CN105803217B - A kind of method that sulfur bearing steel electroslag remelting sulphur is received high and is evenly distributed - Google Patents
A kind of method that sulfur bearing steel electroslag remelting sulphur is received high and is evenly distributed Download PDFInfo
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- CN105803217B CN105803217B CN201610256145.7A CN201610256145A CN105803217B CN 105803217 B CN105803217 B CN 105803217B CN 201610256145 A CN201610256145 A CN 201610256145A CN 105803217 B CN105803217 B CN 105803217B
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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
Abstract
The present invention provides a kind of method that sulfur bearing steel electroslag remelting sulphur is received high and is evenly distributed, using electroslag remelting process, consutrode is used as using sulfur bearing steel, using return slag and new remelting slag as electroslag, the element sulphur that can suppress in reflow process in sulfur bearing steel moves into electroslag, the loss of element sulphur in sulfur bearing steel esr process is reduced, reaches and protects sulphur purpose；Wherein, the slag that returns is that the recovery electroslag after electroslag remelting is carried out to sulfur bearing steel.When carrying out electroslag remelting to sulfur bearing steel with the inventive method, the control of sulfur content fluctuation range is within 7 ‰ in obtained steel ingot, the control of sulphur rate is protected more than 84%, it is good to protect sulphur effect, and sulfur content is evenly distributed in steel ingot, it ensure that sulfur bearing steel has good reliable performance, improve the lumber recovery of sulfur bearing steel.
Description
Technical field
The invention belongs to Summoning material electrometallurgy technical field, it is related to electrometallurgy technical field, and in particular to Yi Zhonghan
The method that sulphur steel electroslag remelting sulphur is received high and is evenly distributed.
Background technology
Automatic steel is to add a number of one or more kinds of sulphur, phosphorus, lead, calcium, selenium, tellurium etc. in steel easily to cut
Element is cut, to improve the steel alloy of its machinability, sulfur bearing steel is one kind of automatic steel.The automatic steel of China's production and foreign countries
The automatic steel of import is mainly reflected in the type, quantity and morphology Control of field trash not compared to a certain distance also be present
It is good, cause machinability and mechanical property to reach the requirement of user, can not especially meet to product quality requirement
The crucial part steel requirement such as higher rocket, aircraft.Therefore, the method for how developing high-quality automatic steel, development can
The domestic automatic steel of import is substituted, there is profound meaning.
Automatic steel is mainly produced using arc melting+double refining+continuous casting process both at home and abroad at present, using electricity
Slag Technology For Remelting is relatively fewer.Consult and the data of sulfur bearing steel prepared using electroslag remelting in the prior art, majority using ternary or
Quaternary acid slag, although taking some safeguard measures in reflow process, obtained Ingot Surface Quality is poor, and sulphur is received
Rate is relatively low, and particularly whole branch steel ingot sulphur genesis analysis is uneven, directly affects the performance of product；And existing electroslag remelting
In technology, slag blanket is passed through according to electroslag remelting feature metal drop, the sulphur in metal phase enters slag phase, and chemistry is mutually established with slag liquid
Balance, this process make it that the sulphur scaling loss of sulfur bearing steel is serious, and then make sulfur content in obtained steel ingot low, low quality.
The content of the invention
For deficiencies of the prior art, the technical problem to be solved in the present invention is：How a kind of sulfur-bearing is provided
The method that steel electroslag remelting sulphur is received high and is evenly distributed, protecting obtained sulfur bearing steel, sulphur effect is good, sulfur content is evenly distributed, energy
It is enough that there is good reliable performance.
Above-mentioned purpose is realized, the present invention adopts the following technical scheme that：A kind of sulfur bearing steel electroslag remelting sulphur is received high and is distributed
Uniform method, using electroslag remelting process, using sulfur bearing steel as consutrode, using return slag and new remelting slag as electricity
Slag, the slag that returns is that the recovery electroslag after electroslag remelting is carried out to sulfur bearing steel, can be suppressed in reflow process in sulfur bearing steel
Element sulphur moves into electroslag, reduces the loss of element sulphur in sulfur bearing steel esr process, reaches and protects sulphur purpose.
The present invention has found that the reaction that sulfur bearing steel is desulfurized in esr process mainly includes five steps by studying,
I.e. be respectively sulphur inside metal bath to steel-slag Interface Moving；Desulphurization reaction occurs on slag interface；Sulphur leaves slag interface
Moved to slag vapor interface；Sulphur is aoxidized by the oxygen in gas phase on slag-vapor interface；Sulfur oxide product leaves from slag-vapor interface
Into in gas phase, electroslag smelting desulfuration is related to altogether or protects sulphur depending on chemistry and electrolysis two react greatly：
Slag-metal reaction：
Gas-slag reaction：
Herein：[], (), { } are respectively metal phase, slag phase, gas phase.
In order to effectively reduce the removal efficiency of sulfur bearing steel element sulphur in esr process, the present invention is using return slag and newly
Remelting slag mixing is used as electroslag, and dynamic equilibrium can be established in advance in slag liquid phase by returning to the addition of slag, and element sulphur is in slag is returned
Exist with suitable state, when consutrode metal drop passes through slag blanket, because of (the S of existing relative saturation in slag phase2-) and gold
[O] during category fusing in consutrode is combined, therefore can suppress in metal phase the transfer of [S] to slag phase well, it is suppressed that reaction
Carry out to the right.Moreover, the return slag that the present invention adds also improves the purity of refining slag system so that the viscosity of refining slag system
Uprise, reduce the gas permeability of slag liquid, hinder slag liquid oxygen uptake, preferably suppress the progress of gasificating desulfurization reaction, further suppression
The element sulphur made in metal phase moves into slag phase, both can guarantee that the recovery rate of sulphur, causes the distribution of sulphur in steel ingot more again
Uniformly.
Further, the new remelting slag includes the component of following parts by weight：55~65 parts of CaF2, 15~25 parts of Al2O3, 5~
10 parts of MgO and 8~15 part of SiO2.From such new remelting basicity of slag low only 0.4, there is electrical conductivity low resistance height, viscosity
The advantages of lazy flow is good, and smelting process stability is good.
Further, the slag that returns is that above-mentioned new remelting slag is electric to the recovery after sulfur bearing steel progress electroslag remelting as electroslag
Slag, on the one hand can be because there is the S of relative saturation from such return slag in return slag2-And suppress in metal phase [S] to slag phase
Transfer；On the other hand, the return slag slag system degassing effect through remelting is good, and gas permeability is low.
Further, the mass ratio of the electroslag and the consutrode is 4~5:100；The electroslag gross mass number is
100 mass parts, wherein, return to slag and account for 40~60 mass parts, brand-new slag accounts for 40~60 mass parts.The such proportioning of selection can guarantee that
On the one hand electric slag refusion and smelting process stabilization, the return slag that the present invention adds can have the S of relative saturation because returning in slag2- and
Suppress the transfer of [S] to slag phase in metal phase, on the other hand also improve the purity of refining slag system so that the viscosity of refining slag system
Uprise, reduce the gas permeability of slag liquid, hinder slag liquid oxygen uptake, preferably suppress the progress of gasificating desulfurization reaction, further suppression
The element sulphur made in metal phase moves into slag phase, both can guarantee that the recovery rate of sulphur, causes the distribution of sulphur in steel ingot more again
Uniformly.
Further, above-mentioned preparation method specifically comprises the following steps：
1) slag charge prepares：The return slag is crushed and toasted 2~3 hours in 200~300 DEG C, by the new remelting slag
Toasted 6~8 hours in 700~800 DEG C；
2) starting the arc slag making：Using sulfur bearing steel as consutrode, electroslag refining furnace, the energization starting the arc, to the electroslag are assembled
New remelting slag is first added in the crystallizer of remelting furnace, and adds silicon calcium powder, sulphur and manganese powder into new remelting slag and carries out deoxidation, is treated
Return slag is added after the new remelting slag, silicon calcium powder, sulphur and manganese powder fusing, establishes slag bath；Wherein, the silicon calcium powder, sulphur
The mass ratio of sulphur, manganese powder and new remelting slag is 2~3:5~7:3~5:100；
3) melting：After step 2) the new remelting slag and return slag fusing, 8700~9100A of regulation electric current, voltage 54~
56V carries out melting to consutrode.
During specific preparation, afterheat baking first is carried out to returning to slag and new remelting slag respectively, fills the moisture of each slag system component
Point remove, new slag is first added during energization starting the arc slag making makes the well-established eutectic balance of each constituent element, then be gradually added into return slag (because
Slag is returned by the well-established eutectic balance of each constituent element of melting, is added after returning to slag)；And in new remelting slag add silicon calcium powder,
Sulphur and manganese powder deoxidation, silicon calcium powder is also added in sulfur bearing steel fusion process and carries out deoxidation, can so be reduced in slag system
Oxygen content, suppress gasificating desulfurization reaction, reduce sulphur loss, ensure the sulphur recovery rate of sulfur bearing steel.
Further, the above method also includes step 4) filling feeding：After the completion of step 3) consumable electrode melting, using interval
Formula feeding method carries out feeding to obtained sulfur-bearing steel ingot, and feeding starts power failure 2~3 minutes, and the regulation electric current that is powered is 5000~
6000A smelts 3~5 minutes, then has a power failure 2~3 minutes, and the 3000~4000A of regulation electric current that is powered smelts 2~3 minutes, then has a power failure 2
1500~2500A of power transmission smelts 3~5 minutes after~3 minutes, then powers off naturally.So steel ingot can be made to realize plentiful benefit
Contracting effect, the consistency of steel ingot is improved, avoid producing the loose situation of interior tissue.
Further, slag will be returned in step 1) and is crushed to granularity≤8mm, the small addition side of solid impurity particle is returned to after so crushing
Just, fusing is very fast；And slag bath will not cause fluctuation, stability is more preferable.
Further, the sulfur bearing steel is Y2Cr13Ni2Steel alloy；The Y2Cr13Ni2Steel alloy includes following percetage by weight
Composition：C 0.20~0.30%, Si≤0.50%, Mn 0.80~1.20%, P 0.08~0.15%, S 0.15~
0.25%th, Cr 12.00~14.00%, Ni 1.50~2.00%, surplus are iron.The present invention is to Y2Cr13Ni2Steel alloy suppresses
The effect of element sulphur removing is more preferable.
Further, the river bottom protection plate of the crystallizer is identical with sulfur bearing steel steel grade.So, the surface of steel ingot obtained will not be covered with
Other alloys or metal, obtained steel ingot purity are higher.
Compared with prior art, the present invention has the advantages that：
1st, the electroslag when present invention uses new remelting slag and returns to slag mixing as electroslag remelting, returns to the addition of slag in slag
Dynamic equilibrium can be established in liquid phase in advance, when consutrode metal drop passes through slag blanket, because of existing relative saturation in slag phase
(S2-) combined with [O] in consutrode during metal molten, therefore the transfer of [S] to slag phase can be suppressed in metal phase well, press down
Reaction has been made to carry out to the right；And the present invention returns to adding for slag and the viscosity of refining slag system is uprised, and reduces the ventilative of slag liquid
Property, hinder slag liquid oxygen uptake, preferably suppress the progress of gasificating desulfurization reaction, further inhibit element sulphur in metal phase to
Moved in slag phase, both can guarantee that the recovery rate of sulphur, cause that the distribution of sulphur in steel ingot is more uniform again.
When the 2nd, carrying out electroslag remelting to sulfur bearing steel using the inventive method, sulfur content fluctuation range controls in obtained steel ingot
Within 7 ‰, the control of sulphur rate is protected more than 84%, guarantor's sulphur effect is good, and sulfur content is evenly distributed in steel ingot, ensure that sulfur bearing steel
With good reliable performance, the lumber recovery of sulfur bearing steel is improved, disclosure satisfy that the high rocket of product quality requirement, aircraft etc. close
The part steel requirement of key.
3rd, the inventive method, which make use of, returns to slag as electroslag, has saved slag charge resource, has reduced production cost, and reduce
Pollution to environment, there is the advantages of environmental protection, sustainable development.
Embodiment
The present invention is described in further detail with reference to specific embodiment.The implementation case using the technology of the present invention as
Under the premise of implemented, now provide detailed embodiment and specific operating process illustrate the present invention it is creative, but
Protection scope of the present invention is not limited to following embodiment.
Aviation martensitic stain less steel Y is used in following embodiments2Cr13Ni2As consutrode, S contents are 0.21%,
The stainless steel Y2Cr13Ni2Standard requires that S is 0.15~0.25%.
Embodiment 1
A kind of method that sulfur bearing steel electroslag remelting sulphur is received high and is evenly distributed, comprises the following steps：
(1) electrode prepares：Production stainless steel Y is smelted using induction furnace2Cr13Ni2Consutrode；
(2) slag charge prepares：New remelting slag includes the component of following parts by weight：55 parts of CaF2, 25 parts of Al2O3, 8 parts of MgO and 12
Part SiO2, by new remelting slag at 800 DEG C afterheat baking 8 hours；Slag will be returned and be crushed to granularity≤8mm, and protected at 300 DEG C
Temperature 2 hours.
(3) starting the arc slag making：Using sulfur bearing steel as consutrode, electroslag refining furnace is assembled, electroslag refining furnace crystallizer
River bottom protection plate stainless steel Y2Cr13Ni2Material, using the energization starting the arc, the total amount of addition slag into the crystallizer of the electroslag refining furnace
For 50kg, return slag account for weight than 60 parts, as 30kg, new slag account for weight than 40 parts, as 20kg, and to new remelting slag
Middle addition 500g silicon calcium powders, 1200g sulphur and 700g manganese powders, return is added after the fusing of new slag, silicon calcium powder, sulphur and manganese powder
Slag, establish slag bath；
(4) normal smelting：After the new remelting slag of step (3) and return slag are completely melt, 8700~9100A of regulation electric current, electricity
54~56V is pressed to carry out melting to consutrode；
(5) feeding is filled：After the completion of step (4) consumable electrode melting, obtained sulfur-bearing steel ingot is carried out using batch (-type)
Feeding, feeding start to have a power failure 3 minutes, and the regulation electric current that is powered is that 5500A smelts 4 minutes, then is had a power failure 2 minutes, and be powered regulation electric current
3500A is smelted 2 minutes, then power transmission 2000A is powered off after smelting 3 minutes after having a power failure 2 minutes.
Sulfur content detection is carried out to obtained steel ingot, it is as a result as shown in table 2 below, present invention side is used as can be seen from Table 2
The sulfur bearing steel sulfur content that method electroslag remelting obtains is all qualified, and is evenly distributed, with consutrode stainless steel Y2Cr13Ni2In contain
Sulfur content (0.21%) is compared, and the present embodiment protects sulphur rate and reached 87%.
The sulfur content testing result of 2 embodiment of table 1
| 1-1 | S% | 1-2 | S% |
| Ingot head | 0.192 | Ingot head | 0.193 |
| In the middle part of steel ingot | 0.189 | In the middle part of steel ingot | 0.190 |
| Ingot butt | 0.186 | Ingot butt | 0.188 |
Embodiment 2
A kind of method that sulfur bearing steel electroslag remelting sulphur is received high and is evenly distributed, comprises the following steps：
(1) electrode prepares：Production stainless steel Y is smelted using induction furnace2Cr13Ni2Consutrode；
(2) slag charge prepares：New remelting slag includes the component of following parts by weight：65 parts of CaF2, 20 parts of Al2O3, 5 parts of MgO and 10
Part SiO2, by new remelting slag at 800 DEG C afterheat baking 8 hours；Slag will be returned and be crushed to granularity≤8mm, and protected at 300 DEG C
Temperature 2 hours.
(3) starting the arc slag making：Using sulfur bearing steel as consutrode, electroslag refining furnace is assembled, electroslag refining furnace crystallizer
River bottom protection plate stainless steel Y2Cr13Ni2Material, using the energization starting the arc, the total amount of addition slag into the crystallizer of the electroslag refining furnace
For 50kg, return slag account for weight than 50 parts, as 25kg, new slag account for weight than 50 parts, as 25kg, and to new remelting slag
Middle addition 650g silicon calcium powders, 1400g sulphur and 850g manganese powders, return is added after the fusing of new slag, silicon calcium powder, sulphur and manganese powder
Slag, establish slag bath；
(4) normal smelting：After the new remelting slag of step (3) and return slag are completely melt, 8700~9100A of regulation electric current, electricity
54~56V is pressed to carry out melting to consutrode；
(5) feeding is filled：After the completion of step (4) consumable electrode melting, obtained sulfur-bearing steel ingot is carried out using batch (-type)
Feeding, feeding start to have a power failure 3 minutes, and the regulation electric current that is powered is that 5500A smelts 4 minutes, then is had a power failure 2 minutes, and be powered regulation electric current
3500A is smelted 2 minutes, then power transmission 2000A is powered off after smelting 3 minutes after having a power failure 2 minutes.
Sulfur content detection is carried out to obtained steel ingot, it is as a result as shown in table 2 below, present invention side is used as can be seen from Table 2
The sulfur bearing steel sulfur content that method electroslag remelting obtains is all qualified, and is evenly distributed, with consutrode stainless steel Y2Cr13Ni2In contain
Sulfur content (0.21%) is compared, and the present embodiment protects sulphur rate and reached 86%.
The sulfur content testing result of 3 embodiment of table 2
| 2-1 | S% | 2-2 | S% |
| Ingot head | 0.189 | Ingot head | 0.191 |
| In the middle part of steel ingot | 0.185 | In the middle part of steel ingot | 0.187 |
| Ingot butt | 0.182 | Ingot butt | 0.184 |
Embodiment 3
A kind of method that sulfur bearing steel electroslag remelting sulphur is received high and is evenly distributed, comprises the following steps：
(1) electrode prepares：Production stainless steel Y is smelted using induction furnace2Cr13Ni2Consutrode；
(2) slag charge prepares：New remelting slag includes the component of following parts by weight：60 parts of CaF2, 20 parts of Al2O3, 5 parts of MgO and 15
Part SiO2, by new remelting slag at 800 DEG C afterheat baking 8 hours；Slag will be returned and be crushed to granularity≤8mm, and protected at 300 DEG C
Temperature 2 hours.
(3) starting the arc slag making：Using sulfur bearing steel as consutrode, electroslag refining furnace is assembled, electroslag refining furnace crystallizer
River bottom protection plate stainless steel Y2Cr13Ni2Material, using the energization starting the arc, the total amount of addition slag into the crystallizer of the electroslag refining furnace
For 50kg, return slag account for weight than 40 parts, as 20kg, new slag account for weight than 60 parts, as 30kg, and to new remelting slag
Middle addition 850g silicon calcium powders, 1800g sulphur and 1100g manganese powders, add and return after the fusing of new slag, silicon calcium powder, sulphur and manganese powder
Slag is returned, establishes slag bath；
(4) normal smelting：After the new remelting slag of step (3) and return slag are completely melt, 8700~9100A of regulation electric current, electricity
54~56V is pressed to carry out melting to consutrode；
(5) feeding is filled：After the completion of step (4) consumable electrode melting, obtained sulfur-bearing steel ingot is carried out using batch (-type)
Feeding, feeding start to have a power failure 3 minutes, and the regulation electric current that is powered is that 5500A smelts 4 minutes, then is had a power failure 2 minutes, and be powered regulation electric current
3500A is smelted 2 minutes, then power transmission 2000A is powered off after smelting 3 minutes after having a power failure 2 minutes.
Sulfur content detection is carried out to obtained steel ingot, it is as a result as shown in table 2 below, present invention side is used as can be seen from Table 2
The sulfur bearing steel sulfur content that method electroslag remelting obtains is all qualified, and is evenly distributed, with consutrode stainless steel Y2Cr13Ni2In contain
Sulfur content (0.21%) is compared, and the present embodiment protects sulphur rate and reached 84%.
The sulfur content testing result of 4 embodiment of table 3
| 3-1 | S% | 3-2 | S% |
| Ingot head | 0.182 | Ingot head | 0.186 |
| In the middle part of steel ingot | 0.181 | In the middle part of steel ingot | 0.182 |
| Ingot butt | 0.177 | Ingot butt | 0.178 |
Comparative example 1
Difference from Example 1 is only that the slag and the gross weight number of new remelting slag of returning is 100 parts, wherein,
Return to slag and account for 0~30 part, surplus is new remelting slag.Sulfur content detection is carried out to obtained steel ingot, it is as a result as shown in table 5 below, by
It can be seen that the sulfur bearing steel sulfur content that uses comparative example method electroslag remelting to obtain has, underproof (standard is table 5 for S
, and sulfur content skewness 0.15~0.25%).
The sulfur content testing result of 5 comparative example of table 1
| 1-1 | S% | 1-2 | S% |
| Ingot head | 0.172 | Ingot head | 0.180 |
| In the middle part of steel ingot | 0.159 | In the middle part of steel ingot | 0.161 |
| Ingot butt | 0.146 | Ingot butt | 0.143 |
Comparative example 2
Difference from Example 1 is only that the slag and the gross weight number of new remelting slag of returning is 100 parts, wherein,
Return to slag and account for 70~100 parts, surplus is new remelting slag.Sulfur content detection is carried out to obtained steel ingot, it is as a result as shown in table 6 below,
The sulfur bearing steel sulfur content for using comparative example method electroslag remelting to obtain as can be seen from Table 6 has that underproof (standard is for S
0.15~0.25%).
The sulfur content testing result of 6 comparative example of table 2
| 1-1 | S% | 1-2 | S% |
| Ingot head | 0.161 | Ingot head | 0.162 |
| In the middle part of steel ingot | 0.155 | In the middle part of steel ingot | 0.156 |
| Ingot butt | 0.143 | Ingot butt | 0.145 |
It can be seen from comparative example when the return slag content used is excessive or very few, the content of sulphur can all have not
Qualified, and sulfur content skewness；Only when accounting for 40~60 parts using present invention return slag, when surplus is new remelting slag
It is qualified that sulfur content can be obtained, the uniform sulfur-bearing steel ingot of sulphur content cloth, it can be seen that the inventive method achieves excellent technique effect.
Finally illustrate, the above embodiments are merely illustrative of the technical solutions of the present invention and it is unrestricted, although with reference to compared with
The present invention is described in detail good embodiment, it will be understood by those within the art that, can be to the skill of the present invention
Art scheme is modified or equivalent substitution, and without departing from the objective and scope of technical solution of the present invention, it all should cover at this
Among the right of invention.
Claims (4)
1. a kind of method that sulfur bearing steel electroslag remelting sulphur is received high and is evenly distributed, using electroslag remelting process, is made with sulfur bearing steel
For consutrode, it is characterised in that using slag and new remelting slag is returned as electroslag, the return slag is to carry out electricity to sulfur bearing steel
Recovery electroslag after slag remelting, the element sulphur that can suppress in reflow process in sulfur bearing steel move into electroslag, reduce sulfur bearing steel
The loss of element sulphur in esr process, reach and protect sulphur purpose；
The new remelting slag includes the component of following parts by weight：55~65 parts of CaF2, 15~25 parts of Al2O3, 5~10 parts of MgO and 8
~15 parts of SiO2；The slag that returns is to carry out the recovery electricity after electroslag remelting to sulfur bearing steel as electroslag using the new remelting slag
Slag；The electroslag gross mass number is 100 mass parts, wherein, return to slag and account for 40 ~ 60 mass parts；
Specifically comprise the following steps：
1）Slag charge prepares：The return slag is broken and toasted 2 ~ 3 hours in 200 ~ 300 DEG C, by the new remelting slag in 700 ~
800 DEG C are toasted 6 ~ 8 hours；
2）Starting the arc slag making：Using sulfur bearing steel as consutrode, electroslag refining furnace, the energization starting the arc, to the electroslag remelting are assembled
New remelting slag is first added in the crystallizer of stove, and adds silicon calcium powder, sulphur and manganese powder into new remelting slag and carries out deoxidation, is treated described
Return slag is added after new remelting slag, silicon calcium powder, sulphur and manganese powder fusing, establishes slag bath；Wherein, the silicon calcium powder, sulphur, manganese
The mass ratio of powder and new remelting slag is 2 ~ 3:5~7:3~5:100；
3）Melting：Step 2）After the new remelting slag and return slag fusing, 8700~9100A of regulation electric current, 54~56V pairs of voltage
Consutrode carries out melting；
4）Fill feeding：Step 3）After the completion of consumable electrode melting, obtained sulfur-bearing steel ingot is carried out using batch (-type) feeding method
Feeding, feeding start power failure 2~3 minutes, and the regulation electric current that is powered is that 5000 ~ 6000A smelts 3~5 minutes, then is had a power failure 2~3 points
Clock, the regulation electric current 3000 ~ 4000A that is powered smelt 2~3 minutes, then 1500 ~ 2500A of power transmission smelts 3~5 after having a power failure 2~3 minutes
Minute, then power off naturally.
2. the method that sulfur bearing steel electroslag remelting sulphur is received high and is evenly distributed according to claim 1, it is characterised in that step
1）The middle slag that will return is crushed to granularity≤8mm.
3. the method that sulfur bearing steel electroslag remelting sulphur is received high and is evenly distributed according to claim 1, it is characterised in that described
Sulfur bearing steel is Y2Cr13Ni2Steel alloy.
4. the method that sulfur bearing steel electroslag remelting sulphur is received high and is evenly distributed according to claim 1, it is characterised in that described
The river bottom protection plate of crystallizer and sulfur bearing steel steel grade phase.
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| CN109182775B (en) * | 2018-08-30 | 2020-11-27 | 河南中原特钢装备制造有限公司 | Martensitic precipitation hardening stainless steel electroslag remelting process |
| CN110358930B (en) * | 2019-08-13 | 2021-01-05 | 哈尔滨威尔焊接有限责任公司 | Electroslag remelting slag capable of protecting sulfur and electroslag remelting method |
| CN114635042A (en) * | 2022-03-23 | 2022-06-17 | 青海西钢特殊钢科技开发有限公司 | High-sulfur steel electroslag remelting slag and application |
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