CN202270958U - Device for ultrasonically controlling directionally-solidified liquid-solid interface - Google Patents
Device for ultrasonically controlling directionally-solidified liquid-solid interface Download PDFInfo
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- CN202270958U CN202270958U CN2011203836182U CN201120383618U CN202270958U CN 202270958 U CN202270958 U CN 202270958U CN 2011203836182 U CN2011203836182 U CN 2011203836182U CN 201120383618 U CN201120383618 U CN 201120383618U CN 202270958 U CN202270958 U CN 202270958U
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- directional solidification
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Abstract
The utility model relates to a device for ultrasonically controlling a directionally-solidified liquid-solid interface. A group of ultrasonic emitting probes which rotate at a certain speed and mutually form a certain angle are installed near the peripheral liquid-solid interface of a crystallizer. Emitted ultrasonic waves spread in liquid phase to form acoustic streaming with mixing effect. Intensity of the ultrasonic acoustic streaming is controlled so that radial-direction temperature and solute of the liquid-solid interface can be evenly distributed again, the fact that solidified materials grow in the form of a planar interface is ensured, defects of mixed crystal, freckles and the like are avoided, and mechanical properties and production efficiency of directionally solidified castings are improved.
Description
Technical field
The utility model relates to the unidirectional solidification material preparation field, specifically is a kind of device of ultrasonic wave control directional solidification liquid-solid boundary.
Background technology
Directional solidification is meant application technology means in process of setting, sets up the thermograde of specific direction at the liquid-solid boundary place, thereby melt is solidified along the direction opposite with hot-fluid, finally obtains directed tissue even monocrystalline.Directional solidification technique has been eliminated the horizontal crystal boundary that in crystallization process, generates, and has improved the mechanical behavior under high temperature of alloy.But, being prone to defectives such as segregation, stray crystal and freckle in the directional solidification process of monocrystalline, these defectives greatly reduce the mechanical property and the product percent of pass of foundry goods, increase energy resource consumption and manufacturing cost.
Performances such as its mechanics of solidified structure decision of foundry goods, the liquid-solid boundary form in solidified structure and defective and the process of setting is closely related.Epirelief or recessed liquid-solid boundary can make freckle form the probability increase, strengthen the dried degree that departs from the foundry goods geometric center of dendrite.When alloy solidified with the planar interface mode, the melt heat was derived from the direction perpendicular to the solid-liquid planar interface, can reduce or eliminate above-mentioned defective.
The utility model utilizes ultrasonic wave near liquid-solid boundary, to handle alloy melt; Make in the small scale scope of solid liquid interface the place ahead radially solute and uniformity of temperature profile; Reduce or eliminate radial temperature and concentration gradient; Thereby obtain straight liquid-solid boundary, reach defectives such as eliminating freckle, segregation, improve the purpose of mechanical castings.
The utility model content
The purpose of the utility model provides a kind of device of ultrasonic wave control directional solidification solid liquid interface, in the directional solidification process, controls liquid-solid boundary, avoids process of setting defectives such as stray crystal, freckle to occur.
The technical conceive of the utility model is: near, the liquid-solid boundary peripheral at crystallizer one group of ultrasonic emitting probe is installed, probe can rotate and is mutually certain angle around crucible.Ultrasonic wave imports alloy melt into certain power and frequency, ultrasonic in alloy melt the decay of finite amplitude make the certain acoustic pressure gradient of formation in the melt, thereby form the jet flow of a fluid, i.e. acoustic streaming.When the speed of acoustic streaming met or exceeded thermal convection current and solute convection speed, solute and temperature redistributed in the liquid phase zone, under a certain size frequency and power, can make forward position, freezing interface temperature and CONCENTRATION DISTRIBUTION even, thereby realized plane interface growth.
Do not influence longitudinal temperature gradient and do not producing under the condition of ultrasonic cavitation for reaching, eliminating radial temperature difference and concentration difference, taking following method:
(1) through at one group of ultrasonic emitting probe of the peripheral installation of crucible, ultrasonic wave is imported alloy melt and produces ultrasonic acoustic streaming, realize the purpose of ultrasonic agitation.
(2) through regulating ultrasonic power and frequency size, realize control to ultrasonic wave acoustic streaming stirring intensity.
(3) through regulating ultrasonic power and frequency size, the sound pressure amplitude of control ultrasonic wave in melt realizes not taking place the control of ultrasonic cavitation.
(4) the peripheral ultrasonic emitting probe of rotation crucible, the control ultrasonic wave evenly stirs liquid phase, makes temperature field, liquid-solid boundary forward position and concentration field more even.
(5) frequency of adjusting ultrasonic emitting probe makes each probe under different frequency, stir liquid phase, reaches to make the uniform more purpose of temperature field, forward position, interface coupling.
According to above design, the utility model adopts following technical proposals:
A kind of device that uses ultrasonic wave control directional solidification liquid-solid boundary; Comprise a tubular resistance heating body, the periphery is wrapped in a heat-insulation layer, it is characterized in that having an insulating layer structure body to be positioned at below the said heat-insulation layer; After the corundum crucible cunning wore the centre bore of said insulating layer structure body; Stretch in the cooling cylinder body that fills liquid Ga-In cooling agent, the corundum crucible bottom links to each other with a pull system and places among the cooling cylinder body, and a water-cooling system is enclosed within said cooling cylinder body outside; There are a plurality of ultrasonic emitting probes circumferentially evenly to be installed among the said insulating layer structure body, link to each other with source of ultrasound signal, and the interface between interior liquid phase sample of alignment probe corundum crucible and the solid phase sample.
The utility model has following significant substantive distinguishing features and advantage compared with prior art:
The utility model is that one group of ultrasonic emitting probe that rotates, is mutually certain angle with certain speed is installed near the peripheral liquid-solid boundary of crystallizer.Ultrasonic waves transmitted is propagated in liquid phase and is formed the acoustic streaming with stirring action; Control the intensity of ultrasonic acoustic streaming; Make the redistribution of liquid-solid boundary radial temperature and solute evenly; Guarantee that solidification material grows with the planar interface mode, avoid generation of defects such as stray crystal, freckle, improve directional solidification castings mechanical property and production efficiency.
Description of drawings
Fig. 1 is the device for directionally solidifying structural representation of the utility model control liquid-solid boundary.
Fig. 2 is Fig. 1 core structural representation.
Fig. 3 is a ultrasonic probe mounting means sketch map.
The specific embodiment
The utility model preferred implementation is following:
Embodiment one:
Referring to Fig. 1 and Fig. 2; The device of the utility model control liquid-solid boundary directional solidification; Comprise a tubular resistance heating body (1), the periphery is wrapped in a heat-insulation layer (2), it is characterized in that having an insulating layer structure body (5) to be positioned at below the said heat-insulation layer (2); After corundum crucible (7) is slided and was worn the centre bore of said insulating layer structure body (5); Stretch in the cooling cylinder body (10) that fills liquid Ga-In cooling agent (6), corundum crucible (7) bottom links to each other with a pull system (12) and places among the cooling cylinder body (10), and a water-cooling system (9) is enclosed within said cooling cylinder body (10) outside; There are a plurality of ultrasonic emitting probes (8) circumferentially evenly to be installed among the said insulating layer structure body (5), link to each other with source of ultrasound signal (11), and the interface between interior liquid phase sample of alignment probe corundum crucible (7) (3) and the solid phase sample (4).
Embodiment two:
Present embodiment two is basic identical with embodiment one, and special feature is that said a plurality of ultrasonic emitting probes (8) are installed and are mutually set angle.Source of ultrasound signal (11) adopts the source of ultrasound signal of adjustable ultrasonic emitting frequency and power, and each ultrasonic probe is worked under different frequency and power.Ultrasonic emitting probe (8) is rotatably assorted with said insulating layer structure body (5), make its can be around the crucible periphery at the uniform velocity or the speed change rotation.
Embodiment three:
Referring to Fig. 1, Fig. 2 and Fig. 3; The device of this ultrasonic wave control directional solidification liquid-solid boundary comprises resistance heating body (1), heat-insulation layer (2), liquid phase sample (3), solid phase sample (4), thermal insulation layer (5), liquid Ga-In cooling agent (6), corundum crucible (7), ultrasonic emitting probe (8), water-cooling system (9), cooling cylinder body (10), source of ultrasound signal (11) and pull system (12).Sample is an aluminium alloy, its length 150 mm, diameter 12 mm.
Resistance heating body (1) highly is 200 mm, crucible external diameter 14 mm, and corundum crucible (7) is spaced apart 2 mm with resistance heating body (1), and ultrasonic emitting probe (8) is positioned among the thermal insulation layer (5), with corundum crucible (7) interval 1.5 mm.
The ultrasonic emitting probe is made up of three probes that are mutually 120 °; Evenly stir melt for reaching ultrasonic wave; Reach the purpose that more effectively reduces radial temperature difference and concentration difference, three probes impose the different working frequency, are rotated the stirring melt with certain speed around crystallizer simultaneously.For acoustic streaming intensity that ultrasonic wave is produced in melt enough big; To overcome the convection current in the aluminium alloy melt; Prevent again simultaneously that cavitation phenomenon from taking place; Select appropriate ultrasonic power output and operating frequency, make ultrasonic wave through the sound pressure amplitude that in aluminium liquid, produces behind thermal insulation layer and the corundum crucible less than 1 MPa, produce 10 simultaneously
-4~ 10
-2The acoustic streaming of m/s.
During assembling, thermal insulation layer (5) is positioned under the heat-insulation layer (2), and corundum crucible (7) passes the hole in the thermal insulation layer (5), links to each other with pull system (12); Corundum crucible (7) passes the cooling cylinder body of being made up of liquid Ga-In cooling agent (6) (10), and corundum crucible (7) bottom links to each other with pull system (12) and places among the cooling cylinder body (10), and water-cooling system (9) is enclosed within cooling cylinder body (10) outside.Ultrasonic emitting probe (8) is positioned among the thermal insulation layer (5), links to each other with source of ultrasound signal (11).The decay of ultrasonic wave finite amplitude in liquid phase produces acoustic streaming in melt; Make the solidification liquid liquid/solid interface front end temperature and the concentration of acoustic streaming redistribute owing to forcing to flow, and regulate ultrasonic power and frequency, make the redistribution of radial temperature and concentration evenly; Form straight liquid-solid boundary; Reduce or eliminate defectives such as segregation, make sample under higher pulling rate, also can realize the growth of planar interface, improve mechanical castings and production efficiency.
Claims (4)
1. the device of ultrasonic wave control directional solidification liquid-solid boundary; Comprise a tubular resistance heating body (1); The periphery is wrapped in a heat-insulation layer (2); It is characterized in that having an insulating layer structure body (5) to be positioned at below the said heat-insulation layer (2), corundum crucible (7) stretches in the cooling cylinder body (10) that fills liquid Ga-In cooling agent (6) after sliding and wearing the centre bore of said insulating layer structure body (5); Corundum crucible (7) bottom links to each other with a pull system (12) and places among the cooling cylinder body (10), and a water-cooling system (9) is enclosed within said cooling cylinder body (10) outside; There are a plurality of ultrasonic emitting probes (8) circumferentially evenly to be installed among the said insulating layer structure body (5), link to each other with source of ultrasound signal (11), and the interface between interior liquid phase sample of alignment probe corundum crucible (7) (3) and the solid phase sample (4).
2. according to the device of the said ultrasonic wave control of claim 1 directional solidification liquid-solid boundary, it is characterized in that: said a plurality of ultrasonic emitting probes (8) are installed and are mutually set angle.
3. according to the device of claim 1 or 2 said ultrasonic waves control directional solidification liquid-solid boundaries; It is characterized in that: said source of ultrasound signal (11) adopts the source of ultrasound signal of adjustable ultrasonic emitting frequency and power, and each ultrasonic probe is worked under different frequency and power.
4. according to the device of claim 1 or 2 said ultrasonic waves control directional solidification liquid-solid boundaries, it is characterized in that: said ultrasonic emitting probe (8) is rotatably assorted with said insulating layer structure body (5), make its can be around the crucible periphery at the uniform velocity or the speed change rotation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203836182U CN202270958U (en) | 2011-10-11 | 2011-10-11 | Device for ultrasonically controlling directionally-solidified liquid-solid interface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203836182U CN202270958U (en) | 2011-10-11 | 2011-10-11 | Device for ultrasonically controlling directionally-solidified liquid-solid interface |
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| Publication Number | Publication Date |
|---|---|
| CN202270958U true CN202270958U (en) | 2012-06-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203836182U Expired - Fee Related CN202270958U (en) | 2011-10-11 | 2011-10-11 | Device for ultrasonically controlling directionally-solidified liquid-solid interface |
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| CN (1) | CN202270958U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105483817A (en) * | 2015-12-09 | 2016-04-13 | 上海超硅半导体有限公司 | Monocrystalline silicon growth ultrasonic wave oxygen control method |
| CN108326262A (en) * | 2018-02-12 | 2018-07-27 | 哈尔滨工业大学 | A kind of superpower travelling-magnetic-field continuous processing apparatus for directional solidification of alloy-steel casting |
| CN111230077A (en) * | 2020-03-09 | 2020-06-05 | 西北工业大学 | Wide speed-regulating directional solidification device for high-temperature alloy |
| CN113909458A (en) * | 2021-09-16 | 2022-01-11 | 江苏星火特钢有限公司 | Method for refining directional solidification structure of high-temperature alloy casting through ultrasonic disturbance |
-
2011
- 2011-10-11 CN CN2011203836182U patent/CN202270958U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105483817A (en) * | 2015-12-09 | 2016-04-13 | 上海超硅半导体有限公司 | Monocrystalline silicon growth ultrasonic wave oxygen control method |
| CN105483817B (en) * | 2015-12-09 | 2019-04-02 | 上海超硅半导体有限公司 | Monocrystalline silicon growing ultrasonic wave control oxygen technology |
| CN108326262A (en) * | 2018-02-12 | 2018-07-27 | 哈尔滨工业大学 | A kind of superpower travelling-magnetic-field continuous processing apparatus for directional solidification of alloy-steel casting |
| CN108326262B (en) * | 2018-02-12 | 2019-12-31 | 哈尔滨工业大学 | Alloy casting superstrong traveling wave magnetic field continuous treatment directional solidification equipment |
| CN111230077A (en) * | 2020-03-09 | 2020-06-05 | 西北工业大学 | Wide speed-regulating directional solidification device for high-temperature alloy |
| CN113909458A (en) * | 2021-09-16 | 2022-01-11 | 江苏星火特钢有限公司 | Method for refining directional solidification structure of high-temperature alloy casting through ultrasonic disturbance |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120613 Termination date: 20121011 |