CN109355510A - The dedicated slag system of electroslag remelting mould steel and its device used - Google Patents
The dedicated slag system of electroslag remelting mould steel and its device used Download PDFInfo
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- CN109355510A CN109355510A CN201811621754.3A CN201811621754A CN109355510A CN 109355510 A CN109355510 A CN 109355510A CN 201811621754 A CN201811621754 A CN 201811621754A CN 109355510 A CN109355510 A CN 109355510A
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- consutrode
- electroslag remelting
- slag
- mould steel
- slag system
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
- C22B9/16—Remelting metals
- C22B9/18—Electroslag remelting
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- Organic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The present invention relates to a kind of dedicated slag system of electroslag remelting mould steel and its devices used, belong to electroslag remelting technique field.The dedicated slag system of electroslag remelting mould steel of the present invention, CaF2With Al2O3Mass ratio be 65:35；Device used includes cylindrical water mold, water mold internal upper part is equipped with consutrode, consutrode lower end is inserted in slag bath, lower part is the steel ingot of coagulation forming, steel ingot upper end is metal bath, water mold bottom is equipped with bottom water case, and consutrode upper end connects lifting motor, and the depth that slag bath is inserted into consutrode lower end is 30-40mm；Consutrode and bottom water case are connected with by short net conducting wire carries electrodeless transformer, has the electrodeless transformer of load to connect PLC controller with lifting motor.It is obviously improved using the ingot quality after the dedicated slag system remelting of electroslag remelting mould steel of the present invention；Invention also provides devices used, and structure is simple, and it is convenient to operate.
Description
Technical field
The present invention relates to a kind of dedicated slag system of electroslag remelting mould steel and its devices used, belong to electroslag remelting technique neck
Domain.
Background technique
Mould steel has a large amount in variety, such as hot die steel and cold work die steel.These mold steel capital are high-carbon steel, and are closed
Gold content is both greater than 5%.After Overheating Treatment, surface hardness is high, has the characteristics that impact resistance, wear-resisting, thermal fatigue strength is high.
Mould steel can be obtained by electroslag remelting.In electroslag remelting, harmful element (sulphur, lead, antimony, bismuth, tin) in steel
It is relatively efficiently removed by steel-slag reaction and high-temperature gasification, and in esr process, the selection of slag is most important.It is molten
Slag has following important function: (1) Source: it melts metal electrode by resistance heat；(2) protective effect: it floats on gold
The surface of category protects metal bath from the pollution of atmosphere；(3) metallurgy action: due to molten metal molten drop pass through slag blanket into
Enter molten steel, adsorb the nonmetal inclusion in molten steel by slag, and carries out a large amount of metallurgical reaction in steel slag；(4) it forms
Effect: in reflow process, with the risings clinker of molten steel float on crystallizer surface formed skull, be conducive to steel ingot molding with
Preferable Ingot Surface Quality.
Electroslag remelting mould steel is a kind of medium with slag system, the field trash in metal can and chemically reacting or dissolve by
It is discharged into slag, can achieve by it to oxygen, sulphur and the necessary adjusting of other elements.If pomace is not active enough, then raw
The spindle that output is come cannot or obtain purity appropriate；If it is too active, those elements that should retain will
It is removed.Slag also plays several complementary functions.After slag is set on crystallizer wall, so that it may prevent molten metal with
Crystallizer directly contacts, and thus metal and crystallizer are spaced in terms of electrically and thermally two, and it is smooth that this also contributes to acquisition surface
Spindle.It can protect molten metal from the direct oxidation of atmosphere.It plays the work of heat storage pool at the top of molten metal
With causing shrinkage cavity and internal defect when can prevent spindle from solidifying.By its not only adjustable chemical component, institute also can control
The spindle tissue needed.In fusion process, the metal that can also have been acted improperly by adding the method for slag charge come adjusting component.Separately
Outside, with chemically and physically means, grain size and grain form can be controlled.At a temperature of melting work, in slag it is various at
Dividing will keep stable, thus substantially be carried out selecting slag according to their low-steam pressure.In addition, at the working temperature, it
Must have the ability of concise metal, and itself cannot bring extremely harmful pollutant into simultaneously.
Most domestic manufacturer is all using pseudo-ginseng slag (i.e. CaF2:Al2O3=7:3) at present.By testing and testing
Card, discovery using this proportion slag system be not it is best, the steel ingot centre after electroslag remelting be easy to produce segregation and it is loose,
Influence the quality of steel ingot.
In addition, having the slag bath of melting in water mold in esr process, slag bath is inserted into consutrode one end
In, electroslag remelting is completed by the series reaction that the fusing of consutrode end generates, electrode is inserted into the depth of slag bath to entire
Esr process has a very big impact, and also has larger impact to the quality of Electro Slag Remelting Steel, how to further increase electroslag
The quality problems urgent need to resolve of steel.
Summary of the invention
The object of the present invention is to provide a kind of dedicated slag systems of electroslag remelting mould steel, use the steel ingot after this kind of slag system remelting
Quality is obviously improved, and center segregation and rarefaction defect are controlled better, the die life produced with these steel ingots
It increases substantially；Invention also provides devices used in the dedicated slag system of electroslag remelting mould steel, and structure is simple, and operation is just
Victory is inserted into the effect of depth esr process of slag bath by coordination electrode, to improve the quality of Electro Slag Remelting Steel.
The dedicated slag system of electroslag remelting mould steel of the present invention, CaF2With Al2O3Mass ratio be 65:35.Pass through reduction
CaF2Ratio, suitably increase Al2O3Ratio, so that the resistance of slag is had certain increase, when can preferably control electroslag remelting
Burn-off rate, reach the best match of fusing and solidification, the ingot quality after electroslag remelting is obviously improved, center segregation and dredge
Loose defect is well controlled, and is also increased substantially with the die life that these steel ingots produce.
The temperature in molten bath used in the slag system is 1800-1850 DEG C.To melt the metal in esr process,
Slag must just be completely in liquid condition, and its temperature should be more than the fusing point (i.e. liquidus temperature) for being melt metal.
Device used in the dedicated slag system of electroslag remelting mould steel, including cylindrical water mold, water cooling knot
Brilliant device internal upper part is equipped with consutrode, and consutrode lower end is inserted in slag bath, and lower part is the steel ingot of coagulation forming, and steel ingot upper end is
Metal bath, water mold bottom are equipped with bottom water case, and consutrode upper end connects lifting motor, and slag is inserted into consutrode lower end
The depth in pond is 30-40mm；Consutrode and bottom water case are connected with by short net conducting wire carries electrodeless transformer, has and carries electrodeless transformation
The range of regulation of device is set between 2.5-3.5V, has the electrodeless transformer of load to connect PLC controller with lifting motor.
The device is the fluctuation range that fire door voltage is surrounded by one fire door voltage of setting and one, then actual
Fire door voltage is compared with setting voltage, if the deviation between virtual voltage and setting value is more than the fluctuation range of setting,
Electrode is automatically controlled after PLC is calculated just to ramp up to decline, otherwise electrode.By setting the fluctuation range of fire door voltage just
The control to electrode insertion depth may be implemented.
Preferably, shield ingot plate is equipped between water mold and bottom water case.
Preferably, bottom water case has insulating rubber slab.
Preferably, water mold diameter is less than 600mm, and the depth that slag bath is inserted into consutrode lower end is 40mm.
Preferably, water mold diameter is greater than 800mm, and the depth that slag bath is inserted into consutrode lower end is 30mm.
Preferably, consutrode upper end connects lifting motor by ball screw framework.
The invention has the following advantages:
(1) the dedicated slag system of electroslag remelting mould steel described in, proportion rationally, control burn-off rate when electroslag remelting, reach
To the best match of fusing and solidification, the ingot quality after electroslag remelting is obviously improved, and center segregation and rarefaction defect mitigate, folder
Sundries is reduced；
(2) when the steel ingot that the slag system remelting obtains being used for production mould, the service life of mold is obtained significantly
It improves；
(3) control to electrode insertion depth, consumable are realized by adjusting the fluctuation range of the setting of voltage and voltage
Electrode is constantly in the depth location of relatively optimization, and then largely improves the surface quality and internal matter of Electro Slag Remelting Steel
Amount, the smooth bright and clean impurity in surface is few, and smelting power consumption reduces.
Detailed description of the invention
Fig. 1 is apparatus structure schematic diagram used in the dedicated slag system of electroslag remelting mould steel of the present invention；
In figure: 1, insulating rubber slab；2, bottom water case；3, ingot plate is protected；4, steel ingot；5, water mold；6, consutrode；7,
Lifting motor；8, slag bath；9, metal bath；10, short net conducting wire；11, have and carry electrodeless transformer.
Specific embodiment
Below with reference to embodiment, the present invention is further illustrated, but it is not intended to limit implementation of the invention.
Embodiment 1
As shown in Figure 1, device used in the dedicated slag system of electroslag remelting mould steel, crystallizes including cylindrical water cooling
Device 5,5 internal upper part of water mold are equipped with consutrode 6, and 6 lower end of consutrode is inserted in slag bath 8, and lower part is coagulation forming
Steel ingot 4,4 upper end of steel ingot are metal bath 9, and 5 bottom of water mold is equipped with bottom water case 2, and 6 upper end of consutrode passes through ball wire
Thick stick mechanism connects lifting motor 7, and the depth that slag bath 8 is inserted into 6 lower end of consutrode is 30-40mm；Consutrode 6 and bottom water case 2
Be connected with by short net conducting wire 10 and carry electrodeless transformer 11, have the range of regulation for carrying electrodeless transformer 11 be set in 2.5-3.5V it
Between, have and carries electrodeless transformer 11 and the connection PLC controller of lifting motor 7.
Shield ingot plate 3 is equipped between the water mold 5 and bottom water case 2.
The bottom water case 2 has insulating rubber slab 1.
When 5 diameter of water mold is less than 600mm, the depth of 6 lower end of consutrode insertion slag bath 8 is set as 40mm；When
5 diameter of water mold is greater than 800mm, and the depth of 6 lower end of consutrode insertion slag bath 8 is set as 30mm.
Clinker (the CaF of melting is filled in copper water mold 52With Al2O3Mass ratio be 65:35, the temperature in molten bath
Degree is 1800 DEG C), 6 one end of consutrode is inserted into slag, and consutrode 6, slag bath 8, metal bath 9, steel ingot 4, bottom water case 2 are logical
Too short net conducting wire 10 and has and carry electrodeless transformer 11 and be formed into a loop.During the energization, slag bath 8 releases Joule heat, will be from power consumption
6 end of pole is gradually melted, and molten metal pools drop, passes through slag bath 8, falls into crystallizer, metal bath 9 is formed, by water cooling
Effect, is quickly solidified to form steel ingot 4.It passes through slag bath in electrode tip droplet formation stage, and drop and drips stage, steel-slag
Part contact is filled, nonmetallic inclusionsin steel is absorbed by clinker, and harmful element (sulphur, lead, antimony, bismuth, tin) is anti-by steel-slag in steel
It should relatively efficiently be removed with high-temperature gasification.Liquid metal is substantially avoided and is reoxidized under slag bath covering.
Claims (8)
1. a kind of dedicated slag system of electroslag remelting mould steel, it is characterised in that: CaF2With Al2O3Mass ratio be 65:35.
2. the dedicated slag system of electroslag remelting mould steel according to claim 1, it is characterised in that: the temperature in molten bath used in slag system
It is 1800-1850 DEG C.
3. device used in a kind of dedicated slag system of electroslag remelting mould steel of any of claims 1 or 2, including cylindrical water cooling
Crystallizer (5), water mold (5) internal upper part are equipped with consutrode (6), and consutrode (6) lower end is inserted in slag bath (8), under
Portion is the steel ingot (4) of coagulation forming, and steel ingot (4) upper end is metal bath (9), and water mold (5) bottom is equipped with bottom water case
(2), it is characterised in that: consutrode (6) upper end connects lifting motor (7), and the depth of slag bath (8) is inserted into consutrode (6) lower end
Degree is 30-40mm；Consutrode (6) and bottom water case (2) are connected with by short net conducting wire (10) carries electrodeless transformer (11), there is load
The range of regulation of electrodeless transformer (11) is set between 2.5-3.5V, is had and is carried electrodeless transformer (11) and lifting motor (7) even
Connect PLC controller.
4. device used in the dedicated slag system of electroslag remelting mould steel according to claim 3, it is characterised in that: the water
Shield ingot plate (3) is equipped between cooling crystallizer (5) and bottom water case (2).
5. device used in the dedicated slag system of electroslag remelting mould steel according to claim 3, it is characterised in that: the bottom
Water tank (2) has insulating rubber slab (1).
6. device used in the dedicated slag system of electroslag remelting mould steel according to claim 3, it is characterised in that: the water
Cooling crystallizer (5) diameter is less than 600mm, and the depth that slag bath (8) are inserted into consutrode (6) lower end is 40mm.
7. device used in the dedicated slag system of electroslag remelting mould steel according to claim 3, it is characterised in that: the water
Cooling crystallizer (5) diameter is greater than 800mm, and the depth that slag bath (8) are inserted into consutrode (6) lower end is 30mm.
8. device used in the dedicated slag system of electroslag remelting mould steel according to claim 3, it is characterised in that: it is described from
Power pole (6) upper end connects lifting motor (7) by ball screw framework.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811621754.3A CN109355510A (en) | 2018-12-28 | 2018-12-28 | The dedicated slag system of electroslag remelting mould steel and its device used |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811621754.3A CN109355510A (en) | 2018-12-28 | 2018-12-28 | The dedicated slag system of electroslag remelting mould steel and its device used |
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| CN201811621754.3A Pending CN109355510A (en) | 2018-12-28 | 2018-12-28 | The dedicated slag system of electroslag remelting mould steel and its device used |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114561551A (en) * | 2022-03-09 | 2022-05-31 | 苏州金立鑫特材科技有限公司 | Electroslag remelting slag pool for gradually regulating and controlling molten steel |
| CN114918385A (en) * | 2022-04-28 | 2022-08-19 | 山东邦巨实业有限公司 | Device and process for controlling nitrogen content in die steel |
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| CN103602823A (en) * | 2013-12-05 | 2014-02-26 | 彭龙生 | Electro-slag remelting method of self-consumable electrode and electro-slag furnace |
| CN104174834A (en) * | 2014-08-08 | 2014-12-03 | 沈阳铸造研究所 | Electroslag casting production method for waterwheel blade green compact |
| CN105238935A (en) * | 2015-10-15 | 2016-01-13 | 中钢集团邢台机械轧辊有限公司 | Slag system used for electroslag remelting |
| US20160045952A1 (en) * | 2014-08-13 | 2016-02-18 | Northeastern University | Method for manufacturing hollow ingot for retaining ring of large generator by electroslag remelting |
| CN209227035U (en) * | 2018-12-28 | 2019-08-09 | 淄博秦鼎昌特钢科技有限公司 | Voltage controls electroslag remelting device |
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2018
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103602823A (en) * | 2013-12-05 | 2014-02-26 | 彭龙生 | Electro-slag remelting method of self-consumable electrode and electro-slag furnace |
| CN104174834A (en) * | 2014-08-08 | 2014-12-03 | 沈阳铸造研究所 | Electroslag casting production method for waterwheel blade green compact |
| US20160045952A1 (en) * | 2014-08-13 | 2016-02-18 | Northeastern University | Method for manufacturing hollow ingot for retaining ring of large generator by electroslag remelting |
| CN105238935A (en) * | 2015-10-15 | 2016-01-13 | 中钢集团邢台机械轧辊有限公司 | Slag system used for electroslag remelting |
| CN209227035U (en) * | 2018-12-28 | 2019-08-09 | 淄博秦鼎昌特钢科技有限公司 | Voltage controls electroslag remelting device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114561551A (en) * | 2022-03-09 | 2022-05-31 | 苏州金立鑫特材科技有限公司 | Electroslag remelting slag pool for gradually regulating and controlling molten steel |
| CN114918385A (en) * | 2022-04-28 | 2022-08-19 | 山东邦巨实业有限公司 | Device and process for controlling nitrogen content in die steel |
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