CN108265179A - A kind of method that electrode billet exchanges remelting - Google Patents
A kind of method that electrode billet exchanges remelting Download PDFInfo
- Publication number
- CN108265179A CN108265179A CN201711280592.7A CN201711280592A CN108265179A CN 108265179 A CN108265179 A CN 108265179A CN 201711280592 A CN201711280592 A CN 201711280592A CN 108265179 A CN108265179 A CN 108265179A
- Authority
- CN
- China
- Prior art keywords
- electrode billet
- billet
- exchange
- electrode
- changing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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 relates to electroslag remelting technique fields.A kind of method that electrode billet exchanges remelting, during 30 minutes before exchanging every time start to exchange, the molten speed of electrode billet steps up 1.15M 1.25M kg/hr by M1 kgs/hr before changing, and electrode billet power failure before then changing starts to exchange electrode billet；After the completion of exchange, it changes rear electrode billet and lowers into and melting is prepared in crystallizer, when changing 100 millimeters of melt liquid level of the rear electrode billet in crystallizer, be initially powered up, it changes after rear electrode billet starts melting, it is 1.03 U2,1.05 U2 to adjust electrode billet voltage, in 15 minutes, then continuously decreases slag resistance, at subsequent 5 15 minutes, slag resistance is adjusted to N+4.5 milliohms to N+5 milliohms, after the slag bathization of device to be crystallized is clear, adjustment slag resistance is N milliohms.
Description
Technical field
The present invention relates to electroslag remelting technique fields.
Background technology
In electroslag remelting technique field, big ingot shape or super large ingot shape ESR ingot generally use single-station two or two are produced
More than electrode billet exchanges remelting, i.e., using A burners in set station power transmission slugging and melting, B burners have clamped electrode billet preheating
It is spare, treat A burners first close to melting to predetermined weight, B burner holding electrode bases screw in the station continue melting, such two
The production organization mode of an ESR ingot is finally smelted in secondary or multiple exchange.The production organization mode can be held burner is limited
Realized in weight range and produce big ingot shape or super large ingot weight ESR ingot, but exchange electrode correspond to ESR ingot ingot body position be also easy to produce it is all kinds of
Mass defect.But in the actual production process by exchange process technology controlling and process and other limitations, the electroslag ingot surface after remelting is handed over
Change place easily forms and connects note（The apparent irregular wrinkle defect of a circle existing for ESR ingot ingot body）, stream steel（ESR ingot ingot body
Molten steel irregularly fills the ingot body defect of formation to slag crust side caused by slag crust rupture, molten bath squeeze the factors such as overflow）, be mingled with
（It is mingled with and exchanges part field trash enrichment defect caused by electrode moment embedment slag bath causes molten bath short-term instability）Deng a system
Row mass defect, the lighter can manually save in reconditioning, and severe one seriously restricts production efficiency until be judged to waste product, cause quality into
This increase, lumber recovery reduces, delivery date extends.
Invention content
The technical problems to be solved by the invention are：Existing electrode billet is overcome to exchange the above-mentioned deficiency of the method for remelting, is carried
The method for exchanging remelting in the electrode billet for opening cover, the hidden danger of quality for proposing molten fast process formation is eliminated for a kind of.
The technical solution adopted in the present invention is：A kind of electrode billet exchanges the method for remelting, two or three electrode billets
It exchanges melting in turn in a crystallizer and forms an ingot casting, it is M1 kgs/hr that the standard of electrode billet, which melts speed, before changing, and changes rear electrode
It is M2 kgs/hr that the standard of base, which melts speed, and the standard slag resistance for changing rear electrode billet is N milliohms, the normal voltage of electrode billet before changing
For U1, the normal voltage for changing rear electrode billet is U2, and during 30 minutes before exchanging every time start to exchange, electrode billet is molten before changing
Speed steps up 1.15M-1.25M kgs/hr by M1 kgs/hr, and electrode billet has a power failure before then changing, and starts to exchange electrode
Base；It after the completion of exchange, changes rear electrode billet and lowers into melting is prepared in crystallizer, electrode billet is in crystallizer after changing
100 millimeters of melt liquid level when, be initially powered up, change after rear electrode billet starts melting, adjustment electrode billet voltage is 1.03 U2-
1.05 U2, in 15 minutes, by control slag resistance N+8 milliohms between N+10 milliohms come control current value be no more than 1
Kiloampere, adjustment speed of melting are 1.4 M2-1.6M2 kgs/hr, then continuously decrease slag resistance, in subsequent 5-15 minutes,
Slag resistance is adjusted to N+4.5 milliohms to N+5 milliohms, after the slag bathization of device to be crystallized is clear, adjustment slag resistance is N milliohms,
Adjustment changes rear electrode billet voltage as U2, starts normal smelting.
As a kind of preferred embodiment：During 30 minutes before each exchange start to exchange, by promoting voltage, before changing
The molten speed of electrode billet steps up 1.15M-1.25M kgs/hr by M1 kgs/hr, in specific lifting process, promotes speed
Degree control carried 1 volt at every 5 minutes, promoted 0.1 volt every time.
The beneficial effects of the invention are as follows：The method that electrode billet provided by the invention exchanges remelting realizes exchange student's electricity production
The stabilization of slag ingot, mass production.Stablized using the large-scale ESR ingot of technology production in forging pipe every field and used, production
Quality is stablized, and exchange in itself substantially eliminates the hidden danger of quality of ESR ingot, has reached reduction quality cost, shortens and smelts week
Phase.
Specific embodiment
The present embodiment
Austria's Yin Taike (INTECO) 8+8 electroslag furnace under protective Ar gas stove is selected to implement electroslag remelting, which uses two electrodes
Base swaps remelting, and the material of resmelting electrode base is 316 stainless steels, electrode billet for the sawing of cast electrode base end to end, after sawing
8.3 tons of electrode billet substance, electrode billet concentric reducer difference can be neglected, that is, change preceding electrode billet and change as rear electrode billet specification,
Diameter is all 800 millimeters, and length is all 2200 millimeters, a diameter of crystallizer height 1024 millimeters, used of crystallizer used
It is 3000 millimeters,
Two external melting stations can work independently, and each external melting station clamps an electrode billet, and single external melting station smelts
Maximum can smelt 10 tons of steel ingots, and the present embodiment requirement 16 tons of steel ingots of melting swap remelting using 8.3 tons of two electrode billets.
The operation of electroslag remelting and process
Two external melting stations each respectively clamp 8.3 tons of electrode billets.It changes preceding electrode billet and melts speed with the standard for changing rear electrode billet
Be 850 kgs/hr, change preceding electrode billet and change the standard of rear electrode billet and melt fast voltage for 80 volts, before exchange in 30 minutes by
Walk hoisting power, it is ensured that speed is melted during exchange and reaches 1000 kgs/hr, melts that speed is steady to be promoted, step promoted voltage reach with
Upper effect, voltage are promoted from 80 volts to 86 volts, are promoted speed control and are carried 1 volt at every 5 minutes, every time 0.1 volt of width
Degree.On the whole, voltage is slow compared to current response, and the exchange premise for stepping up voltage melts fast method.It on the one hand can be to prevent
Only molten bath（Molten bath refers in Electroslag Process slag liquid in crystallizer hereinafter, more than coagulated ingot body liquid metal part）Under power
Drop reduces depth of invasion, on the other hand can realize that process melts speed and steadily promoted, evades the fluctuation of generation molten bath.
Exchange process is realized by auto-programming, when electrode billet before changing is in melting, is changed rear electrode billet and is in preheating
Station clicks exchanger interface " OFF " button, closes auto-programming, and control manually swaps.Electrode billet electricity before click is changed
" OFF " button at the exchanger interface of source switch, electrode billet power supply power supply before closing is changed, manually control remove and change preceding electrode
Base, then control in-migration changes rear electrode billet manually, and after exchange, control manually is changed rear electrode billet and declined, stokehold 2-3 people observation, 1 people
In operating room operating system, drop to apart from liquid level be not more than 100 millimeters when, opening changes rear electrode billet power supply and starts melting, so
After continue Manual descending at a slow speed and change rear electrode billet, once finding that current value is more than 1 kiloampere, adjust slag resistance value at once, it is close
It cuts and observes practical slag resistance and the difference of setting slag resistance value, and carry out continuing adjustment.It needs to improve slag resistance after replacement（During according to having a power failure
Between, setting value can be improved to 8 to 10 milliamperes）, 3 to 6 volts of voltage is improved, closes melting speed control device, tilt control, observation
Curve fluctuates, and adjustment slag resistance is larger than smelting normal condition, and observe swing actual value, gradually reduces slag resistance value, makes control
Oscillating quantity is transitioned into 4.5-5.0 by 8.0（Transit time is not less than 20 minutes）, open tilt control；It is observed after stablizing molten
Fast actual value, adjustment voltage are close to molten fast setting value（In the range of 850 kgs/hr）, open melting speed control device.It is entire to adjust
Journey is had suffered, ensures that practical swing is in the range of 6%-8% as possible.After transitional period, slag resistance is gradually reduced, makes control oscillating quantity
4.5-5.0 is transitioned by 8.0（Transit time is not less than 20 minutes）, open tilt control；It is practical that molten speed is observed after stablizing
Value, adjustment voltage are close to molten fast setting value（In the range of 850 kgs/hr）, open melting speed control device.
Exchange process is first using A burners in set station power transmission slugging and melting, and it is pre- hot standby that B burners have clamped electrode billet
With, treat A burners first close to melting to predetermined weight, B burner holding electrode bases screw in the station continue melting, so twice
Or repeatedly exchange, finally smelt the production organization mode of an ESR ingot.
Claims (2)
1. a kind of method that electrode billet exchanges remelting, two or the exchange melting formation one in turn in a crystallizer of three electrode billets
A ingot casting, the standard of electrode billet melts speed for M1 kgs/hr before changing, and changing the standard of rear electrode billet, to melt speed be M2 kgs/hr, is changed
The standard slag resistance of electrode billet is N milliohms afterwards, and the normal voltage of electrode billet is U1 before changing, and the normal voltage for changing rear electrode billet is
U2, it is characterised in that：During 30 minutes before exchanging every time start to exchange, the molten speed of electrode billet is by M1 kgs/hr before changing
1.15M-1.25M kgs/hr is stepped up, electrode billet has a power failure before then changing, and starts to exchange electrode billet；After the completion of exchange,
It changes rear electrode billet and lowers into and melting is prepared in crystallizer, melt liquid level 100 of the electrode billet in crystallizer after changing
It during millimeter, is initially powered up, changes after rear electrode billet starts melting, adjustment electrode billet voltage was 1.03 U2-1.05 U2, at 15 minutes
It is interior, by control slag resistance N+8 milliohms between N+10 milliohms come control current value be no more than 1 kiloampere, adjust melting
Speed is 1.4 M2-1.6M2 kgs/hr, then continuously decreases slag resistance, in subsequent 5-15 minutes, slag is hindered and is adjusted to N+
4.5 milliohms are to N+5 milliohms, and after the slag bathization of device to be crystallized is clear, adjustment slag resistance is N milliohms, and rear electrode billet is changed in adjustment
Voltage is U2, starts normal smelting.
2. the method that a kind of electrode billet according to claim 1 exchanges remelting, it is characterised in that：30 points before each exchange
During clock starts to exchange, by promoting voltage, the molten speed of electrode billet steps up 1.15M- by M1 kgs/hr before changing
It 1.25M kgs/hr, in specific lifting process, promotes speed control and carried 1 volt at every 5 minutes, promote 0.1 volt every time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711280592.7A CN108265179B (en) | 2017-12-07 | 2017-12-07 | Electrode blank exchange remelting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711280592.7A CN108265179B (en) | 2017-12-07 | 2017-12-07 | Electrode blank exchange remelting method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108265179A true CN108265179A (en) | 2018-07-10 |
| CN108265179B CN108265179B (en) | 2019-12-17 |
Family
ID=62771992
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711280592.7A Active CN108265179B (en) | 2017-12-07 | 2017-12-07 | Electrode blank exchange remelting method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108265179B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109055771A (en) * | 2018-08-20 | 2018-12-21 | 东北大学秦皇岛分校 | ESR system and its electrode replace control device |
| CN112536428A (en) * | 2020-12-04 | 2021-03-23 | 东北特殊钢集团股份有限公司 | Production method of phi 1600 mm-phi 1850mm large-scale stripping electroslag ingot |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| UA50731U (en) * | 2009-12-03 | 2010-06-25 | Запорожский Национальный Технический Университет | Method for production of DETAILS billets of Random variable cross section by electroslag remelting |
| CN104789787A (en) * | 2015-05-08 | 2015-07-22 | 沈阳科金特种材料有限公司 | Electroslag remelting method for high-purity austenite nitrogenous stainless steel for nuclear power |
| US20160045952A1 (en) * | 2014-08-13 | 2016-02-18 | Northeastern University | Method for manufacturing hollow ingot for retaining ring of large generator by electroslag remelting |
| CN105567989A (en) * | 2016-01-06 | 2016-05-11 | 攀钢集团成都钢钒有限公司 | Smelting method for clean electroslag steel |
| CN105624418A (en) * | 2014-10-31 | 2016-06-01 | 西安扩力机电科技有限公司 | Control method for melting speed and power of vacuum consumable electrode arc furnace |
| CN105779780A (en) * | 2016-05-30 | 2016-07-20 | 重庆钢铁(集团)有限责任公司 | Electroslag remelting fluoride-free slag and electroslag remelting method thereof |
| CN105861848A (en) * | 2016-06-15 | 2016-08-17 | 重庆钢铁(集团)有限责任公司 | Method for preparing Fe-Mn alloy in electroslag remelting mode |
-
2017
- 2017-12-07 CN CN201711280592.7A patent/CN108265179B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| UA50731U (en) * | 2009-12-03 | 2010-06-25 | Запорожский Национальный Технический Университет | Method for production of DETAILS billets of Random variable cross section by 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 |
| CN105624418A (en) * | 2014-10-31 | 2016-06-01 | 西安扩力机电科技有限公司 | Control method for melting speed and power of vacuum consumable electrode arc furnace |
| CN104789787A (en) * | 2015-05-08 | 2015-07-22 | 沈阳科金特种材料有限公司 | Electroslag remelting method for high-purity austenite nitrogenous stainless steel for nuclear power |
| CN105567989A (en) * | 2016-01-06 | 2016-05-11 | 攀钢集团成都钢钒有限公司 | Smelting method for clean electroslag steel |
| CN105779780A (en) * | 2016-05-30 | 2016-07-20 | 重庆钢铁(集团)有限责任公司 | Electroslag remelting fluoride-free slag and electroslag remelting method thereof |
| CN105861848A (en) * | 2016-06-15 | 2016-08-17 | 重庆钢铁(集团)有限责任公司 | Method for preparing Fe-Mn alloy in electroslag remelting mode |
Non-Patent Citations (1)
| Title |
|---|
| 东北重型机械学院: "《钢铁冶炼工业》", 31 January 1981, 机械工业出版社 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109055771A (en) * | 2018-08-20 | 2018-12-21 | 东北大学秦皇岛分校 | ESR system and its electrode replace control device |
| CN112536428A (en) * | 2020-12-04 | 2021-03-23 | 东北特殊钢集团股份有限公司 | Production method of phi 1600 mm-phi 1850mm large-scale stripping electroslag ingot |
| CN112536428B (en) * | 2020-12-04 | 2022-07-15 | 东北特殊钢集团股份有限公司 | Production method of phi 1600 mm-phi 1850mm large-scale stripping electroslag ingot |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108265179B (en) | 2019-12-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| UA93651C2 (en) | Electroslag system for refinement or producing of metal and method for refinement and method for producing of metal | |
| JP5048222B2 (en) | Method for producing long ingots of active refractory metal alloys | |
| CN105838897B (en) | A kind of remelting processing for eliminating Electro Slag Remelting Steel pattern segregation | |
| CN107574322A (en) | A kind of method that electronic torch melting technology High Purity prepares nickel base superalloy | |
| CN105088094A (en) | Manufacturing method of nitrogen-controlled austenitic stainless steel large forging piece | |
| CN108265179A (en) | A kind of method that electrode billet exchanges remelting | |
| CN101205586A (en) | Method for smelting high-temperature alloy steel P91 | |
| US20210355554A1 (en) | Production apparatus and method for electric arc furnace steelmaking with fully continuous ultra-short process | |
| CN114318109B (en) | Method for smelting high-nitrogen die steel by using vacuum induction furnace and pressurized electroslag furnace | |
| CN109457119A (en) | A kind of simple method of controlling of titanium alloy vacuum consumable melting current voltage matches | |
| CN107142384A (en) | The preparation method of high-performance aluminium alloy wheel hub | |
| US6853672B2 (en) | Method for producing metal blocks or bars by melting off electrodes and device for carrying out this method | |
| CN104109760A (en) | Steel ingot medium-frequency induction furnace/electroslag furnace dual-smelting system and method and steel ingot | |
| CN104988270A (en) | Method for smelting pipeline steel with low cost | |
| CN102978413B (en) | Hundred-ton large-scale three-phase electroslag furnace feeding technique | |
| CN107365918A (en) | A kind of casting technique of aluminium alloy ingots | |
| KR102283343B1 (en) | Slag for electro slag remelting and the method for preparing ingot using the same | |
| RU2355964C2 (en) | Facility and method for operation of arc furnace | |
| JP2011173172A (en) | Method for producing long cast block of active high melting point metal alloy | |
| CN110170630A (en) | The equipment and its method of oxidizable copper chromium zirconium ternary alloy three-partalloy continuous casting and rolling | |
| CN114015889A (en) | Nitrogen-filled electroslag process for hollow billet cavity of nitrogen-containing steel | |
| CN103757436A (en) | Production process of special steel ingot pullout type continuous directionally-crystallized electroslag ingot with small micro-fracture surface | |
| JP2002086251A (en) | Method for continuously casting alloy | |
| JPS6037865B2 (en) | Refining method | |
| CN115109937B (en) | Electroslag remelting method for effectively controlling N08810 aluminum titanium components |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |