CN109967722A - The method and device of riser feeding is carried out to large-scale casting ingot using pulse electromagnetic field - Google Patents
The method and device of riser feeding is carried out to large-scale casting ingot using pulse electromagnetic field Download PDFInfo
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- CN109967722A CN109967722A CN201910254659.2A CN201910254659A CN109967722A CN 109967722 A CN109967722 A CN 109967722A CN 201910254659 A CN201910254659 A CN 201910254659A CN 109967722 A CN109967722 A CN 109967722A
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- riser
- coil
- electromagnetic field
- pulse
- ingot
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- 238000005266 casting Methods 0.000 title claims abstract description 78
- 230000005672 electromagnetic field Effects 0.000 title claims abstract description 40
- 238000000034 method Methods 0.000 title claims abstract description 30
- 239000002184 metal Substances 0.000 claims abstract description 33
- 229910052751 metal Inorganic materials 0.000 claims abstract description 33
- 230000000694 effects Effects 0.000 claims abstract description 6
- 230000008014 freezing Effects 0.000 claims abstract description 5
- 238000007710 freezing Methods 0.000 claims abstract description 5
- 239000007788 liquid Substances 0.000 claims abstract description 5
- 238000009413 insulation Methods 0.000 claims abstract description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 12
- 229910052802 copper Inorganic materials 0.000 claims description 12
- 239000010949 copper Substances 0.000 claims description 12
- 238000007711 solidification Methods 0.000 claims description 11
- 230000008023 solidification Effects 0.000 claims description 11
- 239000000498 cooling water Substances 0.000 claims description 6
- 239000011819 refractory material Substances 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 3
- 238000007670 refining Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 7
- 239000004576 sand Substances 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 239000011324 bead Substances 0.000 description 2
- 238000007667 floating Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000003031 feeding effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000006911 nucleation Effects 0.000 description 1
- 238000010899 nucleation Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
- B22D27/02—Use of electric or magnetic effects
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
- B22D27/04—Influencing the temperature of the metal, e.g. by heating or cooling the mould
- B22D27/06—Heating the top discard of ingots
Abstract
A kind of method and device carrying out riser feeding to large-scale casting ingot using pulse electromagnetic field, method is that one layer or more equidistant or non-isometric coil is arranged at the riser of casting mold upper end, and the coil connects pulse current generating device；Wherein, the coil and casting mold are non-contact and form insulation, and coil when metal freezing at riser is under pulse current generating device effect, and whole process or half way are to applying pulse electromagnetic field inside melt.Device includes the riser for forming the casting mold of ingot casting for molten metal and being arranged on the casting mold, it is provided with outside the side wall of the riser for being heated to riser, extend the coil of riser inner metal liquid setting time, the pulse current generating device outside the coil connection.The present invention is while improving riser feeding ability, moreover it is possible to play the role of refining riser root solidified structure, to improve the utilization rate of ingot casting.
Description
Technical field
The present invention relates to a kind of large-scale casting ingots to carry out riser feeding method.Pulse electromagnetic field pair is utilized more particularly to a kind of
The method and device of large-scale casting ingot progress riser feeding.
Background technique
The fine and close ingot casting of no shrinkage cavity shrinkage porosity is always the target that Steel Castings are pursued, therefore feeding is casting ingot process design
Key problem.In the production of common ingot casting, there are mainly four types of modes for system of risers: (1) sand riser feeding；(2) common to protect
Warm riser；(3) exothermic riser；(4) riser is heated.The characteristics of that there are still feeding efficiencies is low for several riser, higher cost.It realizes suitable
Sequence solidification, reduction dendritic arm spacing are the key that realize ingot casting feeding.The temperature field of ingot casting and both riser determines that solidification is suitable
The temperature of sequence, riser necessarily is greater than the temperature of ingot casting.The thermal loss of riser part is reduced, the setting time of riser part is extended
It is the effective measures for solving the problems, such as this.
The electromagnetism stress effect and joule heating effect that pulse electromagnetic field acts on metal bath generation are to metal bath inside stream
The distribution of field, temperature field has a certain impact, and can thinning metal solidification texture.The present invention will be using pulse electromagnetic field to metal
The affecting laws of process of setting and solidified structure improve the feeding capacity of ingot casting riser, and reduce production cost.
Summary of the invention
The technical problem to be solved by the invention is to provide the utilizations that one kind can obtain the fine and close high ingot casting of few shrinkage cavity shrinkage porosity
Pulse electromagnetic field carries out the method and device of riser feeding to large-scale casting ingot.
The technical scheme adopted by the invention is that: a kind of side carrying out riser feeding to large-scale casting ingot using pulse electromagnetic field
One layer or more equidistant or non-isometric coil is arranged at the riser of casting mold upper end method, and the coil connects pulse current
Generating device；Wherein, the coil and casting mold are non-contact and form insulation, and coil when metal freezing at riser is in pulse
Under current generating apparatus effect, whole or half way is to applying pulse electromagnetic field inside melt.
The coil is arranged at the riser of casting mold upper end, is that coil is embedded in the riser wall or setting exists
The outside of the riser wall.
The coil and the riser close between the riser wall of metal bath side at a distance of 0.5mm~1000mm, institute
At a distance of 0.5mm~500mm between the coil stated and the casting mold upper end wall, the coil turn is 1~100, and the number of plies is 1~50
Layer.
The coil is made of hollow copper tubing, and in ingot casting, recirculated cooling water progress is cold in the hollow copper tubing
But.
The pulse current peak of the pulse current generating device is 10~30000A, and pulse width is 10 μ s~100ms；
Pulse frequency are as follows: 0.01Hz~4KHz.
A kind of dress for the method described in claim 1 for carrying out riser feeding to large-scale casting ingot using pulse electromagnetic field
It sets, includes the casting mold for molten metal molding ingot casting and the riser that is arranged on the casting mold, outside the side wall of the riser
It is provided with for being heated to riser, the coil of extension riser inner metal liquid setting time, outside the coil connection
Pulse current generating device.
The coil covers in the outside of the riser side wall, alternatively, a ring gap is formed in the side wall of the riser,
The coil is embedded in the gap.
When the coil is covered at the outside of the riser side wall, phase between the coil and the side wall of the riser
Away from 0.5mm~1000mm, and it is embedded in refractory material；When the coil is embedded in the gap, the coil with
The riser is closed at a distance of 0.5mm~1000mm between the riser wall of molten metal side, and the coil is upper with the casting mold
Spatial embedding refractory material between end wall other than 0.5mm~500mm, the gap interior loop.
The coil be for hollow copper tubing structure, when casting ingot in the hollow copper tubing circulation for cooling
Cooling water.
The pulse current peak of the pulse current generating device is 10~30000A, and pulse width is 10 μ s~100ms；
Pulse frequency are as follows: 0.01Hz~4KHz.
The method and device for being carried out riser feeding to large-scale casting ingot using pulse electromagnetic field of the invention, is mended improving riser
While contracting ability, moreover it is possible to play the role of refining riser root solidified structure, to improve the utilization rate of ingot casting.Of the invention
Beneficial effect is:
(1) riser pulse electromagnetic field Feeding, it is contactless multilayer is equidistant or non-equidistant coil is placed in riser buss
In or riser buss outside, may be implemented to heat riser, extend the riser partially solidified time, and thinning solidification structure mentions
The purpose of high ingot casting consistency.
(2) the non-contact multi-layer coil working environment that riser pulse magneto oscillation thinning metal solidification texture technology uses
Well, sustainable work and Reusability.
(3) equipment price of the present invention is cheap, safety easy to operate, can be used for the refinement control of ingot casting metal solidification texture, tears open
Dress is convenient.
Detailed description of the invention
Fig. 1 is the structure of the device for carrying out riser feeding method to large-scale casting ingot using pulse electromagnetic field of the invention
Schematic diagram；
Inside ingot Temperature Distribution schematic diagram when Fig. 2 a is non-electromagnetic field processing；
Fig. 2 b is inside ingot Temperature Distribution schematic diagram when having electromagnetic field processing；
Ingot macrostructure schematic diagram when Fig. 3 a is non-electromagnetic field processing；
Fig. 3 b is ingot macrostructure schematic diagram when having electromagnetic field processing；
Ingot microstructure schematic diagram when Fig. 3 c is non-electromagnetic field processing；
Fig. 3 d is ingot microstructure schematic diagram when having electromagnetic field processing.
In figure
1: molten metal 2: casting mold
2.1: upper end wall 3: riser
3.1: riser wall 4: coil
5: pulse current generating device 6: gap
Specific embodiment
Riser feeding is carried out to large-scale casting ingot using pulse electromagnetic field to of the invention below with reference to embodiment and attached drawing
Method and device is described in detail.
The of the invention method that riser feeding is carried out to large-scale casting ingot using pulse electromagnetic field, be by one layer or more equidistantly or
Non-isometric coil is arranged at the riser of casting mold upper end, and the coil connects pulse current generating device, the coil
It is to be made of hollow copper tubing, in ingot casting, recirculated cooling water is cooled down in the hollow copper tubing.Wherein, the coil
It can be built-in in the riser wall, alternatively, can be the outside that the riser wall is arranged in.The coil and casting
Type is non-contact and forms insulation, and coil when metal freezing at riser is whole or partly under pulse current generating device effect
Journey is to applying pulse electromagnetic field inside melt.
The coil and the riser close between the riser wall of metal bath side at a distance of 0.5mm~1000mm, institute
At a distance of 0.5mm~500mm between the coil stated and the casting mold upper end wall, the coil turn is 1~100, and the number of plies is 1~50
Layer.
The pulse current peak of the pulse current generating device is 10~30000A, and pulse width is 10 μ s~100ms；
Pulse frequency are as follows: 0.01Hz~4KHz.
Metal bath is injected into casting mold, (unbalanced pulse current generating apparatus and metal are molten for unbalanced pulse current generating apparatus
Body injection casting mold does not have strict sequence), it can work.
As shown in Figure 1, the dress of the method for carrying out riser feeding to large-scale casting ingot using pulse electromagnetic field of the invention
It sets, includes the riser 3 for forming the casting mold 2 of ingot casting for molten metal 1 and being arranged on the casting mold 2, the side of the riser 3
It is provided with outside wall for being heated to riser, extends the coil 4 of 1 setting time of riser inner metal liquid, the coil 4 connects
External pulse current generating device 5, the coil are for hollow copper tubing structure, and when ingot casting is followed in the hollow copper tubing
Cooling water of the ring for cooling.
4 sets of the coil outsides in 3 side wall of riser, alternatively, being formed in the side wall of the riser 3 between a circle
Gap 6, the coil 4 are embedded in the gap 6.Wherein, when 4 sets of the coil outsides in 3 side wall of riser
When, at a distance of 0.5mm~1000mm between the coil 4 and the side wall of the riser 3, and it is embedded in refractory material；When described
When coil 4 is embedded in the gap 6, the coil 4 and the riser 3 close on 1 side of molten metal riser wall 3.1 it
Between at a distance of 0.5mm~1000mm, at a distance of 0.5mm~500mm, institute between the coil 4 and the upper end wall 2.1 of the casting mold 2
Spatial embedding refractory material other than 6 interior loop 4 of gap stated.
The pulse current peak of the pulse current generating device is 10~30000A, and pulse width is 10 μ s~100ms；
Pulse frequency are as follows: 0.01Hz~4KHz.
The present invention makes nearby to produce by plesiotype wall by acting on pulse electromagnetic field near riser in Casting Ingot Solidification Process
Raw induction field, numerical simulation result show that the Joule heat of generation can be improved the temperature of metal bath, extend at riser
Setting time guarantees have enough liquid and sufficient time to supplement inside ingot.And the nucleus at type wall is existed
To inside melt under the action of electromagnetic force, the nucleation rate inside melt is improved, changes arborescent structure to globular crystal tissue,
Reduce dendritic arm spacing, improves the consistency of ingot casting.Contactless multilayer is equidistant or non-equidistant coil is in riser buss or emits
Outside muzzle, and the whole or half way work in metal solidification process, achieve the purpose that feeding and thinning metal solidification texture.
An example is given below:
The solidified structure of riser pulse electromagnetic field processing 30Cr2Ni4MoV steel.
Experimentation is as follows: experimental material be rotor steel 30Cr2Ni4MoV, mold material is sand mold, in riser buss every
Hot material is floating bead, and non-contact multi-layer coil the number of turns is 14, the number of plies 1.Riser pulse is carried out in the entire metal freezing stage
Electromagnetic field processing.Specific embodiment is as follows:
(1) non-contact multi-layer coil is embedded in floating bead in advance, and assembles riser buss and sand mold.(as shown in Figure 1)
(2) sand mold is preheated to 200 DEG C.
(3) mode for the metal bath teeming for being 1550 DEG C by the degree of superheat pours into sand mold, at this time metal bath outer surface
Away from non-contact multi-layer coil 10mm.
(4) unbalanced pulse current generating apparatus, wherein current peak 200A, electric current pulsewidth 50ms, acting frequency 0.5Hz.
(5) it completely after solidification, cuts off the power, stopping processing.
After experiment, riser part is cut off, observes the macrostructure in ingot casting vertical section.As can be seen that through pulse electricity
After the processing of magnetic field, the depth of ingot casting concentrating shrinkage cavity by it is untreated when 255mm (untreated ingot Fig. 3 a) reduce to treated
147mm (handles ingot Fig. 3 b), and shrinkage porosite is serious in the untreated ingot (Fig. 3 c) in ingot body part, apparent hole occurs, and through pulse
Treated ingot casting (Fig. 3 d) that tissue is very fine and close for electromagnetic field, illustrates the good feeding effect of pulse electromagnetic field.
Claims (10)
1. a kind of method for carrying out riser feeding to large-scale casting ingot using pulse electromagnetic field, which is characterized in that by one layer with first-class
Away from or non-isometric coil be arranged at the riser of casting mold upper end, the coil connects pulse current generating device；Wherein, institute
The coil stated and casting mold be non-contact and form insulation, and coil when metal freezing at riser is in pulse current generating device effect
Under, whole or half way is to applying pulse electromagnetic field inside melt.
2. the method according to claim 1 for carrying out riser feeding to large-scale casting ingot using pulse electromagnetic field, feature exist
In the coil is arranged at the riser of casting mold upper end, is that coil is embedded in the riser wall or is arranged described
Riser wall outside.
3. the method according to claim 2 for carrying out riser feeding to large-scale casting ingot using pulse electromagnetic field, feature exist
In the coil and the riser close between the riser wall of metal bath side at a distance of 0.5mm~1000mm, the line
At a distance of 0.5mm~500mm between circle and the casting mold upper end wall, the coil turn is 1~100, and the number of plies is 1~50 layer.
4. the method according to claim 1 for carrying out riser feeding to large-scale casting ingot using pulse electromagnetic field, feature exist
In the coil is made of hollow copper tubing, and in ingot casting, recirculated cooling water is cooled down in the hollow copper tubing.
5. the method according to claim 1 for carrying out riser feeding to large-scale casting ingot using pulse electromagnetic field, feature exist
In the pulse current peak of the pulse current generating device is 10~30000A, and pulse width is 10 μ s~100ms；Pulse
Frequency are as follows: 0.01Hz~4KHz.
6. a kind of dress for the method described in claim 1 for carrying out riser feeding to large-scale casting ingot using pulse electromagnetic field
It sets, includes the riser (3) for forming the casting mold (2) of ingot casting for molten metal (1) and being arranged on the casting mold (2), feature
It is, is provided with outside the side wall of the riser (3) for being heated to riser, when extending riser inner metal liquid (1) solidification
Between coil (4), the coil (4) connection outside pulse current generating device (5).
7. according to claim 6 for carrying out the dress of the method for riser feeding to large-scale casting ingot using pulse electromagnetic field
It sets, which is characterized in that the coil (4) covers in the outside of the riser (3) side wall, alternatively, in the side wall of the riser (3)
It is formed with a ring gap (6), the coil (4) is embedded in the gap (6).
8. according to claim 7 for carrying out the dress of the method for riser feeding to large-scale casting ingot using pulse electromagnetic field
Set, which is characterized in that when the coil (4) is covered at the outside of the riser (3) side wall, the coil (4) with it is described
At a distance of 0.5mm~1000mm between the side wall of riser (3), and it is embedded in refractory material；Described in being embedded in when the coil (4)
When gap (6) is interior, the coil (4) and the riser (3) close between the riser wall (3.1) of molten metal (1) side apart
At a distance of 0.5mm~500mm, institute between the upper end wall (2.1) of 0.5mm~1000mm, the coil (4) and the casting mold (2)
Spatial embedding refractory material other than gap (6) interior loop (4) stated.
9. according to claim 6 for carrying out the dress of the method for riser feeding to large-scale casting ingot using pulse electromagnetic field
It sets, which is characterized in that the coil is recycled and is used in the hollow copper tubing when casting ingot for hollow copper tubing structure
The cooling water of cooling.
10. according to claim 6 for carrying out the dress of the method for riser feeding to large-scale casting ingot using pulse electromagnetic field
Set, which is characterized in that the pulse current peak of the pulse current generating device be 10~30000A, pulse width be 10 μ s~
100ms；Pulse frequency are as follows: 0.01Hz~4KHz.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910254659.2A CN109967722A (en) | 2019-03-31 | 2019-03-31 | The method and device of riser feeding is carried out to large-scale casting ingot using pulse electromagnetic field |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910254659.2A CN109967722A (en) | 2019-03-31 | 2019-03-31 | The method and device of riser feeding is carried out to large-scale casting ingot using pulse electromagnetic field |
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| Publication Number | Publication Date |
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| CN109967722A true CN109967722A (en) | 2019-07-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910254659.2A Pending CN109967722A (en) | 2019-03-31 | 2019-03-31 | The method and device of riser feeding is carried out to large-scale casting ingot using pulse electromagnetic field |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU126996A1 (en) * | 1959-06-01 | 1959-11-30 | С.П. Бакуменко | The method of heating the profitable part of the ingot |
| JPS57177853A (en) * | 1981-04-23 | 1982-11-01 | Kawasaki Steel Corp | Method and device for production of steel ingot of less segregation |
| WO2014177052A1 (en) * | 2013-05-03 | 2014-11-06 | 燕山大学 | Induction heating and electromagnetic stirring device for riser head of steel ingot |
| CN104439195A (en) * | 2014-09-03 | 2015-03-25 | 上海大学 | Method for refining metal solidification structure through riser pulse magneto oscillation |
| CN107150116A (en) * | 2017-05-10 | 2017-09-12 | 辽宁科技大学 | A kind of method that electromagnetism regulation and control manufacture large-sized casting ingot from inoculation |
| CN107214322A (en) * | 2017-04-17 | 2017-09-29 | 上海大学 | Magnetostatic field composite rotating magnetic field homogenizes the method and its device of large-sized casting ingot solidified structure |
| CN209998347U (en) * | 2019-03-31 | 2020-01-31 | 唐山学院 | Device for feeding dead head of large-sized cast ingot by using pulse electromagnetic field |
-
2019
- 2019-03-31 CN CN201910254659.2A patent/CN109967722A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU126996A1 (en) * | 1959-06-01 | 1959-11-30 | С.П. Бакуменко | The method of heating the profitable part of the ingot |
| JPS57177853A (en) * | 1981-04-23 | 1982-11-01 | Kawasaki Steel Corp | Method and device for production of steel ingot of less segregation |
| WO2014177052A1 (en) * | 2013-05-03 | 2014-11-06 | 燕山大学 | Induction heating and electromagnetic stirring device for riser head of steel ingot |
| CN104439195A (en) * | 2014-09-03 | 2015-03-25 | 上海大学 | Method for refining metal solidification structure through riser pulse magneto oscillation |
| CN107214322A (en) * | 2017-04-17 | 2017-09-29 | 上海大学 | Magnetostatic field composite rotating magnetic field homogenizes the method and its device of large-sized casting ingot solidified structure |
| CN107150116A (en) * | 2017-05-10 | 2017-09-12 | 辽宁科技大学 | A kind of method that electromagnetism regulation and control manufacture large-sized casting ingot from inoculation |
| CN209998347U (en) * | 2019-03-31 | 2020-01-31 | 唐山学院 | Device for feeding dead head of large-sized cast ingot by using pulse electromagnetic field |
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Application publication date: 20190705 |