CN206869042U - One kind cooling mould - Google Patents
One kind cooling mould Download PDFInfo
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- CN206869042U CN206869042U CN201720423466.1U CN201720423466U CN206869042U CN 206869042 U CN206869042 U CN 206869042U CN 201720423466 U CN201720423466 U CN 201720423466U CN 206869042 U CN206869042 U CN 206869042U
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Abstract
The utility model proposes one kind to cool down mould, and it includes pouring into a mould chassis and condenser wall, and condenser wall includes at least two cooling layers vertically set gradually；Cooling mould also includes being arranged at least two pairs of electromagnetic induction components on the outside of condenser wall, and each pair electromagnetic induction component is symmetricly set on the both sides of casting cavity, and few a pair of electromagnetic induction components are respectively provided on each cooling layer；Each electromagnetic induction component includes at least two pairs coils in condenser wall that can be slidably connected, and two coils in each pair coil are parallel and are oppositely arranged；In each electromagnetic induction component, at least one pair of coil is vertically arranged, and at least one pair of previous level is set, and horizontally disposed each coil is located between the center line for each coil being vertically arranged；The both ends head and the tail of each coil are relative or connected successively, are respectively enclosed to semiclosed or closing rectangle.The utility model can be stirred to molten steel respectively from horizontally and vertically direction, improve ingot quality.
Description
Technical field
The technical field of metallurgical casting is the utility model is related to, more particularly to a kind of cooling mould.
Background technology
Special heavy plate is usually used in atomic power station shell, skyscraper base, offshore platform, high-pressure bottle, aviation
Mother ship carrier armour plate, weight chemical reaction tower, water power, thermoelectricity, Wind turbines base etc., belong to high-performance, high cleanliness, high added value
Product, wherein most require ultrasonic examination, and part also requires Z-direction performance.At present, mainly have for special heavy plate blank following
Several sources：
1st, traditional cast iron ingot mould, when producing steel ingot, molten steel injects cast iron mold, and steel ingot is cold under natural environmental condition
But, intensity of cooling is relatively low, and setting rate is slower, and ingot solidification produces air gap with ingot mould, and steel ingot heat transfer condition declines, and steel ingot is present
Reverse V-shaped segregation, center segregation and loose, or even central pipe is produced, the special heavy plate of steel ingot rolling can not meet ultrasonic examination
It is required that.
2nd, directional solidification technique, cooled down using the pressure of bottom water-cooled chassis, add the intensity of cooling of Above The Ingot Bottom, but
The soluterich layer of larger area be present at the top of steel ingot, while a certain amount of insulation slag blanket be present, it is necessary to manually or mechanically clear up,
Substantial amounts of artificial and material is expended, is difficult to be widely popularized at present.
3rd, with reference to directional solidification and the water-cooled die casting technology of continuous cast mold, the intensity of cooling of chassis and side wall is enhanced,
But in the process of setting of ultra-large type steel ingot, being cooled down in spite of the forced water in the external world, but because steel ingot tonnage is larger, steel ingot coagulates
Gu the time is longer, steel ingot center segregation is still more serious.
4th, the continuous casting billet of traditional Plate production production, currently without the blank more than 600 millimeters thicks, according to three multiplication of voltages
Contracting ratio, it can not still meet more than 200 millimeters of special heavy plate demand at present.
In the prior art, when casting special heavy plate steel ingot, steel ingot easily produces certain mass defect and segregation, in order to subtract
Light segregation, loose and shrinkage cavity, generally apply electromagnetic agitation on the outside of steel ingot die, improve ingot quality, but existing electromagnetism stirs
Mix device and may be only available for more light-gauge cylindric steel ingot, the diversified demand of shape of ingots can not be met.Induction coil leads to
Electricity produces certain electromagnetic force, but electromagnetic force can only be acted in limited region, and flowing is water caused by the molten steel stirred
Square to, it is impossible to produce the stirring of vertical direction, molten steel can not realize the stream in larger scope in casting cavity top and bottom
Dynamic, stirring region is smaller.
In addition, the structural strength of existing cooling mould is relatively low, local deformation and overheat are easily produced, bleed-out, leakage occurs
The risk of water etc., while cooling capacity is poor, and hot-spot easily occurs, and causes the security incidents such as burn-through.
Utility model content
To solve the undesirable technical problem of special heavy plate ingot quality, the utility model proposes one kind to cool down mould, makes steel
Liquid solidifies under magnetic field condition, and molten steel can be stirred respectively from horizontally and vertically direction, obtains preferable equiaxial crystal ratio,
Improve ingot quality.
The utility model proposes one kind to cool down mould, and the cooling mould includes cast chassis and is sealedly connected on described pour
Note chassis on condenser wall, the condenser wall with it is described cast chassis enclose to be formed with upper shed be used for accommodate steel to be cooled
The casting cavity of liquid, the condenser wall include at least two cooling layers vertically set gradually；
The cooling mould also includes being arranged at least two pairs of electromagnetic induction components on the outside of the condenser wall, described in each pair
Electromagnetic induction component is symmetricly set on the both sides of the casting cavity, and is respectively provided on each cooling layer less described in a pair
Electromagnetic induction component；Each electromagnetic induction component includes at least two pairs of coils, two lines in coil described in each pair
Circle is parallel and is oppositely arranged, and each coil can be slidably connected in the condenser wall respectively；
In each electromagnetic induction component, wherein at least a pair coils are vertically arranged, at least one pair of described coil water
Flat to set, horizontally disposed each coil is located between the center line for each coil being vertically arranged；Each coil
Both ends head and the tail are relative successively, surround semi-enclosed rectangle, or the both ends head and the tail of each coil are sequentially connected, and surround closing
Rectangle.
Further, the condenser wall includes four pieces of side walls, and each side wall encloses the casting cavity, each side wall
Upper difference vertically sets at least two electromagnetic induction components；
In each electromagnetic induction component, each coil being vertically arranged is respectively close to two of the side wall where it
Lateral edges.
Further, each side wall includes the working plate and backboard set gradually from the inside to the outside, each work respectively
Make plate and each backboard is each made of a metal, inner side and the chassis of each working plate enclose the casting cavity；
Each working plate includes at least two sections of working plate subregions for being sequentially connected from bottom to up, in each working plate
The thermal conductivity of each working plate subregion be sequentially reduced from bottom to up.
Further, the thickness of the working plate gradually increases from bottom to up.
Further, the cooling mould also includes being arranged at least two pairs of water supply mechanisms on the outside of the condenser wall, respectively
The cooling layer is respectively provided to few a pair of water supply mechanisms, and water supply mechanism is symmetricly set on the casting cavity described in each pair
Both sides；
Each water supply mechanism includes inlet water tank, water tank and the connection inlet water tank and the water tank respectively
Cooling duct；In each water supply mechanism, the inlet water tank is respectively positioned on the lower section of the water tank.
Further, each electromagnetic induction component includes four coils, in each electromagnetic induction component, its
In two coils be vertically arranged, described in another two previous level set；
Each coil is made by hollow pipe, and each electromagnetic induction component also includes corresponding with each coil
Four cooling water pipes set, each cooling water pipe connect with the corresponding hollow pipe respectively, and respectively by the cold of the external world
But the hollow pipe corresponding to water circulation input.
Further, in each electromagnetic induction component, the horizontal positioned and above coil is placed in its institute
The cooling layer the water tank in, the cooling that the horizontal positioned and underlying coil is placed in where it
In the inlet water tank of layer.
Further, each electromagnetic induction component also includes corresponding four driving machines set with each coil
Structure, each drive mechanism is connected to the outside of the condenser wall, and the coil corresponding to driving moves up and down respectively
Or move horizontally.
Further, iron core is placed respectively in each coil.
Further, each coil is made of copper.
The utility model is compared to the beneficial effect of prior art：Cooling mould of the present utility model, coil have
Function of electromagnetic induction, be advantageous to improve liquid phase part molten steel flow and heat transfer condition, improve steel ingot internal soundness.Multizone is distributed
Coil can both realize the electromagnetic stirring function of regional area, the enough electromagnetic induction coils by controlling multiple regions of and can
The sense of current and size of current, the repeat magnetic field of large area is realized, make flowing of the molten steel in big region, promote molten steel
Temperature and composition it is uniform, while thick column crystal is crushed, helps to form tiny isometric crystalline region, improve steel
Isotropism.
Each coil of each electromagnetic induction component is respectively enclosed to rectangular area, and magnetic field caused by each electromagnetic induction component is also approximate
For rectangle, molten steel can form circulation with short transverse in the horizontal direction.By changing the sense of current being passed through in each coil, adjust
Magnetic direction caused by whole each coil, the magnetic direction of each coil in each electromagnetic induction component is set to carry out side clockwise, counterclockwise
To conversion, molten steel also can form more preferable stirring to molten steel in the flowing of short transverse by the disturbance of magnetic field of different directions
Control, makes the molten steel temperature in casting cavity uniform, the ingot composition of formation is uniform.
Using cooling mould of the present utility model, steel ingot is set to be solidified under controllable magnetic field condition, rational setting stirring
Technique, promote the Dispersed precipitate of high concentration segregation element formed in During Ingot Solidification, reduce the segregation inside steel ingot and dredge
Pine, the shrinkage cavity defect that solidification is formed is eliminated, meets the uniformity of steel ingot interior tissue performance, obtains preferable steel ingot equiax crystal
Rate, so as to produce the special heavy plate blank of high quality.
Brief description of the drawings
Fig. 1 is the schematic front view of cooling mould of the present utility model；
Fig. 2 is the schematic front view of the embodiment one of the side wall of cooling mould of the present utility model；
Fig. 3 is Fig. 2 A-A schematic cross-section；
Fig. 4 is Fig. 2 B-B schematic cross-section；
Fig. 5 is the schematic diagram of the drive mechanism of the present utility model for cooling down mould and the annexation of coil；
Fig. 6 is the schematic front view of the embodiment two of the side wall of cooling mould of the present utility model；
Fig. 7 is the schematic top plan view of the embodiment two of the side wall of cooling mould of the present utility model；
Fig. 8 is the schematic front view of the embodiment three of the side wall of cooling mould of the present utility model；
Fig. 9 is the schematic top plan view of the embodiment three of the side wall of cooling mould of the present utility model.
Reference：
10- pours into a mould chassis；
20- condenser walls；22- side walls；
The horizontally disposed coils of 32-；The coil that 34- is vertically arranged；
42- inlet water tanks；44- water tanks；
50- drive mechanisms；
52- supports；54- horizontal push；The vertical push rods of 56-；58- connectors.
Embodiment
Below in conjunction with accompanying drawing, the technical characteristic above-mentioned to the utility model and advantage are clearly and completely described, and show
So, described embodiment is only section Example of the present utility model, rather than whole embodiments.
Refer to shown in Fig. 1, the utility model proposes one kind to cool down mould, and cooling mould includes cast chassis 10 and condensation
Wall 20, condenser wall 20 are sealedly connected on cast chassis 10, and enclose to form the casting cavity with upper shed with cast chassis 10,
Casting cavity is used to accommodate molten steel to be cooled, and condenser wall 20 includes at least two cooling layers vertically set gradually.
Referring to shown in Fig. 2, cooling mould also includes at least two pairs of electromagnetic induction components for being arranged on the outside of condenser wall 20,
Each pair electromagnetic induction component is symmetricly set on the both sides of casting cavity, and few a pair of electromagnetic induction are respectively provided on each cooling layer
Component；Each electromagnetic induction component includes at least two pairs of coils, and two coils in each pair coil are parallel and are oppositely arranged, respectively
Coil can be slidably connected in condenser wall 20 respectively.
In each electromagnetic induction component, wherein at least a pair of coils are vertically arranged, and at least one pair of previous level is set, and level is set
Each coil (i.e. horizontally disposed coil 32) put is located at the center for each coil (coil 34 being vertically arranged) being vertically arranged
Between line；The both ends head and the tail of each coil are relative successively, surround semi-enclosed rectangle, or the both ends head and the tail phase successively of each coil
Even, the rectangle of closing is surrounded.
That is, in each electromagnetic induction component, horizontally disposed coil 32 is up in line respectively with lower section, erects
The coil 34 directly set is in line respectively in left side and right side；The center line of horizontally disposed coil 32 turns into two of rectangle
Horizontal relative edge, the center line for the coil 34 being vertically arranged turn into two vertical relative edges of rectangle.More preferably, each electromagnetic induction
Component includes four coils, and in each electromagnetic induction component, two of which coil is vertically arranged, and another two previous level is set,
The magnetic field so formed is relatively easy, is not easy to interfere between each magnetic field.
In embodiment one as shown in Figure 2, cooling mould includes four cooling layers.Embodiment two as shown in Figure 6 and Fig. 8
In shown embodiment three, cooling mould includes three cooling layers.The material of condenser wall 20 must be magnetic-permeable material, while not
It can be the material that can be magnetized.
Cooling mould of the present utility model, coil have function of electromagnetic induction, are advantageous to improve liquid phase part molten steel flow
And heat transfer condition, improve steel ingot internal soundness.The coil of multizone distribution can both realize the electromagnetic stirring function of regional area,
And can is enough by the sense of current and size of current of the electromagnetic induction coil for controlling multiple regions, realizes that the circulation of large area is handed over
Varying magnetic field, makes flowing of the molten steel in big region, promotes the uniform of molten steel temperature and composition, while thick column crystal is carried out
It is broken, help to form tiny isometric crystalline region, improve the isotropism of steel.
Cooling mould of the present utility model, the temperature of water mold can be reduced, strengthen the intensity of cooling of steel ingot, accelerated
The radiating of ingot solidification, the setting rate of steel ingot is improved, shorten the ingot solidification time, refine steel ingot internal grain, improve steel ingot
Equiax crystal region, improve ingot quality.
In cooling mould of the present utility model, pour into a mould chassis 10 and condenser wall 20 is arranged on the center of cooling mould, cast
Chassis 10 and condenser wall 20 form water mold.Electromagnetic induction component is arranged on the outside of water mold, and coil can pass through
It is bolted on water mold.It is of the present utility model cooling mould also include by water mold fix U-shaped framework and
Retaining mechanism.
In cooling mould of the present utility model, each coil of each electromagnetic induction component is respectively enclosed to rectangular area, each electromagnetism
Magnetic field caused by inductive component is also approximately at rectangle, and molten steel can form circulation with short transverse in the horizontal direction.Pass through change
The sense of current being passed through in each coil, adjust each coil caused by magnetic direction, make the magnetic of each coil in each electromagnetic induction component
Field direction carries out clockwise, anticlockwise conversion, and molten steel also can be by the magnetic field of different directions in the flowing of short transverse
Disturbance, forms more preferable mixing control to molten steel, makes the molten steel temperature in casting cavity uniform, the ingot composition of formation is uniform.
Traditional ingot mould, which produces, uses natural cooling, and temperature raises after the certain heat of steel ingot die own absorption, ingot mould
Radiated under natural environmental condition relatively slow, steel ingot cooling velocity is slower, and the ingot solidification time is longer, easily occurs inside steel ingot
Loose, shrinkage cavity, steel ingot internal segregation are more serious.Cooling mould of the present utility model installs electromagnetism additional in the outside of water mold
Inductive component, it is stirred using electromagnetic action, strengthens the intensity of cooling of steel ingot die, improves steel ingot cooling velocity.
Further, condenser wall 20 includes four pieces of side walls 22, and each side wall 22 encloses casting cavity, as shown in Fig. 2 each side wall
At least two electromagnetic induction components are vertically set respectively on 22；In each electromagnetic induction component, each coil 34 being vertically arranged divides
The both sides of the edge of side wall 22 not where it.
More preferably, chassis 10 and four pieces of side walls 22 are poured into a mould to form by the copper alloy of good heat conductivity, are assembled by bolt
Into after water mold, pour into a mould chassis 10 and four pieces of side walls 22 has independent water inlet and delivery port respectively, each water inlet
Mouth is provided with flow control valve, thermometer and flowmeter, and the accurate flow and temperature for measuring cooling water, intake-outlet is respectively with entering
Outlet pipe connects one to one.
Cooling mould of the present utility model according to being actually needed, can adjust the size and specification of casting cavity, meet different
The ingot weight demand of section, different size and different height, realizes that one set of die meets the production needs of more specifications, reduces steel plant
For purchasing the expense of a large amount of steel ingot dies, production cost is reduced.Embodiment one as shown in Figure 4 and the embodiment shown in Fig. 9
In three, cooling mould is applied to square ingot, rectangular ingot, cast slab.In embodiment two as shown in Figure 7, cooling mould is applied to
I-shaped steel ingot or H profile steel ingot.
The circular in cross-section of condenser wall 20 can also be made, that is to say, that cooling mould of the present utility model is applied to circle
Steel ingot, few a pair of electromagnetic induction components are respectively provided on each cooling layer, and each pair electromagnetic induction component is symmetricly set on casting
The both sides of chamber.
Further, as shown in figure 1, each side wall 22 includes the working plate and backboard set gradually from the inside to the outside respectively,
Each working plate and each backboard are each made of a metal, and inner side and the chassis of each working plate enclose casting cavity.Each working plate includes
At least two sections of working plate subregions being sequentially connected from bottom to up, the thermal conductivity of each working plate subregion in each working plate is from bottom to up
It is sequentially reduced.
More preferably, the material of working plate is fine copper, copper alloy or mild steel.To working plate using suitable surface treatment skill
Art, plating one or more material, to obtain the surface with property, ensureing that it is little that its thermal conductivity is influenceed by coating
In the case of, obtain and matrix is firmly combined with, wearability is good, the various coating of corrosion and heat resistant by force, to improve the superficiality of copper coin
, it can increase the service life, improve ingot quality, so as to reduce ton steel cost.The coating species on surface has plating Cr, plating Ni-Cr, plating
Ni-Fe, plating Ni-W-P, plating Ni-Co, plating Co-Ni, Ni-Cr alloy sprayed coating, ceramic coating etc..
Each working plate subregion is welded by the different different materials of thermal conductivity respectively, as fine copper, copper alloy, mild steel,
Stainless steel, heat-resisting alloy etc., and thermal conductivity diminishes from the bottom to top.In embodiment one, embodiment two and embodiment three, from it is lower to
On be followed successively by fine copper, ingot iron, mild steel, stainless steel.Each backboard is made of Steel material.
Further, the thickness of working plate gradually increases from bottom to up, profile thin upper shape thickness under being in.
Further, refer to shown in Fig. 2, Fig. 3 and Fig. 4, cooling mould also includes being arranged on the outside of condenser wall 20 extremely
Few two pairs of water supply mechanisms, each cooling layer are respectively provided to few a pair of water supply mechanisms, and each pair water supply mechanism is symmetricly set on casting
The both sides of chamber.Each water supply mechanism includes the cooling of inlet water tank 42, water tank 44 and connection inlet water tank 42 and water tank 44 respectively
Passage；In each water supply mechanism, inlet water tank 42 is respectively positioned on the lower section of water tank 44.
Further, in embodiment one, embodiment two and embodiment three, each electromagnetic induction component includes two pairs of coils,
That is four coils.In each electromagnetic induction component, two of which coil is vertically arranged, and another two previous level is set.Each coil is equal
It is made up of hollow pipe, each electromagnetic induction component also includes corresponding four cooling water pipes set, each cooling water with each coil
Pipe connects with corresponding hollow pipe respectively, and respectively by hollow pipe corresponding to the cooling water circulation input in the external world.
Further, in each electromagnetic induction component, cooling that horizontal positioned and above coil is placed in where it
In the water tank 44 of layer, horizontal positioned and underlying coil is placed in the inlet water tank 42 of the cooling layer where it.
More preferably, the mounting means of each coil has：Built-in type, packaged type and fitted outside.
Built-in type：Coil is arranged in inlet water tank 42 or water tank 44, is directly connected with the cooling water of water mold altogether
With.Agitator most presses close to cast steel ingot, and cooling effectiveness is high.
Packaged type：Coil is arranged on the sealing space in inlet water tank 42 or water tank 44, the cooling water with water mold
Separate, water cooling, and closed cycle are cooled down using independent cooling.
Fitted outside：Coil is arranged on the outside of inlet water tank 42 or water tank 44, and itself encapsulation is integral, is fixed on condenser wall
On 20, using independent cooling water cooling, and closed cycle.
Electromagnetic induction component need not be equipped with pressure cooling system, and itself cooling just disclosure satisfy that requirement, realize stable operation.
In actual production process, using different coil mount schemes, can also it be may be selected according to the dimensions and cross dimensions of steel ingot
With the inductive coil assembly for forcing cooling, can also use without the inductive coil assembly for forcing cooling.
Further, each electromagnetic induction component also includes corresponding four drive mechanisms 50 set with each coil, respectively
Drive mechanism 50 is connected to the outside of condenser wall 20, and coil corresponding to driving is moved up and down or moved horizontally respectively.Please
As shown in fig.5, each drive mechanism 50 includes support 52, horizontal push 54, vertical push rod 56 and connector 58.Support 52 is solid
The outside of condenser wall 20 is scheduled on, connector 58 can vertically be slidably connected and set one on the outside of support 52, connector 58
Individual horizontal through hole and a vertical through hole, horizontal push 54 slidably can be located in horizontal through hole, one end of horizontal push 54
It is fixed on coil, vertical push rod 56 is fixed and is located in vertical through hole.
In cooling mould of the present utility model, by taking a coil being vertically arranged 34 as an example, two horizontal push 54 are set,
One end of horizontal push 54 is fixed on the coil 34 that this is vertically arranged.When horizontal push 54 slides in the horizontal direction, promote
The coil 34 being vertically arranged moves left and right.When vertical push rod 56 vertically slides, with follower link 58 in support 52
Outside is vertically slided, and connector 58 drives horizontal push 54 vertically to slide, so as to drive the coil 34 being vertically arranged synchronous
Move up and down.
Drive mechanism 50 also includes two drivers, and a driver drives horizontal push 54, the driving of another driver
Vertical push rod 56.Driver is leading screw, hydraulic jack or pinion and rack., can be according to solidification in During Ingot Solidification
Need, drive mechanism 50 carries out the elevating control of short transverse to coil, and the translation that horizontal direction can be also carried out to coil controls.
More preferably, a plurality of groove, groove arrangement are opened up with vertical direction in the horizontal direction respectively in the outside of condenser wall 20
In netted, coil can the horizontal or vertical sliding in each groove.Before ingot steel casting, the position of each coil and fixed locking are adjusted.
In coil moving process, it is allowed to the gap within 0.5 millimeter, after the completion of mobile, coil between condenser wall 20 and coil be present
It is brought into close contact with condenser wall 20.
More preferably, coil can move in the certain limit on backboard, can be applied to different section and the steel ingot of specification
Casting, there is good versatility.The distance that coil moves up and down is by inlet water tank 42, water tank 44 in corresponding cooling layer
Between spacing limitation, can only be moved between inlet water tank 42 and water tank 44, displacement is smaller.Lateral distance phase
To larger.
Further, iron core is placed respectively in each coil, improve magnetic field intensity.Meanwhile the power of each coil can be adjusted
Section, the sense of current can enter line translation, to control magnetic direction.
Further, each coil is made of copper.More preferably, the section of coil is rectangle, circle or other shapes, and coil is in
Helical form.
Cooling mould of the present utility model, make to be uniformly distributed the multipair electromagnetism sense set along short transverse in four side walls 22
Component is answered, forms magnetic confining field, horizontal agitation is carried out to molten steel.Each cooling layer that each side wall 22 can also be used forms independence
Electromagnetic agitation region, realize region stirring action.Also can be according to ingot solidification process, when the molten steel of first cooling layer in bottom
After the completion of solidification, close the electromagnetic induction component of bottom first layer, each layer electromagnetic induction component in top continue successively to top not
The molten steel of solidification is stirred.
The coil of the edge of each side wall 22 can also be used, form the zone of action and cover the big of whole side wall 22
Regional magnetic field, the stirring in big region is carried out to molten steel.The coil being vertically arranged of close left and right sides in each layer of field region
34 form the magnetic field of alternation, and local stirring is carried out to the molten steel of edge.
The coil 34 being vertically arranged is formed a line, and forms independent electromagnetic induction magnetic field, and the jet for pouring into a mould molten steel is produced
Electromagnetic braking effect, the speed of the molten steel jet of runner brick outflow is reduced, prevents molten steel from producing larger jet opening the stage of pouring,
Molten steel splash is prevented, avoids causing local splash to solidify the inwall of condenser wall 20, causes surface of steel ingot to scab, moreover it is possible to prevent
The big ups and downs of molten steel liquid level, covering slag is involved in molten steel and be internally formed dreg defect.
In addition, electromagnetic mixing apparatus uses the form of multiple coils, it is easy to overhaul and changes, for what can not be worked individually
Coil can carry out integral replacing, reduce cost, improve service efficiency and service life.
Cooling mould of the present utility model, the method for cooling down steel ingot comprise the following steps：
Step S10, molten steel is injected into casting cavity from bottom to up by pouring into a mould chassis 10, make in condenser wall 20 from it is lower to
On first cooling layer in each coil be powered；
Step S20, continue to inject molten steel, as molten steel liquid level reaches each cooling layer from bottom to up, make each cooling successively
Coil electricity in layer；
Step S30, after the completion of solidification, coil is set all to power off.
The method of cooling steel ingot of the present utility model, makes steel ingot be solidified under controllable magnetic field condition, and rational setting is stirred
Technique is mixed, the thick column crystal formed in the During Ingot Solidification that fractures, forms tiny equiax crystal, promotes During Ingot Solidification
The Dispersed precipitate of the high concentration segregation element of middle formation, reduce the segregation inside steel ingot and loose, the shrinkage cavity that elimination solidification is formed
Defect, meet the uniformity of steel ingot interior tissue performance, obtain preferable steel ingot equiaxial crystal ratio, it is thick so as to produce the spy of high quality
Plate blank material.
Also comprise the following steps before step S10：Condenser wall 20 is placed on cast chassis 10, passes through clamping device
Four pieces of side walls 22 are assembled into casting cavity, while logical cooling water, pours into a mould and is provided with groove, the laid inside of groove in advance on chassis 10
Runner brick, gate spool is placed in the relevant position on cast chassis 10, completes the assembling of water mold.
Before cast starts, the information such as the temperature of the molten steel of real-time display, poring rate in ingot steel casting software systems, simultaneously
Monitor the temperature of the condenser wall 20 of the flow of cooling water, temperature and water mold.Melted molten steel is poured into casting cavity
In, prepare cast.
Further, the current strength being passed through in coil is more than or equal to 10 peaces, and less than or equal to 500 peaces.More preferably,
2Hz~50Hz Low-frequency alternating currents, mixing speed 0.1m/s~5m/s are passed in coil.The electricity of the coil of each cooling layer
The size and Orientation of stream can independent control, the adjustment of size of current can be realized, can also realize the conversion of the sense of current, ensure
The intensity for the induced field that each coil is formed and direction are adjustable.
Further, step S20 is to continue to inject molten steel, as molten steel liquid level reaches each cooling layer from bottom to up, by
Layer makes each coil electricity in each cooling layer, until molten steel liquid level reaches the cooling layer of the top.
That is, by taking embodiment one, embodiment two and embodiment three as an example, before starting cast, open close to bottom
The electromagnetic induction component of arrangement in first cooling layer, local magnetic field is formed using four coils up and down, when molten steel passes through
When steel outlet hole is entered in casting cavity, molten steel forms the induced field of zonule in casting cavity, and the induction effect of coil can suppress
Into the height of jet of the molten steel in casting cavity, the big ups and downs of molten steel liquid level are avoided, avoid being placed on the covering slag on liquid level
It is involved in the inside of molten steel.
With the rising of molten steel liquid level, the static pressure of molten steel cast reduces, and the effluxvelocity of molten steel reduces in steel outlet hole, steel
The flowing of liquid weakens, and adjusts the sense of current, realizes commutation agitating function, makes the temperature of molten steel uniform.
Molten steel liquid level persistently rises, and the control molten steel liquid level rate of climb is in 100~200mm/min, holding molten steel liquid
Face it is steady, avoid the occurrence of larger liquid fluctuating and cause slag.When molten steel liquid level reaches second cooling layer from bottom to up, open
The electromagnetic induction component of the second layer is opened, the coil of the second layer forms induced field to the molten steel in casting cavity, molten steel is stirred
Mix.
When molten steel liquid level is increased to the 3rd cooling layer from bottom to up, the electromagnetic induction component of third layer, third layer are opened
Coil in casting cavity molten steel formed induced field, molten steel is stirred.Until molten steel liquid level is increased to the top
During the coil of cooling layer, the electromagnetic induction component of the superiors is opened, each coil of the superiors forms sense to the molten steel in casting cavity
Magnetic field is answered, molten steel is stirred.
After molten steel cast terminates, treat that the chill solidification on molten steel surface is completed, when initially forming columnar zone, reduce cooling
The flow of water, weaken the intensity of cooling of cooling mould, avoid the fast-growth of excessive column crystal.
By taking embodiment two and embodiment three as an example, cooling mould includes three cooling layers.The coil of each cooling layer leads to simultaneously
Electricity, a big closed area is formed, larger electromagnetic induction magnetic field is internally formed in steel ingot die, to large range of steel
Liquid is stirred, and stirring clockwise, counterclockwise can be achieved.Magnetic field agitation-stopping clockwise being used in whipping process
The periodic job mode of stirring-magnetic field agitation counterclockwise-stopping stirring-magnetic field agitation clockwise, realize the big model of molten steel
Stirring is enclosed, the time of different agitation phases can also be set and stop the time of stirring.
More preferably, cooling mould of the present utility model and the method for cooling down steel ingot, the line of each cooling layer can be directed to respectively
Circle carries out independent electromagnetic induction control, realizes independent electromagnetic stirring force, at the same the direction in magnetic field can with it is underlying
Magnetic direction caused by the electromagnetic induction component of cooling layer is identical, may be reversed.The utility model can cast out internal group
Knit it is fine and close, without it is loose, without reverse V-shaped segregation, be mingled with less, disclosure satisfy that the steel ingot of special heavy plate demand.
Or step S20 is to continue to inject molten steel, as molten steel liquid level reaches each cooling layer from bottom to up, is successively made
Each coil electricity in cooling layer where molten steel liquid level, and make each in the cooling layer below the cooling layer where molten steel liquid level
Coil blackout, until molten steel liquid level reaches the cooling layer of the top.
As a kind of enforceable mode, step S20 comprises the following steps：
Step S21, continue to inject molten steel, as molten steel liquid level reaches each cooling layer from bottom to up, successively make molten steel liquid
Coil blackout horizontal positioned and above in adjacent cooling layer below cooling layer where face, it is cold where molten steel liquid level
But horizontal positioned in layer and underlying coil electricity；
Step S22, after being kept for predetermined time, horizontal positioned in the cooling layer where molten steel liquid level and underlying line
Circle powers off, other coil electricities in the cooling layer where molten steel liquid level.
By taking embodiment two and embodiment three as an example, cooling mould includes three cooling layers.Step S20 is specifically, continue to note
Enter molten steel, molten steel liquid level reaches second cooling layer from bottom to up, keeps flat the electromagnetic induction component reclaimed water of first cooling layer
Put and coil blackout above, horizontal positioned in the electromagnetic induction component of second cooling layer and underlying coil leads to
Electricity；
After being kept for predetermined time, make horizontal positioned in the electromagnetic induction component of second cooling layer and underlying line
Circle powers off, other coil electricities in the electromagnetic induction component of second cooling layer；
As molten steel is gradually injected, molten steel liquid level reaches the 3rd cooling layer from bottom to up, makes the electricity of second cooling layer
Horizontal positioned and above coil blackout in magnetic induction component, it is horizontal positioned in the electromagnetic induction component of the 3rd cooling layer
And underlying coil electricity.
That is, independent tune is carried out respectively by taking embodiment one as an example, while for the electromagnetic induction coil of each cooling layer
It is whole, it is final to realize that coil 34, top that four coils 34 being vertically arranged in left side, four, right side are vertically arranged are horizontally disposed
The collective effect of the horizontally disposed coil 32 of coil 32, bottommost, forms big region closed magnetic field, and the molten steel in casting cavity is formed
Circulating from bottom to top, is circulated the molten steel of over-heat at the bottom, promotes the flowing of molten steel, eliminates casting cavity center
Locate the degree of superheat of molten steel, while uniform molten steel component, fractureed thick column crystal by systemic circulation flowing, promote to fracture broken
Column crystal forms the nuclei of crystallization, and molten steel is quick to form substantial amounts of tiny equiax crystal centered on the nuclei of crystallization.
As another enforceable mode, step S20 comprises the following steps：
Step S21 ', continue to inject molten steel, as molten steel liquid level reaches each cooling layer from bottom to up, successively make molten steel liquid
Each coil electricity in cooling layer where face, adjacent cooling layer reclaimed water is kept flat below the cooling layer where molten steel liquid level
Put and underlying coil and two coils placing vertically power off；
Step S22 ', molten steel gradually solidify, and make the adjacent cooling layer reclaimed water in the cooling layer lower section where being located at molten steel liquid level
Placing flat and coil blackout above；
Step S23 ', when molten steel liquid level reaches the cooling layer of the top, each coil electricity in the cooling layer of the top,
After being kept for predetermined time, horizontal positioned in electromagnetic induction component and underlying coil and two coils placed vertically are equal
Power-off.
By taking embodiment two and embodiment three as an example, cooling mould includes three cooling layers.Step S20 is specifically, continue to note
Enter molten steel, as molten steel liquid level reaches second cooling layer from bottom to up, in the electromagnetic induction component for making second cooling layer
Each coil electricity, horizontal positioned in the electromagnetic induction component of first cooling layer and underlying coil and place vertically two
Individual coil powers off；
Molten steel gradually solidifies, and coil horizontal positioned and above in the electromagnetic induction component of first cooling layer is broken
Electricity；
When molten steel liquid level reaches the 3rd cooling layer, each coil electricity in the 3rd cooling layer, when keeping predetermined
Between after, horizontal positioned in electromagnetic induction component and underlying coil and two coils placed vertically power off.Namely
Say, with the progress of solidification, close successively and in batches each coil.
As another enforceable mode, horizontally disposed coil in the electromagnetic induction component of first cooling layer is opened
32, according to the solidification process of molten steel, at the end of the solidification of molten steel of first cooling layer in bottom, close the cooling layer of bottom first
Electromagnetic induction component coil, open second cooling layer in two horizontally disposed coils 32.Successively open molten steel liquid level
The horizontally disposed coil 32 of place layer, set using level in second cooling layer, the 3rd cooling layer and the top cooling layer
The coil 32 put, induced field of the zone of action near not solidified molten steel is formed, molten steel is stirred, forms height side
To circulation flow field up and down, promote the homogenization of liquid steel temperature and composition.Increase cooling water inflow simultaneously, improve intensity of cooling, add
The setting rate of centre molten steel in fast steel ingot die, the molten steel in centre is promoted to form the equiax crystal of fine uniform.
With the continuation of solidification, the electromagnetic induction coil of second cooling layer of closing, the sensing of the 3rd cooling layer of unlatching
Two horizontally disposed coils 32 in coil, the induced field formed using the coil of the 3rd cooling layer in respective regions are right
Molten steel is stirred.After the completion of the solidification of molten steel of the 3rd cooling layer, the coil of the 3rd cooling layer is closed, utilizes the 4th
The coil of cooling layer forms the stirring magnetic field of smaller area, and the region molten steel is stirred.Until the solidification of molten steel of top
After end, the coil of the top cooling layer is closed, electromagnetic agitation process terminates.
Steel ingot all after solidification, stops the power supply of electromagnetic mixing apparatus, cold with reference to being detected in ingot steel casting software systems
But wall temperature and cooling water temperature, suitably reduce cooling water flow, continue to cool down steel ingot, treat steel ingot chilling temperature
After reaching technological requirement temperature, stop cooling water recirculation system.The clamping device of four sides side wall 22 is discharged, guarantor is hung using overhead traveling crane
Warm rising head, then four sides side wall 22 is increased into the distance between steel ingot and cooling wall 20 to moving around, it is dynamic to carry out the steel ingot demoulding
Make, taken out steel ingot using overhead traveling crane.The runner brick of residual and residual steel in chassis 10 will be poured into a mould to remove, cluster bottom mold is laid again, be
Production is prepared next time.
Due to the progress of solidification of molten steel, the molten steel on steel ingot top layer forms certain thickness solidified shell, and the volume of molten steel is gradual
Reduce, cross section is also gradually decreasing, using drive mechanism 50, to four, upper and lower, left and right coil in each electromagnetic induction component
It is driven, each coil is drawn close towards the center of the electromagnetic induction component where it, reduces the distance between each coil, is increased
The intensity of big induced field, the closed magnetic field that a zone of action is more concentrated is formed, not solidified molten steel is stirred, changed
The flowing of kind molten steel and heat transfer condition, the segregation disperseed in molten steel, remove gas inclusions etc..
As another enforceable mode, according to the needs of ingot solidification process, using drive mechanism 50 to each line
Circle carries out the movement of short transverse, and adjustment induced field slowly rises in the zone of action of short transverse, electromagnetic induction component,
Moved in the range of certain altitude, meet that diverse location carries out the needs of electromagnetic agitation.
As another enforceable mode, by taking embodiment one as an example, a certain upper left side of side wall 22 or right side can be opened
Four coils 34 being vertically arranged, form a magnetic field using this four coils, local stirring carried out to molten steel；Open simultaneously
With symmetrical four coils 34 being vertically arranged of this four coils in relative side wall 22, a closure for running through casting cavity is formed
Magnetic field, the molten steel in casting cavity is stirred.Similarly, coil 32 horizontal positioned in two relative side walls 22 is opened,
Eight closed magnetic fields for running through casting cavity are formed in short transverse, the molten steel in casting cavity is stirred.
In molten steel casting process and follow-up process of setting, according to intensity of cooling and technological requirement, overall process electromagnetism is realized
The controllable precise of sensing, for being easy to produce internal defect, shrinkage cavity and the local electromagnetic induction control of the position of segregation progress, utilize
Electromagnetic force caused by magnet coil is stirred to not solidified molten steel, realizes the controllable flow of molten steel, superheat of liquid steel it is fast
Speed dissipates and the dispersion of high concentration element, makes ingot composition uniform, fracture thick column crystal, forms tiny equiax crystal
Core, enough nuclei of crystallization are provided for the formation of isometric crystalline region, the steel ingot of high equiax crystal area ratio, while crystal grain thinning is produced, carries
High steel ingot intensity and performance.
The coil of each electromagnetic induction component uses the form of combination, can form the induced field of horizontal direction, and can shape
The magnetic field agitation in big region, zonule into single side, the horizontal annular flowing of molten steel in casting cavity is realized, can also realize steel
Annularly flow of the liquid in the big region of vertical direction, moreover it is possible to braking effect is produced to the molten steel jet for pouring into a mould the stage, avoids opening and pours steel
The jet velocity of liquid is too fast, causes splash to endanger.
The unlatching of electromagnetic induction component and switch operation, the different phase of ingot solidification can be directed to, passes through control coil
The sense of current and current strength, realize the accurate control of local electromagnetic agitation.
Particular embodiments described above, the purpose of this utility model, technical scheme and beneficial effect are carried out to enter one
The detailed description of step, it will be appreciated that the foregoing is only specific embodiment of the utility model, be not used to limit this reality
With new protection domain.Particularly point out, to those skilled in the art, it is all the spirit and principles of the utility model it
It is interior, any modification, equivalent substitution and improvements done etc., it should be included within the scope of protection of the utility model.
Claims (10)
1. one kind cooling mould, it is characterised in that the cooling mould includes cast chassis and is sealedly connected on the cast bottom
Condenser wall on disk, the condenser wall with it is described cast chassis enclose to be formed with upper shed be used for accommodate molten steel to be cooled
Casting cavity, the condenser wall include at least two cooling layers vertically set gradually；
The cooling mould also includes being arranged at least two pairs of electromagnetic induction components on the outside of the condenser wall, electromagnetism described in each pair
Inductive component is symmetricly set on the both sides of the casting cavity, and few a pair of electromagnetism are respectively provided on each cooling layer
Inductive component；Each electromagnetic induction component includes at least two pairs of coils, and two coils in coil described in each pair are equal
Parallel and be oppositely arranged, each coil can be slidably connected in the condenser wall respectively；
In each electromagnetic induction component, wherein at least a pair coils are vertically arranged, and at least one pair of described previous level is set
Put, horizontally disposed each coil is located between the center line for each coil being vertically arranged；The both ends of each coil
Head and the tail are relative successively, surround semi-enclosed rectangle, or the both ends head and the tail of each coil are sequentially connected, and surround the square of closing
Shape.
2. cooling mould according to claim 1, it is characterised in that the condenser wall includes four pieces of side walls, each side
Wall encloses the casting cavity, and at least two electromagnetic induction components are vertically set respectively in each side wall；
In each electromagnetic induction component, two sides of each coil for being vertically arranged respectively close to the side wall where it
Edge.
3. cooling mould according to claim 2, it is characterised in that each side wall includes setting successively from the inside to the outside respectively
The working plate and backboard put, each working plate and each backboard are each made of a metal, the inner side of each working plate and institute
State chassis and enclose the casting cavity；
Each working plate includes at least two sections of working plate subregions for being sequentially connected from bottom to up, each in each working plate
The thermal conductivity of the working plate subregion is sequentially reduced from bottom to up.
4. cooling mould according to claim 3, it is characterised in that the thickness of the working plate gradually increases from bottom to up
Add.
5. cooling mould according to claim 1, it is characterised in that the cooling mould also includes being arranged on the condensation
At least two pairs of water supply mechanisms on the outside of wall, each cooling layer are respectively provided to few a pair of water supply mechanisms, supplied described in each pair
Water dispenser structure is symmetricly set on the both sides of the casting cavity；
Each water supply mechanism includes the cooling of inlet water tank, water tank and the connection inlet water tank and the water tank respectively
Passage；In each water supply mechanism, the inlet water tank is respectively positioned on the lower section of the water tank.
6. mould is cooled down according to claim 1 or 5, it is characterised in that each electromagnetic induction component includes four
The coil, in each electromagnetic induction component, coil is vertically arranged described in two of which, and previous level is set described in another two
Put；
Each coil is made by hollow pipe, and each electromagnetic induction component, which also includes corresponding with each coil, to be set
Four cooling water pipes, each cooling water pipe connects with the corresponding hollow pipe respectively, and respectively by the cooling water in the external world
The hollow pipe corresponding to circulation input.
7. cooling mould according to claim 5, it is characterised in that in each electromagnetic induction component, it is horizontal positioned and
The coil above is placed in the water tank of the cooling layer where it, horizontal positioned and underlying institute
Coil is stated to be placed in the inlet water tank of the cooling layer where it.
8. cooling mould according to claim 1, it is characterised in that each electromagnetic induction component also include with it is each described
Coil corresponds four drive mechanisms set, and each drive mechanism is connected to the outside of the condenser wall, and divides
Not Qu Dong corresponding to the coil move up and down or move horizontally.
9. cooling mould according to claim 1, it is characterised in that place iron core respectively in each coil.
10. cooling mould according to claim 1, it is characterised in that each coil is made of copper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720423466.1U CN206869042U (en) | 2017-04-20 | 2017-04-20 | One kind cooling mould |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720423466.1U CN206869042U (en) | 2017-04-20 | 2017-04-20 | One kind cooling mould |
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| Publication Number | Publication Date |
|---|---|
| CN206869042U true CN206869042U (en) | 2018-01-12 |
Family
ID=61343631
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720423466.1U Active CN206869042U (en) | 2017-04-20 | 2017-04-20 | One kind cooling mould |
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|---|---|
| CN (1) | CN206869042U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107008884A (en) * | 2017-04-20 | 2017-08-04 | 中冶京诚工程技术有限公司 | A kind of method for cooling down mould and cooling down steel ingot |
| CN114799092A (en) * | 2022-05-06 | 2022-07-29 | 上海交通大学 | Liquid additive casting method for accelerating cooling of liquid spray solidification |
-
2017
- 2017-04-20 CN CN201720423466.1U patent/CN206869042U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107008884A (en) * | 2017-04-20 | 2017-08-04 | 中冶京诚工程技术有限公司 | A kind of method for cooling down mould and cooling down steel ingot |
| CN114799092A (en) * | 2022-05-06 | 2022-07-29 | 上海交通大学 | Liquid additive casting method for accelerating cooling of liquid spray solidification |
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