CN108526423A - A kind of method, control method and device of slab quality improving casting process solidification middle and later periods solid-liquid two-phase region mobility - Google Patents
A kind of method, control method and device of slab quality improving casting process solidification middle and later periods solid-liquid two-phase region mobility Download PDFInfo
- Publication number
- CN108526423A CN108526423A CN201810268564.1A CN201810268564A CN108526423A CN 108526423 A CN108526423 A CN 108526423A CN 201810268564 A CN201810268564 A CN 201810268564A CN 108526423 A CN108526423 A CN 108526423A
- Authority
- CN
- China
- Prior art keywords
- exciting force
- solidification
- continuous casting
- shell surface
- green shell
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
- B22D11/11—Treating the molten metal
- B22D11/114—Treating the molten metal by using agitating or vibrating means
-
- 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
- B22D11/16—Controlling or regulating processes or operations
- B22D11/20—Controlling or regulating processes or operations for removing cast stock
- B22D11/201—Controlling or regulating processes or operations for removing cast stock responsive to molten metal level or slag level
- B22D11/205—Controlling or regulating processes or operations for removing cast stock responsive to molten metal level or slag level by using electric, magnetic, sonic or ultrasonic means
-
- 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
- B22D11/16—Controlling or regulating processes or operations
-
- 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
- B22D11/16—Controlling or regulating processes or operations
- B22D11/20—Controlling or regulating processes or operations for removing cast stock
- B22D11/207—Controlling or regulating processes or operations for removing cast stock responsive to thickness of solidified shell
-
- 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
- B22D11/16—Controlling or regulating processes or operations
- B22D11/22—Controlling or regulating processes or operations for cooling cast stock or mould
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
Abstract
The invention discloses method, the control method and device of slab quality that a kind of improvement casting process solidifies middle and later periods solid-liquid two-phase region mobility, belong to metallurgical continuous casting technical field.The present invention's applies intermittent exciting force on the green shell surface of continuous casting billet solidifying end, using the positive thixotropy of solid-liquid two-phase metal, improves feeding capacity of the half solidification molten steel in the solidification middle and later periods, it is loose to improve casting blank inner organization；In addition the green shell surface for stage casing being solidified in continuous casting billet solidifying end and continuous casting billet applies intermittent exciting force respectively；The exciting force for solidifying the green shell surface in stage casing in continuous casting billet is hit, the dendrite head that solidification front is grown in cooling procedure can be regularly interrupted, promote the growth of equiax crystal；And feeding capacity of the half solidification molten steel in the solidification middle and later periods can be improved in the exciting force on the green shell surface of continuous casting billet solidifying end in strike, improvement casting blank inner organization is loose, improves slab quality.
Description
Technical field
The present invention relates to metallurgical continuous casting technical fields, solidify the middle and later periods more specifically to a kind of improvement casting process
The control method of slab quality during the method and continuous casting and solidifying of solid-liquid two-phase region mobility.
Background technology
The concrete technology of continuous casting is molten steel constantly by water mold, is connected from crystallizer lower exit port after congealing into hard shell
It is continuous to pull out, through water-spraying control, the foundry technology process of blank is all cut into after solidification.When continuous casting of iron and steel produces, due to solidification
The process middle and later periods, with the increase of two-phase section solid phase ratio, the viscosity of molten steel increases, mobility is deteriorated, it is difficult to it is solidifying to supplement molten steel
Gu when the cavity that is formed in solidification end due to volume contraction, then form the loose of solidified structure.Due to the solidification shrinkage of steel
Rate is significantly greater than the non-ferrous metals such as copper, aluminium, and thermal coefficient is far below copper and aluminium, therefore is easier the solidification end in strand
Form center porosity.To solve the above-mentioned problems, many patents and technology are formd in this aspect for a long time, these patents and
Technology is broadly divided into three classes：When with solidification end electromagnetic agitating technology, second is that solidification end pressure or rolling casting technology, last
Kind is to mold casting technique with mechanical oscillation.This three types of technology has been employed in modern steel Foundry Production, but existing
Technique is difficult to effectively improve the loose problem of continuous casting billet structure so that the properties of steel deteriorate.
In addition, in continuous casting production process, to improve the consolidated structure of strand, equiaxial crystal ratio is improved, reduces strand center
The loose and component segregation in region, it is widely used that outfield force stirring technique is applied to be typical with electromagnetic agitation.But electromagnetism stirs
It mixes due to persistently applying constant or alternating electromagnetic force to liquid metal, it is brilliant to become Center Equiaxial Crystal in the dendrite head of the disconnected column crystal of brush
While core, also so that relative motion persistently occurs for the dendrite of liquid metal and solidification front, cause solute element constantly to liquid
Transfer in state metal causes to continue serious macroscopical negative segregation inside the strand of the outfield force zone of action, such as in continuous casting steel machine
Strand white band.Urgent need overcomes the technical problem.
Through retrieval, has correlation similar techniques and disclose.Such as：A kind of continuous casting blooms based on end electromagnetic agitation are gently pressed
Lower technique (publication number：CN103121092A；Publication date：2013.05.29), which is mounted in end electromagnetic stirring device
After two cold-zones, the air cooling zone before aligning, it is ensured that when slighter compress and aligning are carried out at the same time, the liquid phase between column crystal is complete
Full solidification, the technology can improve the internal soundness of steel.In addition, a kind of bloom continuous
(publication number：CN101648263A；Publication date：2010.02.17), in Continuous Casting Soft Reduction region, pass through strand center solid rate fs
Variation control drafts, and give the relationship of slighter compress rack drafts and strand center solid rate；Cord can be mitigated
Steel center segregation of casting blank, and improve the center porosity and central pipe of cord steel strand.In addition, a kind of raising continuous casting billet quality
Method and vibration support roller device (publication number CN1586767A；Publication date 2005.03.02), by being tightly attached to outside continuous casting green shell
The vibration support roller of wall is done under the driving of vibroseis while keeping rotating with continuous casting billet surface synchronization perpendicular to strand thickness
Degree direction or the vibrations for being parallel to throwing direction, and this vibrations are transferred to by the solidified shell with wick-containing by contact；The technology
By vibration support roller device come improve continuous casting billet Center Equiaxial Crystal rate with reach be obviously improved continuous casting billet central pipe and it is loose,
It reduces segregation and effectively prevents generating using the rolling crack caused by solidification end slighter compress.
Invention content
1. technical problems to be solved by the inivention
It is an object of the invention to improve the loose problem of continuous casting billet structure, and then improve slab quality；
A kind of method of the improvement casting process solidification middle and later periods solid-liquid two-phase region mobility provided solidifies end in continuous casting billet
The green shell surface at end applies intermittent exciting force, using the positive thixotropy of solid-liquid two-phase metal, improves half solidification molten steel solidifying
Gu the feeding capacity of middle and later periods, improvement casting blank inner organization is loose, improves slab quality；
The control method and device of slab quality during a kind of continuous casting and solidifying provided in continuous casting billet solidifying end and are coagulated
Gu the green shell surface in stage casing applies intermittent exciting force respectively, the exciting that the green shell surface in stage casing is solidified in continuous casting billet is hit
Power can regularly interrupt the dendrite head that solidification front is grown in cooling procedure so that column crystal is converted into the mistake of equiax crystal
Journey promotes the growth of equiax crystal；And strike utilizes solid-liquid two-phase metal in the exciting force on the green shell surface of continuous casting billet solidifying end
Positive thixotropy, improve feeding capacity of the half solidification molten steel in the solidification middle and later periods, and then improve slab quality.
2. technical solution
In order to achieve the above objectives, technical solution provided by the invention is：
A kind of method of improvement casting process solidification middle and later periods solid-liquid two-phase region mobility of the present invention, solidifies in continuous casting billet
The green shell surface of end applies intermittent exciting force, and the strand cross section metal liquid fraction of wherein continuous casting billet solidifying end is
b1, and 25% >=b1>0。
Preferably, the time interval that the exciting force on solidification end green shell surface applies is t1, t1=0.0167~2s.
Preferably, the impact energy ranging from W that the exciting force on solidification end green shell surface applies1, W1=15~1500J.
Preferably, the impact energy for applying exciting force on the green shell surface of continuous casting billet solidifying end is W1,
a1Value range is 0.2~1.0J/mm3,
b1For metal liquid fraction/% of the strand lateral cross section of solidification end exciting force point of application position；
C1Value range is 2.7~3.3；
S is casting blank section area/mm2。
The control method of slab quality during a kind of continuous casting and solidifying of the present invention, in continuous casting billet solidifying end and continuous casting billet
The green shell surface in solidification stage casing applies intermittent exciting force respectively；And the green shell surface of continuous casting billet solidifying end applies exciting force
Time interval be less than continuous casting billet solidification stage casing green shell surface apply exciting force time interval；Wherein continuous casting billet solidifying end
Strand cross section metal liquid fraction be b1, and 25% >=b1>0；Continuous casting billet solidification stage casing strand cross section metal liquid fraction be
b2, and 75% >=b2>25%.
Preferably, the time interval that the green shell surface of solidification end applies exciting force is t1, t1=0.0167~2s, or/and
The green shell surface for solidifying stage casing applies the time interval of exciting force as t2, t2=1-30s.
Preferably, the green shell surface of solidification end applies the impact energy ranging from W of exciting force1, W1=15~1500J；Or/
Apply the impact energy ranging from W of exciting force with the green shell surface in solidification stage casing2, W2=10~800J.
Preferably, the impact energy for applying exciting force on the green shell surface of continuous casting billet solidifying end is W1,
a1Value range is 0.2~1.0J/mm3,
b1For metal liquid fraction/% of the strand lateral cross section of solidification end exciting force point of application position；
C1Value range is 2.7~3.3；
S is casting blank section area/mm2。
Preferably, the green shell surface that stage casing is solidified in continuous casting billet applies the impact energy of exciting force as W2,
a2Value range is 0.2~2.6J/mm3,
b2For metal liquid fraction/% of the strand lateral cross section of solidification stage casing exciting force point of application position；
C2Value range is 1.8~2.4；
S is casting blank section area/mm2。
Preferably, the green shell surface for solidifying stage casing applies the time interval of exciting force as t2,
t2=ε × b2 τ×S
ε value ranges are 0.4~0.8s/mm2；
b2For metal solid rate/% in continuous casting billet lateral cross section at active position；
τ value ranges are 1.4~2.0；
S is casting blank section area/mm2。
The control device of slab quality during a kind of continuous casting and solidifying of the present invention is 25% in continuous casting billet metal liquid fraction
≥b1>It is provided with end exciting force bringing device at 0 position, and is 75% >=b in continuous casting billet metal liquid fraction2>25%
Stage casing exciting force bringing device is provided at position, end exciting force bringing device and stage casing exciting force bringing device are respectively used to
For applying intermittent exciting force to green shell surface.
3. advantageous effect
Using technical solution provided by the invention, compared with existing known technology, there is following remarkable result：
(1) method of a kind of improvement casting process of the invention solidification middle and later periods solid-liquid two-phase region mobility, in continuous casting billet
The green shell surface of solidification end applies intermittent exciting force, and the strand cross section metal liquid fraction of continuous casting billet solidifying end is 0
~25%, exciting force is transmitted to strand core by green shell, makes half solidification molten steel under the action of shear stress, because of positive thixotropy
So that viscosity declines and mobility improves, under the conditions of molten steel high-head and solidification shrinkage are sucked by vacuum, half solidifies molten steel feeding
Ability enhances, and to using the positive thixotropy of solid-liquid two-phase metal, improve half mobility for solidifying molten steel, improves half solidification molten steel
In the feeding capacity of solidification middle and later periods, improvement casting blank inner organization is loose, improves slab quality；
(2) method of a kind of improvement casting process of the invention solidification middle and later periods solid-liquid two-phase region mobility, solidification end
The time interval that the exciting force on green shell surface applies is t1=0.0167~2s, when continuous casting, to solidification end strand appearance
Face applies continuous, quick exciting so that the effect of exciting force is transmitted to strand core, makes half solidification molten steel in shear stress
Under effect, because positive thixotropy so that viscosity declines and mobility improves, half solidifies the enhancing of molten steel feeding capacity, and then effectively changes
Kind casting blank inner organization is loose, improves slab quality；
(3) during a kind of continuous casting and solidifying of the invention slab quality control method, in continuous casting billet solidifying end and solidifying
Gu the green shell surface in stage casing applies intermittent exciting force respectively, the exciting that the green shell surface in stage casing is solidified in continuous casting billet is hit
Power can regularly interrupt the dendrite head that solidification front is grown in cooling procedure, promote the growth of equiax crystal while not generate
Negative segregation；And strike is improved in the exciting force on continuous casting billet solidifying end green shell surface using the positive thixotropy of solid-liquid two-phase metal
Feeding capacity of the half solidification molten steel in the solidification middle and later periods improves half solidification molten steel in solidification while improving the production of equiax crystal
The feeding capacity in later stage, improvement casting blank inner organization is loose, improves slab quality；
(4) during a kind of continuous casting and solidifying of the invention slab quality control method, the green shell surface for solidifying stage casing is applied
It is 25%~85% to add the metal liquid fraction of the strand cross section at the point of application of intermittent exciting force so that solidified shell exists
While capable of bearing strike exciting force, the dendrite head that solidification front is grown can be interrupted, and promote the growth of equiax crystal.
Description of the drawings
Fig. 1 is that a kind of improvement casting process of the present invention solidifies the control device signal of middle and later periods solid-liquid two-phase region mobility
Figure；
Fig. 2 is the pattern schematic diagram of the round billet microstructure of embodiment 1；
Fig. 3 is the pattern schematic diagram of the round billet microstructure of comparative example 1；
Fig. 4 be embodiment 2 a kind of continuous casting and solidifying during slab quality control device structural schematic diagram；
Fig. 5 be embodiment 3 a kind of continuous casting and solidifying during slab quality control device structural schematic diagram；
Fig. 6 is the pattern schematic diagram of the round billet microstructure of embodiment 2.
Label declaration in schematic diagram：
100, continuous casting billet；110, molten steel is not solidified；120, solidified shell；101, strand concave arc side；102, strand convex arc side；
210, end exciting force bringing device；220, stage casing exciting force bringing device；
310, columnar zone；320, isometric crystalline region, 330, center porosity hole.
Specific implementation mode
To further appreciate that present disclosure, the present invention is described in detail in conjunction with the accompanying drawings and embodiments.
Structure, ratio, size depicted in this specification attached drawing etc., only to coordinate the revealed content of specification,
So that those skilled in the art understands and reads, the enforceable qualifications of the present invention are not limited to, therefore do not have technology
On essential meaning, the modification of any structure, the change of proportionate relationship or the adjustment of size can be generated not influencing the present invention
The effect of and the purpose that can reach under, should all still fall in the range of disclosed technology contents obtain and can cover.Together
When, cited such as "upper", "lower", "left", "right", " centre " term in this specification are merely convenient to the clear of narration,
Rather than to limit enforceable range, relativeness is altered or modified, in the case where changing technology contents without essence, when also regarding
For the enforceable scope of the present invention.
A kind of method of improvement casting process solidification middle and later periods solid-liquid two-phase region mobility of the present invention, continuous casting billet 100
Outside is solidified shell 120, and 120 inside of solidified shell is does not solidify molten steel 110, in the green shell table of 100 solidification end of continuous casting billet
Face applies intermittent exciting force, and the wherein strand cross section metal liquid fraction of 100 solidification end of continuous casting billet is b1, and 25% >=
b1>0, i.e. the exciting force of solidification end is applied to Coagulated hemothorax before to the section that metal liquid fraction is 25%；I.e. in continuous casting billet
100 metal liquid fractions are 25% >=b1>End exciting force bringing device 210 is provided at 0 position, end exciting force applies dress
210 are set for applying intermittent exciting force, the exciting force of end exciting force bringing device 210 to the green shell surface of solidification end
Force direction is perpendicular to green shell surface.Exciting force is required to act on the casting that metal liquid fraction in strand cross section is not more than 25%
Base surface, such hammer vibration energy can be played with useful effect in the mushy zone of solidification end and improve half solidification fluidity molten steel
Effect；When casting billet surface application of the metal liquid fraction more than 25% acts in strand cross section, the zone of influence can be along casting blank solidification
Body portion will cause the zone of influence because negative segregation occurs in sustained vibration to front transfer, simultaneously because vibration application position is excessively forward,
Cause vibrating effect to be difficult to influence solidification end below, does not have the effect for improving strand central tissue.It is worth explanation herein
, the exciting force and vibration applied herein is entirely different, is described as follows：
(1) exciting force and the mode of action of vibration are entirely different, wherein intermittent exciting force is that one way single is last to solidification
The impact or percussion on the green shell surface at end, strand itself do not have relative displacement；And vibration is the reciprocal shaking to strand,
Strand itself may will produce relative displacement, and vibrate that apply to casting blank shell surface is reciprocal active force, because around here
Having a rest property exciting force has the difference of essence with vibration；
(2) mechanism of action is entirely different, formally since exciting force and the mode of action of vibration are entirely different, while making two
Person is completely same to the mechanism of action of strand；The green shell surface in wherein solidification stage casing, which applies intermittent exciting force, to be passed through in moment
Solidified shell 120 is transmitted to strand core, makes half solidification molten steel under the action of shear stress, because positive thixotropy makes under viscosity
Drop and mobility improve, and improve the mobility for partly solidifying molten steel, improve half solidification molten steel in the feeding capacity for solidifying the middle and later periods；And
Vibration is to play feeding using inertia force and improve the loose problem of metal solidification texture, and vibration can additionally increase outfield force and draw
The molten steel risen and the interdendritic lasting relative displacement of solidification front, promote solute element in steel to be shifted into the liquid phase of steel, cause
The generation of strand negative segregation.
It is worth noting that：The excessive velocities of exciting force strike all will make the strike effect of exciting force transmit slowly excessively
It is bad.The time interval that the exciting force on the solidification end green shell surface of the present invention applies is t1, t1=0.0167~2s, so as to
To apply the exciting force of rapid strike on solidification end green shell surface.Wherein solidification end green shell surface exciting force apply when
Between between be divided into t1, t1=0.0167~2s, in solidification end since shell thickness caused by strand size is different, to make vibration make
It is transmitted to strand core with effective, the time interval that exciting force applies is 0.0167~2s, can play good exciting force and beat
Effect is hit, and exciting force is transmitted to strand core by green shell, makes half solidification molten steel under the action of shear stress, because of positive thixotroping
Property so that viscosity declines and mobility improves, and then improve half feeding capacity for solidifying molten steel.
In addition, the impact energy ranging from W that exciting force of the present invention on solidification end green shell surface applies1, W1=15~1500J.
Detailed description is：The impact energy range that external force is described in detail is related with casting blank section with active position (metal liquid fraction), even
The impact energy that the green shell surface of 100 solidification end of strand applies exciting force is W1,a1It takes
It is worth ranging from 0.2~1.0J/mm3, b1For the metal liquid phase of the strand lateral cross section of solidification end exciting force point of application position
Rate/%；C1Value range is 2.7~3.3；S is casting blank section area/mm2；With metal liquid fraction is lower in strand, section more
The ballistic work of big external force is bigger；In the exciting force of the appropriate impact energy of application on solidification end green shell surface, half solidified steel can be made
Water viscosity under the action of shear stress declines and mobility improves, and then improves half solidification molten steel feeding capacity.
When the impact energy of exciting force of the present invention is less than 15 joules, then strand mobility can not be effectively improved, it is difficult to effectively carry
Feeding capacity of the high half solidification molten steel in the solidification middle and later periods；If the impact energy of exciting force is more than 1500 joules, it is easy to draw
Play strand surface quality problems.In addition this patent further includes exciting force generating system, which includes：Energy resource supply device swashs
Power of shaking bringing device and excitation parameter regulation device, wherein exciting force producing method include electromagnetic drive, motor driving, fluid drive
It moves.
In addition, technical research team finds by long-term research and development, solidification end electromagnetic agitating technology, solidification end pressure
Or rolling casting technology and with mechanical oscillation molding casting technique have the following problems：
(1) it is that the typical principle for applying outfield force technology is with electromagnetic agitation：To solidify by applying magnetic fields
The dendrite in forward position is broken off and is crushed, and partly solidifies molten steel using magnetic field force stirring mushy zone two-phase.But due in casting blank solidification
End, for molten steel temperature close to solidus, solid phase ratio is gradually high, and the mobility of molten steel deteriorates, and feeding capacity is weak, loose to continuous casting billet structure
It is difficult to play improvement, almost can not find in practice and stablize effective case.
(2) the main function principle of solidification end pressure or rolling casting technology is by the way that strand, solidified shell 120 applies
Half interstice coverage that solidification state molten steel squeezes out solidification cave and extrusion solidification is shunk is reduced continuous casting billet structure and dredged by the pressure of some strength
Pine.But the technology has the following disadvantages：Need to increase that huge slighter compress device, drafts are small to be difficult to eliminate solidification end shape
At center porosity, larger drafts is easy to crack in casting blank solidification forward position, solidifies to some crack sensitivity steel grades
Final position is difficult to position and be only applicable to the problems such as rectangular casting blank.
(3) it is by entire that mechanical oscillation molding placingJi Shu only has application report, principle in small-sized molding ingot casting
The up-down vibration of platform is molded, the vibration of mold interior liquid metal is driven, feeding is played using inertia force and improves metal and coagulate
Gu the problem of tissue looseness.But the technology can not be used in casting process, main reason is that：1, continuous casting installation for casting can not possibly
Body vibration；2, continuous casting is a dynamic continuous production process, the static process with molding, and the two makes a big difference；3, phase
For small-sized molding ingot casting, the length dimension of continuous-cast blank is very big.
But but existing technique is difficult to effectively improve the loose problem of continuous casting billet structure so that the properties of steel
Deteriorate.And present invention application at the position that the strand cross section metal liquid fraction of 100 solidification end of continuous casting billet is 0~25% swashs
It shakes power, exciting force is transmitted to strand core by green shell, makes half solidification molten steel under the action of shear stress, because positive thixotropy makes
Viscosity declines and mobility improves, under the conditions of molten steel high-head and solidification shrinkage are sucked by vacuum, half solidifies molten steel feeding energy
Power enhances, and to using the positive thixotropy of solid-liquid two-phase metal, improve half mobility for solidifying molten steel, improves half solidification molten steel and exists
The feeding capacity of middle and later periods is solidified, improvement casting blank inner organization is loose, improves slab quality.
Embodiment 1
The present embodiment flows round billet continuous casting machine using certain factory 5, in the casting process of different section round billet, in casting billet surface
One position is provided according to intervals using compressed air-driven using different time intervals, the bringing device of exciting force
The exciting force of certain impact work(, each case are carried out continuously one and pour secondary experiment, and one piece of strand low power sample is taken after casting,
Loose grading is carried out, determine its porousness and is averaged, embodiment design parameter and the results are shown in Table 1.
The present embodiment applies exciting force in the point of application, and the metal liquid fraction of the strand cross section wherein at the point of application is respectively
23%, 15%, 15% and 11%, each experiment condition carries out one and pours secondary experiment, and strand low power sample one is taken after casting
Block, analyzes strand equiaxial crystal ratio and negative segregation situation, embodiment design parameter and the results are shown in Table 1.Wherein point of application metal
The pattern schematic diagram for the macrostructure that liquid fraction is 23% is as shown in Figure 2.
Comparative example 1
The substance of this comparative example with embodiment 1, the difference is that, not to continuous casting billet during continuous casting
100 surfaces apply exciting force.One piece of strand low power sample is taken after casting, analyzes strand equiaxial crystal ratio and negative segregation situation, it is real
It applies a design parameter and the results are shown in Table 1.The pattern schematic diagram of the macrostructure of comparative example 1 is as shown in Figure 3.
Table 1
By the analysis to comparative example 1 and embodiment 1 it can be found that Fig. 2 is the pattern of the strand microstructure of embodiment 1
Schematic diagram；Fig. 3 is the pattern schematic diagram of the strand microstructure of comparative example 1；Figure includes columnar zone 310, isometric crystalline region 320
With center porosity hole 330.Comparison is found, using the isometric crystalline region 320 of strand after this patent with unused this patent and not just with outer
The isometric crystalline region of strand 320 of field force effect is compared, in metal liquid fraction 23%, 15%, 15%, 11%；Time interval is distinguished
For：0.022、0.037、0.0625、0.1s；Ballistic work size is provided respectively：35、40、60、200/J；Center porosity grading detection
The case where obtaining above-mentioned center porosity, center porosity grading are respectively less than 0.5；And the center porosity of comparative example 1 is rated 1.0.
Embodiment 1 applies intermittent since exciting force strikes in casting billet surface green shell on the green shell surface of 100 solidification end of continuous casting billet
Exciting force, the strand cross section metal liquid fraction of 100 solidification end of continuous casting billet is 0~25%, and exciting force is transmitted by green shell
To strand core, make half solidification molten steel under the action of shear stress, because positive thixotropy so that viscosity declines and mobility improves,
Under the conditions of molten steel high-head and solidification shrinkage are sucked by vacuum, half solidifies the enhancing of molten steel feeding capacity, to utilize solid-liquid two-phase
The positive thixotropy of metal improves half mobility for solidifying molten steel, improves half solidification molten steel in the feeding capacity of solidification middle and later periods, changes
Kind casting blank inner organization is loose, improves slab quality.
Embodiment 2
The substance of the present embodiment with embodiment 1, the difference is that：In 100 solidification end of continuous casting billet and continuous casting billet
The green shell surface in 100 solidification stage casings applies intermittent exciting force respectively；And the green shell surface of 100 solidification end of continuous casting billet is applied
The time interval of exciting force is added to be less than the time interval that continuous casting billet 100 solidifies the green shell surface application exciting force in stage casing；Wherein connect
The strand cross section metal liquid fraction of 100 solidification end of strand is b1, and 25% >=b1>0；Continuous casting billet 100 solidifies the casting in stage casing
Base cross section metal liquid fraction is b2, and 75% >=b2>25%.It is 25% >=b in 100 metal liquid fraction of continuous casting billet1>0 position
The place of setting is provided with end exciting force bringing device 210, and end exciting force bringing device 210 is used for the green shell surface of solidification end
Apply intermittent exciting force, the time interval that the exciting force of end exciting force bringing device 210 applies is 0.0167~2s, is shaken
Impact energy ranging from 15~1500J that power applies.It is 75% >=b in 100 metal liquid fraction of continuous casting billet2>It is set at 25% position
It is equipped with stage casing exciting force bringing device 220, between stage casing exciting force bringing device 220 is used to apply to the green shell surface in solidification stage casing
The exciting force (as shown in Figure 4) of having a rest property, the time interval that the exciting force of stage casing exciting force bringing device 220 applies is 1-30 seconds；
Impact energy ranging from 10~800J that exciting force applies.
It is worth noting that, the exciting force and vibrate completely not that solidification end applies are had been described that in embodiment 1 herein
Together, illustrate that the exciting force for solidifying stage casing application and vibration are entirely different again herein, be described as follows：
(1) exciting force and the mode of action of vibration are entirely different, wherein intermittent exciting force is that one way single is last to solidification
The impact or percussion on the green shell surface at end, strand itself do not have relative displacement；And vibration is the reciprocal shaking to strand,
Strand itself may will produce relative displacement, and vibrate that apply to casting blank shell surface is reciprocal active force, because around here
Having a rest property exciting force has the difference of essence with vibration；
(2) mechanism of action is entirely different, formally since exciting force and the mode of action of vibration are entirely different, exciting force impact
In casting billet surface green shell, the dendrite head that solidification front is grown in cooling procedure can be interrupted, column crystal is promoted to be converted into
Axialite, at the same molten steel caused by will not additionally increasing outfield force with solidification front is interdendritic continues relative displacement, it is suppressed that steel
Middle solute element is shifted into the liquid phase of steel；And vibrate be using inertia force play feeding and improve metal solidification texture it is loose
Problem, molten steel caused by vibration meeting additionally increases outfield force simultaneously and the interdendritic lasting relative displacement of solidification front, promote in steel
Solute element is shifted into the liquid phase of steel, causes the generation of strand negative segregation.
Moreover, because the green shell surface in solidification end and solidification stage casing applies the position of exciting force, ballistic work size respectively
With the difference of time interval so that the mechanism of action of solidification end and solidification stage casing application exciting force is also entirely different.
The continuous casting billet 100 of the present invention includes strand concave arc side 101 and strand convex arc side 102, in the solidification base of continuous casting billet 100
The surface of shell 120 applies intermittent exciting force, and the metal liquid fraction of the strand cross section at the exciting force point of application is 25%
~85%.This is because metal liquid fraction is higher than the green shell insufficient strength solidified when 85%, does not have and bear the branch that is effectively broken
The condition of the external force impact of crystal-tipped；Metal liquid fraction has been in solidification end when being less than 25%, continuing exciting can not carry
High strand proportion of equiaxed grain.Apply exciting force in the strand concave arc side 101 of continuous casting billet 100 or strand convex arc side 102；Or
The corresponding position of the two sides of 100 strand concave arc side 101 of continuous casting billet and strand convex arc side 102 applies exciting force.
It is 1-30 seconds to solidify the time interval that stage casing exciting force applies, this is because when the time is less than 1 second, the effect of external force
Close to continuous action, molten steel and the interdendritic lasting relative displacement of solidification front are caused, causes solute element constantly to liquid gold
Transfer in belonging to, easy tos produce negative segregation, and fracture effect is also reduced because dendrite has little time growth；When time is more than 30 seconds, dendrite
The length of growth is long, and fracture dendrite head is few, inadequate to column crystal inhibition.The time interval has with position shell thickness
It closes, dendritic growth is fast when green shell is thin, and exciting interval wants short, and specifically available following relationship indicates：Solidify the green shell surface in stage casing
The time interval for applying exciting force is t2, t2=ε × b2 τ× S, ε value range are 0.4~0.8s/mm2；b2At active position
Metal solid rate/% in 100 lateral cross section of continuous casting billet；τ value ranges are 1.4~2.0；S is casting blank section area/mm2。
Solidify impact energy ranging from 10~800J that stage casing exciting force applies.Specific value and shell thickness (metal liquid phase
Rate) etc. factors it is related, specifically available following relationship indicates：The green shell surface that stage casing is solidified in continuous casting billet 100 applies exciting force
Impact energy be W2,a2Value range is 0.2~2.6J/mm3, b2Swash for solidification stage casing
Metal liquid fraction/% of the strand lateral cross section of power of shaking point of application position；C2Value range is 1.8~2.4；S is casting blank section
Area/mm2。
Along 100 liquidus curve length direction of continuous casting billet, the surface of the solidified shell 120 in stage casing is solidified in continuous casting billet 100 extremely
1 group of stage casing exciting force bringing device 220 is set less, stage casing exciting force bringing device 220 is used to apply exciting force to solidification stage casing,
The present embodiment strand concave arc side 101 is provided with 1 stage casing exciting force bringing device 220, and end exciting force bringing device 210
The same side of continuous casting billet 100, the present embodiment end exciting force bringing device 210 are set to stage casing exciting force bringing device 220
It is set to strand concave arc side 101 with stage casing exciting force bringing device 220.I.e. in a metal liquid fraction position of continuous casting billet 100
It is 1 group of exciting force that the unilateral exciting force of application or the corresponding position of two sides apply exciting force simultaneously；Continuous casting billet 100 not
Then it is multigroup exciting force with multiple exciting forces that metal liquid fraction position applies.It simultaneously can be along 100 liquid phase line length of continuous casting billet
Direction is spent, the point of application of multiple exciting forces is set on the surface of the solidified shell 120 of continuous casting billet 100.
The present embodiment flows round billet continuous casting machine using certain factory 5, and a diameter of 380mm of strand is between casting billet surface is using different time
It is every the bringing device of, exciting force, and in 100 solidification end liquid fraction of continuous casting billet：23% position applies exciting force, the position
Exciting force time interval be 0.022s, solidification end ballistic work be 35J；Continuous casting billet 100 solidify stage casing liquid fraction be：
75%, time interval 3s, solidification end ballistic work are 20J.One piece of strand low power sample is taken after casting, detects equiax crystal
Rate carries out loose grading, determines its porousness and is averaged, 2 design parameter of embodiment and the results are shown in Table 2, low power
The pattern schematic diagram of tissue is as shown in Figure 6.
Comparative example 2
The substance of this comparative example 2 with embodiment 2, the difference is that：Casting process does not apply other measures.Casting
After take one piece of strand low power sample, detection equiaxial crystal ratio carries out loose grading, determines its porousness and is averaged, right
2 design parameter of ratio and the results are shown in Table 2.
Embodiment 3
The substance of the present embodiment with embodiment 2, the difference is that：The a diameter of 380mm of strand, continuous casting billet 100 are solidifying
Gu the both sides in stage casing are correspondingly arranged on stage casing exciting force bringing device 220, and the stage casing exciting force bringing device 220 of both sides is sharp
Power of shaking force direction is conllinear, and in geometry of the force direction of stage casing exciting force bringing device 220 by 100 cross section of continuous casting billet
The heart, the present embodiment are round billet, then the center of circle that the big beating position of exciting force passes through strand cross section；I.e. on strand two sides surface
One point of application position applies exciting force simultaneously, using uniform impingement work(symmetric shock, and the present embodiment is in the solidification of continuous casting billet 100
The corresponding position of the two sides of section strand concave arc side 101 and strand convex arc side 102 applies identical exciting force (such as Fig. 5 institutes simultaneously
Show).
And the application position of exciting force in 100 solidification end of continuous casting billet and solidification stage casing, time interval and ballistic work it is big
It is small different.It takes one piece of strand low power sample, detection equiaxial crystal ratio to carry out loose grading after casting, determines its loose journey
It spends and is averaged, embodiment design parameter and the results are shown in Table 2.
Table 2
By table 2 it can be found that the green shell surface for solidifying stage casing in 100 solidification end of continuous casting billet and continuous casting billet 100 is applied respectively
After adding intermittent exciting force, the equiaxial crystal ratio of embodiment 2 and embodiment 3 is respectively increased to 55% or more, and center porosity is commented
Grade is 0, and when improving slab quality, the phenomenon that not generating any negative segregation.Compared to comparative example 1, embodiment 2 and implementation
The quality of example 3 is improved significantly.
In addition, comparison diagram 3 and Fig. 6, the green shell surface in continuous casting billet solidifying end and solidification stage casing applies intermittent respectively
After exciting force, not only the ratio of isometric crystalline region 320 expands, but also it is loose to reduce casting blank inner organization.This is because even
The green shell surface in casting blank solidification end and solidification stage casing applies intermittent exciting force respectively, and strike is in the solidification of continuous casting billet 100
The exciting force on the green shell surface of section can regularly interrupt the dendrite head that solidification front is grown in cooling procedure so that column
Crystalline substance is converted into the process of equiax crystal, promotes the growth of equiax crystal；And the green shell in 100 solidification end of continuous casting billet is being hit in strike
The exciting force on surface improves feeding capacity of the half solidification molten steel in the solidification middle and later periods using the positive thixotropy of solid-liquid two-phase metal,
The feeding capacity for improving half solidification molten steel while the production of equiax crystal in the solidification middle and later periods is improved, improves casting blank inner organization and dredges
Pine improves slab quality；Stage casing is solidified using exciting force generating system to strand certain position, every a timing in strand 100
Between, the method that instantaneously strikes casting billet surface green shell with the external force of some strength, so that exciting force is passed through green shell and be transmitted to casting blank solidification
Forward position, the dendrite head for the solidification front growth that is periodically broken, while inhibiting column crystals growth, centered on after equiax crystal
Continuous formed provides nucleus core.
The present invention is described in detail above in conjunction with specific exemplary embodiment.It is understood, however, that can not take off
It is carry out various modifications in the case of from the scope of the present invention being defined by the following claims and modification.Detailed description and drawings
Should be to be considered only as it is illustrative and not restrictive, if there is any such modifications and variations, then they all will
It falls into the scope of the present invention described here.In addition, background technology is intended to Development Status and meaning in order to illustrate this technology,
It is not intended to limit the application field of the present invention or the application and the present invention.
Claims (10)
1. a kind of method improving casting process solidification middle and later periods solid-liquid two-phase region mobility, it is characterised in that：In continuous casting billet
(100) the green shell surface of solidification end applies intermittent exciting force, wherein the strand cross section of continuous casting billet (100) solidification end
Metal liquid fraction is b1, and 25% >=b1>0。
2. a kind of method improving casting process solidification middle and later periods solid-liquid two-phase region mobility according to claim 1,
It is characterized in that：The time interval that the exciting force on solidification end green shell surface applies is t1, t1=0.0167~2s.
3. a kind of method improving casting process solidification middle and later periods solid-liquid two-phase region mobility according to claim 1,
It is characterized in that：The impact energy ranging from W that the exciting force on solidification end green shell surface applies1, W1=15~1500J.
4. solidifying middle and later periods solid-liquid two-phase region mobility according to a kind of casting process that improves of claim 1-3 any one of them
Method, it is characterised in that：The impact energy for applying exciting force on the green shell surface of continuous casting billet (100) solidification end is W1, W1=a1×
(1-b)C×S1.5,
a1Value range is 0.2~1.0J/mm3,
b1For metal liquid fraction/% of the strand lateral cross section of solidification end exciting force point of application position；
C1Value range is 2.7~3.3；
S is casting blank section area/mm2。
5. the control method of slab quality during a kind of continuous casting and solidifying, it is characterised in that：In continuous casting billet (100) solidification end and
The green shell surface in continuous casting billet (100) solidification stage casing applies intermittent exciting force respectively；And the base of continuous casting billet (100) solidification end
The time interval that shell surface applies exciting force was less than between the time of green shell surface application exciting force in continuous casting billet (100) solidification stage casing
Every；Wherein the strand cross section metal liquid fraction of continuous casting billet (100) solidification end is b1, and 25% >=b1>0；Continuous casting billet (100)
The strand cross section metal liquid fraction for solidifying stage casing is b2, and 75% >=b2>25%.
6. the control method of slab quality during a kind of continuous casting and solidifying according to claim 5, it is characterised in that：Solidification
The time interval that the green shell surface of end applies exciting force is t1, t1=0.0167~2s, or/and solidify the green shell surface in stage casing
The time interval for applying exciting force is t2, t2=1-30s.
7. the control method of slab quality during a kind of continuous casting and solidifying according to claim 5, it is characterised in that：Solidification
The green shell surface of end applies the impact energy ranging from W of exciting force1, W1=15~1500J；Or/and the green shell surface in solidification stage casing
Apply the impact energy ranging from W of exciting force2, W2=10~800J.
8. the control method of slab quality during a kind of continuous casting and solidifying according to claim 5, it is characterised in that：Even
The impact energy that the green shell surface of strand (100) solidification end applies exciting force is W1
a1Value range is 0.2~1.0J/mm3,
b1For metal liquid fraction/% of the strand lateral cross section of solidification end exciting force point of application position；
C1Value range is 2.7~3.3；
S is casting blank section area/mm2。
9. the control method of slab quality during a kind of continuous casting and solidifying according to claim 5, it is characterised in that：Even
The green shell surface that strand (100) solidifies stage casing applies the impact energy of exciting force as W2,
a2Value range is 0.2~2.6J/mm3,
b2For metal liquid fraction/% of the strand lateral cross section of solidification stage casing exciting force point of application position；
C2Value range is 1.8~2.4；
S is casting blank section area/mm2。
10. the control device of slab quality during a kind of continuous casting and solidifying, it is characterised in that：In continuous casting billet (100) metal liquid phase
Rate is 25% >=b1>End exciting force bringing device (210) is provided at 0 position, and in continuous casting billet (100) metal liquid fraction
For 75% >=b2>Stage casing exciting force bringing device (220), end exciting force bringing device (210) are provided at 25% position
It is respectively used to stage casing exciting force bringing device (220) for applying intermittent exciting force to green shell surface.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810268564.1A CN108526423A (en) | 2018-03-29 | 2018-03-29 | A kind of method, control method and device of slab quality improving casting process solidification middle and later periods solid-liquid two-phase region mobility |
| PCT/CN2019/078323 WO2019184729A1 (en) | 2018-03-29 | 2019-03-15 | Method for improving fluidity of solid-liquid two-phase region in middle and late solidification stages of continuous casting process, and method and device for controlling quality of cast ingot |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810268564.1A CN108526423A (en) | 2018-03-29 | 2018-03-29 | A kind of method, control method and device of slab quality improving casting process solidification middle and later periods solid-liquid two-phase region mobility |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108526423A true CN108526423A (en) | 2018-09-14 |
Family
ID=63481664
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810268564.1A Pending CN108526423A (en) | 2018-03-29 | 2018-03-29 | A kind of method, control method and device of slab quality improving casting process solidification middle and later periods solid-liquid two-phase region mobility |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN108526423A (en) |
| WO (1) | WO2019184729A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019184729A1 (en) * | 2018-03-29 | 2019-10-03 | 马鞍山钢铁股份有限公司 | Method for improving fluidity of solid-liquid two-phase region in middle and late solidification stages of continuous casting process, and method and device for controlling quality of cast ingot |
| CN110548845A (en) * | 2019-09-30 | 2019-12-10 | 中达连铸技术国家工程研究中心有限责任公司 | Continuous casting rotary supporting roller with vibrating piece |
| CN110586890A (en) * | 2019-09-30 | 2019-12-20 | 中达连铸技术国家工程研究中心有限责任公司 | Continuous casting supporting roller with vibrating base |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112846120B (en) * | 2021-01-06 | 2022-08-16 | 鞍钢股份有限公司 | Device and method for refining solidification structure of high manganese steel continuous casting billet |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1586767A (en) * | 2004-07-19 | 2005-03-02 | 钢铁研究总院 | Method for improving continuous casting blank quality and vibration support roller device |
| JP2007229748A (en) * | 2006-02-28 | 2007-09-13 | Sumitomo Metal Ind Ltd | Method for continuously casting steel and blow vibrator |
| CN101778682A (en) * | 2007-08-08 | 2010-07-14 | 住友金属工业株式会社 | Hammering vibrator in continuous casting |
| CN102264490A (en) * | 2008-12-25 | 2011-11-30 | 住友金属工业株式会社 | Method of continuous steel casting |
| CN103464704A (en) * | 2013-09-11 | 2013-12-25 | 钢铁研究总院 | Vibration hammer device for continuous casting billet and using method |
| CN208116707U (en) * | 2018-03-29 | 2018-11-20 | 马鞍山钢铁股份有限公司 | Slab quality and improve the control device of middle and later periods solid-liquid two-phase region mobility during a kind of continuous casting and solidifying |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06297107A (en) * | 1993-04-12 | 1994-10-25 | Nippon Steel Corp | Continuous casting method |
| JP3835185B2 (en) * | 2001-03-19 | 2006-10-18 | 住友金属工業株式会社 | Steel continuous casting method |
| JP4699001B2 (en) * | 2004-10-18 | 2011-06-08 | 住友金属工業株式会社 | Continuous casting method |
| JP5188862B2 (en) * | 2008-04-04 | 2013-04-24 | 株式会社Ｉｈｉ | Continuous hammering device for continuous casting of slabs |
| CN105710326A (en) * | 2014-12-05 | 2016-06-29 | 青岛泰威机床有限公司 | Steel continuous casting method |
| CN108526423A (en) * | 2018-03-29 | 2018-09-14 | 马鞍山钢铁股份有限公司 | A kind of method, control method and device of slab quality improving casting process solidification middle and later periods solid-liquid two-phase region mobility |
-
2018
- 2018-03-29 CN CN201810268564.1A patent/CN108526423A/en active Pending
-
2019
- 2019-03-15 WO PCT/CN2019/078323 patent/WO2019184729A1/en active Application Filing
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1586767A (en) * | 2004-07-19 | 2005-03-02 | 钢铁研究总院 | Method for improving continuous casting blank quality and vibration support roller device |
| JP2007229748A (en) * | 2006-02-28 | 2007-09-13 | Sumitomo Metal Ind Ltd | Method for continuously casting steel and blow vibrator |
| CN101778682A (en) * | 2007-08-08 | 2010-07-14 | 住友金属工业株式会社 | Hammering vibrator in continuous casting |
| CN102264490A (en) * | 2008-12-25 | 2011-11-30 | 住友金属工业株式会社 | Method of continuous steel casting |
| CN103464704A (en) * | 2013-09-11 | 2013-12-25 | 钢铁研究总院 | Vibration hammer device for continuous casting billet and using method |
| CN208116707U (en) * | 2018-03-29 | 2018-11-20 | 马鞍山钢铁股份有限公司 | Slab quality and improve the control device of middle and later periods solid-liquid two-phase region mobility during a kind of continuous casting and solidifying |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019184729A1 (en) * | 2018-03-29 | 2019-10-03 | 马鞍山钢铁股份有限公司 | Method for improving fluidity of solid-liquid two-phase region in middle and late solidification stages of continuous casting process, and method and device for controlling quality of cast ingot |
| CN110548845A (en) * | 2019-09-30 | 2019-12-10 | 中达连铸技术国家工程研究中心有限责任公司 | Continuous casting rotary supporting roller with vibrating piece |
| CN110586890A (en) * | 2019-09-30 | 2019-12-20 | 中达连铸技术国家工程研究中心有限责任公司 | Continuous casting supporting roller with vibrating base |
| CN110548845B (en) * | 2019-09-30 | 2024-05-28 | 中达连铸技术国家工程研究中心有限责任公司 | Continuous casting rotary supporting roller with vibrating piece |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2019184729A1 (en) | 2019-10-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8992705B2 (en) | Microcrystalline alloy, method for production of the same, apparatus for production of the same, and method for production of casting of the same | |
| Sengupta et al. | A new mechanism of hook formation during continuous casting of ultra-low-carbon steel slabs | |
| Puga et al. | Influence of indirect ultrasonic vibration on the microstructure and mechanical behavior of Al–Si–Cu alloy | |
| CN108526423A (en) | A kind of method, control method and device of slab quality improving casting process solidification middle and later periods solid-liquid two-phase region mobility | |
| CN101660063B (en) | Device for preparing semi-solid alloy melt and process for preparing AlSi9Mg semi-solid alloy | |
| CN102198499A (en) | Casting device and casting method | |
| CN101181746A (en) | Lost foam casting vibration clotting method | |
| JP2018526229A (en) | Ultrasonic atomization and degassing procedures and systems for metal casting | |
| CN105108080B (en) | Suppress the Semi-continuous casting crystallizer and its using method of magnesium alloy ingot blank cracking | |
| CN208116707U (en) | Slab quality and improve the control device of middle and later periods solid-liquid two-phase region mobility during a kind of continuous casting and solidifying | |
| Haghayeghi et al. | The effect of ultrasonic vibrations prior to high pressure die-casting of AA7075 | |
| Kund | Effect of tilted plate vibration on solidification and microstructural and mechanical properties of semisolid cast and heat-treated A356 Al alloy | |
| JP7178353B2 (en) | System for Metal Casting Including Ultrasonic Grain Refining and Degassing Procedures and Enhanced Vibration Coupling | |
| CN1332773C (en) | Improved method of vibration exciting metal liquid shape crystal nucleus and its device | |
| CN109692941A (en) | Improve the device and method of bottom casting molding ingot quality using ultrasonic wave | |
| Khalifa et al. | Microstructure characteristics and tensile property of ultrasonic treated-thixocast A356 alloy | |
| CN109692942A (en) | Improve the device and method of vacuum downhill casting molding ingot quality using ultrasonic wave | |
| CN103691895B (en) | A kind of vibration serpentine channel preparation method and device of semi-solid-state metal | |
| CN201091907Y (en) | Fai 600 over-size round mold assembly having magnetic stirrer | |
| JP7135556B2 (en) | Method for manufacturing titanium ingot | |
| CN108500226A (en) | A kind of continuous casting and solidifying course control method for use inhibiting column crystals growth | |
| US20030041999A1 (en) | Method and apparatus for improving internal quality of continuously cast steel sections | |
| CN106282869B (en) | A kind of device and method of light-alloy melt magneto vibration solidification | |
| KUMAR | Behavior of A356 and A319 Aluminium Alloy castings solidified under oscillatory conditions | |
| US20220017993A1 (en) | Method and apparatus for processing a liquid alloy |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |