CN101571498B - Micropore evolution real-time imaging device during alloy remelting and solidification - Google Patents
Micropore evolution real-time imaging device during alloy remelting and solidification Download PDFInfo
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- CN101571498B CN101571498B CN2009100330284A CN200910033028A CN101571498B CN 101571498 B CN101571498 B CN 101571498B CN 2009100330284 A CN2009100330284 A CN 2009100330284A CN 200910033028 A CN200910033028 A CN 200910033028A CN 101571498 B CN101571498 B CN 101571498B
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Abstract
The invention relates to a micropore evolution real-time imaging device during alloy remelting and solidification, which comprises a lifting device, a heating furnace, a micro-focus X ray tube, a controller, and an image and data analysis computer for receiving and processing an X ray emitted by the a micro-focus X ray tube and penetrating through an alloy sample, wherein a lifting platform of thelifting device is provided with a sample boat which is positioned in the hearth of the heating furnace and consists of a U-shaped frame, a front skin and a back skin; the front skin and the back skin are adhered to the front side and the back side of the U-shaped frame respectively; the U-shaped frame, the front skin and the back skin enclose together to form a sample cavity; and the opening of t he U-shaped frame faces upward. The micropore evolution real-time imaging device is provided with the sample boat which has low cost and is easy to demount and mount, achieves the perfect cooling effect and is suitable for the alloy remelting and solidification; besides, the micropore evolution real-time imaging device is designed with a synchronous moving device to achieve tracking and observation, and is convenient for observing the evolution of micropores during the alloy remelting and solidification.
Description
Technical field
The present invention relates to the technical field of alloy graining, the micropore evolution real time imagery device in relating in particular to a kind of alloy remelting and solidifying.
Background technology
The hole that produces in the process of setting is a most important factor that reduces the aluminium alloy castings performance.The size of these holes has tens mostly to the hundreds of micron, have in addition reach millimeter level, the mechanical property of grievous injury foundry goods is fatigue behaviour especially.Thereby the formation mechanism and the control thereof of research micropore are very important.
Foreign scholar Fuoco, Philip etc. for the formation of studying micropore in the aluminium alloy with grow up, used liquid to quench forming process that method follows the tracks of micropore, but this method is directly perceived inadequately, operability is bad, is difficult to accurately study the formation mechanism of micropore.The formation that Henkel etc. measure new hole with acoustic emission, finding in the Al-11.6%Si alloy has a large amount of new holes to form at eutectic freezing mid-term, and this and the heterogeneous forming core of generally acknowledging contradict, and the confidence level of its method is not high.Q Han uses the high-speed camera Real Time Observation to study the formation and the variation behavior of bubble in the transparent organic material cyclohexylamine, but is not suitable for observing the formation behavior of micropore in the alloy.
Because the real-time technology has strong penetrability, is commonly used to survey the defective of part or weld seam in the commercial production, in scientific research, also be used for observing the cavity filling process and the defective formation of alloy, verify the Computer simulation results of liquid cavity filling process.Campbell uses X ray to observe the variation of bifilm under the decompression curing condition; P D Lee etc. have used the microfocus X-ray Real Time Observation formation and the growth process of micropore in the alloys such as directional solidification aluminum bronze, process of the test is comparatively complicated, the range of observation of thermograde equipment is very little, sample ship adopts boron nitride sintered, cost is too high, and the variation when being difficult to observe the alloy remelting process.
For micropore in the more deep research alloy graining process forms and mechanism, we have designed a kind of novel alloy process of setting micropore and have formed Real Time Image System, are made up of little focus X-ray-ray imaging system, X-ray tube and the synchronous mobile platform of image multiplier, thermograde device, sample ship system.
Summary of the invention
Micropore evolution real time imagery device in the invention provides a kind of alloy remelting that helps observing and solidifying.
The present invention adopts following technical scheme:
A kind of alloy remelting with solidify in micropore evolution real time imagery device, comprise: jacking gear, heating furnace, microfocus X-ray pipe and controller and the image and the data analysis computing machine that are used to receive and handle the emission of microfocus X-ray pipe and pass the X ray of alloy sample, on the lifting table of jacking gear, be provided with sample ship, sample ship is positioned at the burner hearth of heating furnace, described sample ship is by U-shaped frame and preceding covering, back covering is formed, preceding covering, back covering is fitted in the both sides, front and back of U-shaped frame respectively, and by U-shaped frame and preceding covering, back covering surrounds and forms the sample cavity, and the opening of described U-shaped frame upwards.
Compared with prior art, the present invention has following advantage:
1 with the comparing of Britain, and thermograde apparatus structure form is simple, and high-temperature region and low-temperature space combination can realize big thermograde, and up to 15 ℃/mm, observation window runs through stove up and down, and the sample observation scope is big, can observe liquid phase region respectively, two-phase region, solid phase area.
2X ray tube and image multiplier realized about, same moved further on the fore-and-aft direction, can seek and follow the tracks of solid-liquid interface or liquid phase region in the alloy graining process, so as with variations of observing in these zones.
3 sample ship and the crystallizers of having developed a kind of low-cost and easy-to dismounting, easily having installed reach desirable cooling effect; Laying and taking out of alloy sample is easy, easy to operate.
4 compare with the sample ship that uses sinter molding such as boron nitride ceramics, owing to adopt the mechanical clamped structure of refractory metal material, guaranteeing under the prerequisite that aluminium liquid can not be revealed therein, this sample ship can not cause sample ship to damage because of the alloy sample effect of expanding with heat and contract with cold in heating or cooling procedure, the change procedure of micropore in the time of not only can observing alloy graining, the change procedure of micropore in the time of also can observing alloy remelting easily.
The manufacturing cost and the use cost of 5 total systems are low.
Description of drawings
Fig. 1 is the synoptic diagram of system of the present invention, wherein, the 1-frame, the 2-gear unit, stove 13-microfocus X-ray pipe and controller 14-go up stove 15-image and data analysis system 16-wheel under the 3-screw mandrel 4-guide rail 5-lifting table 6-engagement plate 7-rising pipe 8-tank 9-grate 10-water nozzle 11-sample ship 12-.
Fig. 2 is the thermograde heating furnace in the system of the present invention, and Fig. 2 a is a front view, and Fig. 2 b is a left view, and wherein, stove 14-goes up the right watch window of stove 17-globar 18-burner hearth 19-bell 20-thermopair 21-left side watch window 22-under the 12-.
Fig. 3 is a ray synchronous shifter structural representation, wherein, the right slide block 37-of the 23-main motor 24-left slider 25-pedestal 26-guide rail 27-left side platform 28-left side motor 29-U shape frame 30-guide rail 31-master right motor 33-of the leading screw 32-right platform 34-right leading screw 36-of guide rail 35-left side leading screw.
Fig. 4 is the sample ship structural representation, Fig. 4 a is the front view of sample ship, Fig. 4 b is the left view of sample ship, Fig. 4 c is the enlarged drawing of Fig. 4 b A-A partial sectional view, wherein, covering 44-pin 45-sample cavity behind the covering 43-before the circular frame 41-U shape frame 42-behind the circular frame 39-screw 40-before the 38-.
The part photo that Fig. 5 chooses when being the nearly cocrystallized Al-Si alloy remelting of real-time monitored.Fig. 5 a is this zone photo when also not melting, and hickie promptly is the hole among the figure; Fig. 5 b is the photo of this remelting bottom, regional top when molten; Fig. 5 c is all photos of remelting of this zone.
Fig. 6 is the part photo that the nearly cocrystallized Al-Si alloy of real-time monitored is chosen when solidifying.Fig. 6 a is the radiograph before solidifying; Fig. 6 b is the photo when solidifying beginning (solidifying direction upwards), and the hole that begins to separate out is very little, in arrow indication position; Fig. 6 c is the photo that new hole is separated out in a large number and grown up; Fig. 6 d is the photo that solidifies when finishing.
Embodiment
A kind of alloy remelting with solidify in micropore evolution real time imagery device, comprise: jacking gear, heating furnace, microfocus X-ray pipe and controller 13 and the image and the data analysis system 15 that are used to receive and handle the emission of microfocus X-ray pipe and pass the X ray of alloy sample, on the lifting table 5 of jacking gear, be provided with sample ship 11, sample ship 11 is positioned at the burner hearth of heating furnace, described sample ship 11 is by U-shaped frame 40 and preceding covering 41, back covering 42 is formed, preceding covering 41, back covering 42 is fitted in the both sides, front and back of U-shaped frame 40 respectively, and by U-shaped frame 40 and preceding covering 41, back covering 42 surrounds and forms sample cavity 44, fastening with screw 38, the opening of described U-shaped frame 40 upwards, alloy sample places the sample cavity of sample ship, because slit, fastening back is very little, the alloy melt after the fusing is not revealed by self surface tension effects.
In the present embodiment, with reference to Fig. 4, the U-shaped frame of sample ship, covering, circular frame adopts refractory metal material to make, as stainless steel, this structure and material select to make alloy sample lay and take out all very convenient, in the alloy sample heating reflow process of packing into, also can not damage inefficacy, and not influence the observation in follow-up process of setting owing to the effect of expanding with heat and contract with cold causes sample ship.Sample ship is reusable, greatly reduces use cost.
With reference to Fig. 4, on sample ship 11, be provided with cooling device, described cooling device is made up of water nozzle 10 and tank 8, and water nozzle 10 is towards sample ship 11, and tank 8 is located at the lower end of sample ship 11 and is positioned at the below of water nozzle 10, is provided with rising pipe 7 on tank 8.Sample ship 11 lower ends are fixing with tank 8 with pin 44, make sample ship in vertical direction.The water yield of water nozzle 10 ejections can be regulated by flowmeter, and water nozzle 10 flows into tank 8 towards the water of sample ship 11 ejections along sample ship, and flows away by rising pipe 7, can obtain different cooling velocities like this when alloy graining.
With reference to Fig. 2, heating furnace is made up of grate 9, time stove 12 and last stove 14, following stove 12 is located on the grate 9, last stove 14 is located at down on the stove 12, following stove 12 reaches upward, and stove 14 comprises body of heater, forward and backward both sides at body of heater are respectively equipped with globar, are respectively equipped with left watch window 21, the right watch window 22 that is used for the Transmission X ray in the and arranged on left and right sides of body of heater.Burner hearth 18 UNICOMs of stove, and size up and down equate.Accurately control and the measurement fire box temperature with the temperature controller that links to each other with thermopair 20 by thermopair 20, scope is 50-1500 ℃.It is the high-temperature region that stove is gone up in general setting, and generally more than 650 degree, following stove is a low-temperature space to temperature, temperature is generally below 500 degree, promptly formed the furnace temperature zone of transition that has the adjustable temperature gradient like this between last stove 14 and following stove 12, the two-phase region of alloy also is the ray area of observation coverage promptly herein herein.By setting the temperature of high-temperature region and low-temperature space, can realize the thermograde of 30 ℃/mm in theory at the area of observation coverage, in fact can to reach thermograde be 0-15 ℃/mm to this device.For reducing the decay of X ray, open two each and every one long and narrow left and right sides windows in the area of observation coverage left and right sides and run through body of heater, window area covers the heat insulation mica sheet of last layer, blocking-up burner hearth and the exchange of extraneous hot-fluid, add graphite samming lining in the last stove burner hearth, the window's position and the mutually noninterfere of globar position have enlarged range of observation, are convenient to the evolution of real-time monitored alloy graining process solid phase area, liquid phase region or two phase region micropore.With the thermograde device difference of the Lee of university of Britain kingdom, this installs, and not only version is simple, also can realize big thermograde, and observation scope is big, and cost is very low.
With reference to Fig. 3, the image of described microfocus X-ray pipe and controller 13 and X ray and data analysis system 15 are arranged on ray with on the moved further, described ray comprises pedestal 25 with moved further, can on pedestal 25, move up and down slidely connecting U-shaped frame 29 and U-shaped frame 29 on the pedestal 25, on U-shaped frame 29, be connected with main leading screw 31, main leading screw 31 is connected in the output shaft of main motor 23, left side at U-shaped frame 29, the left platform 27 of difference on the right upright arm, right platform 33 and left platform 27, right platform 33 can be on the left side of U-shaped frame 29, right upright arm moves forward and backward, be provided with being slidingly connected for left and right directions between left slider 24 and left slider 24 and the left platform 27 on the left platform 27, left leading screw 37 has been threaded on left slider 24, left side leading screw is connected in the output shaft of left motor 28, and described microfocus X-ray pipe and controller 13 are located on the left platform 27; Be provided with being slidingly connected for left and right directions between right slide block 36 and right slide block 36 and the right platform 33 on the right platform 33, right leading screw 35 has been threaded on right slide block 36, right leading screw is connected in the output shaft of right motor 32, and the image of described X ray and data analysis system 15 are located on the right platform 33.The ray synchronous shifter be realize X-ray ray tube and image and analytic system about, the same moved further of fore-and-aft direction, be convenient to follow the tracks of and determine the observation position that needs, the enlargement factor of change observation area.
Hereinafter with reference to Fig. 1, describe be used for can the real-time monitored alloy remelting with process of setting in the current most preferred embodiment of system of the present invention of micropore differentiation behavior
(3mm * 10mm * 650mm), insert sample ship 11, fixedlys connected with lifting table 5 by engagement plate 6 by sample ship 11 for cocrystallized Al-Si alloy sample is nearly made the sample ship required size for one of them embodiment.Starting induction motor makes sample ship 11 to move up and down by different speed to desired location, open stove 14 and following stove 12 by the temperature switch board and begin to be warming up to (Δ G=2.2 ℃/mm) heating sample ship of temperature required gradient, the feasible sample that is positioned at the sample ship in stove window 24 zones melts from top to bottom, send ray by microfocus X-ray controller control microfocus X-ray pipe 13 by setting voltage (75KV) and power (25W) in the temperature-rise period, penetrate sample ship 11 by left and right sides window, use image and data analysis system 15 to catch and analyze the differentiation behavior of micropore defective in the alloy melting process; Temperature begins by water nozzle 10 to sample ship 11 water spray coolings after arriving design temperature, make melt in the sample ship 11 by the direction opposite directional solidification that makes progress with gravity, use X-ray tube synchronous shifter (accompanying drawing 3) to seek and definite two-phase region zone, in process of setting, use the microfocus X-ray imaging system to catch the formation behavior of micropore.
The part photo that Fig. 5 chooses when being the nearly cocrystallized Al-Si alloy remelting of real-time monitored.Fig. 5 a is this zone photo when also not melting, and leukasmus promptly is the hole among the figure; Fig. 5 b is the photo of this remelting bottom, regional top when molten, and the Kong Junyi of melting range, top disappears, and analyzes to find it is that come-up disappears by video recording, rather than dissolving, and molten hole, bottom still remains unchanged; Fig. 5 c is all photos of remelting of this zone, and the original hole of alloy sample substantially all disappears.
Fig. 6 is the part photo that the nearly cocrystallized Al-Si alloy of real-time monitored is chosen when solidifying.Fig. 6 a is the radiograph before solidifying, and does not have the hole among the figure; Fig. 6 b is the photo when solidifying beginning (solidifying direction upwards), has separated out a small amount of spilehole in some position among the figure; Fig. 6 c is the photo that new hole is separated out in a large number and grown up; Fig. 6 d is the photo that solidifies when finishing, and the hole among the figure is pore, and the hole that the hole dimension of separating out is earlier separated out after is big.
Claims (3)
- An alloy remelting with solidify in micropore evolution real time imagery device, comprise: jacking gear, heating furnace, microfocus X-ray pipe and controller (13) and the image and the data analysis system (15) that are used to receive and handle the emission of microfocus X-ray pipe and pass the X ray of alloy sample, on the lifting table (5) of jacking gear, be provided with sample ship (11), sample ship (11) is positioned at the burner hearth of heating furnace, it is characterized in that:Covering (41), back covering (42) were formed before described sample ship (11) was reached by U-shaped frame (40), preceding covering (41), back covering (42) are fitted in the both sides, front and back of U-shaped frame (40) respectively, and by U-shaped frame (40) and before covering (41), back covering (42) surround and form sample cavity (44), fastening with screw (38), the opening of described U-shaped frame (40) upwardsDescribed heating furnace is made up of grate (9), time stove (12) and last stove (14), following stove (12) is located on the grate (9), last stove (14) is located at down on the stove (12), following stove (12) reaches upward, and stove (14) comprises body of heater, forward and backward both sides at body of heater are respectively equipped with globar, are respectively equipped with the left watch window (21) that is used for the Transmission X ray, right watch window (22) in the and arranged on left and right sides of body of heater.
- 2. alloy remelting according to claim 1 with solidify in micropore evolution real time imagery device, it is characterized in that:Be provided with cooling device at sample ship (11), described cooling device is made up of water nozzle (10) and tank (8), water nozzle (10) is towards sample ship (11), and tank (8) is located at the lower end of sample ship (11) and is positioned at the below of water nozzle (10), is provided with rising pipe (7) on tank (8).
- 3. alloy remelting according to claim 1 with solidify in micropore evolution real time imagery device, it is characterized in that:The image of described microfocus X-ray pipe and controller (13) and X ray and data analysis system (15) are arranged on the ray synchronous shifter, described ray synchronous shifter comprises pedestal (25), can on pedestal (25), move up and down slidely connecting U-shaped frame (29) and U-shaped frame (29) on the pedestal (25), on U-shaped frame (29), be connected with main leading screw (31), main leading screw (31) is connected in the output shaft of main motor (23), left side in U-shaped frame (29), be respectively equipped with left platform (27) on the right upright arm, right platform (33) and left platform (27), right platform (33) can be on the left side of U-shaped frame (29), right upright arm moves forward and backward, be provided with being slidingly connected for left and right directions between left slider (24) and left slider (24) and the left platform (27) on the left platform (27), left leading screw (37) has been threaded on left slider (24), left side leading screw is connected in the output shaft of left motor (28), and described microfocus X-ray pipe and controller (13) are located on the left platform (27); Be provided with being slidingly connected for left and right directions between right slide block (36) and right slide block (36) and the right platform (33) on the right platform (33), right leading screw (35) has been threaded on right slide block (36), right leading screw is connected in the output shaft of right motor (32), and the image of described X ray and data analysis system (15) are located on the right platform (33).
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| CN105004638A (en) * | 2014-04-24 | 2015-10-28 | 西北工业大学 | Speed-accurately controlled transparent solution phase-separation observation apparatus |
| CN104315849B (en) * | 2014-11-10 | 2016-06-22 | 湖南省地质测试研究院 | A kind of use for laboratory roasting reduction furnace |
| CN111473650A (en) * | 2020-04-15 | 2020-07-31 | 上海大学 | Multifunctional heating furnace and application thereof |
| CN114289690A (en) * | 2021-12-24 | 2022-04-08 | 北京理工大学 | Device for in-situ observation of metal directional solidification of industrial X-CT equipment and use method |
| CN117920534B (en) * | 2024-03-25 | 2024-06-18 | 武汉驿路通科技股份有限公司 | Automatic dispensing equipment for FBG (fiber Bragg Grating) |
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|---|---|---|---|---|
| GB1401702A (en) * | 1972-05-31 | 1975-07-30 | Commissariat Energie Atomique | Method and apparatus for checking the position of a bore in a block |
| EP0573199A3 (en) * | 1992-06-01 | 1994-02-23 | Xerox Corp | |
| JP2004250728A (en) * | 2003-02-18 | 2004-09-09 | Toshiba Corp | Method and system for producing metal-coated wire rod |
| CN201464385U (en) * | 2009-06-05 | 2010-05-12 | 东南大学 | Real-time imaging device for millipore evolution in alloy remelting and solidifying |
-
2009
- 2009-06-05 CN CN2009100330284A patent/CN101571498B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1401702A (en) * | 1972-05-31 | 1975-07-30 | Commissariat Energie Atomique | Method and apparatus for checking the position of a bore in a block |
| EP0573199A3 (en) * | 1992-06-01 | 1994-02-23 | Xerox Corp | |
| JP2004250728A (en) * | 2003-02-18 | 2004-09-09 | Toshiba Corp | Method and system for producing metal-coated wire rod |
| CN201464385U (en) * | 2009-06-05 | 2010-05-12 | 东南大学 | Real-time imaging device for millipore evolution in alloy remelting and solidifying |
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