CN1049852C - Device for realizing semisolid casting - Google Patents
Device for realizing semisolid casting Download PDFInfo
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- CN1049852C CN1049852C CN95107697A CN95107697A CN1049852C CN 1049852 C CN1049852 C CN 1049852C CN 95107697 A CN95107697 A CN 95107697A CN 95107697 A CN95107697 A CN 95107697A CN 1049852 C CN1049852 C CN 1049852C
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- condenser
- mouth
- river
- water gap
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Abstract
The present invention relates to a device capable of realizing half-solidifying casting, namely an electromagnetic condenser which belongs to auxiliary devices for continuously casting metal. The device is composed of a condenser and two groups of different coils distributed on the upper part and the lower part of the periphery of the condenser, wherein electromagnetic force produced by the two groups of coils are distributed in opposite directions, the condenser is composed of a water gap and a cooling water jacket arranged on the periphery of the water gap, the horizontal cross section of the water gap presents a circle, and the water gap is made from a fire-resistant material. In the device, the water gap has the advantages of simple inner structure and easy production. Metal liquid enters a crystallizer through the device so as to be in the half-solidified state; thus, the defects of aliquation, cracks, etc. caused by the solidification of branch crystals can be overcome, and the quality can be improved.
Description
The invention belongs to the continuous casting of metal field, be specially adapted to the special steel continuous casting, be used to eliminate the center segregation of steel.
Center segregation is one of major defect that exists in the continuous casting billet, and especially at the special steel continuous casting, this problem is particularly outstanding.In order to reduce defective, people develop various methods, as: pressure distortion technology of cast cold, electromagnetic agitation, solidification end or the like.But also do not obtain satisfied result at present.Analyze its reason, we think pourings under full liquid state of existing processes, and its process of setting is to carry out in the dendrite mode.
In recent years, Belgian Centre De Recherches Metallurgiques (CRM) has succeeded in developing the heat exchange mouth of a river (HJN), from reducing the degree of superheat of molten steel, attempts to change pouring mode under traditional full liquid state.This method is the molten steel that will flow out from tundish, through the refractory material mouth of a river of water-cooled, reduces the degree of superheat of molten steel.At present, realized casting, and shown that through the pouring test of bloom the center segregation of steel obviously reduces near liquidus temperature.(Mars 1993 is P.395-401 for P.Naveall, " Development of a heat exchanger forcasting with low superheat " Rev.Met.-CIT) still, this method has following problem:
(1) though, this method realized the casting near liquidus temperature, but the mode that remains under the full liquid state is cast.Because the still dendrite mode of the process of setting of steel is carried out, and therefore, still exists center segregation in the strand.
(2), heat exchange water mouth structure complexity, make difficulty.
(3), this method is not suitable for the cast of big flow molten steel.
The objective of the invention is to be to provide a kind of and can eliminate center segregation and semisolid casting device simple in structure.
Based on the foregoing invention purpose, the method applied in the present invention is the semisolid casting method, it is based on the principle that non-dendritic solidification mode in the rheocasting can reduce or eliminate gross segregation effectively, this method is that the molten steel that tundish flows out is flowed into the cooling of electromagnetism condenser, solidifies, in the cooled and solidified process of molten steel, molten steel is imposed the stirring of horizontal electromagnetic force, with the dendrite in the broken molten steel, obtain to contain the semi-solid metal of some solid phase particles, realize the semisolid casting of steel.
In order to realize said method, the invention provides a kind of electromagnetism condenser, be characterized in that it is by molten steel cooling, the condenser that solidifies and the electromagnetic induction coil that can produce rotating excitation field in condenser are formed, described condenser is made up of the cooling jacket of the mouth of a river and periphery, the mouth of a river, described electromagnetic induction coil is made up of upper and lower two groups of different coils around being distributed in condenser, and two groups of electromagnetic forces that coil produced are rightabout and distribute.
In the said apparatus, the horizontal cross-section at the mouth of a river is a garden shape in the described condenser, and its material is a refractory material.
In the said method, solid phase particles percentage contained in the temperature of semisolid casting or the semi-solid metal can be regulated according to the water yield in the condenser, and the control temperature is below the liquidus curve of metal.
Because liquid metals is under the effect of horizontal mixing power, can cause that liquid metals rises along the condenser wall, for this reason, the present invention adopts two groups of different coils arranging up and down, to apply rightabout electromagnetic force, the effect that wherein is positioned at the peripheral upper coil of condenser is the rising that suppresses the condenser molten steel, also can stir condenser internal upper part molten steel simultaneously; And the major function that is positioned at the peripheral lower coil of condenser is the condenser molten steel to be carried out brute force stir, and with broken dendrite, forms the semi-solid metal that contains certain solid rate.
Compared with prior art, the invention has the advantages that:
(1), can change traditional full liquid-state casting.Alloy enters crystallizer from semi-solid metal slurry, can thoroughly change common process of setting, and defectives such as the segregation that elimination brings because of dendrite solidifies, crackle improve the quality.
(2), partly solidify casting because of some solid phase crystalline substance goes out, reduced latent heat of solidification, thus little to the crystallizer thermal shock, the life-span that can improve crystallizer, also can shorten setting time greatly, increase pulling rate, boost productivity.
(3), mouth of a river internal structure is simple, easy to manufacture in this device.
(4), this method is applicable to the cast of different flow condition.
Below in conjunction with accompanying drawing the present invention is further described.
Fig. 1 is a semisolid casting device cross-sectional view of the present invention.
Fig. 2 is the schematic diagram of the present invention present position in casting process.
Among Fig. 1, Fig. 2,1 is condenser, and 2 is the mouth of a river, and 3 is cooling jacket, 4 is the cooling jacket import, 5 are the cooling jacket outlet, and 6 is the peripheral top of cooler electromagnetic induction coil, and 7 is the peripheral bottom of condenser electromagnetic induction coil, 8 is tundish, 9 are electromagnetism condenser of the present invention, and 10 is the extension at the mouth of a river 2, and 11 is crystallizer.
Among Fig. 2, electromagnetism condenser of the present invention as can be seen residing position in casting process, metal liquid flows out from tundish 8, enter semisolid casting device of the present invention-electromagnetism condenser 9, the brute force that is subjected to electromagnetism condenser 9 stirs and cooling, acquisition contains the semi-solid metal of some solid phase particles, and the extension 10 by the mouth of a river 2 enters crystallizer 11 then, and then realizes partly solidifying casting.
Realize the device of the inventive method, it is electromagnetism condenser 9, it is by on condenser 1 and the condenser periphery, following two groups of electromagnetic induction coils 6,7 form, condenser 1 is made up of the cooling jacket 3 of the mouth of a river 2 and 2 peripheries, the mouth of a river, the material at the mouth of a river 2 is refractory materials, cooling water enters cooling jacket 3 by import 4, and flow through from mouth of a river outer surface with fast speeds, with liquid metals cooling in the mouth of a river, discharge from exporting 5 then, the temperature of regulating pondage control liquid metals, electromagnetic induction coil 6 is positioned at the peripheral top of condenser, near the liquid metals porch, electromagnetic induction coil 7 is positioned at the peripheral bottom of condenser, they provide rotating excitation field, can apply powerful level to liquid metals in the condenser stirs, but the effect difference of the two coil, the effect of coil 6 is except stirring liquid metals, major function is to suppress liquid metals rising in the condenser 1, the effect of coil 7 is that liquid metals in the condenser 1 is carried out powerful the stirring, makes the dendrite fragmentation of solidifying, and forms globular crystal, acquisition contains the semi-solid metal of some solid phase particles, thereby realizes semisolid casting.
Claims (2)
1, a kind of device that can realize semisolid casting, here refer to molten steel cooling that flows into from tundish and the electromagnetism condenser that stirs by the electromagnetic force level, it is characterized in that: described electromagnetism condenser is by the condenser that makes the molten steel cooling, solidifies, and can in condenser, produce the electromagnetic induction coil composition that horizontally rotates magnetic field, described condenser is made up of the cooling jacket of the mouth of a river and periphery, the mouth of a river, described electromagnetic induction coil is formed by being distributed in the peripheral upper and lower two groups of different coils of condenser, and two groups of electromagnetic forces that coil produced are rightabout and distribute.
2, device according to claim 1, its feature in: the horizontal cross-section at the mouth of a river is a garden shape in the described condenser, and its material is a refractory material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN95107697A CN1049852C (en) | 1995-07-28 | 1995-07-28 | Device for realizing semisolid casting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN95107697A CN1049852C (en) | 1995-07-28 | 1995-07-28 | Device for realizing semisolid casting |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1119569A CN1119569A (en) | 1996-04-03 |
| CN1049852C true CN1049852C (en) | 2000-03-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN95107697A Expired - Fee Related CN1049852C (en) | 1995-07-28 | 1995-07-28 | Device for realizing semisolid casting |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1049852C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100337772C (en) * | 2004-11-10 | 2007-09-19 | 北京有色金属研究总院 | Composite electromagnetic stirring process of preparing semi-solid metal slurry continuously |
| CN100388993C (en) * | 2005-07-18 | 2008-05-21 | 刘国权 | Method of regulating molten steel overheat and water cooling sprue gate device |
| CN100357049C (en) * | 2005-09-29 | 2007-12-26 | 赫冀成 | Electromagnetic eddy flow downspout |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3941183A (en) * | 1973-10-19 | 1976-03-02 | Institut De Recherches De La Siderurgie Francaise (Irsid) | Liquid cooled electromagnetic continuous casting mold |
| SU549242A1 (en) * | 1973-05-15 | 1977-03-05 | Институт физики АН Латвийской ССР | Device for feeding metal into the mold of a continuous casting plant |
| SU597496A1 (en) * | 1976-11-29 | 1978-02-28 | Центральный научно-исследовательский институт черной металлургии им. И.П. Бардина | Device for cooling molten metal |
-
1995
- 1995-07-28 CN CN95107697A patent/CN1049852C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU549242A1 (en) * | 1973-05-15 | 1977-03-05 | Институт физики АН Латвийской ССР | Device for feeding metal into the mold of a continuous casting plant |
| US3941183A (en) * | 1973-10-19 | 1976-03-02 | Institut De Recherches De La Siderurgie Francaise (Irsid) | Liquid cooled electromagnetic continuous casting mold |
| SU597496A1 (en) * | 1976-11-29 | 1978-02-28 | Центральный научно-исследовательский институт черной металлургии им. И.П. Бардина | Device for cooling molten metal |
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| Publication number | Publication date |
|---|---|
| CN1119569A (en) | 1996-04-03 |
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