CN107447163A - The apparatus and method that industry casts live ultrasonication molten iron - Google Patents
The apparatus and method that industry casts live ultrasonication molten iron Download PDFInfo
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- CN107447163A CN107447163A CN201710807271.1A CN201710807271A CN107447163A CN 107447163 A CN107447163 A CN 107447163A CN 201710807271 A CN201710807271 A CN 201710807271A CN 107447163 A CN107447163 A CN 107447163A
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- ultrasonic
- molten iron
- nodularization
- iron
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 127
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 60
- 238000000034 method Methods 0.000 title claims abstract description 33
- 238000002525 ultrasonication Methods 0.000 title claims abstract description 16
- 238000012545 processing Methods 0.000 claims abstract description 33
- 239000000523 sample Substances 0.000 claims abstract description 24
- 238000005266 casting Methods 0.000 claims abstract description 23
- 229910001141 Ductile iron Inorganic materials 0.000 claims abstract description 16
- 238000002844 melting Methods 0.000 claims abstract description 15
- 230000008018 melting Effects 0.000 claims abstract description 15
- 238000003723 Smelting Methods 0.000 claims abstract description 9
- 239000007788 liquid Substances 0.000 claims abstract description 8
- 239000000203 mixture Substances 0.000 claims description 12
- 238000011081 inoculation Methods 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 6
- 238000007670 refining Methods 0.000 claims description 6
- 238000005096 rolling process Methods 0.000 claims description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 5
- 230000006698 induction Effects 0.000 claims description 5
- 229910052748 manganese Inorganic materials 0.000 claims description 5
- 239000004576 sand Substances 0.000 claims description 5
- 239000010959 steel Substances 0.000 claims description 5
- 229910052802 copper Inorganic materials 0.000 claims description 4
- 239000010949 copper Substances 0.000 claims description 4
- 229910052702 rhenium Inorganic materials 0.000 claims description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 229910000519 Ferrosilicon Inorganic materials 0.000 claims description 3
- 229910000805 Pig iron Inorganic materials 0.000 claims description 3
- 230000007423 decrease Effects 0.000 claims description 3
- 230000003009 desulfurizing effect Effects 0.000 claims description 3
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 239000012535 impurity Substances 0.000 claims description 3
- 238000010079 rubber tapping Methods 0.000 claims description 3
- 238000007493 shaping process Methods 0.000 claims description 3
- 229910000616 Ferromanganese Inorganic materials 0.000 claims description 2
- 238000001816 cooling Methods 0.000 claims description 2
- DALUDRGQOYMVLD-UHFFFAOYSA-N iron manganese Chemical compound [Mn].[Fe] DALUDRGQOYMVLD-UHFFFAOYSA-N 0.000 claims description 2
- 239000004575 stone Substances 0.000 claims 1
- 229910052751 metal Inorganic materials 0.000 abstract description 7
- 239000002184 metal Substances 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 230000006911 nucleation Effects 0.000 abstract description 2
- 238000010899 nucleation Methods 0.000 abstract description 2
- 238000003756 stirring Methods 0.000 abstract description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 5
- 229910002804 graphite Inorganic materials 0.000 description 5
- 239000010439 graphite Substances 0.000 description 5
- 239000007789 gas Substances 0.000 description 4
- 239000011572 manganese Substances 0.000 description 4
- 229910001562 pearlite Inorganic materials 0.000 description 4
- 239000004411 aluminium Substances 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 238000000746 purification Methods 0.000 description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 230000035568 catharsis Effects 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 238000002604 ultrasonography Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- 239000011195 cermet Substances 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000007872 degassing Methods 0.000 description 1
- 210000001787 dendrite Anatomy 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000003325 follicular Effects 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 239000007770 graphite material Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 229910001338 liquidmetal Inorganic materials 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 230000000505 pernicious effect Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 238000000527 sonication Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 229910001845 yogo sapphire Inorganic materials 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C37/00—Cast-iron alloys
- C22C37/10—Cast-iron alloys containing aluminium or silicon
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D1/00—Treatment of fused masses in the ladle or the supply runners before casting
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C1/00—Refining of pig-iron; Cast iron
- C21C1/10—Making spheroidal graphite cast-iron
- C21C1/105—Nodularising additive agents
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/08—Making cast-iron alloys
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C37/00—Cast-iron alloys
- C22C37/04—Cast-iron alloys containing spheroidal graphite
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The present invention provides the apparatus and method that a kind of industry casts live ultrasonication molten iron.The device is made up of smelting apparatus, nodularization bag, transporter, ultrasonic processing apparatus and apparatus for pouring.Furnace charge uses smelting apparatus melting, the molten iron in nodularization bag after nodularization process obtains nodularization.Nodularization bag is transported to below ultrasonic processing apparatus by transporter, ultrasonic processing apparatus, which moves down, makes ultrasonic unit probe go deep into below the 500mm of melt liquid level 30 in nodularization bag and be ultrasonically treated to molten iron, adjust ultrasonic technique parameter, ultrasonic wave can produce cavitation bubble inside metal bath, play a part of stirring.Meanwhile cavitation bubble is formed about nucleus, nucleation rate increase, is fined tissue.The method and device of the present invention combines industry casting on-site actual situations, supersound process is more easily applied to production line, beneficial to batch processing, the spheroidal graphite cast-iron excellent in mechanical performance of acquisition.
Description
Technical field
The invention belongs to technical field of metal material preparation, is cast in particular to a kind of industry at live ultrasonic wave
The apparatus and method for managing molten iron.
Background technology
It is well known that the factor for influenceing casting product quality is a lot, such as moulding, technological process, raw material quality, worker
Quality, molten steel quality, Technology for Heating Processing, Mechanical processing of casting etc., but molten steel quality is an important factor for influenceing casting quality.Iron
Water has various pernicious gases and various nonmetal inclusions during melting, quenched, the various metallic elements of addition in molten iron
Due to factors such as material property, fusing point, density, granule sizes during thing, and some metallic elements of addition, it is difficult to ensure it
In molten iron uniform melt.Therefore, the research of molten iron purification and structural homogenity turns into the main direction of production premium casting.
Sonication techniques are by the ultrasonic wave that the molten metal of molten condition imports frequency height, energy is concentrated, having
Notable crystal grain thinning, the effect for improving material internal quality and performance.It is a kind of green, section that supersound process is carried out to liquid metal
Energy, environmentally friendly, efficient, safe and economic processing mode.
But industry casting site environment is complicated, molten iron temperature is up to 1500 DEG C, to the high temperature resistant and corrosion resistant of ultrasonic probe
It is high to lose performance requirement, traditional metal materials are difficult to meet to require, even if avoiding corroding using cermet, still suffer from processing,
Assembling is difficult and the problem of brittle failure easily occurs.And easy Vltrasonic device processing industry casting scene is large-scale to pour by applying
Iron clad aqueous fusion body, its sphere of action is extremely limited, and ultrasonic power decay is serious under high temperature action, it is difficult to effectively handles metal
Melt.In addition, also need to consider to carry out effective ultrasonication to molten iron in the case where not influenceing existing casting technique.Therefore,
It is convenient applied to production line, the ultrasonication molten iron device beneficial to batch processing to need badly in the prior art.
The content of the invention
In order to make up the deficiencies in the prior art, the present invention provides the device that a kind of industry casts live ultrasonication molten iron
And method.
The device is connected with apparatus for pouring and formed by smelting apparatus, nodularization bag, transporter, ultrasonic processing apparatus successively.
The ultrasonic processing apparatus include counterweight, support, cylinder, piston rod, apart from device for limiting, balancing pole, wind, heat-insulating shield,
Chain gearing, rolling bearing, rotating bar, ultrasonic transducer, ultrasonic transformer, ultrasonic unit probe and ultrasonic wave occur
Device.The cylinder is placed in cradle top and is secured to connect；Piston rod is connected with balancing pole, by controlling switching cylinder to make piston
Bar drives balancing pole to move up and down；It is welded on apart from device for limiting below the top plate of support, to control piston rod and balancing pole
Displacement；The side of balancing pole is counterweight to keep balancing pole horizontality, and opposite side passes through rolling bearing and connected with rotating bar
Connect；Rotating bar is connected with wind by chain gearing, drives rotating bar to rotate by the uniform velocity shaking wind；Rotating bar
The other end is connected with heat-insulating shield；Ultrasonic transducer, ultrasonic transformer and ultrasonic unit probe are placed in thermal insulation after being sequentially connected
The top of plate, described supersonic generator are connected with ultrasonic transducer.
Preferably, described smelting apparatus is medium-frequency induction furnace.
Preferably, described nodularization bag is " teapot bag " pattern.
Preferably, described transporter includes overhead traveling crane and fork truck.
Preferably, described apparatus for pouring includes pouring truck and device for sand coated iron mould casting mold.
Preferably, it is a diameter of being processed respectively at heat-insulating shield center 85mm and 240mm in the ultrasonic processing apparatus
90mm circular hole.
Preferably, described supersonic generator can connect two or more ultrasonic transducers, improve ultrasonic wave
Processing power and sphere of action.
Preferably, ultrasonic unit probe material is high strength graphite, diameter 20-50mm, length 200-600mm.
The ultrasonic unit probe of graphite material has the characteristics that high temperature resistant, the burn into of resistance to molten iron easy processing.
The method that industry casts live ultrasonication molten iron, described processing iron is claimed in another object of the present invention
The method of water is：Furnace charge is placed in melting in smelting apparatus, carries out spheroidising after melting in nodularization bag, will by transporter
Nodularization bag is transported to below ultrasonic processing apparatus, and ultrasonic processing apparatus, which moves down, makes ultrasonic probe stretch into melt liquid level in nodularization bag
Below 30-500mm is ultrasonically treated to the molten iron after nodularization, adjusts ultrasonic technique parameter, is made using the cavitation of ultrasonic wave
With the catharsis realized to molten iron.
More specifically, the method for the live ultrasonication molten iron of described industry casting concretely comprises the following steps：
S1. composition proportion：By weight percentage, C：3.5-3.9%, Si：1.7-2.1%, Mg：0.03-0.05%,
Cu：0.2-1.0%, Mn：0.3-0.6%, S ＜ 0.025%, P ＜ 0.06%, Re：0.012-0.015%, other impurities always contain
Amount≤0.02-0.05%, surplus Fe；
S2. furnace charge is matched：Using high-purity pig iron, low P low S steel scraps, foundry returns and iron filings, by S1 composition proportions as stove
Material；
S3. melting and refining：Molten iron is obtained using medium-frequency induction furnace melting batch, industrial manganese is added by S1 composition proportions
Iron, industrial ferrosilicon and the uniform melting of cathode copper, come out of the stove, tapping temperature is after desulfurizing and refining：1400-1480℃；
S4. spheroidising：From Z6S nodulizers, additional proportion 0.9%, its molten iron after being refined with step S3 is added
Enter and handled in nodularization bag, obtain molten iron after nodularization；
S5. nodularization bag is transported to ultrasonic unit probe lower section by transporter；
S6. turn clockwise switching cylinder, makes piston rod promote balancing pole to decline, and ultrasonic unit probe is stretched into nodularization
Melt liquid level 30-500mm in bag；
S7. supersonic generator switch is opened, adjusts ultrasonic technique parameter, described ultrasonic technique parameter：Frequency
For 15-25KHz, ultrasonic power 100-2000W, processing time 1-5min, applying mode applies to be continuous；
S8. 10 revs/min of wind is at the uniform velocity shaken, heat-insulating shield and ultrasonic unit is popped one's head in and is turned by chain gearing
It is dynamic；
S9. every 30 seconds of wind shaking direction is alternately once；
S10. to the end of molten iron is ultrasonically treated, supersonic generator switch, rotate counterclockwise switching cylinder, piston rod are closed
Drive balancing pole to rise, ultrasonic unit probe is risen to the nodularization side of wrapping 200-300mm；
S11. inoculation：From 75Si-Fe inovulants, by the way of current-following inoculation, inovulant granularity is 0.2-
0.5mm, addition 0.3-0.5kg/min, total amount are no more than 0.6%；
S12. molten iron after inoculation is injected into device for sand coated iron mould casting-up shaping, pouring temperature is 1350-1440 DEG C, cold
But unpack afterwards, obtain ductile cast iron casting.
For the present invention during ultrasonication, ultrasonic wave can produce cavitation bubble, cavitation follicular rupture inside metal bath
Caused high pressure, dendrite can be crushed, plays a part of stirring.Meanwhile the increase of cavitation bubble and the evaporation of liquid can be taken away greatly
The heat of amount, so as to form local overcooling, cavitation bubble is formed about nucleus, nucleation rate increase, be fined metal structure,
So as to obtain high-performance nodular cast iron.
Compared with prior art, the beneficial effects of the present invention are：
(1) present invention carries out ultrasonication in nodularization bag to molten iron, and using the cavitation of ultrasonic wave, molten iron is risen
To the catharsis of slagging-off, degasification；
(2) molten iron can significantly refine the size of graphite nodule in Microstructure of Ductile Iron in ultrasonication nodularization bag,
Reduce pearlite piece interlamellar spacing, improve structural homogenity, improve the mechanical property of spheroidal graphite cast-iron；
(3) industry casting on-site actual situations are combined, industry provided by the invention casts live ultrasonication molten iron
Device, supersound process is more easily applied to production line, be advantageous to batch processing.
Brief description of the drawings
Fig. 1 is ultrasonic processing apparatus structural representation of the present invention；
In figure：1st, counterweight, 2, support, 3, cylinder, 4, piston rod, 5, apart from device for limiting, 6, balancing pole, 7, wind,
8th, heat-insulating shield, 9, chain gearing, 10, rolling bearing, 11, rotating bar, 12, ultrasonic transducer, 13, ultrasonic transformer, 14, super
Acoustic wave device is popped one's head in, and 15, supersonic generator.
Fig. 2 is that the influence figure to ductile cast iron casting graphite nodule size is ultrasonically treated in the embodiment of the present invention 2；
Fig. 3 is that the influence figure to ductile cast iron casting pearlite lamellar spacing is ultrasonically treated in the embodiment of the present invention 2.
Embodiment
The present invention is described in detail below by accompanying drawing 1-3 and specific embodiment, but not limited the scope of the invention.Such as without spy
Different explanation, experimental method of the present invention are that conventional method, equipment therefor, equipment, material, reagent etc. can be from business
Channel obtains.
Embodiment 1
Industry casts the device of live ultrasonication molten iron, successively by smelting apparatus, nodularization bag, transporter, ultrasound
Processing unit connects composition with apparatus for pouring.The ultrasonic processing apparatus includes counterweight 1, support 2, cylinder 3, piston rod 4, distance
Device for limiting 5, balancing pole 6, wind 7, heat-insulating shield 8, chain gearing 9, rolling bearing 10, rotating bar 11, ultrasonic waves
Can device 12, ultrasonic transformer 13, ultrasonic unit probe 14 and supersonic generator 15.Described cylinder 3 is placed in the top of support 2, adopts
Fixed with threaded connection；Cylinder piston rod 4 is connected with balancing pole 6 using welding manner, by controlling switching cylinder cylinder is lived
Stopper rod 4 drives balancing pole to move up and down；It is welded on apart from device for limiting 5 below the top plate of support 2, to control piston rod 4 and balance
The displacement of bar 6；The side of balancing pole 6 be counterweight to keep balancing pole horizontal, opposite side passes through rolling bearing and rotating bar 11
Connection；Rotating bar 11 is connected with wind 7 using chain gearing 9, and 11 turns of rotating bar is driven by the uniform velocity shaking wind
It is dynamic；The lower section of rotating bar 11 is threadedly connected with heat-insulating shield 8；It is straight apart from center 85mm and the 240mm processing of heat-insulating shield 8
Footpath is 90mm circular hole；The one knot that ultrasonic transducer 12, ultrasonic transformer 13 and ultrasonic unit probe 14 are connected through a screw thread
Set up above heat-insulating shield 8.
Embodiment 2
S1. composition proportion：By weight percentage, C：3.5-3.9%, Si：1.7-2.1%, Mg：0.03-0.05%,
Cu：0.2-1.0%, Mn：0.3-0.6%, S ＜ 0.025%, P:＜ 0.06%, Re：0.012-0.015%, other impurities always contain
Amount≤0.02-0.05%, surplus Fe；
S2. furnace charge is matched：The low S steel scraps 5% of low P and iron filings 10%, foundry returns 35%, remaining is high-purity pig iron, by step
S1 composition proportions are as furnace charge；
S3. melting and refining：Molten iron is obtained using medium-frequency induction furnace melting batch, work is added by step S1 composition proportions
Industry ferromanganese, industrial ferrosilicon and the uniform melting of cathode copper, come out of the stove, tapping temperature is after desulfurizing and refining：1450℃；
S4. spheroidising：From Z6S nodulizers, additional proportion 0.9%, molten iron after nodularization is obtained；
S5. nodularization bag is transported to the lower section of ultrasonic unit probe 14, ultrasonic unit 14 diameters of probe using transporter
30mm, length 500mm；
S6. dextrorotation rotaring cylinder 3 switchs, and piston rod 4 promotes balancing pole 6 to decline, and stretches into ultrasonic unit probe 14
Melt liquid level 200mm in nodularization bag；
S7. open supersonic generator 15 to switch, adjust ultrasonic technique parameter, described ultrasonic technique parameter：
18.6KHz, ultrasonic power 600W, processing time 3min, applying mode apply to be continuous；
S8. wind 7 is at the uniform velocity shaken with 10 revs/min of speed, heat-insulating shield 8 and ultrasonic wave is made by chain gearing 9
Device probe 14 rotates, and expands and is ultrasonically treated scope；
S9. every 30 seconds of the shaking direction of wind 7 is alternately once；
S10. to the end of molten iron is ultrasonically treated, close supersonic generator 15 and switch, rotate counterclockwise cylinder 3 switchs, living
Stopper rod 4 drives balancing pole 6 to rise, and ultrasonic unit probe 14 is risen at the nodularization side of wrapping 300mm；
S11. inoculation：From 75Si-Fe inovulants, by the way of current-following inoculation, inovulant granularity is 0.2-
0.5mm, addition 0.3-0.5kg/min, total amount are no more than 0.6%；
S12. molten iron is injected into device for sand coated iron mould casting-up shaping, pouring temperature is 1410 DEG C, is unpacked after cooling, obtains ball
Black iron casting.
Embodiment 3
The present embodiment is different from the technological parameter for differing only in supersound process of embodiment 2, ultrasonic unit probe 14
Stretch into melt liquid level 500mm in nodularization bag, ultrasonic technique parameter：Frequency is 25KHz, ultrasonic power 2000W, processing time
For 1min, applying mode applies to be continuous.
Performance test is carried out to the spheroidal graphite cast-iron that embodiment 2 obtains, after testing, the spheroidal graphite cast-iron composition of acquisition is C：
3.63%, Si：1.93%, Mg：0.05%, Cu：0.46%, Mn：0.52%, S：0.014%, P：0.036%, Re：
0.013%, surplus Fe.In nodularization bag to molten iron implement ultrasonication purification after, in molten iron aluminium element content by
0.0073% drops to 0.0031%.The reason for aluminium content reduces in molten iron in nodularization bag after sonicated purification, it is former
Some alundum (Al2O3) field trashes are excluded, so that aluminium content is remarkably decreased.And percent defective drops because being mingled with, caused by slag inclusion
Low 70%.Gas content is as shown in table 1 in molten iron before and after supersound process, and after supersound process, gas content significantly drops in molten iron
It is low.
Table 1 is ultrasonically treated gas content in front and rear molten iron
After the influence to ductile cast iron casting graphite nodule size is ultrasonically treated as shown in Fig. 2 being ultrasonically treated, graphite nodule size
Substantially refined.After the influence to ductile cast iron casting pearlite lamellar spacing is ultrasonically treated as shown in figure 3, being ultrasonically treated,
Microscopic structure medium pearlite lamellar spacing reduces, crystal grain refinement.Ductile cast iron casting mechanical property such as the institute of table 2 after supersound process
Show, after supersound process, the intensity of ductile cast iron casting is 862-880MPa, elongation 4.9-6.7%, higher than not applying ultrasound
The ductile cast iron casting intensity 788MPa of processing, elongation 2.7%.
Ductile cast iron casting mechanical property after table 2 is ultrasonically treated
Claims (10)
1. industry casts the device of live ultrasonication molten iron, it is characterised in that the device is successively by smelting apparatus, nodularization
Bag, transporter, ultrasonic processing apparatus and apparatus for pouring connect composition；
The cylinder (3) of the ultrasonic processing apparatus is placed at the top of support (2) and is secured to connect；Piston rod (4) and balancing pole (6)
Connection, by controlling cylinder (3) switch to make piston rod (4) drive balancing pole (6) to move up and down；Welded apart from device for limiting (5)
Below the top plate of support (2), to control the displacement of piston rod (4) and balancing pole (6)；The side of balancing pole (6) be with
To keep balancing pole horizontality, opposite side is connected weight (1) by rolling bearing (10) with rotating bar (11)；Rotating bar (11) with
Wind (7) is connected by chain gearing (9), drives rotating bar (11) to rotate by the uniform velocity shaking wind (7)；Rotate
Bar (11) other end is connected with heat-insulating shield (8)；Ultrasonic transducer (12), ultrasonic transformer (13) and ultrasonic unit probe
(14) top of heat-insulating shield (8) is placed in after being sequentially connected, supersonic generator (15) is connected with ultrasonic transducer (12).
2. device according to claim 1, it is characterised in that described smelting apparatus is medium-frequency induction furnace.
3. device according to claim 1, it is characterised in that described nodularization bag is " teapot bag " pattern.
4. device according to claim 1, it is characterised in that described transporter includes overhead traveling crane and fork truck.
5. device according to claim 1, it is characterised in that described apparatus for pouring includes pouring truck and device for sand coated iron mould is cast
Type.
6. device according to claim 1, it is characterised in that in the ultrasonic processing apparatus, in heat-insulating shield (8)
A diameter of 90mm circular hole is processed at the heart 85mm and 240mm respectively.
7. device according to claim 1, it is characterised in that described supersonic generator (15) can connect two or two
Individual above ultrasonic transducer (14).
8. device according to claim 1, it is characterised in that described ultrasonic unit probe (14) material is high intensity stone
Ink, diameter 20-50mm, length 200-600mm.
9. a kind of method that the live ultrasonication molten iron of industry casting is carried out using claim 1 described device, its feature are existed
In furnace charge is placed in into melting in smelting apparatus, carries out spheroidising after melting in nodularization bag, is turned nodularization bag by transporter
It is transported to below ultrasonic processing apparatus, ultrasonic processing apparatus, which moves down, makes ultrasonic unit probe stretch into melt liquid level 30- in nodularization bag
Below 500mm is ultrasonically treated to the molten iron after nodularization, adjusts ultrasonic technique parameter, molten iron is purified.
10. according to the method for claim 9, it is characterised in that specifically include following steps：
S1. composition proportion：By weight percentage, C：3.5-3.9%, Si：1.7-2.1%, Mg：0.03-0.05%, Cu：
0.2-1.0%, Mn：0.3-0.6%, S ＜ 0.025%, P ＜ 0.06%, Re：0.012-0.015%, other impurities total content≤
0.02-0.05%, surplus Fe；
S2. furnace charge is matched：Using high-purity pig iron, low P low S steel scraps, foundry returns and iron filings, by S1 composition proportions as furnace charge；
S3. melting and refining：Molten iron is obtained using medium-frequency induction furnace melting batch, by S1 composition proportions add industrial ferromanganese,
The industrial uniform melting of ferrosilicon and cathode copper, comes out of the stove, tapping temperature is after desulfurizing and refining：1400-1480℃；
S4. spheroidising：From Z6S nodulizers, additional proportion 0.9%, its molten iron after being refined with step S3 is added into ball
Change and handled in bag, obtain molten iron after nodularization；
S5. nodularization bag is transported to below ultrasonic unit probe (14) by transporter；
S6. dextrorotation rotaring cylinder (3) switchs, and makes piston rod (4) promote balancing pole (6) to decline, ultrasonic unit is popped one's head in
(14) melt liquid level 30-500mm in nodularization bag is stretched into；
S7. supersonic generator (15) switch is opened, adjusts ultrasonic technique parameter, described ultrasonic technique parameter：Frequency
For 15-25KHz, ultrasonic power 100-2000W, processing time 1-5min, applying mode applies to be continuous；
S8. (7) 10 revs/min of wind is at the uniform velocity shaken, heat-insulating shield (8) and ultrasonic unit are made by chain gearing (9)
Probe (14) rotates；
S9. every 30 seconds of wind (7) shaking direction is alternately once；
S10. to the end of molten iron is ultrasonically treated, supersonic generator (15) switch is closed, rotate counterclockwise cylinder (3) switch is living
Stopper rod (4) drives balancing pole (6) to rise, and ultrasonic unit probe 14 is risen to the nodularization side of wrapping 200-300mm；
S11. inoculation：From 75Si-Fe inovulants, by the way of current-following inoculation, inovulant granularity is 0.2-0.5mm,
Addition 0.3-0.5kg/min, total amount are no more than 0.6%；
S12. molten iron after inoculation is injected into device for sand coated iron mould casting-up shaping, pouring temperature is 1350-1440 DEG C, after cooling
Unpack, obtain ductile cast iron casting.
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| CN109666773A (en) * | 2019-01-29 | 2019-04-23 | 大连交通大学 | The method for generating spherical graphite without using nodulizer |
| CN109676115A (en) * | 2019-01-23 | 2019-04-26 | 上海理工大学 | ULTRASONIC COMPLEX device applied to aluminium-magnesium alloy melt processing |
| CN109750131A (en) * | 2019-01-29 | 2019-05-14 | 大连交通大学 | The method that ultrasonic wave auxiliary improves spheroidal graphite cast-iron pregnant effect |
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| CN114247874A (en) * | 2020-09-25 | 2022-03-29 | 通用汽车环球科技运作有限责任公司 | Aluminum casting using ultrasonic technology |
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