CN107812902A - A kind of device for improving micro-alloyed steel continuous casting process castability - Google Patents
A kind of device for improving micro-alloyed steel continuous casting process castability Download PDFInfo
- Publication number
- CN107812902A CN107812902A CN201711285140.8A CN201711285140A CN107812902A CN 107812902 A CN107812902 A CN 107812902A CN 201711285140 A CN201711285140 A CN 201711285140A CN 107812902 A CN107812902 A CN 107812902A
- Authority
- CN
- China
- Prior art keywords
- micro
- continuous casting
- castability
- alloyed steel
- casting process
- 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.)
- Granted
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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
The invention discloses a kind of device for improving micro-alloyed steel continuous casting process castability, it is related to micro-alloyed steel continuous casting production field.The present invention includes casting mechanism and electrode clamping mechanism；Casting mechanism includes ladle and tundish, and ladle is placed in above tundish, by long nozzle with being connected inside tundish inside ladle；Electrode clamping mechanism includes：Columned pulsed electrode, when micro alloyed steel strand is poured into a mould using continuous casting process, pulsed electrode is placed in the microalloy molten steel in tundish and applies pulse current to microalloy molten steel；Holder, holder are used to clamp pulsed electrode；Energization part, one end of energization part are connected with holder, and energization part is connected with the pulse power；Extension bar, one end of extension bar are connected by collets with the other end of energization part.It is an object of the invention to submersed nozzle during overcoming the shortcomings of existing titanium micro-alloyed steel continuous casting easily to block, there is provided device ensure that production is smoothed out.
Description
Technical field
The present invention relates to micro-alloyed steel continuous casting production field, improves micro-alloyed steel continuous casting mistake more specifically to one kind
The device of journey castability.
Background technology
During the existing cast using continuous casting process, because the high-melting-point field trash in molten steel is easily adhered in crystallizer
On submersed nozzle inwall, blocking is brought it about, so causing the casting sequence of a tundish time relatively low, production cost increases
Add, organization of production is by extreme influence.Especially casting section less continuous casting billet when, due to crystallizer submersed nozzle internal diameter
Smaller, clogging is more serious.
The castability of molten steel during in order to improve continuous casting, has been presented for some solutions in the prior art, wherein, pin
Castability to how to improve mild steel, following technical scheme, such as patent publication No. are disclosed in the prior art：CN
102268513A, publication date：On December 07th, 2011, invention and created name are：A kind of improvement middle low carbon steel pourability of molten steel
Method, this application case provide a kind of method for improving middle low carbon steel pourability of molten steel, and it includes：By the sulfur content control in molten iron
It is made as being not more than 0.015%；Just refining is carried out to molten iron to form molten steel, then by molten steel tapping into ladle；By weight hundred
During point than meter tapping 20%~30%, the oxygen content in molten steel during first refining terminal, which adds, appropriate is substantially free of aluminium
Or the deoxidier without aluminium；During tapping 31%~50% by weight percentage, the oxygen content in molten steel adds
Active lime and the addition for entering 3.0~5.0Kg/ ton steel are 20% fluorite of active lime；First time ar blowing refining；Ladle
Stove refines and carries out second of ar blowing refining；Cast using continuous casting process.This application case need not carry out Calcium treatment, just make
Pourability of molten steel be effectively improved, nozzle clogging phenomenon is alleviated, in low-aluminum-content in low-carbon aluminium casting process in
Between continuous cast crystallizer number be not less than 8 stoves, reached the purpose of economical production.
Castability for how to improve mild steel, following technical scheme, such as patent public affairs are also disclosed in the prior art
The number of opening：CN 103451349A, publication date：On December 18th, 2013, invention and created name are：One kind prevents Ultra-low carbon aluminium deoxidation
The control method of molten steel casting cycle nozzle blocking, this application case use desulfurizing iron processing-converter smelting-converter tapping-RH
The processing route smelting suprelow carbon steel of application of vacuum-double-current sheet billet continuous casting casting, the castability of Ultra-low carbon aluminium deoxidation molten steel is improved,
Rationally endpoint molten steel oxygen content, end point carbon content and temperature are bessemerized in control, and advantage is provided for RH vacuum decarburizations；Continuous casting
Protective casting, protected using long nozzle, submersed nozzle argon blowing seal, prevent secondary oxidation of steel；Using alkaline covering agent, prevent
Only secondary oxidation of steel, preferably adsorb the field trash in molten steel；The castability of Ultra-low carbon aluminium deoxidation molten steel is improved, is realized
It is whole pour time sequence casting during submersed nozzle do not block, without changing submersed nozzle, so as to avoid because changing immersion
The mouth of a river and influence slab quality.
The carbonitride of microalloy element is advantageous to improve steel strength and toughness, the micro-alloying technology formed are present
Just it is being applied to extensive field, especially high-quality steel, such as Properties of Heavy Rail Steel, tool steel.With micro alloyed steel yield significantly
Rise, and the raising to ferrous materials performance requirement, constantly expose new quality problems, in low-alloy in actual production
Trace Ti is added in high-strength steel, casting blank solidification tissue can be refined, improves the intensity of steel, improves cold formability energy and the welding of steel
Performance.Ti has obvious cost advantage, the research for titanium micro-alloyed steel is relatively more in the prior art relative to Nb and V.
But found during existing titanium micro-alloyed steel continuous casting, the mouth of a river tends to block when it is poured into a mould, the castability of molten steel compared with
Difference.
In summary, how to improve the castability of existing titanium micro-alloyed steel continuous casting process, be urgent need to resolve in the prior art
Technical barrier.
The content of the invention
1. invention technical problems to be solved
Easily blocked it is an object of the invention to overcome submersed nozzle during existing titanium micro-alloyed steel continuous casting
Deficiency, there is provided a kind of device for improving micro-alloyed steel continuous casting process castability, ensure that production is smoothed out.
2. technical scheme
To reach above-mentioned purpose, technical scheme provided by the invention is：
The device of the improvement micro-alloyed steel continuous casting process castability of the present invention, including casting mechanism and electrode clamping mechanism；
The casting mechanism includes ladle and tundish, and the ladle is placed in above tundish, passes through long nozzle and centre inside ladle
Bag is internal to be connected；The electrode clamping mechanism includes：
Columned pulsed electrode, when micro alloyed steel strand is poured into a mould using continuous casting process, during the pulsed electrode is placed in
Between apply in microalloy molten steel in bag and to microalloy molten steel pulse current, while by ultrasonic generator to tundish
Interior microalloy molten steel transmitting ultrasonic wave, wherein ultrasonic power density is 18-35W/cm2, frequency 20-30KHz；Clamping
Part, the holder are used to clamp the pulsed electrode；Energization part, one end of the energization part are connected with the holder, institute
Energization part is stated to be connected with the pulse power；Extension bar, one end of the extension bar pass through collets and the other end of the energization part
Connection.
As further improvement of the present invention, the parameter of the pulse current is：10~36V of pulse voltage, pulse electricity
Flow 100~2000A, 1000~30000Hz of pulse frequency.
As further improvement of the present invention, Ti elements are included in the micro alloyed steel.
As further improvement of the present invention, when applying pulse current, the degree of superheat control of microalloy molten steel 20~
40℃。
As further improvement of the present invention, C in the micro alloyed steel<0.25%wt or 0.25%≤C≤0.60%
Wt or C>0.60%wt.
As further improvement of the present invention, the content of Ti elements is 0.10%wt-0.80%wt in micro alloyed steel.
As further improvement of the present invention, the holder includes two the semicircular ring with flanging, two band flangings
The circular arc portion of semicircular ring surround wheel flange, the wheel flange is wrapped in the lateral surface of pulsed electrode, two semicircles with flanging
The corresponding tuck portion of ring forms holding piece by the first bolt connection.
As further improvement of the present invention, the energization part includes energization bar and is connected to the company at energization bar both ends
Contact pin；The connection sheet of described energization bar one end is by the second bolt connection on a holding piece of holder；The energization bar
On be connected with conducting strip, the conducting strip is provided with through hole, and conducting strip is connected with the pulse power.
As further improvement of the present invention, the electrode clamping mechanism also includes insulated bolt；The insulated bolt
One end of the connection sheet of the energization bar other end, collets and extension bar is sequentially passed through, and three is connected and fixed；Institute
The both ends for stating pulsed electrode are respectively equipped with the stop nahlock that diameter is more than pulsed electrode diameter；The pulsed electrode is aluminium carbonaceous electricity
Pole.
As further improvement of the present invention, the bottom of the tundish is communicated with submersed nozzle, the immersion water
Mouth is used cooperatively with stopper, is provided with the barricade and dam of mutual cooperation inside tundish between submersed nozzle and long nozzle.
3. beneficial effect
Using technical scheme provided by the invention, compared with prior art, there is following remarkable result：
(1) in the present invention, after applying pulse current, the change procedure inside titanium micro-alloyed molten steel is as follows：Titanium micro-alloyed steel
The nucleation rate of precipitate TiN in water is significantly improved, so as to inhibit single TiN particles to separate out growing up for size, largely
The TiN precipitates of small size flow away from submersed nozzle, avoid original large scale TiN precipitate particles and easily block immersion
The phenomenon at the mouth of a river, improve the castability of titanium micro-alloyed steel continuous casting process.
(2) inventor, which studies, finds, the content that Ti elements are added in micro alloyed steel is 0.10%wt-0.80%wt, is matched somebody with somebody
Close pulse current parameter be：10~36V of pulse voltage, 100~2000A of pulse current, 1000~30000Hz of pulse frequency,
TiN nucleation rate can be farthest improved, avoids nozzle blocking, so as to improve pouring for micro-alloyed steel continuous casting process
Property；Wherein it should be noted that when applying pulse current, the degree of superheat of microalloy molten steel needs to control at 20~40 DEG C, so as to
Regulating and controlling effect of the pulse current to TiN precipitation processes can effectively be played.
(3) in the present invention, apply the operation of pulse current, do not change the technological parameter of existing production process, it is not necessary to right
Production process is especially controlled, and does not influence produced on-site, and its is simple to operate, and cost is cheap, can effectively improve micro alloyed steel company
The castability of casting process；Wherein, the voltage of the pulse current used<36V, belong to safe voltage, do not influence personal safety, to life
Equipment is produced without influence.
Brief description of the drawings
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below by embodiment it is required use it is attached
Figure is briefly described, it will be appreciated that the following drawings illustrate only certain embodiments of the present invention, therefore be not construed as pair
The restriction of scope, for those of ordinary skill in the art, on the premise of not paying creative work, can also be according to this
A little accompanying drawings obtain other related accompanying drawings.
Fig. 1 is the structural representation of the device of the improvement micro-alloyed steel continuous casting process castability of embodiment 1；
Fig. 2 is the structural representation of electrode clamping mechanism in embodiment 1-7；
Fig. 3 is the structural representation of holding piece in Fig. 2；
Fig. 4 be Fig. 2 in energization part along A to structural representation；
Fig. 5 is the structural representation of electrode clamping mechanism in embodiment 7；
Fig. 6 is the structural representation of electrode clamping mechanism in embodiment 8；
Fig. 7 is the transmission electron microscope picture that strand samples in embodiment 1.
Label declaration in schematic diagram：1st, pulsed electrode；2nd, holder；201st, wheel flange；202nd, holding piece；3rd, it is powered
Part；301st, energization bar；302nd, connection sheet；4th, conducting strip；5th, collets；6th, extension bar；7th, the first bolt；8th, the second bolt；9、
The pulse power；10th, stopper；11st, ladle；12nd, long nozzle；13rd, tundish；14th, submersed nozzle；15th, barricade；16th, dam.
Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is
Part of the embodiment of the present invention, rather than whole embodiments.Therefore, embodiments of the invention to providing in the accompanying drawings below
Detailed description be not intended to limit the scope of claimed invention, but be merely representative of the present invention selected embodiment.
Based on the embodiment in the present invention, those of ordinary skill in the art are obtained all under the premise of creative work is not made
Other embodiment, belong to the scope of protection of the invention.
To further appreciate that present disclosure, the present invention is described in detail in conjunction with the accompanying drawings and embodiments.
Embodiment 1
With reference to Fig. 1-4, the device of the improvement micro-alloyed steel continuous casting process castability of the present embodiment, including casting mechanism and electricity
Pole clamping device.
Casting mechanism includes ladle 11 and tundish 13, and ladle 11 is placed in the top of tundish 13, passes through length inside ladle 11
The mouth of a river 12 connects with the inside of tundish 13；The bottom of tundish 13 is communicated with submersed nozzle 14, the submersed nozzle 14 and plug
Rod 10 is used cooperatively, and the barricade 15 and gear of mutual cooperation are provided between the inside submersed nozzle 14 of tundish 13 and long nozzle 12
Dam 16.
Electrode clamping mechanism includes：Columned pulsed electrode 1, when micro alloyed steel strand is poured into a mould using continuous casting process,
Pulsed electrode 1 is placed in the microalloy molten steel in tundish 13 and applies pulse current to microalloy molten steel；Holder 2, clamping
Part 2 is used to clamp pulsed electrode 1；Energization part 3, one end of energization part 3 are connected with holder 2, and energization part 3 connects with the pulse power 9
Connect；Extension bar 6, one end of extension bar 6 are connected by collets 5 with the other end of energization part 3.Wherein, the parameter of pulse current
For：10~36V of pulse voltage, 100~2000A of pulse current, 1000~30000Hz of pulse frequency；Ti is included in micro alloyed steel
Element, the content of Ti elements is 0.10%wt-0.80%wt in micro alloyed steel；When applying pulse current, the mistake of microalloy molten steel
Temperature is controlled at 20~40 DEG C；C in micro alloyed steel<0.25%wt or 0.25%≤C≤0.60%wt or C>0.60%wt.
In specific the present embodiment, the material of steel alloy is AISI321 titanium micro-alloyed steels, and its main chemical compositions is (quality
Percentage)：0.031%C, 0.74%Si, 0.99%Mn, 0.027%P, 0.003%S, 17.33%Cr, 9.34%Ni,
0.12%Ti, 0.019%Al.After the ladle 11 for filling with microalloy molten steel is transported to ladle turret, tundish car carries baking
Tundish 13 after roasting reaches cast position, then carries out open casting operation, microalloy molten steel is from the bottom of ladle 11 along long nozzle 12
Into tundish 13, now microalloy molten steel overheat control is 25 DEG C.When molten steel rises to operating fluid level in tundish 13, open
Stopper 10, microalloy molten steel enters crystallizer along submersed nozzle 14 and two cold-zones solidify out into continuous casting billet.Treat tundish 13
The both positive and negative polarity of pulsed electrode 1 is inserted respectively into tundish 13 in molten steel by interior liquid level stabilizing after operating fluid level, opens pulse
Power supply 9, adjusting parameter are：Pulse voltage 13.6V, pulse current：800A, pulse frequency 25000Hz, it is continuous to pour into a mould 10 stove steel
Afterwards, do not occur the phenomenon of nozzle blocking.
One piece of sample is cut in the strand gone out from above continuous casting, wire cutting is 15mm × 15mm sample, by sample surfaces
Polish and polish, it is just dimmed to specimen surface with 4% nital etch sample, using vacuum coating equipment to sample
Spraying plating carbon film, spray the specimen surface after carbon and steel occur in 300 DEG C or so tempering occurred blueness, then illustrate that thickness conforms to
Ask, then mark the lattice that diagonal spacing is 2mm on carbon film face with blade, sample carbon film face is then put into 4% nitre
Etch in sour alcoholic solution, after carbon film after specimen surface comes off, carbon film is pulled out to clean using copper mesh and dried, is put into transmission electricity
In mirror, you can to observe TiN patterns therein, wherein finding that TiN sizes are concentrated between 10~80nm, as shown in Figure 7.
In the present embodiment, after applying pulse current, the change procedure inside microalloy molten steel is as follows：Microalloy molten steel is entered
After horizontal pulse current processing, the nucleation rate of the precipitate TiN in microalloy molten steel is significantly improved, single so as to inhibit
TiN particles separate out growing up for size, and the TiN precipitates of a large amount of small sizes (10~100nm) flow away from submersed nozzle 14, keep away
The phenomenon that original large scale TiN precipitates (1~100um) particle easily blocks submersed nozzle 14 is exempted from, has improved titanium micro-alloyed
The castability of steel casting process.
By analyzing nozzle blocking mechanism, it can be deduced that the main reason for causing nozzle blocking includes molten steel matter
Amount, liquid steel temperature, mouth of a river material and structure, mouth of a river heat transfer and all many factors such as secondary oxidation.Nitride of the titanium in steel
Mainly exist in the form of TiN, titanium is initially formed TiN in steel, and TiN granular sizes are relevant with its precipitation process.First, it is thick
TiN is the precipitated phase during solidification of molten steel, when being distributed more thick TiN in molten steel, not only wastes Ti elements, and have phase
Reaction, it effectively can not prevent crystal grain from growing up, and not play invigoration effect, in the present embodiment, be found by lot of experiments,
During titanium micro-alloyed steel continuous casting, thick TiN significantly affects titanium micro-alloyed as a kind of easy material for forming mouth of a river storage stream
The castability of steel casting process, in order to avoid thick TiN is formed, in the prior art typically by reduce in molten steel titanium nitrogen product come
Realize, this, which stores stream to the mouth of a river, certain alleviation, but TiN precipitation total amount will necessarily be reduced by reducing titanium nitrogen product, limit rolling
Steel performance afterwards.In the prior art, history rosy clouds study the (reference of 430 ferritic stainless steel TiN forming cores thinning solidification structures：Shi Cai
Research [D] Beijing of rosy clouds .430 ferritic stainless steel TiN forming core thinning solidification structures：University of Science ＆ Technology, Beijing, 2007.), and
State of Zhao's light research clean steel titanium nitride solidification refinement technology (reference：The clean steels such as State of Zhao's light, Zhu Xiaoxia, Zhao Pei titanium nitride solidifies
Basis [J] the University of Science ＆ Technology, Beijing journal of refinement technology, 2002, Vol, 24 (3):274.), all show to utilize tiny TiN shapes
Core is a kind of effective means of thinning solidification structure.But tiny TiN is formed in molten steel, it is necessary to there is strict technology controlling and process,
And thick TiN is easily formed, so as to significantly affect casting process molten steel castability.
Therefore, for the casting process of titanium micro-alloyed steel, on the one hand wish to form tiny TiN refinement solidification groups
Knit, be on the other hand not intended to be formed thick TiN and influence molten steel and normally pour into a mould.But based on existing technology, above-mentioned two
Individual aspect can not often get both, and fail to overcome above mentioned problem in the prior art always, and it, which has its source in, effectively accurately to control
TiN pick-up behavior in titanium micro-alloyed steel.
Inventor is not intended to discovery by many experiments, and TiN in titanium micro-alloyed steel can be preferably controlled using pulse current
Pick-up behavior, be specially：Inventor, which studies, to be found, pulsed current annealing can promote TiN precipitation, reduce TiN forming core
Potential barrier We, so as to improve nucleation rate Ie, it is possible to increase the amount of precipitation of tiny TiN particles and the amount of precipitation for reducing thick TiN,
Its key is that control nucleation rate improves, because the total amount of Ti elements is limited, TiN nucleation rates are higher, the TiN particle chis of precipitation
It is very little just smaller.
Meanwhile inventor studies and found, the content that Ti elements are added in micro alloyed steel is 0.10%wt-0.80%wt, is matched somebody with somebody
Close pulse current parameter be：10~36V of pulse voltage, 100~2000A of pulse current, 1000~30000Hz of pulse frequency,
TiN nucleation rate can be farthest improved, avoids nozzle blocking, so as to improve pouring for titanium micro-alloyed steel continuous casting process
Property.Wherein it should be noted that when applying pulse current, the degree of superheat of microalloy molten steel needs to control at 20~40 DEG C, so as to
Regulating and controlling effect of the pulse current to TiN precipitation processes can effectively be played.
Further, when micro alloyed steel strand is poured into a mould using continuous casting process, pulsed electrode 1 is placed in micro- in tundish 13
Apply pulse current, while micro- conjunction by ultrasonic generator into tundish 13 in alloy molten steel and to microalloy molten steel
Golden molten steel launches ultrasonic wave, and wherein ultrasonic power density is 18-35W/cm2, frequency 20-30KHz, applying pulse current
When improving TiN nucleation rates, the TiN of a large amount of small sizes is separated out, while coordinates the use of above certain power and frequency ultrasonic wave, can
Sustained vibration stirring is formed to the microalloy molten steel in tundish 13, so that the TiN of a large amount of small sizes is uniformly distributed in steel
In liquid, the TiN of small size is effectively avoided to form large-sized TiN because of localized clusters, so as to further improve titanium micro-alloyed steel
The castability of casting process.Wherein, the ultrasonic wave of certain power and frequency is launched to microalloy molten steel, also may be used to a certain extent
To improve TiN nucleation rate.
With reference to Fig. 2-4, in the present embodiment, collets 5 are set between extension bar 6 and energization part 3 so that the He of extension bar 6
It is non-conductive between energization part 3, facilitate operating personnel to hold extension bar 6 and operated, ensure the safety of produced on-site；Extension bar 6
It is connected with energization part 3, extension bar 6 is placed on crosshead, operating personnel convenient operation, improves work away from hot environment
Make efficiency.
In the present embodiment, it is aluminium carbonaceous pulsed electrode to apply the pulsed electrode 1 that pulse current uses, and has good conduction
And resistance to elevated temperatures.
In the present embodiment, apply the operation of pulse current, do not change the technological parameter of existing production process, it is not necessary to life
Production process is especially controlled, and does not influence produced on-site, and its is simple to operate, and cost is cheap, can effectively improve micro-alloyed steel continuous casting
The castability of process；Wherein, the voltage of the pulse current used<36V, belong to safe voltage, do not influence personal safety, to production
Equipment is without influence.
Embodiment 2
With reference to Fig. 2-4, the device of the improvement micro-alloyed steel continuous casting process castability of the present embodiment, its structure and embodiment 1
It is essentially identical, further：Holder 2 includes two the semicircular ring with flanging, the arc sections of two semicircular rings with flanging
Divide and surround wheel flange 201, the wheel flange 201 is wrapped in the lateral surface of pulsed electrode 1, the corresponding folding of two semicircular rings with flanging
Rim portion is connected by the first bolt 7, forms holding piece 202.
In the present embodiment, holder 2 includes two the semicircular ring with flanging, the circular arc portion of two semicircular rings with flanging
Wheel flange 201 is surrounded, the wheel flange 201 is wrapped in the lateral surface of pulsed electrode 1, the corresponding flanging of two semicircular rings with flanging
Part is connected by the first bolt 7, forms holding piece 202, and wheel flange 201 is fitted tightly over the lateral surface of pulsed electrode 1, can be incited somebody to action
Pulsed electrode 1 firmly clamps, wherein, the pulsed electrode 1 of specific dimensions can be clamped by wheel flange 201, ensures that production is suitable
Profit is carried out；And wherein require：Wheel flange 201 has some strength, high temperature resistant and not reacted with pulsed electrode 1；The energy of energization part 3
It is conductive and resistance is small, has some strength and high temperature resistant；Collets 5 have some strength, high temperature resistant, and certain length and thickness
Ensure that energization part 3 does not contact with extension bar 6；Extension bar 6 is to have some strength, length and relatively resistant to elevated temperatures metallic rod.
Embodiment 3
With reference to Fig. 2-4, the device of the improvement micro-alloyed steel continuous casting process castability of the present embodiment, its structure and embodiment 2
It is essentially identical, further：Energization part 3 includes energization bar 301 and is connected to the connection sheet 302 at the both ends of energization bar 301；It is logical
The connection sheet 302 of the one end of electric pole 301 is connected on a holding piece 202 of holder 2 by the second bolt 8.
In the present embodiment, energization part 3 includes energization bar 301 and is connected to the connection sheet 302 at the both ends of energization bar 301, leads to
The connection sheet 302 of the one end of electric pole 301 is connected on a holding piece 202 of holder 2 by the second bolt 8 so that energization bar
It is easy for installation between 301 and holder 2, it is easy to onsite application.
Embodiment 4
With reference to Fig. 2-4, the device of the improvement micro-alloyed steel continuous casting process castability of the present embodiment, its structure and embodiment 3
It is essentially identical, further：Conducting strip 4 is connected with energization bar 301, the conducting strip 4 is provided with through hole, conducting strip 4 and arteries and veins
Power supply 9 is rushed to connect.
In the present embodiment, conducting strip 4 is connected with energization bar 301, the conducting strip 4 is provided with through hole, can be logical more than
Hole easily connects the pulse power 9, improves installation and operating efficiency.
Embodiment 5
With reference to Fig. 2-4, the device of the improvement micro-alloyed steel continuous casting process castability of the present embodiment, its structure and embodiment 4
It is essentially identical, further：Electrode clamping mechanism also includes insulated bolt, and it is another that insulated bolt sequentially passes through energization bar 301
One end of the connection sheet 302 at end, collets 5 and extension bar 6, and three is connected and fixed.
In the present embodiment, insulated bolt sequentially passes through connection sheet 302, collets 5 and the lengthening of the other end of energization bar 301
One end of bar 6, and three is connected and fixed, the installation between energization bar 301 and extension bar 6 has both been facilitated, while absolutely
Edge bolt is non-conductive, ensures the safety of produced on-site.
Embodiment 6
With reference to Fig. 2-4, the device of the improvement micro-alloyed steel continuous casting process castability of the present embodiment, its structure and embodiment 5
It is essentially identical, further：The both ends of pulsed electrode 1 are respectively equipped with the stop nahlock that diameter is more than the diameter of pulsed electrode 1.
In the present embodiment, the both ends of pulsed electrode 1 are respectively equipped with the stop nahlock that diameter is more than the diameter of pulsed electrode 1, protect
Shield pulsed electrode 1 does not skid off out of wheel flange 201, improves the using effect of holder 2.
Electrode clamping mechanism in the present embodiment, suitable for the process exerted one's influence using pulse current to molten steel solidification,
There is certain structural strength, so as to be hardly damaged, it is ensured that pulsed electrode 1, the safety of the pulse power 9, enable to pulse current
Insulation between ground and operating personnel, ensure that electric current does not dissipate, realize that distant insulating operates, ensure in high-temperature molten steel
Neighbouring long period of operation is indeformable without melting, and can for a long time be used for multiple times, ensure the security and continuity of produced on-site.
Electrode clamping mechanism in the present embodiment, does not change steel grades, it is not necessary to adds alloying element, does not change centre
Package production apparatus and technique, it is pollution-free to strand and equipment, it is that one kind is coagulated applied to pulse current to molten steel to personnel's non-hazardous
The new equipment of process Gu process is exerted one's influence.
Embodiment 7
With reference to Fig. 5, the device of the improvement micro-alloyed steel continuous casting process castability of the present embodiment, its structure and the base of embodiment 6
This is identical, further：The quantity of insulated bolt is two.
In the present embodiment, set two insulated bolts sequentially pass through respectively the other end of energization bar 301 connection sheet 302, absolutely
One end of edge block 5 and extension bar 6, and three is connected and fixed, it is ensured that energization bar 301 and extension bar 6 are close
The both sides for being fixed on collets 5, prevent energization bar 301 or extension bar 6 from being rotated along collets 5, that improves device can
By property.
Embodiment 8
With reference to Fig. 6, the device of the improvement micro-alloyed steel continuous casting process castability of the present embodiment, its structure and the base of embodiment 7
This is identical, further：The quantity of second bolt 8 is equal to two.
In the present embodiment, two the second bolts 8 are set, the connection sheet 302 of the one end of energization bar 301 passes through two the second bolts
8 are connected on a holding piece 202 of holder 2, it is ensured that energization bar 301 and holder 2 are tightly secured together, and are prevented
Energization bar 301 or holder 2 rotate, and improve the reliability of device.
Embodiment 10
With reference to Fig. 6, the device of the improvement micro-alloyed steel continuous casting process castability of the present embodiment, its structure and the base of embodiment 7
This is identical, further：The connection sheet 302 of the one end of energization bar 301 passes through second bolt 8 and corresponding first spiral shell
Bolt 7 is connected on a holding piece 202 of holder 2, it is ensured that energization bar 301 and holder 2 are tightly secured together, and are prevented
Only energization bar 301 or holder 2 rotate, and improve the reliability of device.
Embodiment 11
The device of the improvement micro-alloyed steel continuous casting process castability of the present embodiment, its structure is same as Example 1, and it is different
Part is：Alloy composition is different, and its main chemical compositions is (mass percent)：0.046%C, 0.67%Si, 1.01%
Mn, 0.023%P, 0.002%S, 17.16%Cr, 9.20%Ni, 0.75%Ti, 0.017%Al, apply pulse current in addition
When, the control of microalloy molten steel overheat is 35 DEG C, after 10 stove steel of continuous cast, does not occur the phenomenon of nozzle blocking.
Embodiment 12
The device of the improvement micro-alloyed steel continuous casting process castability of the present embodiment, its structure is same as Example 1, and it is different
Part is that when applying pulse current, the parameter of pulse current is：Pulse voltage 35.5V, pulse current：1800A, pulse frequency
Rate 2000Hz, after continuously pouring into a mould 10 stove steel, do not occur the phenomenon of nozzle blocking.
Embodiment 13
The device of the improvement micro-alloyed steel continuous casting process castability of the present embodiment, its structure is same as Example 1, and it is different
Part is that when applying pulse current, the parameter of pulse current is：Pulse voltage 16.3V, pulse current：1200A, pulse frequency
Rate 20000Hz, after continuously pouring into a mould 10 stove steel, do not occur the phenomenon of nozzle blocking.
It should be noted that micro alloyed steel can be C<0.25%wt mild steel, 0.25%≤C≤0.60%wt middle carbon
Steel and C>0.60%wt high-carbon steel, Ti elements is included in these mild steel, medium carbon steel and high-carbon steel, herein not one by one
Enumerate.
Schematically the present invention and embodiments thereof are described above, this describes no restricted, institute in accompanying drawing
What is shown is also one of embodiments of the present invention, and actual structure is not limited thereto.So if common skill of this area
Art personnel are enlightened by it, without departing from the spirit of the invention, without designing and the technical scheme for creativeness
Similar frame mode and embodiment, protection scope of the present invention all should be belonged to.
Claims (10)
- A kind of 1. device for improving micro-alloyed steel continuous casting process castability, it is characterised in that：Clamped including casting mechanism and electrode Mechanism；The casting mechanism includes ladle (11) and the tundish (12), and the ladle (12) is placed in above tundish (13), Ladle (11) inside is by long nozzle (12) with being connected inside tundish (13)；The electrode clamping mechanism includes：Columned pulsed electrode (1), when micro alloyed steel strand is poured into a mould using continuous casting process, the pulsed electrode (1) is placed in Apply pulse current in microalloy molten steel in tundish (13) and to microalloy molten steel；Holder (2), the holder (2) For clamping the pulsed electrode (1)；Energization part (3), one end of the energization part (3) is connected with the holder (2), described Energization part (3) is connected with the pulse power (9)；Extension bar (6), one end of the extension bar (6) are led to by collets (5) with described The other end connection of electric part (3).
- 2. the device according to claim 1 or 2 for improving micro-alloyed steel continuous casting process castability, it is characterised in that described The parameter of pulse current is：10~36V of pulse voltage, 100~2000A of pulse current, 1000~30000Hz of pulse frequency.
- 3. the device according to claim 2 for improving micro-alloyed steel continuous casting process castability, it is characterised in that：Micro- conjunction Jin Gangzhong includes Ti elements.
- 4. the device according to claim 3 for improving micro-alloyed steel continuous casting process castability, it is characterised in that：Apply pulse During electric current, the degree of superheat of microalloy molten steel is controlled at 20~40 DEG C.
- 5. the device according to claim 4 for improving micro-alloyed steel continuous casting process castability, it is characterised in that：Micro- conjunction C in Jin Gang<0.25%wt or 0.25%≤C≤0.60%wt or C>0.60%wt.
- 6. the device according to claim 5 for improving micro-alloyed steel continuous casting process castability, it is characterised in that：Micro alloyed steel The content of middle Ti elements is 0.10%wt-0.80%wt.
- 7. the device according to claim 6 for improving micro-alloyed steel continuous casting process castability, it is characterised in that：The clamping Part (2) includes two the semicircular ring with flanging, and the circular arc portion of two semicircular rings with flanging surrounds wheel flange (201), the folder The lateral surface that circle (201) is wrapped in pulsed electrode (1) is held, the corresponding tuck portion of two semicircular rings with flanging passes through the first spiral shell Bolt (7) connects, and forms holding piece (202).
- 8. the device according to claim 7 for improving micro-alloyed steel continuous casting process castability, it is characterised in that：The energization Part (3) includes energization bar (301) and is connected to the connection sheet (302) at energization bar (301) both ends；The energization bar (301) one The connection sheet (302) at end is connected on a holding piece (202) of holder (2) by the second bolt (8)；The energization bar (301) conducting strip (4) is connected with, the conducting strip (4) is provided with through hole, and conducting strip (4) is connected with the pulse power (9).
- 9. the device according to claim 8 for improving micro-alloyed steel continuous casting process castability, it is characterised in that：The electrode Clamping device also includes insulated bolt；The insulated bolt sequentially pass through energization bar (301) other end connection sheet (302), absolutely One end of edge block (5) and extension bar (6), and three is connected and fixed；The both ends of the pulsed electrode (1) are set respectively There is the stop nahlock that diameter is more than pulsed electrode (1) diameter；The pulsed electrode (1) is aluminium carbonaceous electrodes.
- 10. the device of the improvement micro-alloyed steel continuous casting process castability according to claim 1-9 any one, its feature exist In：The bottom of the tundish (13) is communicated with submersed nozzle (14), and the submersed nozzle (14) coordinates with stopper (10) and made With the barricade (15) and dam that mutual cooperation is provided between the internal submersed nozzle (14) of, tundish (13) and long nozzle (12) (16)。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711285140.8A CN107812902B (en) | 2017-12-07 | 2017-12-07 | A kind of device improving micro-alloyed steel continuous casting process castability |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711285140.8A CN107812902B (en) | 2017-12-07 | 2017-12-07 | A kind of device improving micro-alloyed steel continuous casting process castability |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107812902A true CN107812902A (en) | 2018-03-20 |
| CN107812902B CN107812902B (en) | 2019-04-23 |
Family
ID=61606593
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711285140.8A Active CN107812902B (en) | 2017-12-07 | 2017-12-07 | A kind of device improving micro-alloyed steel continuous casting process castability |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107812902B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115319037A (en) * | 2022-08-03 | 2022-11-11 | 北京科技大学 | Device and method for purifying non-metallic inclusions in continuous casting billet |
| CN115717210A (en) * | 2022-11-08 | 2023-02-28 | 北京科技大学 | Method for inhibiting titanium-containing steel fish formation phenomenon by using pulse current |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200996795Y (en) * | 2006-12-11 | 2007-12-26 | 马鞍山钢铁股份有限公司 | Electrode positioner of refining furnace |
| CN101850406A (en) * | 2010-06-30 | 2010-10-06 | 西安建筑科技大学 | Graphite electrode for applying pulse current to continuously casting tundish |
| CN101885042A (en) * | 2010-06-30 | 2010-11-17 | 西安建筑科技大学 | Electrode for applying pulse current to continuous casting tundish |
| CN102140565A (en) * | 2010-01-29 | 2011-08-03 | 上海大学 | Method for pollution-free deoxygenation refining by externally applying electric field to tundish |
| CN102310174A (en) * | 2011-09-07 | 2012-01-11 | 中国科学院金属研究所 | Method and device for improving metal solidification defects and refining solidification textures |
| JP2012055911A (en) * | 2010-09-07 | 2012-03-22 | Sumitomo Metal Ind Ltd | Method for producing continuously-cast slab |
-
2017
- 2017-12-07 CN CN201711285140.8A patent/CN107812902B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200996795Y (en) * | 2006-12-11 | 2007-12-26 | 马鞍山钢铁股份有限公司 | Electrode positioner of refining furnace |
| CN102140565A (en) * | 2010-01-29 | 2011-08-03 | 上海大学 | Method for pollution-free deoxygenation refining by externally applying electric field to tundish |
| CN101850406A (en) * | 2010-06-30 | 2010-10-06 | 西安建筑科技大学 | Graphite electrode for applying pulse current to continuously casting tundish |
| CN101885042A (en) * | 2010-06-30 | 2010-11-17 | 西安建筑科技大学 | Electrode for applying pulse current to continuous casting tundish |
| JP2012055911A (en) * | 2010-09-07 | 2012-03-22 | Sumitomo Metal Ind Ltd | Method for producing continuously-cast slab |
| CN102310174A (en) * | 2011-09-07 | 2012-01-11 | 中国科学院金属研究所 | Method and device for improving metal solidification defects and refining solidification textures |
Non-Patent Citations (1)
| Title |
|---|
| 顾武安: "中间包钢液施加电脉冲的冶金效果研究", 《钢铁钒钛》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115319037A (en) * | 2022-08-03 | 2022-11-11 | 北京科技大学 | Device and method for purifying non-metallic inclusions in continuous casting billet |
| CN115319037B (en) * | 2022-08-03 | 2024-05-14 | 北京科技大学 | Device and method for purifying nonmetallic inclusion in continuous casting billet |
| CN115717210A (en) * | 2022-11-08 | 2023-02-28 | 北京科技大学 | Method for inhibiting titanium-containing steel fish formation phenomenon by using pulse current |
| CN115717210B (en) * | 2022-11-08 | 2023-11-24 | 北京科技大学 | Method for inhibiting titanium-containing steel-bonded fish phenomenon by using pulse current |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107812902B (en) | 2019-04-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP1257673B1 (en) | Method for grain refining of steel, grain refining alloy for steel and method for producing grain refining alloy | |
| CN103882303B (en) | A kind of smelting process of gas protecting welding wire steel | |
| NO326731B1 (en) | grain refining alloy | |
| CN104862443A (en) | Smelting method for low-carbon low-silicon wire-welding steel | |
| CN103567661B (en) | The preparation method of titanium-steel composite board melting welding docking transition zone welding material | |
| CN102950392B (en) | Wire rod for production of pipeline submerged arc welding wires and method for manufacturing wire rod | |
| CN103273214A (en) | High-intensity welding wire for aluminum-zinc-magnesium-scandium alloy and preparing method thereof | |
| CN110184548B (en) | Method for refining solidification structure of high manganese steel continuous casting billet | |
| CN107812902A (en) | A kind of device for improving micro-alloyed steel continuous casting process castability | |
| CN102267021B (en) | Submerged arc welding wire for pipe line steel and method for manufacturing submerged arc welding wire | |
| CN108188579A (en) | A kind of method for laser welding of steel/Al dissimilar materials | |
| CN107267711B (en) | Molten steel alloying device and method of rotary blowing powder | |
| CN104476008A (en) | Welding wire for high-heat-input submerged-arc welding | |
| CN107999718B (en) | A method of improving micro-alloyed steel continuous casting process castability | |
| CN105803156B (en) | A kind of oxide control method for improving magnesium recovery rate | |
| CN108977612B (en) | Smelting method of high-strength atmospheric corrosion resistant bolt steel | |
| CN102909484A (en) | Cobalt-based surfacing welding wire | |
| CN104745961A (en) | Smelting method of 21-10Mn7Mo steel ingot | |
| CN101392308B (en) | Molten steel deoxygenation method for thinning solidification structure | |
| CN106282630B (en) | A kind of method for refining 800H corrosion resistant alloy ingot solidification tissues | |
| CN105057606B (en) | A kind of method for improving Cleanliness of Molten Steel and crystal grain thinning | |
| CN105779869A (en) | Internal quality control method of 30Mn tube bloom steel cast blanks | |
| CN107304458B (en) | A kind of hot-rolled steel and its manufacturing method, mooring cable and its manufacturing method | |
| CN109868371B (en) | Protection method of ultrasonic probe | |
| CN106756435A (en) | A kind of smelting process of welding wire steel |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |