method of the high-end bearing steel of Electromagnetic Control electroslag refining |
| CN113249585A (en) * | 2021-05-13 | 2021-08-13 | 东北大学 | Constant molten pool shape electroslag remelting method based on electrode rotation speed control |
| CN115505746A (en) * | 2022-08-29 | 2022-12-23 | 重庆大学 | Smelting method of electroslag remelting ultra-clean steel |
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2009
- 2009-01-21 CN CNA2009100102413A patent/CN101480715A/en active Pending
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102189246A (en) * | 2010-03-02 | 2011-09-21 | 英特科特殊熔炼技术有限责任公司 | Method and device for manufacturing hollow melt ingots |
| CN102416463A (en) * | 2011-12-08 | 2012-04-18 | 沈阳市盛华特种铸造有限公司 | Electroslag fusion casting manufacturing method for annular plate of hydraulic generator |
| CN102416463B (en) * | 2011-12-08 | 2014-04-16 | 沈阳市盛华特种铸造有限公司 | Electroslag fusion casting manufacturing method for annular plate of hydraulic generator |
| CN103056344A (en) * | 2013-01-18 | 2013-04-24 | 上海大学 | Method for controlling electroslag melting casting by added transient magnetic field and electroslag smelting casting device |
| CN103056344B (en) * | 2013-01-18 | 2015-05-06 | 上海大学 | Method for controlling electroslag melting casting by added transient magnetic field and electroslag smelting casting device |
| CN103406520A (en) * | 2013-08-27 | 2013-11-27 | 东北大学 | Consumable stirrer added device and method for producing large homogeneous electro-slag re-melting steel ingots |
| CN105939799A (en) * | 2014-01-24 | 2016-09-14 | 高桥谦三 | Permanent magnet-type molten metal stirring device and melting furnace and continuous casting device comprising same |
| US9958209B2 (en) | 2014-01-24 | 2018-05-01 | Kenzo Takahashi | Permanent magnet-type molten metal stirring device and melting furnace and continuous casting apparatus including the same |
| CN109954853A (en) * | 2017-12-14 | 2019-07-02 | 鞍钢股份有限公司 | A kind of efficient electroslag wash heat device and wash heat method |
| CN109047685A (en) * | 2018-09-07 | 2018-12-21 | 乌克兰国家科学院E.O.巴顿电焊接研究所 | A method of preparing steel ingot |
| CN109338146A (en) * | 2018-12-18 | 2019-02-15 | 华中科技大学 | A kind of solenoid type magnetic stirrer with control ring |
| CN109338146B (en) * | 2018-12-18 | 2023-11-17 | 华中科技大学 | Solenoid electromagnetic stirrer with control ring |
| CN109943730A (en) * | 2019-04-30 | 2019-06-28 | 江苏省福达特种钢有限公司 | A kind of multi-state magnetic control ESR system |
| CN110499426A (en) * | 2019-08-16 | 2019-11-26 | 河钢股份有限公司 | A kind of device and method of the high-end bearing steel of Electromagnetic Control electroslag refining |
| CN113249585A (en) * | 2021-05-13 | 2021-08-13 | 东北大学 | Constant molten pool shape electroslag remelting method based on electrode rotation speed control |
| CN113249585B (en) * | 2021-05-13 | 2022-02-01 | 东北大学 | Constant molten pool shape electroslag remelting method based on electrode rotation speed control |
| CN115505746A (en) * | 2022-08-29 | 2022-12-23 | 重庆大学 | Smelting method of electroslag remelting ultra-clean steel |
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Open date: 20090715 |