CN105983666A - Slab crystallizer narrow-side cooper plate with curved surface profile consistent in shrinking - Google Patents
Slab crystallizer narrow-side cooper plate with curved surface profile consistent in shrinking Download PDFInfo
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Abstract
The invention provides a slab crystallizer narrow-side cooper plate with a curved surface profile consistent in shrinking and relates to metal continuous casting machines or equipment, in particular to manufacturing of a cast die which is provided with an opening in the bottom and used for metal continuous casting or a cast die plate material. The curve ABCDEF of the profile of an upper opening of the narrow-side copper plate is composed of an upper opening straight line CD, an upper opening oblique line AB, an upper opening oblique line EF, an upper opening arc line BC and an upper opening arc line DE, and the curve abcdef of the profile of a lower opening is composed of a lower opening straight line cd, a lower opening oblique line ab, a lower opening oblique line ef, a lower opening arc line bc and a lower opening arc line de. All the line segments of the curve ABCDEF of the profile of the upper opening are completely consistent with the corresponding line segments of the curve abcdef of the profile of the lower opening in shrinking percentage, it can be guaranteed that the thickness of a cast blank shell on the whole section is roughly uniform, shrinking of the cast blank is uniform and consistent, it is avoided that transverse cracks are generated on the corners of the cast blank of microalloyed peritectic steel and inferior-peritectic steel, the corner steel leakage accident generated in the continuous casting process can be avoided effectively, meanwhile the problem that at the corner of a crystallizer, the amount of continuous casting protective slag flowing into the portion between the copper plate and the blank shell is insufficient is solved, and the warping defect generated on the surface of the edge of a hot rolled plate is overcome.
Description
Technical field
The present invention relates to machinery or the equipment of continuous casting of metal, the bottom opening particularly for continuous casting of metal is cast
The manufacture of mould or mold plate.
Background technology
Plate slab crystallizer is " heart " of the very important parts of conticaster, referred to as continuous casting installation for casting.The basic knot of crystallizer
Structure is the bottomless ingot mould of a Forced water cooling, by two relative broadside copper coin (the widest face copper coin) and two opposite, narrow limits
Copper coin (also referred to as narrow copper plate) assembles and constitutes, and its effect is: (1) is under the highest pulling rate, it is ensured that go out crystallization
Device shell thickness, by the vibration of crystallizer, makes green shell depart from crystallizer wall and not be pulled off and bleed-out.(2) ensure
The generation that green shell is uniform and stable.(3) molten steel is made to be progressively solidified into the green shell of required specification, shape；Molten steel is at crystallizer
In solidification behavior normal production of cc billet surface quality and casting machine is had significant impact.
Angle, four, the working cavities square-section of conventional continuous cast mold is right angle, affects continuous casting billet quality and follow-up
Hot rolling processing characteristics, there is problems in that
1, being Two-Dimensional Heat due to crystallizer right angle portions, molten steel solidifies in crystallizer, and originally corner cooling is the fastest,
Early shrinking and formed air gap, corner departs from and the contacting of crystallizer inwall, and cools down the most slack-off, causes folding corner region green shell
Thin, the most easily go out the bleed-out at crystallizer end opening.
2, after slab goes out crystallizer, secondary cooling zone, owing to strand corner is Two-Dimensional Heat, corner surface temperature ratio are entered
Normal casting blank surface temperature is low 70～200 degree, and when producing micro alloyed steel, corner temperature cannot avoid the 3rd brittle zone,
Thus the problem causing strand angle transverse fissure.
3, the continuous casting covering slag of crystallizer corner portion can make to flow between copper coin and green shell deficiency, and lubricant effect is poor, therefore holds
Easily cause cc billet surface quality defect and bleed-out.
4, cross section four limit be the rectangular slab at right angle when Vertical Rolling adjusts width rolling, owing to adjusting wide drafts and slab width
Degree is compared and is seemed the least, deforms the impermeable central part to width of plate slab, only produces the areal deformation of slab side,
Make roughing intermediate blank edge that more sharp-pointed projection (dog bone shape section) to occur, bossing under the effect of cooling water,
Temperature reduces rapidly, enters high temperature inductile district, local laceration occurs during flat rolling subsequently, shows as hot rolling
Surface, edges of boards portion stick up skin defect.
There is disadvantages mentioned above for right angle crystallizer, existing mould at narrow copper coin frequently with the structure of side straps chamfering,
Mould at narrow copper coin chamfering structure typically uses two kinds of forms: the first form is folder in the middle of mould at narrow and wide face
Hold independent chamfering parts；Owing to independent chamfering parts are dependent on the contact cooling with copper coin, its chamfering the most all than
Less, generally 5～10mm, chamfering all makes plane oblique angle, unanimous between the higher and lower levels 45 °.Additionally, independent chamfering parts
Service life is the lowest.The second form is each side to make one at mould at narrow copper coin to be linked as with narrow limit copper coin
The side chamfering of one.Chinese utility model patent " slab continuous-casting crystallizer narrow-strop copper plate " (utility model patent number:
ZL02214026.3, Authorization Notice No.: CN2547438Y) disclose the mould at narrow copper coin of a kind of band side chamfering,
Its work surface both sides are designed with the triangle of protrusion, form a size of 6～10mm, and angle is the chamfering of 45 degree, strand
Four right angles become 8 obtuse angles.Chinese utility model patent " a kind of plate slab crystallizer " (utility model patent number:
ZL200720089029.7, Authorization Notice No.: CN201132207Y) disclose a kind of plate slab crystallizer, its narrow limit copper coin
With the curved surface of oriented broadside copper coin internal wall transitions, this fillet surface is arc surface, and the radius of circular arc chamfering is 2～10mm, because of
This its chamfering amount is less than 10mm.The shortcoming of technique scheme is that chamfering amount is little, and the lifting amplitude of strand corner temperature is little,
To solving strand transverse crack limited use.
(utility model patent number: ZL200920035404.9 authorizes Chinese utility model patent " continuous casting crystallizer for plate billet "
Notification number: CN201380275Y) disclose a kind of continuous casting crystallizer for plate billet, this crystallizer is by two relative width edge plates and biphase
The rectangle working chamber forming narrow side plate is constituted, and the outer surface of described rectangle working chamber is shaped with the bosh of roundabout distribution,
The arc transition curved surface that described narrow side plate and width edge plate adjacent side have, the corner of described rectangle working chamber forms arc transition
The knuckle that curved surface is constituted.The arc radius of this technical scheme is only 2-20mm, predominantly overcomes Vertical Rolling to adjust width to roll
Time processed there is sharp-pointed protruding phenomenon in roughing intermediate blank edge, to avoid the skin that sticks up on consequent hot rolled plate edge surface to lack
Fall into, but, this technical scheme is little to the lifting amplitude of strand corner temperature equally, thus makees solving strand transverse crack
With limited.
Tradition casting mold for continuous casting all uses up big and down small tapering.Although the mould at narrow copper coin of band side chamfering is already
Being applied in actual production, the form of chamfering is various.Such as, " one carries tapering to Chinese invention patent application
Continuous casting steel billet chamfer crystallizer " (application for a patent for invention number: 201110281520.0, publication number: CN102328037A) public affairs
Open a kind of chamfered crystallizer with taper continuous casting plate blank, the relative narrow copper plate of two relatively wide copper coins and two be assembled in one
Rising and constitute, narrow copper plate inner surface is circular arc camber or plane to the fillet surface of wide face copper coin inner surface transition, fillet surface from
Crystallizer is suitable for reading has nature back draught to end opening；The angle that narrow copper plate two ends are formed with wide copper coin is 90 °, and two ends are fallen
The berm width of edged surface is 0～6mm；Fillet surface carries tapered.But, existing chamfer crystallizer technical scheme does not all have
There is the tapering homogeneity question considering chamfered part, there is copper coin corner and intermediate straight portion shrinks inconsistence problems, its
The upper and lower opening chamfer site width in copper coin corner is identical, i.e. the tapering of chamfer site is 0, and chamfered part does not shrinks, all of
Shrinking and all concentrate on middle straight line segment position, the upper and lower opening tapering causing middle straight line segment position is excessive.Copper plate of crystallizer falls
Angular position tapering is not enough, easily makes to produce between plate blank chamfering position and copper plate of crystallizer air gap, causes heat transfer and green shell raw
Length is uneven and causes slab lobe；Especially when chamfering inclined-plane is bigger, do not consider the solidification shrinkage of crystallizer chamfer site,
Inevitably resulting in chamfer site cooling effect poor, make the strand in crystallizer to crack, this is also with big chamfering
Mould at narrow copper coin technology is the major obstacle of application in heavy slab produces.
Summary of the invention
It is an object of the invention to provide a kind of band chamfering plate slab crystallizer narrow limit copper coin having and shrinking consistent curve form,
To solve the copper coin corner in prior art and intermediate straight portion contraction inconsistence problems, effectively to make up fillet surface
Contraction, the solidification shrinkage making chamfer crystallizer whole narrow limit green shell is uniform, thus more effectively eliminates strand corner and split
Stricture of vagina defect.
The present invention solves above-mentioned technical problem and be the technical scheme is that
A kind of have the plate slab crystallizer narrow limit copper coin shrinking consistent curve form, and its external shape is up big and down small trapezoidal,
With chamfered region, the back side of copper coin, there is Forced water cooling structure with the work surface left and right sides of steel contacts, it is characterised in that:
Described work surface is up big and down small curved surface, the chamfered region symmetrical with centrage by mid-plane district CDdc and both sides
ABCcba and DEFfed seamlessly transits composition；
The contour curve ABCDEF suitable for reading of described narrow limit copper coin is by straight line CD suitable for reading, the suitable for reading oblique line AB symmetrical with centrage
And EF, the camber line BC suitable for reading that two ends are tangent with oblique line AB suitable for reading and straight line CD suitable for reading respectively, and two ends are respectively with suitable for reading
Camber line DE suitable for reading composition tangent for straight line CD and oblique line EF suitable for reading；
The end opening contour curve abcdef of described narrow limit copper coin is by end opening straight line cd, the end opening oblique line ab symmetrical with centrage
And ef, the end opening camber line bc that two ends are tangent with end opening oblique line ab and end opening straight line cd respectively, and two ends respectively with end opening
End opening camber line de composition tangent for straight line cd and end opening oblique line ef；
The each line segment of contour curve ABCDEF suitable for reading of described narrow limit copper coin is corresponding to the end opening each line segment of contour curve abcdef
Shrinkage factor is completely the same, i.e. Sq=Sx=Sh=Sz, and wherein, Sq is that contour curve ABCDEF suitable for reading takes turns corresponding to end opening
The total shrinkage of wide curve abcdef, Sx is oblique line AB, EF suitable for reading shrinkage factor corresponding to end opening oblique line ab, ef；Sh is
Camber line BC, DE suitable for reading are corresponding to the shrinkage factor of end opening camber line bc, de；Sz is that straight line CD suitable for reading is corresponding to end opening straight line cd
Shrinkage factor.
The one preferably technical scheme with the plate slab crystallizer narrow limit copper coin shrinking consistent curve form of the present invention, its
The shape being characterised by described contour curve ABCDEF suitable for reading and end opening contour curve abcdef is to determine according to following rule
:
It is first depending on the condensation shrinkage characteristics of strand, determines the straight line CD suitable for reading shrinkage factor Sz corresponding to end opening straight line cd,
Determine the difference of the length of straight line CD suitable for reading and end opening straight line cd；
Then, according to the principle that shrinkage factor is consistent, make Sh=Sz, determine camber line BC, DE suitable for reading and end opening camber line bc, de
Arc length, the radius R and the radius r of end opening camber line bc, de of camber line BC, DE camber line suitable for reading, and the center of circle of each camber line
Coordinate；
Finally, make Sx=Sz, in conjunction with upper and lower opening oblique line AB, EF and ab, ef and upper and lower opening camber line BC, DE and bc,
The constraints that de is tangent, determines upper and lower opening oblique line AB, EF and ab, the length of ef, and the inclination angle of upper and lower opening oblique line
U and v.
A kind of superior technique scheme with the plate slab crystallizer narrow limit copper coin shrinking consistent curve form of the present invention, its
It is characterised by that the working curved surface of described plate slab crystallizer narrow limit copper coin is formed according in the following manner:
Oblique line AB, EF suitable for reading are connected, in oblique line AB, EF suitable for reading with the corresponding end points straight line of end opening oblique line ab, ef
Between each point, the some straight line the most corresponding with end opening oblique line ab, ef be connected；
Camber line BC, DE suitable for reading are connected, in camber line BC, DE suitable for reading with the corresponding end points straight line of end opening camber line bc, de
Between each point, the some straight line the most corresponding with end opening camber line bc, de be connected；
The corresponding end points straight line of straight line CD suitable for reading and end opening straight line cd be connected, the middle each point of straight line CD suitable for reading, with under
Point corresponding in proportion for mouth straight line cd is connected with straight line；
Be connected to the connecting line of end opening contour curve each corresponding point of abcdef from contour curve ABCDEF suitable for reading, formed by
Transition plane to end opening suitable for reading, described transition plane is rendered as linear seamlessly transitting on any longitudinal profile,
Constitute and there is the inverted cone molten steel work surface shrinking consistent curve form.
A kind of preferably technical scheme with the plate slab crystallizer narrow limit copper coin shrinking consistent curve form of the present invention, its
It is characterised by that described contour curve ABCDEF suitable for reading corresponding to total Sg span of shrinking of end opening contour curve abcdef is
0.5～2.0%.
A kind of technical scheme of the improvement with the plate slab crystallizer narrow limit copper coin shrinking consistent curve form of the present invention, its
It is characterised by the cross section on arbitrary height, oblique line AB, EF suitable for reading of copper coin chamfered region, described narrow limit and straight line suitable for reading
The angle U of CD is 15～75 °, and end opening oblique line ab, ef are 15～75 ° with the angle v of end opening straight line cd；Described narrow
Chamfer height AK and ak of limit copper coin is 15～60mm, and length KC of each chamfering, kc are the width of plate slab cast
10～50%.
A kind of technical side of the further improvement with the plate slab crystallizer narrow limit copper coin shrinking consistent curve form of the present invention
Case, it is characterised in that described narrow limit copper coin is applicable to straight mo(u)ld and curved mould, its camber line BC, DE suitable for reading and end opening
Arc radius R and r of camber line bc, de is 15～120mm.
The invention has the beneficial effects as follows:
The present invention has the plate slab crystallizer narrow limit copper coin shrinking consistent curve form, and making cross section, strand corner is curved circular
Angle and obtuse angle, it is ensured that strand corner and middle gains in depth of comprehension more uniform temperature；Mould at narrow copper coin chamfer site formed with in
Between tapering corresponding to plane position, chamfer site possesses contraction concordance with the curve form at mid-plane position, makes crystallization
The molten steel solidification speed at the copper coin mid-plane position, molten steel solidification speed limit each with crystallizer surrounding of device chamfer site is close,
Thus ensure that the casting blank shell thickness on whole section is close, strand shrink uniformity, it is to avoid microalloying peritectic steel and
The strand transverse corner crack stricture of vagina of hypo-peritectic steel produces, and can effectively solve corner bleed-out accident during continuous casting, solve crystallization simultaneously
Device corner portion continuous casting covering slag is to flowing into not enough problem between copper coin and green shell, the skin that sticks up eliminating hot rolled plate edge surface lacks
Fall into.
Accompanying drawing explanation
Fig. 1 is the structural representation with the plate slab crystallizer narrow limit copper coin shrinking consistent curve form of the present invention；
Fig. 2 is the schematic rear view with the plate slab crystallizer narrow limit copper coin shrinking consistent curve form of the present invention；
Fig. 3 is the contour curve schematic diagram suitable for reading of the plate slab crystallizer narrow limit copper coin having and shrinking consistent curve form；
Fig. 4 is the end opening contour curve schematic diagram of the plate slab crystallizer narrow limit copper coin having and shrinking consistent curve form.
In figure, 1-work surface, 2-is suitable for reading, 3-end opening, the 4-back side；HG, hg are respectively trapezoidal narrow limit copper coin upper and lower opening
Width；CD, cd are respectively the upper and lower opening straight line (and length) of working curved surface, and CDdc is the mid-plane of working curved surface
District；AB, EF, ab, ef are respectively the chamfering oblique line (and length) of working curved surface upper and lower opening, AB, EF and ab, ef
Symmetrical respectively about narrow limit copper coin centrage；U is the angle of oblique line AB suitable for reading and straight line CD suitable for reading, and v is end opening oblique line ab
Angle with end opening straight line cd；BC, DE, bc, de are respectively the upper and lower opening camber line (and arc length) of working curved surface, BC,
DE and bc, de are symmetrical respectively about narrow limit copper coin centrage；O, o are respectively the center of circle of upper and lower opening camber line BC and bc；R、
R is respectively upper and lower opening camber line BC, DE and bc, the radius of de；AK, ak are respectively the chamfer height of upper and lower opening；KC、
Kc is respectively the chamfering length of upper and lower opening.
Detailed description of the invention
For better understanding of the technique scheme of the present invention, carry out the most detailed with embodiment below in conjunction with the accompanying drawings
Thin description.
As depicted in figs. 1 and 2, the present invention's has the plate slab crystallizer narrow limit copper coin shrinking consistent curve form, outside it
Portion is shaped as up big and down small trapezoidal, with work surface 1 left and right sides of steel contacts with chamfered region, the back side 4 of copper coin
There is Forced water cooling structure；As depicted in figs. 1 and 2,
Described work surface 1 is up big and down small curved surface, the chamfering symmetrical with centrage by mid-plane district CDdc and both sides
District ABCcba and DEFfed seamlessly transits composition；
The contour curve ABCDEF suitable for reading of described narrow limit copper coin is by straight line CD suitable for reading, the suitable for reading oblique line AB symmetrical with centrage
And EF, the camber line BC suitable for reading that two ends are tangent with oblique line AB suitable for reading and straight line CD suitable for reading respectively, and two ends are respectively with suitable for reading
Camber line DE suitable for reading tangent for straight line CD and oblique line EF suitable for reading forms (seeing Fig. 3)；
The end opening contour curve abcdef of described narrow limit copper coin is by end opening straight line cd, the end opening oblique line ab symmetrical with centrage
And ef, the end opening camber line bc that two ends are tangent with end opening oblique line ab and end opening straight line cd respectively, and two ends respectively with end opening
End opening camber line de tangent for straight line cd and end opening oblique line ef forms (seeing Fig. 4)；
The each line segment of contour curve ABCDEF suitable for reading of described narrow limit copper coin is corresponding to the end opening each line segment of contour curve abcdef
Shrinkage factor is completely the same, i.e. Sq=Sx=Sh=Sz, and wherein, Sq is that contour curve ABCDEF suitable for reading takes turns corresponding to end opening
The total shrinkage of wide curve abcdef, it is defined as
Sx is oblique line AB, EF suitable for reading shrinkage factor corresponding to end opening oblique line ab, ef, and it is defined as
Sh is camber line BC, DE suitable for reading shrinkage factor corresponding to end opening camber line bc, de, and it is defined as
Sz is the straight line CD suitable for reading shrinkage factor corresponding to end opening straight line cd, and it is defined as
Strand condenses contraction in casting cycle, it is possible to departs from crystallizer inwall and produces air gap.Owing to air gap has greatly
Thermal resistance, make the heat conductivility of crystallizer be deteriorated, casting blank shell is thinning, even causes drawing crack bleed-out.In order to prevent bleedout,
The bottom size inverted cone less than size suitable for reading made by crystallizer, to reduce the air gap between inwall and green shell, increases crystallizer
The capacity of heat transmission, shell thickness when using crystallizer increases, and can improve casting speed.The back draught of plate slab crystallizer,
The each line segment of contour curve ABCDEF suitable for reading of the narrowest limit copper coin is corresponding to the receipts of the end opening each line segment of contour curve abcdef
Shrinkage, be based on strand condenses what shrinkage characteristics determined.
According to an embodiment with the plate slab crystallizer narrow limit copper coin shrinking consistent curve form of the present invention, described on
The shape of mouth contour curve ABCDEF and end opening contour curve abcdef determines according to following rule:
It is first depending on the condensation shrinkage characteristics of strand, determines the straight line CD suitable for reading shrinkage factor Sz corresponding to end opening straight line cd,
Determine the difference of the length of straight line CD suitable for reading and end opening straight line cd；
Then, according to the principle that shrinkage factor is consistent, make Sh=Sz, determine camber line BC, DE suitable for reading and end opening camber line bc, de
Arc length, the radius R and the radius r of end opening camber line bc, de of camber line BC, DE camber line suitable for reading, and the center of circle of each camber line
Coordinate；
Finally, make Sx=Sz, in conjunction with upper and lower opening oblique line AB, EF and ab, ef and upper and lower opening camber line BC, DE and bc,
The constraints that de is tangent, determines upper and lower opening oblique line AB, EF and ab, the length of ef, and the inclination angle of upper and lower opening oblique line
U and v.
According to an embodiment with the plate slab crystallizer narrow limit copper coin shrinking consistent curve form of the present invention, described narrow
The contour curve ABCDEF suitable for reading of limit copper coin seamlessly transits to end opening contour curve abcdef, and its easement curve is the most longitudinally
Linear seamlessly transitting it is rendered as on section；The working curved surface of described plate slab crystallizer narrow limit copper coin is according in the following manner shape
Become:
Oblique line AB, EF suitable for reading are connected, in oblique line AB, EF suitable for reading with the corresponding end points straight line of end opening oblique line ab, ef
Between each point, the some straight line the most corresponding with end opening oblique line ab, ef be connected；
Camber line BC, DE suitable for reading are connected, in camber line BC, DE suitable for reading with the corresponding end points straight line of end opening camber line bc, de
Between each point, the some straight line the most corresponding with end opening camber line bc, de be connected；
The corresponding end points straight line of straight line CD suitable for reading and end opening straight line cd is connected, and the middle each point of straight line CD suitable for reading, with end opening
Point corresponding in proportion for straight line cd straight line is connected；
From contour curve ABCDEF suitable for reading to the connecting line of end opening contour curve each corresponding point of abcdef, formed by suitable for reading to
The transition plane of end opening, described transition plane is rendered as linear seamlessly transitting on any longitudinal profile, constitutes tool
There is the inverted cone molten steel work surface 1 shrinking consistent curve form.
According to an embodiment with the plate slab crystallizer narrow limit copper coin shrinking consistent curve form of the present invention, described on
Mouth contour curve ABCDEF is than end opening contour curve abcdef long 0.5～2.0%, say, that described contour curve suitable for reading
ABCDEF is 0.5～2.0% corresponding to total Sg span of shrinking of end opening contour curve abcdef.
According to an embodiment with the plate slab crystallizer narrow limit copper coin shrinking consistent curve form of the present invention, arbitrarily
In cross section on height, oblique line AB, EF suitable for reading of copper coin chamfered region, described narrow limit with the angle U of straight line CD suitable for reading are
15～75 °, end opening oblique line ab, ef are 15～75 ° with the angle v of end opening straight line cd；The chamfer height of described narrow limit copper coin
AK and ak is 15～60mm, length KC of each chamfering, kc by cast the 10～50% of width of plate slab.
According to an embodiment with the plate slab crystallizer narrow limit copper coin shrinking consistent curve form of the present invention, described narrow
Limit copper coin is applicable to straight mo(u)ld and curved mould, its camber line BC, DE suitable for reading and the arc radius of end opening camber line bc, de
R and r is 15～120mm.
Embodiment
The main ginseng of one specific embodiment with the plate slab crystallizer narrow limit copper coin shrinking consistent curve form of the present invention
Number is as follows:
The width HG suitable for reading of trapezoidal narrow limit copper coin is 313.6mm, and end opening width hg is 311.0mm；Copper coin mid portion
Thickness HK=hk=39mm；The a length of 157.27mm of straight line CD suitable for reading, a length of 155.96mm of end opening straight line cd；
The arc length of camber line BC and DE suitable for reading is 35.28mm, and the distance=arc radius of center of circle O and straight line CD is 60mm, center of circle O
It is 78.17mm with the distance of straight line AKH；The arc length of end opening camber line bc and de is 34.99mm's, center of circle o and straight line cd
Distance=arc radius is 59.50mm, and the distance of center of circle o and straight line akh is 78.17mm；The length of oblique line AB and EF suitable for reading
Angle for 53.94mm, oblique line AB suitable for reading and straight line CD suitable for reading is 33.69 °；End opening oblique line ab's and ef is a length of
The angle of 53.50mm, end opening oblique line ab and end opening straight line cd is 33.69 °.Can calculate, oblique line AB, EF suitable for reading correspond to
Shrinkage factor Sx of end opening oblique line ab, ef, camber line BC, DE suitable for reading are corresponding to shrinkage factor Sh of end opening camber line bc, de, suitable for reading
Straight line CD is corresponding to shrinkage factor Sz of end opening straight line cd, and contour curve ABCDEF suitable for reading is corresponding to end opening contour curve
The total shrinkage Sq of abcdef is completely the same, i.e. Sx=Sh=Sz=Sq=0.836%.
Those of ordinary skill in the art is it should be appreciated that above embodiment is intended merely to illustrate the skill of the present invention
Art scheme, and it is not used as limitation of the invention, any connotation based on the present invention is to embodiment described above
The change made, modification, all will fall in the scope of the claims of the present invention.
Claims (6)
1. having the plate slab crystallizer narrow limit copper coin shrinking consistent curve form, its external shape is up big and down small ladder
Shape, has Forced water cooling structure with the work surface left and right sides of steel contacts with chamfered region, the back side of copper coin, its
It is characterised by:
Described work surface is up big and down small curved surface, the chamfering symmetrical with centrage by mid-plane district CDdc and both sides
District ABCcba and DEFfed seamlessly transits composition；
The contour curve ABCDEF suitable for reading of described narrow limit copper coin is by straight line CD suitable for reading, the suitable for reading oblique line symmetrical with centrage
AB and EF, the camber line BC suitable for reading that two ends are tangent with oblique line AB suitable for reading and straight line CD suitable for reading respectively, and two ends
Camber line DE suitable for reading composition tangent with straight line CD suitable for reading and oblique line EF suitable for reading respectively；
The end opening contour curve abcdef of described narrow limit copper coin is by end opening straight line cd, the end opening oblique line ab symmetrical with centrage
And ef, the end opening camber line bc that two ends are tangent with end opening oblique line ab and end opening straight line cd respectively, and two ends respectively with
End opening camber line de composition tangent for end opening straight line cd and end opening oblique line ef；
The each line segment of contour curve ABCDEF suitable for reading of described narrow limit copper coin corresponds to the end opening each line segment of contour curve abcdef
Shrinkage factor completely the same, i.e. Sq=Sx=Sh=Sz, wherein, Sq is that contour curve ABCDEF suitable for reading is corresponding
In the total shrinkage of end opening contour curve abcdef, Sx be oblique line AB, EF suitable for reading corresponding to end opening oblique line ab,
The shrinkage factor of ef；Sh is camber line BC, DE suitable for reading shrinkage factor corresponding to end opening camber line bc, de；Sz is suitable for reading
Straight line CD is corresponding to the shrinkage factor of end opening straight line cd.
The most according to claim 1 have the plate slab crystallizer narrow limit copper coin shrinking consistent curve form, it is characterised in that
The shape of described contour curve ABCDEF suitable for reading and end opening contour curve abcdef determines according to following rule:
It is first depending on the condensation shrinkage characteristics of strand, determines the straight line CD suitable for reading shrinkage factor Sz corresponding to end opening straight line cd,
Determine the difference of the length of straight line CD suitable for reading and end opening straight line cd；
Then, according to the principle that shrinkage factor is consistent, make Sh=Sz, determine camber line BC, DE suitable for reading and end opening camber line bc,
The arc length of de, the radius R and the radius r of end opening camber line bc, de of camber line BC, DE camber line suitable for reading, and each arc
The central coordinate of circle of line；
Finally, make Sx=Sz, in conjunction with upper and lower opening oblique line AB, EF and ab, ef and upper and lower opening camber line BC, DE and
The constraints that bc, de are tangent, determines upper and lower opening oblique line AB, EF and ab, the length of ef, and upper and lower opening is oblique
Inclination angle U and v of line.
The most according to claim 1 have the plate slab crystallizer narrow limit copper coin shrinking consistent curve form, it is characterised in that
The working curved surface of described plate slab crystallizer narrow limit copper coin is formed according in the following manner:
Oblique line AB, EF suitable for reading are connected with the corresponding end points straight line of end opening oblique line ab, ef, oblique line AB, EF's suitable for reading
Middle each point, the some straight line the most corresponding with end opening oblique line ab, ef is connected；
Camber line BC, DE suitable for reading are connected with the corresponding end points straight line of end opening camber line bc, de, camber line BC, DE suitable for reading
Middle each point, the some straight line the most corresponding with end opening camber line bc, de be connected；
The corresponding end points straight line of straight line CD suitable for reading and end opening straight line cd is connected, the middle each point of straight line CD suitable for reading, with
Point corresponding in proportion for end opening straight line cd straight line is connected；
It is connected to the connecting line of end opening contour curve each corresponding point of abcdef from contour curve ABCDEF suitable for reading, is formed
By the transition plane to end opening suitable for reading, described transition plane is rendered as linear smooth on any longitudinal profile
Transition, constitutes and has the inverted cone molten steel work surface shrinking consistent curve form.
4. the plate slab crystallizer narrow limit copper coin of consistent curve form is shunk according to having described in claim 1,2 or 3, its
It is characterised by that described contour curve ABCDEF suitable for reading shrinks Sg value corresponding to the total of end opening contour curve abcdef
Scope is 0.5～2.0%.
5. the plate slab crystallizer narrow limit copper coin of consistent curve form is shunk according to having described in claim 1,2 or 3, its
Being characterised by the cross section on arbitrary height, oblique line AB, EF suitable for reading of copper coin chamfered region, described narrow limit are with upper
The angle U of mouthful straight line CD is 15～75 °, the angle v of end opening oblique line ab, ef and end opening straight line cd be 15～
75°；Chamfer height AK and ak of described narrow limit copper coin is 15～60mm, length KC of each chamfering, kc
By cast the 10～50% of width of plate slab.
6. the plate slab crystallizer narrow limit copper coin of consistent curve form is shunk according to having described in claim 1,2 or 3, its
It is characterised by that described narrow limit copper coin is applicable to straight mo(u)ld and curved mould, its camber line BC, DE suitable for reading and end opening
Arc radius R and r of camber line bc, de is 15～120mm.
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| CN201510091747.7A CN105983666A (en) | 2015-02-28 | 2015-02-28 | Slab crystallizer narrow-side cooper plate with curved surface profile consistent in shrinking |
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| CN201510091747.7A CN105983666A (en) | 2015-02-28 | 2015-02-28 | Slab crystallizer narrow-side cooper plate with curved surface profile consistent in shrinking |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109382493A (en) * | 2018-11-28 | 2019-02-26 | 攀钢集团攀枝花钢铁研究院有限公司 | A method of improving hot rolling acid-cleaning plate peeling defect |
| CN109570461A (en) * | 2017-09-28 | 2019-04-05 | 上海梅山钢铁股份有限公司 | A kind of device of full bow type continuous casting machine manufacture chamfering slab |
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| CN203621418U (en) * | 2013-12-06 | 2014-06-04 | 钢铁研究总院 | Combined type crystallizer narrow-edge copper plate capable of continuously changing cross section shapes |
| CN104209484A (en) * | 2014-09-15 | 2014-12-17 | 首钢总公司 | Narrow-face copper plate for chamfer crystallizer |
| CN204035495U (en) * | 2014-08-18 | 2014-12-24 | 钢铁研究总院 | A kind of narrow face copper plate of crystallizer controlling chamfering base inclined-plane depression |
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| JPS6192756A (en) * | 1984-10-12 | 1986-05-10 | Sumitomo Metal Ind Ltd | Continuous casting method of preventing surface cracking of ingot and casting mold |
| CN202146982U (en) * | 2011-05-03 | 2012-02-22 | 钢铁研究总院 | Chamber crystallizer narrow-surface copper plate with a combined cooling water channel |
| CN102642000A (en) * | 2012-05-08 | 2012-08-22 | 首钢总公司 | Slab continuous casting chamfer crystallizer narrow-face copper plate capable of effectively controlling longitudinal cracks of corners |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109570461A (en) * | 2017-09-28 | 2019-04-05 | 上海梅山钢铁股份有限公司 | A kind of device of full bow type continuous casting machine manufacture chamfering slab |
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| CN109382493B (en) * | 2018-11-28 | 2021-03-16 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for improving peeling defect of hot-rolled pickled plate |
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