CN203610632U - Crescent face radial high-shearing electromagnetic stirring round blank continuous casting device - Google Patents
Crescent face radial high-shearing electromagnetic stirring round blank continuous casting device Download PDFInfo
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- CN203610632U CN203610632U CN201320833436.XU CN201320833436U CN203610632U CN 203610632 U CN203610632 U CN 203610632U CN 201320833436 U CN201320833436 U CN 201320833436U CN 203610632 U CN203610632 U CN 203610632U
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Abstract
The utility model relates to a crescent face radial high-shearing electromagnetic stirring round blank continuous casting device, and belongs to the field of metal material continuous casting. The crescent face radial high-shearing electromagnetic stirring round blank continuous casting device is composed of a flowing groove, a hot top, a core rod fixing support, a core rod, a crystallizer, a water sleeve, an induction coil and a bottom die. The flowing groove is formed in the top of the hot top, the hot top is arranged on the upper portion of the water sleeve, the core rod is arranged in the middle of the hot top and installed in the middle of the hot top through the core rod fixing support fixed at the bottom of the flowing groove, the core rod comprises a cooling unit, the water sleeve is arranged outside the crystallizer, the induction coil is located in the middle of the water sleeve outside the crystallizer and arranged in a slant mode, the generated radial electromagnetic force is parallel to the crescent face in direction, and the whole crescent face radial high-shearing electromagnetic stirring round blank continuous casting device is vertically arranged. Whole fluid forms circulation flow in the circular-seam type hot top and the crystallizer, the circulation flow is strengthened by the radial pushing force generated by the induction coil along the crescent face, radial high shearing of the crescent face is achieved, the casting blank radial temperature component difference is reduced, the isometric crystal rate is improved, and the primary phase morphology is improved.
Description
Technical field
The utility model relates to a kind of meniscus and radially shears by force electromagnetic agitation round billet continuous casting device, is mainly applicable to prepare high equiaxial crystal ratio circle base or semisolid circular blank, belongs to metal material continuous casting field.
Background technology
Conticaster is Metallurgical Industry continuous casting process capital equipment, and along with social development and scientific and technological progress, to Inner Quality of Billet, particularly casting blank solidification organizes equiaxial crystal ratio and morphology of primary phase to have higher requirement.Electromagnetic agitating technology is a kind of effective means that metal solidification process is controlled, and has a wide range of applications and deep industrial foundation.
The electromagnetic mixing apparatus of continuous casting cast steel mainly contains the polytypes such as revolving-field type, travelling-magnetic-field type and radial magnetic field type at present.Using maximum is first two.Revolving-field type electromagnetic mixing apparatus uses asynchronous motor three phase rotating field principle, so that not solidified metal bath rotates as three-phase asynchronous motor rotor, reaches the object of stirring, as US4016926.The stirring action that revolving-field type agitating device produces is circumferentially to circulate as main, and the radial flow of meniscus is secondary stream.The operation principle of travelling-magnetic-field type agitating device is also similar with induction conductivity, if stator core is cut and is launched into straight line, produces the travelling-magnetic-field changing by sinusoidal rule.In metal bath, produce an electromagnetic force consistent with travelling-magnetic-field direction, as US5219018.According to the layout difference of travelling-magnetic-field type agitating device, can produce axial circulation at metal bath and flow, circumferentially circulate and helical flow, the radial flow of meniscus is similarly secondary stream.Revolving-field type agitating device and travelling-magnetic-field type agitating device all need iron core, and radial magnetic field type agitating device belongs to coreless induction electromagnetic agitation, the motionless pulsation alternating magnetic field in this space can produce to repel and stir, mixing power is radial thrust, as the coreless induction furnace of US4229210 and employing single phase winding, in metal bath, produce standing wave, make its local strong convection that produces.The Another application of radial magnetic field type agitator is to lower between metal bath and mold to obtain contact, as US4723591 or replacement mold, realizes magnetic confinement and is shaped, as electromagnetic casting.US5135564 has also proposed a kind of circumferential weld structure, and this device is mainly the lower part of electromagnetic force in order to avoid producing because of kelvin effect, and strengthens peripheral flow because radial dimension diminishes.
Utility model content
The purpose of this utility model is to provide a kind of meniscus and radially shears by force electromagnetic agitation round billet continuous casting device.
A kind of meniscus is radially sheared by force electromagnetic agitation round billet continuous casting device, and this device is made up of chute, Re Ding, plug fixed support, plug, crystallizer, water jacket, induction coil and bed die; Described chute is arranged at the top on heat top, and described heat top is arranged at the top of water jacket; In the middle of described heat top, plug is set, described plug is arranged in the middle of heat top by being fixed on the plug fixed support of chute bottom, and described plug comprises cooling unit; Described water jacket is arranged at outside crystallizer, and described induction coil is positioned at the centre of the outside water jacket of crystallizer, described induction coil slant setting, and the radially electromagnetic push of generation is parallel with meniscus, and whole device is vertical.
Described plug and hot top makeup ring seam heat top, regulate circumferential weld width and pulping chamber height by changing plug size; Plug radius is less than or equal to 1/2 hot top radius, considers practical operation facility, and plug radius is greater than 10mm; Plug height is greater than 1/2 hot heights of roofs, is less than 1 times of hot heights of roofs.
Described plug and plug fixed support material are the low heat conductivity materials such as alumina silicate, refractory fibre; Described cooling unit is the cooling duct that is arranged at plug inside and is connected with cooling medium, and the material of cooling duct is the nonmagnetic substances such as austenitic stainless steel, titanium, molybdenum, cobalt, chromium, nickel and copper; Cooling medium is the non magnetic fluids such as air, water.
Induction coil slant setting, induction coil material is the contour electrical conductivity materials of copper, external coating one deck insulated paint, coil section can be ellipse or rectangle etc.; Coil angle of inclination is 0～90 degree; Frequency is 1～50Hz.
The external diameter of described bed die is identical with crystallizer internal diameter, can be placed in crystallizer for downward throwing.
Adopt the said equipment, carry out meniscus and radially shear by force the method for electromagnetic agitation round billet continuous casting, comprising: first bed die is placed in to crystallizer by stifled pulping chamber tight, then opens cooling water, metal bath is injected to chute; When melt through chute in the time that the hot jacking of circular seam type enters crystallizer, melt starts to solidify, and forms initial solidification shell, base shell solidification front form meniscus, meanwhile, draw bed die downwards, carry out process of billet withdrawal, base shell moves down, and progressive additive, finally complete and solidify, continuous casting is carried out continuously; After equipment is stable, open electromagnetic agitation, induction coil produces the radial thrust along meniscus, has realized radially and having sheared by force, and it is smooth that meniscus can become.
In casting process, alloy melt flows into fast crystallizer and forms high speed axial flow through circular seam type heat top from chute; Dispel the heat by plug, reduce the degree of superheat, once cooling by crystallizer; After casting process is stable, melt solidifying forward position forms meniscus; Induction coil loads two-phase low-frequency ac electric current, produces the electromagnetic push parallel with meniscus; Ingot casting is cooling by jacket water, carries out throwing by bed die, completes process of billet withdrawal by haulage gear.
After axial flow is at a high speed encountered meniscus, change radial flow into, the strengthening of the radial thrust along meniscus that the sensed coil of radial flow produces, has realized radially and having sheared by force; It is cooling that melt is solidified strand secondary.
When radial flow converges to centre, form recirculating zone, increased the heat convection of melt and plug, also increased the mixing of the cold and hot melt in below, circular seam type heat top simultaneously.Whole fluid has been realized circulation in circular seam type heat top and crystallizer.
The main technical principle that the utility model adopts: at casting apparatus Re Ding center, plug is set, heat top and plug form the hot roof construction of circular seam type.Circular seam type heat withstands on the axial flow that has improved melt in melt casting process because of constancy of volume principle, this axial flow changes radial flow into running into after meniscus, tilted-putted induction coil produces the electromagnetic force parallel with meniscus, strengthen the radial shear stream on meniscus, when converging to centre, radial flow forms recirculating zone, increase the heat convection of melt and plug, also increased the mixing of cold and hot melt simultaneously.Whole fluid has formed axisymmetric circular flow in circular seam type heat top and crystallizer.The strengthening of the radial thrust along meniscus that the sensed coil of this circular flow produces, has realized radially and having sheared by force.Promoted flowing of alloy melt and conducted heat by said method, the He Cheng branch, temperature field of melt is tending towards evenly, being conducive to obtain high-quality strand.
Compared with prior art, the utility model has the advantages that:
(1) the utility model becomes circular seam type heat top by plug heat top, has increased the axial flow in hot top, and cost is low, practicality simple to operate.
(2) induction coil is single phase winding, and fabrication and installation are simple, uses intermediate frequency power supply, without complicated power-supply device.
(3) meniscus is radially sheared by force, has alleviated strand radial temperature component difference, has increased equiaxial crystal ratio, has improved morphology of primary phase.
Accompanying drawing explanation
Fig. 1 is the schematic diagram that the utility model meniscus is radially sheared by force electromagnetic agitation round billet continuous casting device.
Fig. 2 is induction coil schematic diagram.
Fig. 3 is plug support schematic diagram.
Main Reference numeral:
1 plug fixed support 2 chutes
3 heat top 4 plugs
5 water jacket 6 induction coils
7 crystallizer 8 ingot castings
9 bed dies
The specific embodiment
As shown in Figure 1, meniscus of the present utility model is radially sheared by force electromagnetic agitation round billet continuous casting device, is made up of chute 2, heat top 3, plug fixed support 1, plug 4, crystallizer 7, water jacket 5, induction coil 6 and bed die 9; Chute 2 is arranged at the top on heat top 3, and heat top 3 is arranged at the top of water jacket 5; In the middle of heat top 3, plug 4 is set, plug 4 is arranged in the middle of heat top 3 by being fixed on the plug fixed support 1 of chute 2 bottoms, and plug 4 comprises cooling unit; Water jacket 5 is arranged at outside crystallizer 7, and induction coil 6 is positioned at the centre of the outside water jacket 5 of crystallizer 7, induction coil 6 slant settings, and the radially electromagnetic push of generation is parallel with meniscus, and whole device is vertical.
Be illustrated in figure 3 plug fixed support 1, plug 4 and plug fixed support 1 material are alumina silicate, refractory fibre low heat conductivity material; Cooling unit is the cooling duct that is arranged at plug 4 inside and is connected with cooling medium, and the material of cooling duct is the nonmagnetic substances such as austenitic stainless steel, titanium, molybdenum, cobalt, chromium, nickel and copper; Cooling medium is the non magnetic fluids such as air, water.
As shown in Figure 2, induction coil 6 slant settings, induction coil 6 materials are copper high conductivity material, external coating one deck insulated paint, coil section can be ellipse or rectangle etc.; Coil angle of inclination is 0～90 degree; Frequency is 1～50Hz.
The external diameter of bed die 9 is identical with crystallizer 8 internal diameters, can be placed in crystallizer 8 for downward throwing.
First on the suitable height of crystallizer 7, pulping chamber is sternly stifled with bed die 7, then open cooling water, metal bath injects chute 2 immediately.Because heat top 3 use insulation materials are made, therefore, melt can not solidify in heat top 3.In the time that melt enters crystallizer 7, melt starts to solidify, and forms initial solidification shell, meanwhile, draws bed die 9 downwards, carries out process of billet withdrawal.Along with the carrying out of process of billet withdrawal, base shell moves down, and progressive additive, finally completes and solidifies, and starts throwing by bed die 9, completes process of billet withdrawal by haulage gear, and continuous casting is constantly carried out.Along with the carrying out of process of billet withdrawal, heat top 3, plug 4 and bed die 9 temperature all can raise.In the time pulling out the blank of 1m left and right, equipment is basicly stable, opens electromagnetic agitation.Along with the carrying out of electromagnetic agitation process, meniscus can flatten smooth.Need in addition, according to cast melt temperature, to determine whether enable the cooling unit in plug 4, and use great cooling velocity.
In casting process, alloy melt flows into fast crystallizer 7 and forms high speed axial flow through circular seam type heat top from chute 2; Dispel the heat by plug 4, reduce the degree of superheat, once cooling by crystallizer 7; After casting process is stable, melt solidifying forward position forms meniscus; Induction coil 6 loads two-phase low-frequency ac electric current, produces the electromagnetic push parallel with meniscus; Ingot casting 8 is cooling by jacket water, carries out throwing by bed die 9, completes process of billet withdrawal by haulage gear.
After axial flow is at a high speed encountered meniscus, change radial flow into, the strengthening of the radial thrust along meniscus that the sensed coil 6 of radial flow produces, has realized radially and having sheared by force; It is cooling that melt is solidified strand secondary.When radial flow converges to centre, form recirculating zone, increased the heat convection of melt and plug 4, also increased the mixing of the circular seam type heat top 3 cold and hot melts in below simultaneously.Whole fluid has been realized circulation in 7 li, circular seam type heat top 3 and crystallizer.
Justify base as example to prepare diameter as the semisolid of 200mm below, further illustrate meniscus and radially shear by force electromagnetic agitation round billet continuous casting device and using method thereof.
Adopt meniscus radially to shear by force electromagnetic agitation round billet continuous casting device and prepare the semisolid circle base that diameter is 200mm, material is A357 alloy, require casting billet surface roughness to be less than 0.25, following process does not need peeling to process, in strand, non-dendrite ratio is greater than 70%, average grain size is less than 150 microns, as semi-solid die casting.
First, on the suitable height of crystallizer 7, pulping chamber is sternly stifled with bed die 9, then open cooling water, and preheating chute 2.Wherein hydraulic pressure is 0.05MPa, and chute 2 preheat temperatures are 400 ℃.Then A357 alloy melt qualified melting is continuously poured in chute 2 at 680 ℃, starts the speed throwing of haulage gear with 2.5mm/s simultaneously, in casting process, guarantee that melt is keeping constant altitude at chute 2.After 5 minutes, start agitator, stirring frequency is 5Hz, and electric current is 35A.In this implementation process, do not start the cooling unit in plug 4, do not have bleedout and tensile phenomenon to occur, blank surface is smooth, tissue be improved significantly, non-dendrite is graininess mutually, in strand, non-dendrite ratio is up to 90%, average grain size is less than 100 microns.In macrostructure, there is no columnar zone and gross segregation; After post bake, clamping property is good, easily cutting; Its tissue and performance meet semi-solid processing requirement completely.
When cast, metal bath flows into crystallizer 7 from chute 2 fast through circular seam type heat top 3, first dispels the heat by plug 4, reduces the degree of superheat, then once cooling by crystallizer 7 walls; After encountering meniscus, axially circulate and become radial flow, and it is cooling to be solidified strand secondary; When radial flow converges to centre, form recirculating zone, increased the heat convection of melt and plug 4, also increased the mixing of cold and hot melt simultaneously.Whole fluid has formed circular flow in 7 li, circular seam type heat top 3 and crystallizer.The strengthening of the radial thrust along meniscus that the sensed coil of this circular flow produces, has realized radially and having sheared by force.Strand 8 is cooling by jacket water, starts throwing by bed die 9, completes process of billet withdrawal by haulage gear.
Claims (5)
1. meniscus is radially sheared by force an electromagnetic agitation round billet continuous casting device, it is characterized in that: be made up of chute, Re Ding, plug fixed support, plug, crystallizer, water jacket, induction coil and bed die; Described chute is arranged at the top on heat top, and described heat top is arranged at the top of water jacket; In the middle of described heat top, plug is set, described plug is arranged in the middle of heat top by being fixed on the plug fixed support of chute bottom, and described plug comprises cooling unit; Described water jacket is arranged at outside crystallizer, and described induction coil is positioned at the centre of the outside water jacket of crystallizer, described induction coil slant setting, and the radially electromagnetic push of generation is parallel with meniscus, and whole device is vertical.
2. meniscus according to claim 1 is radially sheared by force electromagnetic agitation round billet continuous casting device, it is characterized in that: described plug and hot top makeup ring seam heat top, described plug radius is less than or equal to 1/2 hot top radius, and described plug height is greater than 1/2 hot heights of roofs, is less than hot heights of roofs.
3. meniscus according to claim 1 is radially sheared by force electromagnetic agitation round billet continuous casting device, it is characterized in that: described plug and plug fixed support material are alumina silicate or refractory fibre.
4. meniscus according to claim 3 is radially sheared by force electromagnetic agitation round billet continuous casting device, it is characterized in that: described cooling unit is the cooling duct that is arranged at plug inside and is connected with cooling medium, and the material of cooling duct is austenitic stainless steel, titanium, molybdenum, cobalt, chromium, nickel or copper; Cooling medium is air or water.
5. meniscus according to claim 1 is radially sheared by force electromagnetic agitation round billet continuous casting device, it is characterized in that: described induction coil external coating one deck insulated paint, coil section is ellipse or rectangle, material is copper, coil angle of inclination is 0～90 degree, and frequency is 1～50Hz.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320833436.XU CN203610632U (en) | 2013-12-17 | 2013-12-17 | Crescent face radial high-shearing electromagnetic stirring round blank continuous casting device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320833436.XU CN203610632U (en) | 2013-12-17 | 2013-12-17 | Crescent face radial high-shearing electromagnetic stirring round blank continuous casting device |
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| Publication Number | Publication Date |
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| CN203610632U true CN203610632U (en) | 2014-05-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320833436.XU Withdrawn - After Issue CN203610632U (en) | 2013-12-17 | 2013-12-17 | Crescent face radial high-shearing electromagnetic stirring round blank continuous casting device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104707960A (en) * | 2013-12-17 | 2015-06-17 | 北京有色金属研究总院 | Meniscus radial strong shear electromagnetic stirring round billet continuous casting device and method |
| CN111451465A (en) * | 2020-04-07 | 2020-07-28 | 江苏华企铝业科技股份有限公司 | Equipment and process for producing large-size aluminum alloy round ingot |
-
2013
- 2013-12-17 CN CN201320833436.XU patent/CN203610632U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104707960A (en) * | 2013-12-17 | 2015-06-17 | 北京有色金属研究总院 | Meniscus radial strong shear electromagnetic stirring round billet continuous casting device and method |
| CN104707960B (en) * | 2013-12-17 | 2017-03-01 | 北京有色金属研究总院 | A kind of meniscus radial direction Strong shear electromagnetic agitation round billet continuous casting apparatus and method |
| CN111451465A (en) * | 2020-04-07 | 2020-07-28 | 江苏华企铝业科技股份有限公司 | Equipment and process for producing large-size aluminum alloy round ingot |
| CN111451465B (en) * | 2020-04-07 | 2021-10-08 | 江苏华企铝业科技股份有限公司 | Equipment and process for producing large-size aluminum alloy round ingot |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140528 Effective date of abandoning: 20171114 |
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| AV01 | Patent right actively abandoned |