CN108411120A - A method of improving electroslag remelting steel ingot Solidification Quality - Google Patents
A method of improving electroslag remelting steel ingot Solidification Quality Download PDFInfo
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- C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
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Abstract
The invention discloses a kind of method improving electroslag remelting steel ingot Solidification Quality, electroslag remelting technique fields.A kind of method of improvement electroslag remelting steel ingot Solidification Quality of the present invention, when being smelted using smelting apparatus, the consumable metal of metal electrode is inserted into the liquid slag of melting crystallizer, the anode of the pulse power is connected with metal electrode, the cathode of the pulse power is connected with bottom water case, the pulse power is powered to forming electrical circuit, and the consumable metal remelting of metal electrode obtains steel ingot after solidifying again.When the present invention is smelted using smelting apparatus, the pulse current of the pulse power is introduced into fusion process by metal electrode, and the pulse power is powered to forming electrical circuit, and the consumable metal remelting of metal electrode obtains steel ingot after solidifying again.
Description
Technical field
The invention belongs to electroslag remelting technique fields, solidify matter more specifically to a kind of improvement electroslag remelting steel ingot
The method of amount.
Background technology
Electroslag remelting refines as a kind of extraordinary metallurgical method, collection and freezes solidly on one, the material after electroslag remelting
Have many advantages, such as that degree of purity is high, solidified structure is fine and close, thus this method is play an important role in terms of producing high quality material.
However electro-slag re-melting method, there is also some problems, such as (1) metal bath (shape) depth is not easy to control.Keep electroslag remelting mistake
In journey metal bath in it is shallow it is flat-shaped be obtain well-crystallized quality guarantee.However as the progress of reflow process, if cannot
Control smelting parameter, metal bath can gradually be deepened well, be generated so as to cause partially solidified defect；(2) crystalline structure
Refinement.Although the column crystal in ESR ingot be not to be regarded as be ESR ingot defect, if it is possible to refine column crystal, even
Change column crystal is equiax crystal, then the quality for improving ESR ingot (especially some high-alloy steel, such as high-speed tool steel)
Have very great help.
In order to realize the above target, metallargist has carried out a large amount of basic research and technology development work, and obtains
Some achievements.Regrettably, there are some disadvantages in these achievements.Therefore, in current electroslag remelting field, invention is a kind of
Method improves the solidified structure of electroslag ingot, has great importance for the development of electroslag technology.
Through retrieval, has relevant technology and disclose.Such as：A kind of electroslag remelting process (application number of GH901 alloys：
CN201410403472.1, the applying date：2014-08-18), electroslag remelting using it is preceding slag charge is heated in batch-type furnace to 500~
1000 DEG C are toasted, after the completion of baking, by 0.4~0.6% addition Titanium of used slag charge total weight；Electroslag remelting,
Coordination electrode ingot burn-off rate is 0.013Dkg/min, speed undulated control is melted within ± 0.5kg/min, in electroslag remelting striking
After phase, the pure titanium particle of metal is added by the amount of (0.078D~0.195D) g/15min in smelting period；With electroslag remelting
It carries out every 15min, the addition of the pure titanium particle of metal is successively decreased 10~20g；Sample detection controls the alloy in electroslag remelting mistake
Scaling loss amount in journey further decreases the alloy ESR ingot arc end and receives the difference of arc end Ti contents, it is uniform to obtain Ti contents
GH901 alloy ESR ingots, but the technology smelt ESR ingot Solidification Quality it is relatively poor, need to be further increased.
Invention content
1. technical problems to be solved by the inivention
It is an object of the invention to overcome in the prior art, the relatively poor problem of electroslag remelting steel ingot Solidification Quality carries
For a kind of method improving electroslag remelting steel ingot Solidification Quality, the pulse current of the pulse power is introduced into melting by metal electrode
Cheng Zhong, the pulse power are powered to forming electrical circuit, and the consumable metal remelting of metal electrode obtains steel ingot after solidifying again, in high frequency arteries and veins
Under punching effect, metal bath generates faint disturbance, can promote the uniform of temperature field of molten pool, and promotes the life of equiax crystal
It is long, ingot solidification quality can be improved.
2. technical solution
A kind of method of improvement electroslag remelting steel ingot Solidification Quality of the present invention, when being smelted using smelting apparatus, gold
Belong to electrode the pulse current of the pulse power is introduced into fusion process, the pulse power is powered to forming electrical circuit, metal electrode
Consumable metal remelting obtains steel ingot after solidifying again.
Preferably, when being smelted using smelting apparatus, the consumable metal of metal electrode is inserted into the liquid of melting crystallizer
In state slag, the anode of the pulse power is connected with metal electrode, and the cathode of the pulse power is connected with bottom water case, pulse power energization shape
At electrical circuit, the consumable metal remelting of metal electrode obtains steel ingot after solidifying again.
Preferably, when being smelted using smelting apparatus, the consumable metal of metal electrode is inserted into the liquid of melting crystallizer
In state slag, metal electrode includes first electrode and second electrode, first electrode and second electrode respectively with pulse power positive and negative anodes
It is connected, the pulse power is powered to forming electrical circuit, and the consumable metal remelting of metal electrode obtains steel ingot after solidifying again.
Preferably, the pulse power is DC current, and the frequency of the DC current is 10-30KHz.
Preferably, smelting apparatus includes the pulse power, melting crystallizer, metal electrode and bottom water case, and the bottom water case is set
It is placed in the bottom of melting crystallizer, is used to accommodate metal bath and electroslag layer in melting crystallizer；The metal electrode is inserted
Enter inside melting crystallizer, the consumable metal of metal electrode bottom is inserted into electroslag layer, the anode and metal electrode of the pulse power
It is connected, the cathode of the pulse power is connected with bottom water case.
Preferably, the pulse power, melting crystallizer, metal electrode and bottom water case, the bottom water case are set to melting crystallization
The bottom of device, melting crystallizer are interior for accommodating metal bath and electroslag layer；The insertion melting crystallizer of the metal electrode
The consumable metal of inside, metal electrode bottom is inserted into electroslag layer, and metal electrode includes first electrode and second electrode, the first electricity
Pole and second electrode are connected with pulse power positive and negative anodes respectively.
Preferably, graphite electrode is used to carry out slugging first before metal electrode remelting.
Preferably, pulse power output current=* D tie A, and wherein D becomes crystallizer diameter/cm.
Preferably, pulse power output voltage=0.5*D knot+V, wherein D becomes crystallizer diameter/cm.
Preferably, further include supporting mechanism, which includes vertical rack and horizontal stand, one end of horizontal stand
It is slidably mounted on vertical rack, metal electrode is installed on the one end of horizontal stand far from vertical rack.
3. advantageous effect
Using technical solution provided by the invention, compared with existing known technology, there is following remarkable result：
(1) a kind of method of improvement electroslag remelting steel ingot Solidification Quality of the invention, bottom water case are set to melting crystallizer
Bottom, for accommodating metal bath and electroslag layer in melting crystallizer；Inside the insertion melting crystallizer of metal electrode, gold
The consumable metal for belonging to electrode base is inserted into electroslag layer, and the anode of the pulse power is connected with metal electrode, the cathode of the pulse power
It is connected with bottom water case, the pulse power applies into metal bath under pulse current effect, and generates faint disturb in metal bath
It is dynamic, the uniform of metal bath temperature field can be promoted, to realize the feature similar to directional solidification growth, improve ingot solidification
Quality；
(2) method of a kind of improvement electroslag remelting steel ingot Solidification Quality of the invention, the pulse current that the pulse power generates
The lower molten bath flowing generated of effect can make the column crystal produced broken, more forming core cores be generated, to promote column
The conversion of shape crystal orientation equiax crystal, improves the equiaxial crystal ratio of solidified structure.
Description of the drawings
Fig. 1 is a kind of structural schematic diagram for the smelting apparatus improving electroslag remelting steel ingot Solidification Quality of the present invention；
Fig. 2 is the structural schematic diagram of embodiment 2；
Fig. 3 is the structural schematic diagram of embodiment 3；
Fig. 4 is the structural schematic diagram of embodiment 4；
Fig. 5 is that the external setting based on hollow roll as the composite roll smelting apparatus of outer layer metal of embodiment 4 is shaken
Dynamic component；
Fig. 6 is the structural schematic diagram of embodiment 5；
Fig. 7 is a kind of flow chart for the method improving electroslag remelting steel ingot Solidification Quality of the present invention.
Label declaration in schematic diagram：
110, transformer；111, the pulse power；120, supporting mechanism；121, vertical rack；122, horizontal stand；130, golden
Belong to electrode；131, first electrode；132, second electrode；133, consumable metal；140, electrode holder part；
210, melting crystallizer；211, hollow roll；
221, steel ingot is solidified；222, metal bath；223, electroslag layer；230, crystallizer axial line；
310, bottom water case；320, turntable；330, cooling-part；331, cooling spray；340, vibration component.
Specific implementation mode
To further appreciate that present disclosure, the present invention is described in detail in conjunction with the accompanying drawings and embodiments.
Structure, ratio, size depicted in this specification attached drawing etc., only to coordinate the revealed content of specification,
So that those skilled in the art understands and reads, the enforceable qualifications of the present invention are not limited to, therefore do not have technology
On essential meaning, the modification of any structure, the change of proportionate relationship or the adjustment of size can be generated not influencing the present invention
The effect of and the purpose that can reach under, should all still fall in the range of disclosed technology contents obtain and can cover.Together
When, cited such as "upper", "lower", "left", "right", " centre " term in this specification are merely convenient to the clear of narration,
Rather than to limit enforceable range, relativeness is altered or modified, in the case where changing technology contents without essence, when also regarding
For the enforceable scope of the present invention.
Embodiment 1
As shown in fig. 7, a kind of method of improvement electroslag remelting steel ingot Solidification Quality of the present embodiment, metal electrode 130 will
The pulse current of the pulse power 111 is introduced into fusion process, and the energization of the pulse power 111 forms electrical circuit, metal electrode 130
133 remelting of consumable metal obtains steel ingot after solidifying again.Detailed description is：
Step 1: when being smelted using smelting apparatus, graphite electrode is used before 130 remelting of metal electrode first
Slag；
Step 1: the consumable metal 133 of metal electrode 130 to be inserted into the liquid slag of melting crystallizer 210 after the completion of slugging
In, the anode of the pulse power 111 is connected with metal electrode 130, and the cathode of the pulse power 111 is connected with bottom water case 310, pulse electricity
Source 111 is powered and forms electrical circuit, and 133 remelting of consumable metal of metal electrode 130 obtains steel ingot after solidifying again.Wherein pulse electricity
Source 111 is high-frequency direct-current electric current, and the frequency of the DC current is 10-30KHz.111 output current=180 of the pulse power~200*
DKnotA, wherein DKnotFor crystallizer diameter/cm.111 output voltages of the pulse power=0.5*DKnot+ 27~37V, wherein DKnotFor crystallizer
Diameter/cm.
As shown in Figure 1, a kind of smelting apparatus of improvement electroslag remelting steel ingot Solidification Quality of the present embodiment, including pulse electricity
Source 111, melting crystallizer 210, metal electrode 130 and bottom water case 310, the bottom water case 310 are set to melting crystallizer 210
Bottom, bottom water case 310 plays the role of support, cooling to melting crystallizer 210, and bottom water case 310 and melting crystallizer 210 are common
The reaction molten bath of composite roll electroslag smelting is surrounded, the bottom in molten bath cools down under 310 cooling effect of bottom water case, solidifies to be formed and coagulate
Gu steel ingot 221,221 top of solidification steel ingot is followed successively by metal bath 222 and electroslag layer 223.For accommodating in melting crystallizer 210
There are metal bath 222 and electroslag layer 223；Inside the insertion melting crystallizer 210 of the metal electrode 130,130 bottom of metal electrode
The consumable metal 133 in portion is inserted into electroslag layer 223, and the anode of the pulse power 111 is connected with metal electrode 130, the pulse power 111
Cathode be connected with bottom water case 310.Wherein melting crystallizer 210 carries out water-spraying control.The pulse power 111 and 110 phase of transformer
Even, the pulse power 111 converts the alternating current that transformer 110 exports to pulse direct current.
The present embodiment further includes supporting mechanism 120, which includes vertical rack 121 and horizontal stand 122,
One end of horizontal stand 122 is slidably mounted on vertical rack 121, and horizontal stand 122 can be along the height side of vertical rack 121
To being slided, to adjust the height of horizontal stand 122.Metal electrode 130 is installed on horizontal stand 122 far from vertical rack
121 one end, detailed description are：Electrode holder part 140 is provided on horizontal stand 122, the electrode holder part 140 sliding
It is installed on horizontal stand 122, metal electrode 130 is installed on by electrode holder part 140 on horizontal stand 122, sliding electrode
Hold assembly 140 can adjust position of the metal electrode 130 in melting crystallizer 210.
It is an important technical barrier always, this is because common during pulse current is introduced metallurgical reaction
Steelmaking process in, be that pulse current is imported by molten steel using conductive, heat safe material.But molten steel temperature generally exists
1600 DEG C or more, it is difficult to which finding a kind of material can be inserted into molten steel for a long time.And refractory material is bound in molten steel
Secondary pollution is generated to molten steel.Therefore, the key core problem that can this problem just be applied at pulse current.The present invention creates
Proposing for the property made applies pulse current in esr process so that esr process is solidified in fusing, gold
Belonging to electrode 130 just completely can be as the bringing device of pulse current, and pulse current is introduced into the molten steel solidified.
The pulse power 111 applies into metal bath 222 under pulse current effect, and faint disturbance is generated in metal bath 222, can
Promote the uniform of 222 temperature field of metal bath, to realize the feature similar to directional solidification growth；In addition, the pulse power 111
The lower molten bath flowing generated of the pulse current effect of generation can make the column crystal produced broken, generate more forming core cores
The heart improves the equiaxial crystal ratio of solidified structure to promote the conversion of column crystal orientation equiax crystal, and then it is solidifying to improve steel ingot
Stereoplasm amount.
The present embodiment remelting steel grade is 9Cr2Mo, a diameter of 400mm of crystallizer.Remelting starts preceding first by consumable metal 133
It is installed on the bottom of metal electrode 130, then the anode of high frequency pulse power supply 111 will be connected with metal electrode 130, by high frequency arteries and veins
The cathode for rushing power supply 111 is connected with bottom water case 310.111 frequency of high frequency pulse power supply is set as 10KHz, is used after ready
Graphite electrode slugging drops to the consumable metal 133 of metal electrode 130 in metal bath 222 after the completion of remelting slag melting
Adjustment electric current is 8000A, effective voltage 55V.
Embodiment 2
The substance of the present embodiment with embodiment 1, the difference is that, as shown in Fig. 2, a kind of use of the present embodiment
Bipolar electrode improves the device of electroslag remelting steel ingot Solidification Quality, including the pulse power 111, melting crystallizer 210, metal electrode
130 and bottom water case 310, bottom water case 310 is set to the bottom of melting crystallizer 210, for accommodating gold in melting crystallizer 210
Belong to molten bath 222 and electroslag layer 223, inside the insertion melting crystallizer 210 of metal electrode 130, the consumable of 130 bottom of metal electrode
Metal 133 is inserted into electroslag layer 223, and metal electrode 130 includes first electrode 131 and second electrode 132,131 He of first electrode
Second electrode 132 is connected with 111 positive and negative anodes of the pulse power respectively.First electrode 131 and second electrode 132 are arranged in parallel, and the
One electrode 131, second electrode 132 are parallel with crystallizer axial line 230.
The remelting steel grade of the present embodiment is H13, a diameter of 500mm of crystallizer.Remelting first pacifies consumable metal 133 before starting
Bottom loaded on metal electrode 130, then the anode of high frequency pulse power supply 111 will be connected with metal electrode 130, by high-frequency impulse
The cathode of power supply 111 is connected with bottom water case 310.111 frequency of high frequency pulse power supply is set as 20KHz, and stone is used after ready
The consumable metal 133 of metal electrode 130 is dropped in metal bath 222 and is adjusted after the completion of remelting slag melting by electrode ink slugging
Whole electric current is 9000A, effective voltage 55V.
Embodiment 3
The substance of the present embodiment with embodiment 2, the difference is that, as shown in figure 3, first electrode 131 with crystallization
The distance between device axial line 230 is d1, the distance between second electrode 132 and crystallizer axial line 230 are d2, and d1≠d2。
And it is that first electrode 131 and second electrode 132 are identical and be R, then d2>d1+ R, so that process of the bottom water case 310 in rotation
In, first electrode 131 and the electroslag layer 223 of second electrode 132 and liquid carry out relative motion, and first electrode 131 and second
The movement locus of electrode 132 differs, does not also coincide, and the inner layer metal to promote fusing is uniformly distributed in electroslag layer
In 223, the homogenization of inner layer metal distribution is not only increased, and the liquid metals of fusing is filled with electroslag layer 223
The reaction divided.The outside of melting crystallizer 210 is provided with vibration component 340, in the vibration component 340 and melting crystallizer 210
Metal bath 222 be correspondingly arranged, vibration component 340 vibrates melting crystallizer 210 so that metal bath 222 is cold
But during solidifying, crystal grain is refined, so that inner layer metal tissue is finer and close, while being made jointly with pulse current
With obtaining that steel ingot metal ingredient is more uniform, and then improve the quality of steel ingot.Vibration component 340 can be along melting crystallizer 210
Vertical direction moved so that vibration component 340 is corresponding with the metal bath 222 in melting crystallizer 210 always
Setting so that during cooled and solidified, crystal grain is refined metal bath 222, so that the interior tissue of steel ingot is more
Add densification.
The remelting steel grade of the present embodiment is 410 martensitic stain less steels, a diameter of 600mm of crystallizer.Remelting is first incited somebody to action before starting
Consumable metal 133 is installed on the bottom of metal electrode 130, then will be by the anode and 130 phase of metal electrode of high frequency pulse power supply 111
Even, the cathode of high frequency pulse power supply 111 is connected with bottom water case 310.111 frequency of high frequency pulse power supply is set as 30KHz, prepares
After the consumable metal 133 of metal electrode 130 dropped to by gold after the completion of remelting slag melting using graphite electrode slugging
It is 11500A, effective voltage 60V to belong to adjustment electric current in molten bath 222.
Embodiment 4
The substance of the present embodiment with embodiment 1, the difference is that, using the device produce composite roll, such as Fig. 4
Shown, melting crystallizer 210 is the hollow roll 211 of the outer layer metal for producing composite roll, is substituted with hollow roll 211
Crystallizer produces bimetallic composite roll.Composite roll smelting apparatus based on hollow roll as outer layer metal, including arteries and veins
Power supply 111, hollow roll 211, metal electrode 130 and bottom water case 310 are rushed, the bottom water case 310 is set to molten hollow roll 211
Bottom, for accommodating metal bath 222 and electroslag layer 223 in hollow roll 211；The insertion of metal electrode 130 is hollow to roll
Inside roller 211, the consumable metal 133 of 130 bottom of metal electrode is inserted into electroslag layer 223, the anode and metal of the pulse power 111
Electrode 130 is connected, and the cathode of the pulse power 111 is connected with bottom water case 310.Using the hollow roll of composite roll cladding material
211 as melting crystallizer 210, and the metal electrode 130 of inner layer material carries out remelting wherein, realizes having for ectonexine metal
It imitates compound.
The outside of hollow roll 211 is provided with cooling-part 330, cooling-part 330 along hollow roll 211 length side
To setting.Cooling spray 331 is provided on cooling-part 330, cooling spray 331 is used to spray to 211 surface of hollow roll and cool down
Water.The lower part of the bottom water case 310 of the present embodiment is provided with turntable 320, and turntable 320 is for driving bottom water case 310 to rotate, bottom
Water tank 310 is connected by brush with the cathode of the pulse power 111.The homogenization of internal layer composition tissue is not only promoted, but also is promoted
Into the production of inner layer metal tissue column crystal.It obtains cladding material to rotate with metal bath 222, and cladding material and metal
Also relative rotation occurs between molten bath 222, not only promotes the homogenization of internal layer composition tissue, but also promotes inner layer metal group
Knit the production of column crystal；In addition, the rotation of hollow roll 211 ensure that cooling water uniformly sprays the surface of cladding material,
So that the thickness of cladding material is uniform after the completion of remelting, and then improve the quality of production of composite roll.Lead to during melting
Supercooling component 330 carries out water-spraying control to the outer surface of hollow roll 211.
Composite roll method of smelting of the present embodiment based on hollow roll as outer layer metal, smelting apparatus is with hollow roll
211 outer layer metal as composite roll forms electroslag layer 223, metal electrode pouring into liquid slag in hollow roll 211
The consumable metal 133 of 130 bottoms is inserted into 223 layers of electroslag layer, then is powered and to be formed electrical circuit progress melting, during melting certainly
Enter metal bath 222 after consuming the fusing of metal 133, refining, 222 cooled and solidified of metal bath forms the internal layer gold of composite roll
Belong to.It is described in detail below：
Step 1: hollow hollow roll 211 is first installed on bottom water case 310 by remelting before starting, cooling is then opened
The cooling water of component 330, cooling spray 331 carry out water-spraying control to the outer surface of hollow roll 210, and the flow of cooling water is
30m3/ t, while starting slugging outside stove.
Step 2: after the completion of slag melting, liquid slag is poured into and forms electroslag layer 223 in hollow roll 211, then by metal
The consumable metal 133 of 130 bottom of electrode is inserted into 223 layers of electroslag layer, and the anode of the pulse power 111 is connected with metal electrode 130,
The cathode of the pulse power 111 is connected with bottom water case 310, and the energization of the pulse power 111 forms electrical circuit, the consumable of metal electrode 130
133 remelting of metal obtains composite roll after solidifying again.Wherein the pulse power 111 is high-frequency direct-current electric current, the frequency of the DC current
Rate is 10-30KHz.111 output current=180 of the pulse power~200*DKnotA, wherein DKnotFor crystallizer diameter/cm.The pulse power
111 output voltages=0.5*DKnot+ 27~37V, wherein DKnotFor crystallizer diameter/cm.After remelting stabilization, start turntable 320,
Turntable 320 drives hollow roll 210 to be rotated together with bottom water case 310, and the present embodiment rotating speed is 5r/min.
The outside of hollow roll 211 is provided with vibration component 340, the vibration component 340 and the metal in hollow roll 211
Molten bath 222 is correspondingly arranged, and vibration component 340 vibrates hollow roll 211 so that metal bath 222 is in cooled and solidified
In the process, crystal grain is refined so that inner layer metal tissue is finer and close, while with pulse current collective effect, obtain in
Layer metal ingredient is more uniform, realizes the effective compound of ectonexine metal, and then improve the quality of composite roll.Vibration section
Part 340 can be moved along the vertical direction of hollow roll 211 so that vibration component 340 always with hollow roll 211
Interior metal bath 222 is correspondingly arranged so that during cooled and solidified, crystal grain is refined metal bath 222, to make
It is finer and close to obtain inner layer metal tissue.
Embodiment 5
The substance of the present embodiment with embodiment 4, the difference is that, using the device produce composite roll, such as Fig. 6
It is shown, a kind of composite roll smelting apparatus using bipolar electrode of the present embodiment, including the pulse power 111, hollow roll 211,
Metal electrode 130 and bottom water case 310, bottom water case 310 are set to the bottom of hollow roll 211, are used to accommodate in hollow roll 211
Have a metal bath 222 and electroslag layer 223, inside the insertion hollow roll 211 of metal electrode 130,130 bottom of metal electrode from
It consumes metal 133 to be inserted into electroslag layer 223, metal electrode 130 includes first electrode 131 and second electrode 132, first electrode 131
It is connected respectively with 111 positive and negative anodes of the pulse power with second electrode 132.First electrode 131 and second electrode 132 are arranged in parallel, and
First electrode 131, second electrode 132 are parallel with crystallizer axial line 230.
The distance between first electrode 131 and crystallizer axial line 230 are d1, second electrode 132 and crystallizer axial line
The distance between 230 be d2, and d1≠d2.And it is that first electrode 131 and second electrode 132 are identical and be R, then d2>d1+ R, to
So that bottom water case 310, during rotation, first electrode 131 and second electrode 132 and the electroslag layer 223 of liquid carry out relatively
Movement, and the movement locus of first electrode 131 and second electrode 132 differs, does not also coincide, to promote in fusing
Layer metal is uniformly distributed in electroslag layer 223, not only increases the homogenization of inner layer metal distribution, and make the liquid of fusing
Body metal occurs adequately to react with electroslag layer 223.
The present invention is described in detail above in conjunction with specific exemplary embodiment.It is understood, however, that can not take off
It is carry out various modifications in the case of from the scope of the present invention being defined by the following claims and modification.Detailed description and drawings
Should be to be considered only as it is illustrative and not restrictive, if there is any such modifications and variations, then they all will
It falls into the scope of the present invention described here.In addition, background technology is intended to Development Status and meaning in order to illustrate this technology,
It is not intended to limit the application field of the present invention or the application and the present invention.
Claims (10)
1. a kind of method improving electroslag remelting steel ingot Solidification Quality, other are characterized in that：When being smelted using smelting apparatus,
The pulse current of the pulse power (111) is introduced into fusion process by metal electrode (130), and the pulse power (111), which is powered, to be formed
Electrical circuit, consumable metal (133) remelting of metal electrode (130) obtain steel ingot after solidifying again.
2. a kind of method improving electroslag remelting steel ingot Solidification Quality according to claim 2, other are characterized in that：Using
When smelting apparatus is smelted, the consumable metal (133) of metal electrode (130) is inserted into the liquid slag of melting crystallizer (210)
In, the anode of the pulse power (111) is connected with metal electrode (130), cathode and bottom water case (310) phase of the pulse power (111)
Even, the pulse power (111) energization forms electrical circuit, and consumable metal (133) remelting of metal electrode (130) obtains after solidifying again
Steel ingot.
3. a kind of method improving electroslag remelting steel ingot Solidification Quality according to claim 2, other are characterized in that：Using
When smelting apparatus is smelted, the consumable metal (133) of metal electrode (130) is inserted into the liquid slag of melting crystallizer (210)
In, metal electrode (130) includes first electrode (131) and second electrode (132), first electrode (131) and second electrode (132)
It is connected respectively with the pulse power (111) positive and negative anodes, the pulse power (111) energization forms electrical circuit, the consumable of metal electrode (130)
Metal (133) remelting obtains steel ingot after solidifying again.
4. a kind of method improving electroslag remelting steel ingot Solidification Quality according to claim 2, it is characterised in that：The arteries and veins
It is DC current to rush power supply (111), and the frequency of the DC current is 10-30KHz.
5. a kind of method improving electroslag remelting steel ingot Solidification Quality according to claim 2, it is characterised in that：Melting fills
It sets including the pulse power (111), melting crystallizer (210), metal electrode (130) and bottom water case (310), the bottom water case
(310) it is set to the bottom of melting crystallizer (210), is used to accommodate metal bath (222) and electricity in melting crystallizer (210)
Slag blanket (223)；The insertion melting crystallizer (210) of the metal electrode (130) is internal, the consumable of metal electrode (130) bottom
Metal (133) is inserted into electroslag layer (223), and the anode of the pulse power (111) is connected with metal electrode (130), the pulse power
(111) cathode is connected with bottom water case (310).
6. a kind of method improving electroslag remelting steel ingot Solidification Quality according to claim 3, other are characterized in that：Pulse
Power supply (111), melting crystallizer (210), metal electrode (130) and bottom water case (310), the bottom water case (310) are set to molten
The bottom of crystallizer (210) is refined, is used to accommodate metal bath (222) and electroslag layer (223) in melting crystallizer (210)；Institute
The insertion melting crystallizer (210) for stating metal electrode (130) is internal, and the consumable metal (133) of metal electrode (130) bottom is inserted into
In electroslag layer (223), metal electrode (130) includes first electrode (131) and second electrode (132), first electrode (131) and
Two electrodes (132) are connected with the pulse power (111) positive and negative anodes respectively.
7. according to a kind of method improving electroslag remelting steel ingot Solidification Quality of claim 1-6 any one of them, other features
It is：Graphite electrode is used to carry out slugging first before metal electrode (130) remelting.
8. according to a kind of method improving electroslag remelting steel ingot Solidification Quality of claim 1-6 any one of them, feature exists
In：The pulse power (111) output current=(180~200) * DKnotA, wherein DKnotFor crystallizer diameter/cm.
9. according to a kind of method improving electroslag remelting steel ingot Solidification Quality of claim 1-6 any one of them, feature exists
In：The pulse power (111) output voltage=0.5*DKnot+ (27~37) V, wherein DKnotFor crystallizer diameter/cm.
10. a kind of method improving electroslag remelting steel ingot Solidification Quality according to claim 5 or 6, it is characterised in that：Also
Including supporting mechanism (120), which includes vertical rack (121) and horizontal stand (122), horizontal stand
(122) one end is slidably mounted on vertical rack (121), and metal electrode (130) is installed on horizontal stand (122) far from vertical
One end of holder (121).
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| CN111286624A (en) * | 2020-03-31 | 2020-06-16 | 路蓉 | Electric furnace decomposition device for electroslag smelting |
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