CN107073574A - Impact pad includes the cast disk and equipment and its application method of impact pad - Google Patents
Impact pad includes the cast disk and equipment and its application method of impact pad Download PDFInfo
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- CN107073574A CN107073574A CN201580049513.4A CN201580049513A CN107073574A CN 107073574 A CN107073574 A CN 107073574A CN 201580049513 A CN201580049513 A CN 201580049513A CN 107073574 A CN107073574 A CN 107073574A
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- impact pad
- region
- taper
- roof
- cast disk
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
- B22D41/003—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like with impact pads
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/10—Supplying or treating molten metal
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/10—Supplying or treating molten metal
- B22D11/103—Distributing the molten metal, e.g. using runners, floats, distributors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
- B22D41/02—Linings
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
- Continuous Casting (AREA)
- Laminated Bodies (AREA)
- Food-Manufacturing Devices (AREA)
- Cookers (AREA)
- Vibration Dampers (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
The present invention provides cast disk impact pad, the cast disk comprising the cast disk impact pad and its application method and the component comprising impact pad and cast disk.Cast disk impact pad is characterised by including：Base portion, the base portion has base surface, and the base surface includes taper shock surface region, and the taper shock surface region forms summit；Side wall；And roof, the roof is extended internally relative to side wall, to terminate inside edge, and inward flange formation nozzle part opening, the nozzle part opening is opened with vertex spacings above summit and is centered about relative to summit.Roof includes antelabium, and the antelabium is sloped inwardly and downwardly radially toward taper shock surface.
Description
The cross reference of related application and priority request
This application claims the U.S. Provisional Application No.62/037 that August in 2014 is submitted on the 15th, 949 priority, this is interim
The entire disclosure of application is herein incorporated by reference.
Technical field
The present invention relates to the impact pad used in steel-making, more particularly to cast disk impact pad, it is suitable to reduce by feeding
Turbulent flow and the weld pool surface destruction of the steel ladle miscarriage life of the molten steel in disk are poured into a mould to continuous casting machine.The invention further relates to wrap
The cast disk and equipment of impact pad are included, and uses the method for impact pad, cast disk and equipment.
Background technology
The equipment that steel casting machine is performed for continuously casting, also referred to as chain type is cast in the art.Continuously casting
Including by the steel of fusing from converter is delivered to steel ladle.The steel of fusing be fed through from steel ladle steel ladle shield (
It is referred to as steel ladle shield), the shield is extended in the referred to as container or vessel of cast disk.The steel of fusing is generally with continuously or partly
Continuous liquid flow is fed into the molten steel molten bath included in cast disk.Cast disk is typically used as reservoir, the steel of fusing
Can be in the case of no interruption or undesirable shutdown from the reservoir is fed into casting machine die.For molding casting
The steel of fusing in disk is from undesirable chemical reaction (such as over oxidation) and airborne particulate matter, it is allowed in fusing
Protectiveness clinker lid/layer or " fluxing agent " are formed at the surface in steel molten bath.
The surface requirements and cleannes standard of modern high-quality steel product are very low to the tolerance of impurity and chemical change.
Impurity and chemical change are by being that the steel ladle that the steel for the fusing being fed into cast disk is introduced is miscarried caused by raw turbulent flow.
For receiving some cast disks design of liquid steel to cause unfavorable fluid flow conditions, example in cast disk from steel ladle shield
Such as turbulent flow, and promote extremely free surface flow.For example, the raw fluid stream of the steel ladle miscarriage introduced may be from flat
Try to get to the heart of a matter plate and side wall of cast reflects towards the surface of liquid steel.The flow of fluid of this generation causes turbulent flow wallop, a large amount of
Fluctuation and steel molten bath surface at sputtering.
For example, Figure 10 shows that the single-chain type with asymmetric fluid stream 9a pours into a mould the longitudinal cross-section of disk 1.Steel ladle is protected
Cover 7 is shown as adjacent with end wall 3, and the end wall and brick cup (not shown in figures 10 and 11) are relative.Pattern of water flow studies have shown that by
The fluid stream that the molten steel packet stream 8 of introducing from steel ladle shield 7 is produced tries to get to the heart of a matter plate 4 along upwardly direction from flat cast
Reflected towards the surface of liquid steel.If the fluid stream is cast the limitation of disk wall 2 and 3, then the fluid stream of limitation is along the wall
2nd, 3 surface is forced upwardly traveling.This flow up follows circular path 9c, and is produced upwards along the surface of end wall 3
Surge and flowing downward around steel ladle shield 7.Circle stream 9c upward surge causes excessive at the surface in molten bath
Turbulent flow.These extremely free surface activities generate a kind of top for the phenomenon, thus steel molten bath referred to as " widened the view " in cast disk
Protectiveness clinker covering 6 in portion ruptures.Liquid steel is exposed to surrounding environment by the clinker covering 6 of rupture, and is formed
Be conducive to the condition for changing the chemical characteristic in steel molten bath and inclusion being produced in steel molten bath.Chemical change is usually directed in molten bath
The loss of aluminium and/or oxygen and nitrogen are absorbed in steel molten bath and follow-up surface is reoxidized.It is reoxidized and other undesirable
Reaction for example excessive aluminum oxide, manganese sulfide and calcium sulfide may be incorporated into steel molten bath.In addition, around steel ladle
Flow downward generation shearing force and the vortex of shield 7, and the particulate matter 10 of rupture is downward from the fluxing agent covering 6 of rupture
Trap and move in liquid steel molten bath.The particulate matter 10 of these ruptures is finally discharged together with the steel of fusing from cast disk, and
Inclusion is produced in final product made from steel.
Chemical change and inclusion eventually reduce steel quality, and are limitation high value steel grade (such as HIC and plate armour
Plate grade) main cause.In addition, high-temperature liquid state steel to pour into a mould Pan Bi sputtering there may be for operator safety it is hidden
Suffer from.Using conventional equipment, on lacking steel bath temperature homogenieity and may also be gone wrong in terms of the inadequate residence time,
Residence time is floated on protectiveness clinker covering to the particulate matter that allows to include, wherein particulate matter can with liquid steel every
From and/or separate.
Various trials have been carried out to reduce or eliminate the turbulent surface flow in continuous casting machine cast disk, it is final to improve
The quality of product made from steel.These trials include miscellaneous dam and weir, and molten steel packet stream fluid stream is rebooted and leaves fusing by it
The surface in steel molten bath.Although some known fluid flow control devices have successfully controlled fluid stream and reduced to a certain extent
Turbulent surface flow, but such control device is inadequate for the demand of high-quality steel, and/or tend to cause operation to be asked
Topic, such as those problems as described above.
The content of the invention
Disk impact pad is poured into a mould there is provided one kind according to the first aspect of the invention, the cast disk impact pad is characterised by
Including：Base portion, the base portion has base surface, and the base surface includes taper shock surface region, the taper shock surface area
Domain forms summit；Side wall；And roof, the roof extends internally relative to side wall, to terminate inside edge, the inward flange shape
Into nozzle part opening, the nozzle part opening is opened with vertex spacings above summit and is centered about relative to summit.Roof includes lip
Edge, the antelabium is sloped inwardly and downwardly radially toward taper shock surface.
The second aspect of the invention provides a kind of equipment, and the equipment is characterised by including：Continuous casting machine pours into a mould disk,
Continuous casting machine cast disk is used for the reservoir for accommodating fusing metal, and the fusing metal has raw by the miscarriage of introducing steel ladle
Fluid stream；And the cast disk impact pad in continuous casting machine cast disk.Cast disk impact pad includes：Base portion, the base portion has
Base surface, the base surface includes taper shock surface region, and the taper shock surface region forms summit；Side wall；And
Roof, the roof is extended internally relative to side wall, to terminate inside edge, and inward flange formation nozzle part opening, the mouth is opened
Mouth is opened with vertex spacings above summit and is centered about relative to summit.Roof include antelabium, the antelabium radially toward
Taper shock surface is sloped inwardly and downwardly.
The third aspect of the invention provides a kind of chain type casting method or molten steel processing method, wherein by melting liquid
Steel be introduced into steel ladle flow into be given to continuous casting machine cast disk in, and can flow through cast disk impact pad nozzle part opening
And the taper shock surface region of disk impact pad is poured into a mould in impact before entering in cast disk reservoir.Pouring into a mould disk impact pad includes tool
There are the base portion, side wall and roof of base surface, the roof extends internally relative to side wall, to terminate inside edge, the inner edge
Edge formation nozzle part opening, the nozzle part opening is opened above the summit in taper shock surface region with vertex spacings and relative to top
Point is centered about.Roof includes antelabium, and the antelabium is sloped inwardly and downwardly radially toward taper shock surface.
According to the embodiment of various aspects described herein, the roof of cast disk impact pad is characterised by including following table
Face, the continuous side walls inner surface of the lower surface and base surface and side wall is collectively forming continuous circular shape chamber, the continuous circular shape chamber
Room is configured to reduce the turbulent flow of the introducing molten steel packet stream of melting liquid steel.
According to another embodiment of above-mentioned aspect, taper shock surface region has the axis through summit, taper punching
Surface region is hit around the Axial-rotational Symmetry.
According to another embodiment of above-mentioned aspect, taper shock surface region has linear profile.
According to another embodiment of above-mentioned aspect, taper shock surface region has from the outer of taper shock surface region
The cone angle of inclination planar survey residing for horizontal plane to taper shock surface region residing for periphery, the scope of the cone angle is about 15
Degree is to about 25 degree.
According to another embodiment of above-mentioned aspect, antelabium have the following table planar survey from horizontal plane to antelabium to lower lip
Edge angle, this to the scope of lower lip angle be about 20 degree to about 25 degree.
According to another embodiment of above-mentioned aspect, the radius of curvature of continuous circular shape chamber is about 30mm.
According to another embodiment of above-mentioned aspect, the lower surface area point of raised (such as hemispherical projections) around antelabium
Cloth.
Above-described embodiment can be implemented in any combination way each other.
In the case where reading the detailed description of following exemplary embodiment, other side and embodiment of the invention, bag
Include and constitute the present invention a part of equipment, component, device, product, method of manufacture and use thereof, process etc., it will become brighter
It is aobvious.
Brief description of the drawings
Accompanying drawing combines in the description and constitutes a part for specification.Accompanying drawing and above-mentioned general description and following give
The detailed description of the exemplary embodiment and method that go out together, for explain the present invention principle.In the accompanying drawings：
Fig. 1 is the longitudinal cross-section that disk is poured into a mould according to the single-chain type casting machine including impact pad of one embodiment of the invention
Front perspective view；
Fig. 2 pours into a mould the longitudinal cross-section front view of disk for Fig. 1 single-chain type casting machine；
Fig. 3 is the front perspective view of the impact pad of the embodiment shown in Fig. 1；
Fig. 4 is the plan of Fig. 3 impact pad；
Fig. 5 is the cross-sectional view intercepted along Fig. 4 line V-V；
Fig. 6 is the broken side perspective view of Fig. 3-5 impact pad；
Fig. 7 is the cross sectional end view obtained from the viewpoint of the arrow on Fig. 1 and 2 right side, shows and is drawn by shield
The flow profile for the introducing liquid steel led, the shield is centrally positioned on above impact pad；
Fig. 8 is the cross-sectional view of the impact pad according to another embodiment of the present invention；
Fig. 9 is the bottom sectional view intercepted along Fig. 8 line IX-IX；
Figure 10 and 11 has reproduced United States Patent (USP) No.Re.35, and 685, wherein Figure 10 is the longitudinal direction that pattern of water flow studies cast disk
Cross-sectional view, Figure 11 is the lateral cross figure intercepted along Figure 10 line XI-XI.
Embodiment
Now with detailed reference to exemplary embodiment as shown in drawings and method, wherein similar attached in whole accompanying drawing
Icon note represents similar or corresponding part.It is pointed out, however, that the present invention in terms of its is broad in need not limit
In with reference to shown in exemplary embodiment and method and described specific detail, representative materials and method and illustrative examples.
According to the cast disk for chain type casting machine of exemplary embodiment entirety by reference number 10 in fig 1 and 2
Represent.Although showing single-chain type casting machine herein, but it is to be understood that embodiments of the invention can combine double-chain
Or other many chain type casting machines are implemented.Many chain type casting machine designs are shown in United States Patent (USP) No.RE35,685 Figure 10
Example (although with different impact pads).Pouring into a mould disk 10 includes cast disk end wall 12 and 14, cast disk front side wall and rear side
Wall (no reference) and cast are tried to get to the heart of a matter plate 16, the cast try to get to the heart of a matter plate extend between end wall 12,14 and side wall and with end
Wall and side wall connection (or integratedly combining).Cast disk end wall 12,14 and bottom plate 16 are collectively forming chamber or reservoir 18, with
In receiving and holding molten steel molten bath.Cast disk impact pad 20 is positioned in reservoir 18, for example compared with apart from end wall 14 more
Close to end wall 12.Be positioned at the top of cast disk impact pad 20 is the low portion of steel ladle shield 22, for by molten steel
The molten steel packet stream 24 (Fig. 7) being introduced into be directed in impact pad 20.Steel ladle shield 22 is shown extend through the top in molten steel molten bath
Portion, the end of steel ladle shield 22 is spaced apart in the top of cast disk impact pad 20 with cast disk impact pad, and with pouring into a mould disk
Impact pad is coaxially centered about.The flowing of molten steel and the structure and work(of impact pad 20 are discussed in detail further below
Energy.
Pouring into a mould disk 10 also includes weir portion 26, and it is left and right (first and second) compartment that the weir portion, which will correspondingly pour into a mould 10 points of disk,
18a and 18b, in fig 1 and 2, impact pad 20 are in right compartment 18a, are tried to get to the heart of a matter positioned at cast on plate 16.The bottom bag in weir portion 26
Passage 26a is included, for allowing the fluid communication between the liquid steel in left compartment and right compartment 18a, 18b.Diffuser 28 is determined
Cast of the position in right compartment 18a is tried to get to the heart of a matter on plate 16, between weir portion 26 and cast disk impact pad 20.With multiple to updip
The cast that tiltedly dyke 30 of cylindrical channel 30a (along flow direction from right to left) is resisted against in left compartment 18b is tried to get to the heart of a matter plate
On 16.On the side relative with weir portion 26 of dyke 30, stopper rod 32 is aligned with output port or cast disk brick cup 34, liquid steel
Discharged by the output port or cast disk brick cup from cast disk 10.The upward motion of stopper rod 32 and move downward control molten steel
From cast disk 10 flows out and flows to casting machine (not shown).
Cast disk impact pad 20 can be by being suitable for pouring into a mould the one kind used in disk in the casting machine handled for molten steel
Or multiple material is made.Generally, such material have high impact resistance and corrosion resistance, high calorific intensity and fire resistance,
And good Castability.The example of suitable material is metal, ceramics and the sandstone with ceramic coating.As specific
But nonrestrictive example, low water content, high-alumina may be cast as composition (such as Narcon 70Castable) and coarse
High-alumina, low cement may be cast as composition (for example70C Plus) it is suitable for being used as cast disk impact
The refractory material of pad 20.According to product information：Narcon 70Castable include the silica of (calcined basis) 26.9%
(SiO2), 69.8% aluminum oxide (Al2O3), 1.7% titanium dioxide (TiO2), 0.8% iron oxide (Fe2O3), 0.7%
Lime (CaO) and 0.1% alkali (Na2O)；70C Plus include the dioxy of (calcined basis) 27.5%
SiClx (SiO2), 67.3% aluminum oxide (Al2O3), 2.1% titanium dioxide (TiO2), 1.2% iron oxide (Fe2O3)、
1.6% lime (CaO), 0.1% magnesia (MgO) and 0.2% alkali metal (Na2O+K2O).Pour into a mould disk impact pad 20
Body part can be coated with the material of resistance to corrosion to form the coating of resistance to corrosion, for receive introduce molten steel packet stream 24 and with
The molten steel packet stream contact of introducing.The coating of resistance to corrosion can by medium radiation rate material (such as zirconium oxide, yittrium oxide, carborundum),
Highly reflective material (such as aluminium and aluminum oxide) or high temperature non-oxygenated lubricant (such as boron nitride) are made.
Embodiment with reference to shown in Fig. 3-6, cast disk impact pad 20 includes round base portion 40 and (relative to plan view or faced upward
View).Base portion 40 includes top base surface and adjacent adjacent annular base surface region 44, and the top base surface has
Taper shock surface region 42, the annular base surface region concentrically surrounds taper shock surface region 42.It is real in diagram
Apply in example, taper shock surface region 42 is not truncation.Alternatively, the top in taper shock surface region 42 can fall slightly
Circle, but still keep conical by its shape.As being best shown in Fig. 5, taper shock surface region 42 is upwardly extended, to terminate at top
At point or top 46.Taper shock surface region 42 is rotationally symmetrical around the axis of imaginaries Az (Fig. 5) through summit 46.It is real in diagram
Apply in example, taper shock surface region 42, which has in linear profile or cross section, such as Fig. 5, to be best shown at.Taper shock surface
The bottom of the linear profile in region 42 is terminated at neighboring 48, the neighboring and the radial inner edge of annular base surface region 44
Edge is adjacent and adjacent.Terminated at the top of the linear profile in taper shock surface region 42 at point corresponding with summit 46, should
Point is overlapped with axis Az.Annular base surface region 44 can be flat at least in part, and in the bottom with base portion 40
In horizontal plane parallel portion surface 40a.
Pouring into a mould disk impact pad 20 also includes side wall 50, and the side wall has side wall inner surfaces 52, the side wall inner surfaces continuously/
Incessantly around to itself, so as to be rendered as a ring when viewed from the top, as shown in Figure 4.Side wall 50 is shown as
There is uniform thickness in the range of its whole 360 degree.Side wall inner surfaces 52 are concentrically positioned at annular base surface region 44
Outside, and be approximately perpendicular to annular base surface region.It is best shown in such as Fig. 5 cross-sectional view, side wall inner surfaces
52 include curve transition region 54,56 respectively in its bottom and top.Curve transition region 54,56 can be mutually symmetrical.
The end of lower knuckle transitional region 54 is concordant with annular base surface region 44 and side wall inner surfaces 52 and adjacent.Lower knuckle
Transitional region 54 is continuously bent between base portion 40 and side wall inner surfaces 52.
Pouring into a mould disk impact pad 20 also includes roof 60, and the roof extends internally from top transitional region 56, and substantially hangs down
Directly in side wall 50 to terminate at inward flange 62.Top transitional region 56 is configured to curvilinear undercuts, and the curvilinear undercuts are in side wall
Continuously bent between inner surface 52 and roof 60, and the end of the curvilinear undercuts is concordant with side wall inner surfaces 52 and roof 60
And it is adjacent.The nozzle part opening 64 formed by inward flange 62 is opened in the top of summit 46 with vertex spacings, and is occupied relative to the summit
Middle positioning.When in use, nozzle part opening 64 is in the lower section of steel ladle shield 22 and coaxial with the steel ladle shield, is drawn with receiving
The molten steel packet stream 24 entered.In the illustrated embodiment, the diameter of nozzle part opening 64 is substantially equal to or less than taper shock surface region
The diameter of 42 neighboring 48.
Roof 60 includes antelabium 66, and the antelabium is sloped inwardly and downwardly, to terminate at inward flange 62.Roof 60 has the
One lower surface areas 60a and the second lower surface areas (also referred herein as portion of lower lip surface) 66a, this is under first
Portion's surface region is horizontal-extending substantially in parallel with lower surface 40a, and second lower surface areas corresponds to the bottom of antelabium 66
Portion.Portion of lower lip surface 66a radially inward and dips down from the first lower surface areas 60a towards taper shock surface 42
Tiltedly.As being best shown in Figure 4 and 5, the first lower surface areas 60a and portion of lower lip surface 66a join at 60b.
Base portion 40, side wall 50 and roof 60 can be it is integral, that is, global facility or integrated part.As in addition
One kind selection, base portion 40, side wall 50, roof 60 and/or pour into a mould the other parts of disk 10 can be by each other temporarily or permanently
The single part of connection is formed.Taper shock surface region 42, annular base surface region 44, continuous side walls inner surface 52,
It can be torus shape that curve transition surface region 54,56 and lower surface areas 60a, 66a are collectively forming around axis Az
The continuous circular shape chamber of formula.
With reference to Fig. 7, liquid steel is directed into cast disk 10 by shield or inlet 22, is used as the molten steel packet stream of introducing
24.It has been found that the diameter D of the internal diameter of shield 22jWith the diameter D of nozzle part opening 64mRatio (Dj/Dm) about 0.3 to
Especially good result is provided in the range of about 0.4.In the exemplary embodiment, steel ladle shield 22 and nozzle part opening 64
It is aligned coaxially with each other.The design of exemplary embodiment as described herein causes the impact taper collimeter of molten steel packet stream 24 introduced
Face region 42, the taper shock surface region will flow 24 lower transition part 54 and the weights of side wall inner surfaces 52 radially outward toward
New guiding.Continuous circular shape chamber is shaped such that molten steel stream towards the reverse reflux of molten steel packet stream 24 introduced, to reduce turbulent flow
And the energy of dissipation molten steel before molten steel flows from impact pad 10.Reverse fluid stream is upwardly through nozzle part opening 64
Discharge, then substantially radially flows as substantially laminar flow outward along all directions towards the wall for pouring into a mould disk 10.Pass through
There is provided diameter the nozzle part opening 64 bigger than the diameter of shield 22, annular is formed between the molten steel packet stream 24 and inward flange 62 of introducing
Flow up.
Molten steel leaves nozzle part opening 64 and enters first compartment 18a.The molten steel packet stream of introducing is continuously flowed into and melted
Steel causes the molten steel stream dam part 26 in compartment 18a by the removal of outlet 34 and flows through weir portion passage 26a.Through weir portion
After passage 28, molten steel flows through cylindrical channel 30a in the flowing of the top of dyke 30 and/or before by the discharge of outlet 34.
The steel stream of melting reverses and generates self-retention effect onto itself.Thus, the stream that molten steel passes through nozzle part opening 64
Go out and produce less turbulent flow and with relatively low energy into first compartment 18a.Thus, substantially reduce above-mentioned " widening the view " and
Sputtering problem.
In the specific illustrative embodiment for being designed to suppress " widening the view ", taper shock surface region 42 has from outer
The taper angle theta (Fig. 5) of inclination planar survey residing for horizontal plane to taper shock surface region 42 residing for periphery 48, the model of the cone angle
Enclose is about 15 degree to about 25 degree.In being designed to suppress another specific illustrative embodiment of " widening the view ", antelabium
66 have plane survey from horizontal plane to antelabium residing for 66 lower surface 66a to lower lip angle theta (θ), the angle
Scope be about 20 degree to about 25 degree.In being designed to suppress another specific illustrative embodiment of " widening the view ",
The radius of curvature of continuous circular shape chamber is about 30mm.Example can be implemented separately or with any group in these exemplary embodiments
The mode of conjunction is implemented together each other.The height that impulse chamber has can be equal to or more than the internal diameter of shield, to influence flowing to control
System.
Emulated to performing computational fluid dynamics (CFD) according to the impact pad of above parameter designing.With it is flat petal
Impact pad is compared, and implements the area average speed of embodiments of the invention (for the stream on the perfusion side of the top surface in steel molten bath
Move the measured value of activity) it is calculated as reducing about 50%.The possibility for forming " widening the view " is also calculated as reducing identical ratio
Example.Utilize the CFD analyses for the unit number and area average speed calculating speed and area for being wherein directed to mesh, area average speed
Determine as follows：
Generally, it has been found that higher area average speed correspond to more cast disk fluxing agent entrainment and
The steel of poor quality, and relatively low area average speed corresponds to the less steel for pouring into a mould the entrainment of disk fluxing agent and better quality.
Therefore, area average speed reduction about 50% significantly reduces the steel production that cast disk fluxing agent is carried secretly and produces better quality
Product.It is without being bound by theory, it is believed that the improved quality obtained using exemplary embodiment as described herein is attributable to following
One or more of：Cause that introducing stream and turbulent flow at a high speed is reduced due to " self-retention " effect；Starting and operating continuously the phase
Between sputter it is less；Residence time of the molten steel in reservoir is longer；Promote impurity and particulate matter emersion；And storage evenly
Storage temperature.
Fig. 8 and 9 shows the impact pad according to another exemplary embodiment.For brevity, following description collection
In difference between Fig. 8 and 9 exemplary embodiment and above-mentioned other examples embodiment.In different exemplary embodiments
In, similar reference represents similar or corresponding part.
In Fig. 8 and 9 exemplary embodiment, projection 80 carries out 360 degree of distributions around portion of lower lip surface 66a.It is raised
80 can be equally distributed, for example, matrix pattern, or random distribution or can otherwise be distributed.In figure
Show in embodiment, the outer surface of projection 80 has hemispherical shape.However, projection 80 can take alternative shape.This
Outside, projection 80 can have same or different shape relative to each other.It has been found that (the especially hemisphere of projection 80
Shape is raised) further reduce the rate of outflow of the liquid steel before impact pad 20 is left by nozzle part opening 64.In addition or
Alternatively, projection 80 can be located on the inner surface of impact pad at other position.
In order to explain the present invention principle and its practical application, there has been provided some exemplary embodiments it is foregoing in detail
Illustrate so that skilled artisans appreciate that various embodiments of the present invention and be suitable for it is conceivable that it is specific
The various modifications of purposes.The explanation need not be intended to detailed or limit the invention to disclosed specific embodiment.Explanation
Book describes particular instance, to realize the more generally target that can be realized by other mode.
Only those using word " being intended to " claim will according to 35USC112 the 6th section explain.In addition, saying
Bright book does not produce any limitation to any claim, unless these limitations are expressly included in claim.
Claims (21)
1. one kind cast disk impact pad, it includes：
Base portion, the base portion has base surface, and the base surface includes taper shock surface region, the taper shock surface region
Form summit；
Side wall；And
Roof, the roof extends internally relative to side wall, to terminate inside edge, inward flange formation nozzle part opening, the mouth
Portion's opening is opened with vertex spacings above summit and is centered about relative to summit, and roof includes antelabium, and the antelabium is radially
Sloped inwardly and downwardly towards taper shock surface.
2. cast disk impact pad according to claim 1, wherein side wall includes the company of the radial outside in base surface
Continuous side wall inner surfaces, and wherein roof includes lower surface, the lower surface and base surface and the common shape of continuous side walls inner surface
Into continuous circular shape chamber, the continuous circular shape chamber is configured to reduce the turbulent flow of the introducing molten steel packet stream of melting liquid steel.
3. cast disk impact pad according to claim 2, wherein：
Base surface also includes the first planar annular region between taper shock surface region and continuous side walls inner surface；
Roof is included in the second planar annular region extended between continuous side walls inner surface and antelabium；And
First planar annular region and the second planar annular region are spaced apart from each other and extended in plane parallel to each other.
4. it is according to any one of claim 1 to 3 cast disk impact pad, wherein taper shock surface region have through
The axis on summit, taper shock surface region surrounds the Axial-rotational Symmetry.
5. cast disk impact pad according to claim 4, wherein taper shock surface region has linear profile.
6. cast disk impact pad according to claim 5, wherein taper shock surface region has from taper shock surface
The cone angle of inclination planar survey residing for horizontal plane to the linear profile in taper shock surface region residing for the neighboring in region, should
The scope of cone angle is about 15 degree to about 25 degree.
7. cast disk impact pad according to any one of claim 1 to 6, wherein antelabium has from horizontal plane to antelabium
Following table planar survey to lower lip angle, this to the scope of lower lip angle be about 20 degree to about 25 degree.
8. cast disk impact pad according to any one of claim 1 to 7, wherein roof includes lower surface, the lower surface
Continuous circular shape chamber is collectively forming with base surface and continuous side walls inner surface, the radius of curvature of the continuous circular shape chamber is about
30mm。
9. cast disk impact pad according to any one of claim 1 to 8, it also includes：
Projection, the projection is distributed around the lower surface area of antelabium.
10. cast disk impact pad according to claim 9, its protrusions are shaped as hemispherical.
11. a kind of equipment, it includes：
Continuous casting machine pours into a mould disk, and continuous casting machine cast disk is used to accommodate with raw fluid stream of being miscarried by introducing steel ladle
Fusing metal reservoir；And
Cast disk impact pad according to any one of claim 1 to 10.
12. a kind of chain type casting method, it includes：
By melting liquid steel be introduced into steel ladle flow into be given to continuous casting machine cast disk in, the continuous casting machine cast disk include
Disk impact pad is poured into a mould, the cast disk impact pad includes
Base portion, the base portion has base surface, and the base surface includes taper shock surface region, the taper shock surface region
Form summit；
Side wall；And
Roof, the roof extends internally relative to side wall, to terminate inside edge, inward flange formation nozzle part opening, the mouth
Portion's opening is opened with vertex spacings above summit and is centered about relative to summit, and the nozzle part opening, which is positioned to receive, to be drawn
Enter molten steel packet stream, roof includes antelabium, and the antelabium is sloped inwardly and downwardly radially toward taper shock surface；
Make the introducing molten steel packet stream impact cone shape shock surface region of melting liquid steel；And
The melting liquid steel of impact is allowed to be discharged by nozzle part opening from cast disk impact pad.
13. chain type casting method according to claim 12, wherein side wall include the radial outside in base surface
Continuous side walls inner surface, and wherein roof includes lower surface, and the lower surface and base surface and continuous side walls inner surface are common
Continuous circular shape chamber is formed, the continuous circular shape chamber is configured to reduce the rapids of the introducing molten steel packet stream of melting liquid steel
Stream.
14. chain type casting method according to claim 13, wherein：
Base surface also includes the first planar annular region between taper shock surface region and continuous side walls inner surface；
Roof is included in the second planar annular region extended between continuous side walls inner surface and antelabium；And
First planar annular region and the second planar annular region are spaced apart from each other and extended in plane parallel to each other.
15. the chain type casting method according to any one of claim 12 to 14, wherein taper shock surface region have
Through the axis on summit, taper shock surface region surrounds the Axial-rotational Symmetry.
16. chain type casting method according to claim 15, wherein taper shock surface region have linear profile.
17. chain type casting method according to claim 16, wherein taper shock surface region have from taper collimeter
The cone angle of inclination planar survey residing for horizontal plane to the linear profile in taper shock surface region residing for the neighboring in face region,
The scope of the cone angle is about 15 degree to about 25 degree.
18. the chain type casting method according to any one of claim 12 to 17, wherein antelabium have from horizontal plane to lip
The following table planar survey of edge to lower lip angle, this to the scope of lower lip angle be about 20 degree to about 25 degree.
19. the chain type casting method according to any one of claim 12 to 18, wherein roof include lower surface, the following table
Face is collectively forming continuous circular shape chamber with base surface and continuous side walls inner surface, and the radius of curvature of the continuous circular shape chamber is big
About 30mm.
20. the chain type casting method according to any one of claim 12 to 19, it also includes：
Projection, the projection is distributed around the lower surface area of antelabium.
21. chain type casting method according to claim 20, its protrusions is shaped as hemispherical.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US201462037949P | 2014-08-15 | 2014-08-15 | |
| US62/037,949 | 2014-08-15 | ||
| PCT/US2015/045513 WO2016025948A1 (en) | 2014-08-15 | 2015-08-17 | Impact pad, tundish and apparatus including the impact pad, and method of using same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107073574A true CN107073574A (en) | 2017-08-18 |
| CN107073574B CN107073574B (en) | 2020-06-26 |
Family
ID=53938470
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201580049513.4A Active CN107073574B (en) | 2014-08-15 | 2015-08-17 | Impact pad, casting tray and apparatus including impact pad, and method of using same |
Country Status (12)
| Country | Link |
|---|---|
| EP (1) | EP3194095B1 (en) |
| JP (1) | JP6511512B2 (en) |
| KR (1) | KR102372586B1 (en) |
| CN (1) | CN107073574B (en) |
| BR (1) | BR112017002959B1 (en) |
| CA (1) | CA2957935C (en) |
| ES (1) | ES2856023T3 (en) |
| MX (2) | MX2017002094A (en) |
| RU (1) | RU2698026C2 (en) |
| UA (1) | UA121221C2 (en) |
| WO (1) | WO2016025948A1 (en) |
| ZA (1) | ZA201701824B (en) |
Cited By (2)
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|---|---|---|---|---|
| CN107812929A (en) * | 2017-11-06 | 2018-03-20 | 重庆大学 | A kind of tundish and its turbulence inhibitor |
| CN110814330A (en) * | 2019-12-25 | 2020-02-21 | 武汉科技大学 | Top rotating type turbulence controller for continuous casting tundish |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AR109299A1 (en) * | 2016-08-08 | 2018-11-14 | Vesuvius Crucible Co | IMPACT PLATE |
| JP7230634B2 (en) * | 2019-03-27 | 2023-03-01 | 日本製鉄株式会社 | Swirling flow imparting device, tundish, steel continuous casting system, and steel continuous casting method |
| CN218252879U (en) * | 2022-09-29 | 2023-01-10 | 维苏威高级陶瓷(中国)有限公司 | Tundish current stabilizer |
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- 2015-08-17 RU RU2017108202A patent/RU2698026C2/en active
- 2015-08-17 BR BR112017002959-6A patent/BR112017002959B1/en active IP Right Grant
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Also Published As
| Publication number | Publication date |
|---|---|
| RU2017108202A (en) | 2018-09-17 |
| BR112017002959B1 (en) | 2021-08-24 |
| MX2017002094A (en) | 2018-01-16 |
| CN107073574B (en) | 2020-06-26 |
| JP6511512B2 (en) | 2019-05-15 |
| BR112017002959A2 (en) | 2017-12-05 |
| WO2016025948A1 (en) | 2016-02-18 |
| RU2698026C2 (en) | 2019-08-21 |
| EP3194095A1 (en) | 2017-07-26 |
| EP3194095B1 (en) | 2021-01-06 |
| KR20170072871A (en) | 2017-06-27 |
| MX2022001364A (en) | 2022-03-17 |
| CA2957935C (en) | 2023-05-16 |
| ES2856023T3 (en) | 2021-09-27 |
| JP2017535430A (en) | 2017-11-30 |
| CA2957935A1 (en) | 2016-02-18 |
| UA121221C2 (en) | 2020-04-27 |
| ZA201701824B (en) | 2018-08-29 |
| KR102372586B1 (en) | 2022-03-08 |
| RU2017108202A3 (en) | 2019-03-22 |
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