CN109482844A - Complex precise casting fine grain casting device and method - Google Patents
Complex precise casting fine grain casting device and method Download PDFInfo
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- CN109482844A CN109482844A CN201910000759.2A CN201910000759A CN109482844A CN 109482844 A CN109482844 A CN 109482844A CN 201910000759 A CN201910000759 A CN 201910000759A CN 109482844 A CN109482844 A CN 109482844A
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- metal shell
- electromagnetic agitation
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- 238000005266 casting Methods 0.000 title claims abstract description 79
- 238000000034 method Methods 0.000 title claims abstract description 24
- 239000002184 metal Substances 0.000 claims abstract description 33
- 229910052751 metal Inorganic materials 0.000 claims abstract description 33
- 238000013019 agitation Methods 0.000 claims abstract description 32
- 244000035744 Hura crepitans Species 0.000 claims abstract description 20
- 238000004321 preservation Methods 0.000 claims abstract description 17
- 239000000498 cooling water Substances 0.000 claims abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 22
- 229910045601 alloy Inorganic materials 0.000 claims description 21
- 239000000956 alloy Substances 0.000 claims description 21
- 230000005284 excitation Effects 0.000 claims description 18
- 238000001816 cooling Methods 0.000 claims description 8
- 238000003756 stirring Methods 0.000 claims description 5
- 230000009471 action Effects 0.000 claims description 4
- 230000006698 induction Effects 0.000 claims description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 230000002457 bidirectional effect Effects 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims 1
- 238000007711 solidification Methods 0.000 abstract description 11
- 230000008023 solidification Effects 0.000 abstract description 11
- 239000007769 metal material Substances 0.000 abstract description 7
- 238000005495 investment casting Methods 0.000 abstract description 2
- 206010001497 Agitation Diseases 0.000 description 22
- 239000013078 crystal Substances 0.000 description 7
- 230000008569 process Effects 0.000 description 6
- 238000007670 refining Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000011160 research Methods 0.000 description 4
- 229910000851 Alloy steel Inorganic materials 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000006911 nucleation Effects 0.000 description 3
- 238000010899 nucleation Methods 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 210000001787 dendrite Anatomy 0.000 description 2
- 230000005672 electromagnetic field Effects 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 208000037656 Respiratory Sounds Diseases 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000009749 continuous casting Methods 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000005669 field effect Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000000048 melt cooling Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 229910000601 superalloy Inorganic materials 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
- B22D27/02—Use of electric or magnetic effects
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
- B22D27/04—Influencing the temperature of the metal, e.g. by heating or cooling the mould
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
Abstract
The present invention relates to metal material fields, disclose a kind of complex precise casting fine grain casting device and method, mainly include furnace chamber (1), rotating magnetic field generator (2), electromagnetic agitation inductor (3) and temperature controller (4), the output end of the rotating magnetic field generator (2) is connect with the electromagnetic agitation inductor (3), casting (6) in input terminal connection heat preservation sandbox (5) of the temperature controller (4), described heat preservation sandbox (5) periphery is enclosed with the metal shell (8) for being connected with recirculated cooling water (7), the electromagnetic agitation inductor (3) is mounted on the metal shell (8) periphery and the two is not in contact with each other.Compared with prior art, the present invention solves the problems, such as that the thick big position of precision casting and thin-walled position are difficult to refine, to obtain whole thinning solidification structure.
Description
Technical field
The present invention relates to technical field of metal material preparation, in particular to a kind of electromagnetic agitation is in conjunction with quick solidifying phase
Complex precise casting fine grain casting device and method.
Background technique
The solidified structure control of metal material is the key realizing metal material tissue refinement and homogenizing, and is considered as
The important means for improving its mechanical property and processing performance is always the weight of target and research that metal material preparation process is pursued
Want one of project.In the method for numerous control process of setting, Electromagnetic Control solidification is received much attention.Pass through change
The parameters such as type, mode, intensity, the time of electromagnetic field effect are implemented process of setting in conjunction with the cooling procedure of control solidification
Control.It is alternation Electromagnetic Continuous field that Electromagnetic Control solidification is applied at most at present, obtains extensive use in the continuous casting of steel.Continuously
Magnetic field mainly generates function composite by electromagnetic stirring, can refine crystal grain, and effectively avoid casting flaw.
Fine grain foundry engieering is by controlling common full form casting process, the Nucleation Mechanism of reinforced alloys, in casting process
In be that alloy forms mass crystallization core, and crystal grain is prevented to grow up, so that it is equal less than 1.6mm to obtain average grain size
Even, tiny, isotropic equiax crystal casting, more typical fine grain casting grain size is Unite States Standard ASTM0~2 grade.
Fine grain is cast in crystal grain refinement simultaneously, especially the primary carbide in refining alloy and γ ' hardening constituent, and improve its form and
It is distributed, and then improves alloy property.Therefore, the outstanding advantages of fine grain casting are to greatly improve casting in middle low temperature (≤760
DEG C) under the conditions of low cycle fatigue property, be substantially reduced the dispersion degree of mechanical castings data, thus improve casting design hold
Limit.Meanwhile the technology also improves the tensile property and enduring quality of casting to a certain extent, and casting is made to have good heat
Process performance.Fine grain foundry engieering can also improve the machining property of alloy-steel casting, reduce screw hole and knife-edge sharpened edge
Etc. generate processing crackle potential danger.Therefore, integral fine crystal Casting Technology has become medium temperature and used below zero
Component manufacturing technology is crucial.
Industrially developed country, the especially U.S. and Germany have begun to fine grain casting early in the 70's ends of 20th century
The research and application of technology, middle and later periods the 80's of 20th century tend to be mature, and the technology is in fields such as Aeronautics and Astronautics at present
It is widely applied.As Howmet company, the U.S. using fine grain foundry engieering successfully manufactured IN792MOD5A, Mar-M247,
The alloys integral turbine such as IN713C, IN718, makes the low-cycle fatigue life of turbine improve 2~3 times.Germany, France exist
Fine grain integral turbine casting is also used in new model aero-engine.
The country studies fine grain foundry engieering and starts to walk since the 80's ends of 20th century, by " eight or five " and " 95 "
The research and application of period has carried out compared with systematic research alloy fine grain casting technique, but answers in fields such as aero-engines
With still not extensively.
Summary of the invention
Goal of the invention: aiming at the problems existing in the prior art, the present invention provides a kind of complex precise casting fine grain casting
Device and method solves the problems, such as that the thick big position of precision casting and thin-walled position are difficult to refine, to obtain whole refinement solidification group
It knits.
Technical solution: the present invention provides a kind of complex precise casting fine grain casting devices, mainly include furnace chamber, rotary magnetic
Field generator, electromagnetic agitation inductor, metal shell and temperature controller, the output end of the rotating magnetic field generator and the electromagnetism
Inductor connection is stirred, the casting in the input terminal connection heat preservation sandbox of the temperature controller, the heat preservation sandbox periphery is enclosed with
It is connected with the metal shell of cooling water, the electromagnetic agitation inductor is mounted on the metal shell periphery and the two is not in contact with each other.
The water inlet of the metal shell is located at its lower sidewall, and the water inlet and the water outlet are symmetrical arranged in axle center.
Preferably, the water inlet of the metal shell is located at its lower sidewall, and water outlet is located at its side wall upper part, and described
Water inlet and the water outlet are symmetrical arranged in axle center.
Preferably, the outer wall of the heat preservation sandbox is tightly attached to the inner wall of the metal shell.
Preferably, the electromagnetic agitation inductor is the endless metal block for being enclosed in the metal shell periphery.
Preferably, the metal shell is red copper material.
Preferably, the shape matching of the heat preservation sandbox, the metal shell and the electromagnetic agitation inductor.
The present invention also provides a kind of complex precise casting fine grain casting methods, comprising the following steps: S1: using vacuum sense
Fine grain foundry furnace is answered to melt master alloy ingot, vacuum degree is maintained at 1 × 10 in furnace-2 More than, 200 DEG C or so the refinings 3 more than fusing point
~7 minutes, until bath surface is clean；S2: after cooling standing by melt cast into heat preservation sandbox, pouring temperature
It is 50~100 DEG C；S3: after melt is all poured into heat preservation sandbox, the recirculated cooling water in the metal shell is opened rapidly
System, water velocity 30-50ml/s；S4: after cast product surface layer temperature reaches Mushy Zone, rotating excitation field is opened
Device, control electromagnetic agitation inductor generate rotating excitation field, by controlling the rotating magnetic field generator, control the rotating excitation field
Exciting current be 150~300A, excitation frequency be 5~20Hz, action time be 5~30 minutes；S5: casting furnace cooling,
After the rotating excitation field stops stirring, turns off recirculated cooling water, finally obtain fine grain casting.
Preferably, in the S4, the rotating magnetic field generator can control electromagnetic agitation inductor generate it is unidirectional or
Bidirectional rotary magnetic field, the forward and reverse magnetic field rotating time in bidirectional rotation electromagnetic field are 20~40 seconds, commutating period 2~5 seconds.
The utility model has the advantages that the method for the present invention makes to generate induction inside melt using the rotating excitation field that rotating magnetic field generator applies
Electric current, the magnetic field interaction that this induced current is generated with electromagnetic agitation inductor again generate electromagnetic force, drive molten metal
Rotary motion becomes effective forming core core so that the nucleus at die wall be washed away, and increases nucleation rate, and then refine casting
Solidified structure.Meanwhile in melt cooling process, circulating water cooling system is opened, cooling velocity is controlled by water velocity, is absorbed
Amount of heat achievees the purpose that cool down ingot casting rapidly.Apparatus of the present invention are by rotating magnetic field generator, electromagnetic agitation inductor, temperature
Control instrument and circulating water cooling system composition.Method and apparatus of the present invention can be used for the metal materials such as high temperature alloy, high-alloy steel
Expect the casting of complex precise casting fine grain, it being capable of refining alloy solidified structure.
Compared with prior art, the present invention has the following advantages and effects: present invention incorporates quick solidifications and electromagnetism to stir
The characteristics of mixing, melt take away amount of heat by cooling water, and make melt by magnetic field agitation temperature is uniform everywhere, thus can
Heat constantly is taken away, melt is avoided temperature gradient occur, makes melt uniform throughout forming core, improves nucleation rate, refines crystal grain.Together
When fuse or fracture under function composite by electromagnetic stirring dendrite, and then inhibit dendrite, promote forming core.Furthermore with skill of the present invention
Art also can be reduced segregation, shrinkage cavity and it is loose the defects of generation, improve ingot solidification tissue.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of complex precise casting fine grain casting device in the present invention；
Fig. 2 is that the present invention and conventional cast K418(are left) the cross-sectional metallographic tissue contrast of high temperature alloy Φ 100mm ingot casting (right side)
Schematic diagram；
Fig. 3 is micro- group of alloy after the present invention and conventional cast (left side) Mar-246 high temperature alloy large thin wall casting (right side) solidification
The contrast schematic diagram knitted.
Specific embodiment
The present invention is described in detail with reference to the accompanying drawing.
Embodiment 1:
The complex precise casting fine grain casting device that present embodiments provide for a kind of electromagnetic agitations in conjunction with quick solidifying phase, such as
Shown in Fig. 1, mainly outside the metal by furnace chamber 1, rotating magnetic field generator 2, electromagnetic agitation inductor 3, temperature controller 4 and red copper material
Shell 8 forms, and rotating magnetic field generator 2 is used to adjust the excitation frequency and exciting current of rotating excitation field；Rotating magnetic field generator 2
Output end is connect with electromagnetic agitation inductor 3, and the casting 6 in the input terminal connection heat preservation sandbox 5 of temperature controller 4, temperature controller 4 can supervise
6 skin temperatures of refining temperature, pouring temperature and casting are surveyed, and then provide information for rotating excitation field application time；Keep the temperature 5 periphery of sandbox
It is enclosed with the metal shell 8 for being connected with recirculated cooling water 7, the water inlet 801 of metal shell 8 is located at its lower sidewall, water outlet 802
Positioned at its side wall upper part, and water inlet 801 and water outlet 802 are symmetrical arranged in axle center；The outer wall of heat preservation sandbox 5 is tightly attached to metal
The inner wall of shell 8；Electromagnetic agitation inductor 3 is mounted on 8 periphery of metal shell and the two is not in contact with each other, electromagnetic agitation inductor 3
It is preferable to use the endless metal block for being enclosed in 8 periphery of metal shell, heat preservation sandbox 5, metal shell 8 and electromagnetic agitation inductors
3 shape matching.
Embodiment 2:
The complex precise casting that present embodiments provide for a kind of electromagnetic agitations using in embodiment 1 in conjunction with quick solidifying phase
The method that part fine grain casting device is cast:
K418 nickel base superalloy is melted to 1550 DEG C in vacuum induction melting furnace and is refined 5 minutes, is then cooled to
It is poured into the heat preservation sandbox 5 for being placed in annular electromagnetic agitation inductor 3 after 1420 DEG C (75 DEG C of degrees of superheat), and opening metal immediately
Recirculated cooling water 7 in shell 8, water velocity 35ml/s detect that 6 surface temperature of casting is down to 1345 DEG C to temperature controller 4
Shi Kaiqi rotating magnetic field generator 2 solidifies alloy melt under the rotating excitation field effect that electromagnetic agitation inductor 3 generates.It is real
Rotating excitation field electric current is 250A when testing, and frequency 10Hz, action time is 15 minutes.
Fig. 1 is that the present invention and conventional cast K418(are left) the cross-sectional metallographic tissue contrast of high temperature alloy Φ 100mm ingot casting.
As it can be seen that thick big ingot solidification tissue is integrally refined, and whole cross section grain size distribution is uniform, the heart using present invention process
Portion's crystal grain is less than 0.5mm.
Embodiment 3:
The complex precise casting that present embodiments provide for a kind of electromagnetic agitations using in embodiment 1 in conjunction with quick solidifying phase
The method that part fine grain casting device is cast:
Mar-246 high temperature alloy is melted to 1580 DEG C in vacuum induction melting furnace and is refined 5 minutes, is then cooled to 1455
In being poured into the heat preservation sandbox 5 for being placed in annular electromagnetic agitation inductor 3 after DEG C (100 DEG C of the degree of superheat) and (be preheating to 1050 DEG C),
And the recirculated cooling water 7 in opening metal shell 8, water velocity 50ml/s detect 6 surface of casting to temperature controller 4 immediately
Temperature opens rotating magnetic field generator 2, the rotating excitation field for generating alloy melt in electromagnetic agitation inductor 3 when being down to 1355 DEG C
The lower solidification of effect.Rotating excitation field electric current is 300A when experiment, and frequency 15Hz, action time is 20 minutes.
Fig. 2 is micro- group of alloy after the present invention and the solidification of conventional cast (left side) Mar-246 high temperature alloy large thin wall casting
The comparison knitted.6 outer diameter of casting is 330mm, thin-walled 2mm, thick big position 20mm.As it can be seen that casting 6 is thick big using present invention process
Position grain refining effect is obvious, and crystallite dimension is less than 3mm.
Embodiment the result shows that, method and apparatus of the present invention can be used for the metal materials such as high temperature alloy, high-alloy steel
The fine grain casting for expecting complex precise casting and large thin-wall intricate casting, being capable of refining alloy solidified structure.
The technical concepts and features of the respective embodiments described above only to illustrate the invention, its object is to allow be familiar with technique
People can understand the content of the present invention and implement it accordingly, it is not intended to limit the scope of the present invention.It is all according to this hair
The equivalent transformation or modification that bright Spirit Essence is done, should be covered by the protection scope of the present invention.
Claims (8)
1. a kind of complex precise casting fine grain casting device, it is characterised in that: mainly include furnace chamber (1), rotating magnetic field generator
(2), electromagnetic agitation inductor (3) and temperature controller (4), the output end of the rotating magnetic field generator (2) and the electromagnetic agitation
The input terminal connection of inductor (3) connection, the temperature controller (4) keeps the temperature the casting (6) in sandbox (5), the heat preservation sandbox (5)
Periphery is enclosed with the metal shell (8) for being connected with recirculated cooling water (7), and the electromagnetic agitation inductor (3) is mounted on the metal
Shell (8) is peripheral and the two is not in contact with each other.
2. complex precise casting fine grain casting device according to claim 1, which is characterized in that the metal shell (8)
Water inlet (801) be located at its lower sidewall, water outlet (802) is located at its side wall upper part, and the water inlet (801) with it is described
Water outlet (802) is symmetrical arranged in axle center.
3. complex precise casting fine grain casting device according to claim 1, which is characterized in that the heat preservation sandbox (5)
Outer wall be tightly attached to the inner walls of the metal shell (8).
4. complex precise casting fine grain casting device according to any one of claim 1 to 3, which is characterized in that described
Electromagnetic agitation inductor (3) is the endless metal block for being enclosed in the metal shell (8) periphery.
5. complex precise casting fine grain casting device according to any one of claim 1 to 3, which is characterized in that described
Metal shell (8) is red copper material.
6. complex precise casting fine grain casting device according to any one of claim 1 to 3, which is characterized in that described
Keep the temperature the shape matching of sandbox (5), the metal shell (8) and the electromagnetic agitation inductor (3).
7. a kind of complex precise casting fine grain casting method, which comprises the following steps:
S1: master alloy ingot is melted using vacuum induction fine grain foundry furnace, vacuum degree is maintained at 1 × 10 in furnace-2 More than, in fusing point
Above 200 DEG C or so refine 3~7 minutes, until bath surface is clean；
S2: after cooling standing by melt cast into heat preservation sandbox (5), pouring temperature is 50~100 DEG C；
S3: after melt is all poured into heat preservation sandbox (5), the recirculated cooling water in the metal shell (8) is opened rapidly
(7), water velocity 30-50ml/s；
S4: it after casting (6) skin temperature reaches Mushy Zone, opens rotating magnetic field generator (2), controls electromagnetic agitation sense
It answers device (3) to generate rotating excitation field, by controlling the rotating magnetic field generator (2), controls the exciting current of the rotating excitation field
For 150~300A, excitation frequency is 5~20Hz, and action time is 5~30 minutes；
S5: casting (6) furnace cooling turns off recirculated cooling water (7) after the rotating excitation field stops stirring, finally obtains thin
Brilliant casting.
8. complex precise casting fine grain casting method according to claim 7, it is characterised in that: described in the S4
Rotating magnetic field generator (2) can control electromagnetic agitation inductor (3) and generate one-way or bi-directional rotating excitation field, bidirectional rotation electromagnetism
The forward and reverse magnetic field rotating time in is 20~40 seconds, commutating period 2~5 seconds.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910000759.2A CN109482844A (en) | 2019-01-02 | 2019-01-02 | Complex precise casting fine grain casting device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910000759.2A CN109482844A (en) | 2019-01-02 | 2019-01-02 | Complex precise casting fine grain casting device and method |
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| CN109482844A true CN109482844A (en) | 2019-03-19 |
Family
ID=65712207
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| CN201910000759.2A Pending CN109482844A (en) | 2019-01-02 | 2019-01-02 | Complex precise casting fine grain casting device and method |
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|---|---|---|---|---|
| JP2000343202A (en) * | 1999-05-28 | 2000-12-12 | Chuo Spring Co Ltd | Manufacture of partial composite metal-based composite material, and its manufacturing device |
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| CN107737908A (en) * | 2017-09-01 | 2018-02-27 | 东风精密铸造安徽有限公司 | A kind of vacuum casting high temperature alloy device |
| CN209477267U (en) * | 2019-01-02 | 2019-10-11 | 江苏大学 | Complex precise casting fine grain casting device |
-
2019
- 2019-01-02 CN CN201910000759.2A patent/CN109482844A/en active Pending
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000343202A (en) * | 1999-05-28 | 2000-12-12 | Chuo Spring Co Ltd | Manufacture of partial composite metal-based composite material, and its manufacturing device |
| CN1688401A (en) * | 2002-08-20 | 2005-10-26 | Abb公司 | Cooling electromagnetic stirrers |
| US20110297239A1 (en) * | 2007-08-03 | 2011-12-08 | Technische Universität Dresden | Method and device for the electromagnetic stirring of electrically conductive fluids |
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