CN108766193A - A kind of low melting point transparent alloy Under Pressure Solidification home position observation device - Google Patents
A kind of low melting point transparent alloy Under Pressure Solidification home position observation device Download PDFInfo
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Abstract
A kind of low melting point transparent alloy Under Pressure Solidification home position observation device, including mold, mold includes upper mold and lower mold, upper mold forms closed cavity when coordinating with lower mold, lower mold includes lower upper mold portion and lower mold lower half portion, and cavity side is provided with temperature sensor and pressure sensor, pressure-resistant O-ring seal is embedded in upper mold, the end of cavity is provided with laminar growth room, and lower mold bottom is provided with independent window；It is provided with the control pressurer system for controlling melt pressure in cavity at the top of upper mold, data collecting system is provided in temperature sensor and pressure sensor；Lower mold upper and lower ends are both provided with temperature control system installation point and Precise Temperature Control System, are correspondingly arranged on light source and high-speed camera positioned at independent window both sides, light source and high-speed camera are on the same line.The present invention has the small-sized simplicity of device, and mold is easy to process, the feature good to the sealing effect of low melting point transparent alloy melt under stress.
Description
Technical field
The present invention relates to metal casting forming technology and technical field of mold, more particularly to a kind of low melting point transparent alloy pressure
Home position observation device is solidified under power.
Background technology
Extrusion casint is a kind of advanced near-net-shape technique, and casting process molten metal Stable Filling can avoid volume gas；
Process of setting plays the role of up to 80-120MPa pressure, generates mandatory extruding feeding, can avoid hole defect and generates.Using
The part of Extrution casting technique production has very high consistency, and can be heat-treated.In addition, in extrusion casint, pressure
Effect makes casting be fitted closely with mold, enhances interface heat transfer, improves cooling velocity, to crystal grain thinning.The technique is suitable for
Produce the high stress members of mechanical property requirements.Currently, extrusion casint has become the life of the industrial circles such as automobile, space flight, aviation
The important means of the high-grade non-ferrous metal part of production, has good development prospect (Ghomashchi M R, Vikhrov
A.Squeeze casting:an overview[J].Journal of Materials Processing Technology,
2000,101(1-3):1-9)。
Process conditions microstructure, microstructure determine mechanical property.Pressure condition in extrusion casint is to microcosmic
Tissue such as dendritic growth speed, crystallite dimension, two secondary arm spacing and solute Distribution have important influence.Due to routine
Experimental method is subject to processing the influence of condition (casting mold closing) and metal nature (not being transparent), cannot directly observe pressure
The evolutionary process of solidification features under power can only obtain the final result of Microstructural Evolution formation.In order to deeper into
The evolutionary process for solving microstructure has scholar to use transparent alloy such as salicylic acid fat, aqueous ammonium chloride solution and fourth two in recent years
Nitrile etc. is studied instead of metal.Wherein succinonitrile is a kind of transparent body-centered cubic material, and solidification behavior is similar to metal, is melted
About 58 DEG C and more sensitive for the variation of pressure of point, this provides the evolutionary process of home position observation dendritic growth very big
It is convenient.Sawada et al. carries out the aqueous ammonium chloride solution being positioned in the growing container in pressure transmission oil by controlling oil pressure
Pressure, the device use the solution reservoir of fluoropolymer-containing plastic flexible pipe, pass through matching between plastic flexible pipe and metallic piston
Conjunction solves the problems, such as that solution seals.However this hydraulic device is complicated, and the plastic flexible pipe in device may be with succinonitrile or third
Ketone reacts, and is not suitable for experiment (Sawada T, Takemura K, the Shigematsu K, et of succinonitrile or acetone
al.Dynamic pressure control for solution growth and its microgravity
application[J].Journal of Crystal Growth,1996,158(3):328-335.).Kar et al. will be connected
The stainless steel growing container of bellows is placed in oil bath, by oil bath control temperature and pressure, to the succinonitrile in growth room into
Row pressure (Kar P, Lacombe J C, Koss M B.Velocity and radius transients during
pressure mediated dendritic growth of succinonitrile[J].Materials Science and
Technology,2004,20(10):1273-1280.And Koss M B, Lacombe J C, Chait A, et
al.Pressure-mediated effects on thermal dendrites[J].Journal of Crystal
Growth,2005,279(1-2):170-185.).This device can only realize thermostatic control, cannot establish the temperature of different location
Gradient is spent, therefore can only realize the isometric solidification of succinonitrile material.The present invention is by making similar to the small of Direct Squeezing Casting
Home position observation succinonitrile or succinonitrile-isometric life of acetone alloy branch crystal may be implemented in the metal die of type device and simple and flexible
Long or oriented growth evolutionary process.In conventional extrusion casting, it can be existed by the precision-fit and molten metal of upper/lower die
Solidification in fit clearance is sealed, however since the succinonitrile after solidification-acetone alloy is wax-like form, it is acted in pressure
Under the precision-fit only leaned between metal die be difficult to realize the sealing of melt.Therefore it needs to combine transparent alloy Under Pressure Solidification
The material property of the characteristics of device and transparent alloy, using simple special seal approach, carry out eutectic can be stablized by making
The reliable mold and device of point transparent alloy Under Pressure Solidification home position observation.
Invention content
In order to overcome the above-mentioned deficiencies of the prior art, the purpose of the present invention is to provide a kind of low melting point transparent alloy pressure
Lower solidification home position observation device solves the problems, such as that transparent alloy is difficult to seal under stress, has the small-sized simplicity of device,
Mold is easy to process, and the feature good to the sealing effect of low melting point transparent alloy melt under stress is, it can be achieved that eutectic
The target of directional solidification process home position observation under point transparent alloy pressure.
To achieve the goals above, the technical solution adopted by the present invention is：
A kind of low melting point transparent alloy Under Pressure Solidification home position observation device, including mold 1, the mold 1 include
Upper mold 7 and lower mold 9, the upper mold 7 form closed cavity 11, the lower mold 9 packet when coordinating with lower mold 9
Lower upper mold portion 10 and lower mold lower half portion 14 are included, 11 side of cavity is provided with temperature sensor 12 and pressure
Sensor 13, embedded with pressure-resistant O-ring seal 8 in the upper mold 7, the end of the cavity 11 is provided with laminar growth
Room 19,9 bottom of lower mold are provided with independent window 16；7 top of upper mold is provided with for controlling cavity 11
The control pressurer system 2 of middle melt pressure is provided on the temperature sensor 12 and pressure sensor 13 for adopting in real time
Collect the data collecting system 4 of melt pressure and temperature；9 upper and lower ends of lower mold are both provided with temperature control system installation point 20
With Precise Temperature Control System 3, it is correspondingly arranged on light source 5 and high-speed camera 6 positioned at 16 both sides of independent window, light source 5 is taken the photograph with high speed
Shadow instrument 6 is on the same line.
It is provided with fixing piece 15 on the outside of independent window on 16 outside of independent window.
The independent window 16 forms watch window 17, the light source 5, high-speed camera 6 and watch window 17
Center is point-blank.
The laminar growth room 19 is described by being formed between two pieces of sapphire glass 18 and lower mold lower half portion 14
Sapphire glass 18 and lower mold lower half portion 14 between by independent window 16, pressure-resistant O-ring seal 8 and independent window outside
Side fixing piece 15 is sealed.
19 thickness of laminar growth room is 0.5mm, and the temperature of controllable precise is formed in laminar growth room 19
Gradient.
It is the clearance fit of precision between the upper mold 7 and lower mold 9, passes through gap between upper mold and lower mold
Cooperation and one group of embedded pressure-resistant O-ring seal 8 are sealed.
The temperature sensor 12 and pressure sensor 13 is connected through a screw thread and seals with lower upper mold portion 10,
And it is further sealed by pressure-and heat-resistance glue.
Beneficial effects of the present invention：
Suitable low melting point transparent alloy Under Pressure Solidification home position observation device has been made, device and mould structure are simple,
Making easy to process forms the temperature gradient of controllable precise in growth room, has the heat safe sapphire glass window of pressure resistance,
It can realize the target of directional solidification process home position observation under transparent alloy pressure.
In conjunction with the material property of transparent alloy, for the special melt sealant technology of the mold design.Upper mold and lower die
It is sealed using one group of embedded pressure-resistant O-ring seal at the cooperation of tool, passes through separate window between sapphire glass and mold
Fixing piece is sealed on the outside of mouth, the pressure-resistant O-ring seal of embedded independent window and independent window, is solved wax-like, watery etc.
Melt is difficult to the problem sealed in a mold under stress, enhances the leakproofness and stability of mold.
Description of the drawings
Fig. 1 is a kind of low melting point transparent alloy Under Pressure Solidification home position observation schematic device.
Fig. 2 is a kind of low melting point transparent alloy Under Pressure Solidification home position observation mold schematic diagram.
Fig. 3 is the schematic diagram that one group of pressure resistance O-ring seal is embedded in upper mold in upper mold.
Fig. 4 is the partial enlarged view of a-quadrant in Fig. 2.
Fig. 5 is sapphire glass schematic diagram.
Fig. 6 is independent window structure chart.
Fig. 7 is anchor structure figure on the outside of independent window.
Specific implementation mode
Invention is further described in detail below in conjunction with the accompanying drawings.
As shown in Figure 1, a kind of low melting point transparent alloy Under Pressure Solidification home position observation device, is controlled by mold 1, pressure
System 2, temperature control system 3, data collecting system 4, light source 5 and high-speed camera 6 form.
The control pressurer system 2 can accurately control the pressure of melt in mold, and data collecting system 4 can be real-time
Acquire the pressure and temperature of melt.
As shown in Fig. 2, including upper mold 7 and lower mold 9, pressure-resistant O-ring seal 8 is embedded in upper mold 7；Lower mold 9 by
Lower upper mold portion 10, temperature sensor 12, pressure sensor 13, lower mold lower half portion 14, independent window outside are fixed
Part 15, independent window 16, pressure-resistant O-ring seal 8, watch window 17, sapphire glass 18 and temperature control system tie point 20 form.
As shown in Fig. 4 Fig. 5：The upper mold 7 forms closed cavity 11 when coordinating with lower mold 9, for placing
Bright aluminium alloy solid；Laminar growth room 19, transparent alloy melt are formed between two pieces of sapphire glass 18 and mold
It is 0.5mm flakes growth room 19 to enter thickness from the cavity 11 of a diameter of 15mm.
The lower upper mold portion 10 is respectively mounted Precise Temperature Control System 3 with lower mold lower half portion 14, in flake
The temperature gradient of controllable precise is formed in growth room 19.
The light source 5, high-speed camera 6 and watch window 17 center point-blank；In the irradiation of light source 5
Under, it can the growth of transparent alloy or fusion process in home position observation and register sheet growth room 19 by high-speed camera 6.
As shown in Figure 3：Belong to accurate clearance fit between the upper mold 7 and lower mold 9, it is resistance on upper mold 7
O-ring seal 8 is pressed to be embedded in upper mold 7, it is O-shaped by precision-fit and one group of embedded pressure resistance between upper mold 7 and lower mold 9
Sealing ring 8 is sealed.
The temperature sensor 12 and pressure sensor 13 is connected through a screw thread and seals with lower upper mold portion 10,
And it is further sealed by pressure-and heat-resistance glue.
As shown in Fig. 6 Fig. 7：Independent window 16 is arranged by o-ring groove 22 on lower mold 9, the formation of independent window 16
Watch window 17.Pass through independent window 16, embedded separate window between the sapphire glass 18 and lower mold lower half portion 14
Fixing piece 15 is sealed on the outside of the pressure-resistant O-ring seal 8 and independent window of mouth 16, and pressure-resistant O-ring seal 8 is by sapphire glass
18, on the outside of independent window 16 and independent window the extruding of fixing piece 15 and realize the effect of sealing, it is fixed on the outside of independent window
Screw hole 22 is provided on part 15.
The operation principle of the present invention：
By taking succinonitrile -2wt.% acetone alloys as an example, when work, transparent alloy sample is fitted into cavity 11, opens peace
Precise Temperature Control System 3 on mold 1, it is 0.5mm thin slices to enter thickness from the cavity 11 of a diameter of 15mm after alloy melting
Shape growth room 19, mold 9 under upper mold 7 enters under the control of control pressurer system 2, and pressure is applied to the melt in cavity 11
Power.Lower upper mold portion 10 is respectively mounted Precise Temperature Control System 3 with lower mold lower half portion 14, the shape in laminar growth room 19
At the temperature gradient of controllable precise, under the action of control pressurer system 2, melt directional solidification in laminar growth room 19.
The center of light source 5, high-speed camera 6 and watch window 17 point-blank, under the irradiation of light source 5, passes through high-speed photography
Instrument 6 can the growth of transparent alloy or fusion process in home position observation and register sheet growth room 19.
In course of exerting pressure, it is susceptible to leakage at upper mold 7 and lower 10 cooperation of upper mold portion, passes through embedded upper mold
The pressure-resistant O-ring seal 8 and premise clearance fit of tool 7 are sealed；Leakage is easy between sapphire glass 18 and mold 1,
It is sealed by fixing piece 15 on the outside of independent window 16, the pressure-resistant O-ring seal 8 of embedded independent window 16 and independent window,
Pressure-resistant O-ring seal 8 is realized close by the extruding of fixing piece 15 on the outside of sapphire glass 18, independent window 16 and independent window
The effect of envelope；Temperature sensor 12 is easy leakage with pressure sensor 13 and mold junction, is connected through a screw thread resistance to pressure resistance
Hot glue is sealed.This apparatus structure is simple, easy to operate, and can ensure in experimentation the leakproofness of mold and steady
It is qualitative.
Claims (7)
1. a kind of low melting point transparent alloy Under Pressure Solidification home position observation device, which is characterized in that described including mold (1)
Mold (1) include upper mold (7) and lower mold (9), the upper mold (7) forms closed when coordinating with lower mold (9)
Cavity (11), the lower mold (9) include lower upper mold portion (10) and lower mold lower half portion (14), the cavity
(11) side is provided with temperature sensor (12) and pressure sensor (13), and the O-shaped sealing of pressure resistance is embedded in the upper mold (7)
It encloses (8), the end of the cavity (11) is provided with laminar growth room (19), and described lower mold (9) bottom is provided with solely
Vertical window (16)；The control pressurer system for controlling melt pressure in cavity (11) is provided at the top of the upper mold (7)
(2), the pressure and temperature for acquiring melt in real time is provided on the temperature sensor (12) and pressure sensor (13)
Data collecting system (4)；Described lower mold (9) upper and lower ends are both provided with temperature control system installation point (20) and accurate temperature control system
It unites (3), light source (5) and high-speed camera (6), light source (5) and high-speed photography is correspondingly arranged on positioned at independent window (16) both sides
Instrument (6) is on the same line.
2. a kind of low melting point transparent alloy Under Pressure Solidification home position observation device according to claim 1, feature exist
In the independent window (16) outside is provided with fixing piece on the outside of independent window (15).
3. a kind of low melting point transparent alloy Under Pressure Solidification home position observation device according to claim 2, feature exist
In the independent window (16) forms watch window (17), the light source (5), high-speed camera (6) and watch window
(17) center is point-blank.
4. a kind of low melting point transparent alloy Under Pressure Solidification home position observation device according to claim 1, feature exist
In the laminar growth room (19) between two pieces of sapphire glass (18) and lower mold lower half portion (14) by forming, institute
Between the sapphire glass (18) stated and lower mold lower half portion (14) by independent window (16), pressure-resistant O-ring seal (8) and
Fixing piece (15) is sealed on the outside of independent window.
5. a kind of low melting point transparent alloy Under Pressure Solidification home position observation device according to claim 1, feature exist
In described laminar growth room (19) thickness is 0.5mm, forms the temperature ladder of controllable precise in laminar growth room 19
Degree.
6. a kind of low melting point transparent alloy Under Pressure Solidification home position observation device according to claim 1, feature exist
In being accurate clearance fit between the upper mold (7) and lower mold (9), pass through gap between upper mold and lower mold
Cooperation and one group of embedded pressure-resistant O-ring seal 8 are sealed.
7. a kind of low melting point transparent alloy Under Pressure Solidification home position observation device according to claim 1, feature exist
In, the temperature sensor (12) and pressure sensor (13) and lower upper mold portion (10) be connected through a screw thread with it is close
Envelope, and further sealed by pressure-and heat-resistance glue.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810508002.XA CN108766193B (en) | 2018-05-24 | 2018-05-24 | Device for in-situ observation of solidification of low-melting-point transparent alloy under pressure |
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| CN201810508002.XA CN108766193B (en) | 2018-05-24 | 2018-05-24 | Device for in-situ observation of solidification of low-melting-point transparent alloy under pressure |
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| CN108766193B CN108766193B (en) | 2020-11-06 |
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| CN106546717A (en) * | 2016-11-03 | 2017-03-29 | 清华大学 | A kind of visualization high temperature thermoformable engineer testing system |
| CN207043304U (en) * | 2017-06-23 | 2018-02-27 | 深圳市拓利兴科技有限公司 | A kind of new die casting |
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2018
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| JPH09113473A (en) * | 1995-10-19 | 1997-05-02 | Tokai Carbon Co Ltd | Nondestructive inspection method for material flaw part |
| CN1338627A (en) * | 2001-07-30 | 2002-03-06 | 西北工业大学 | Method and equipment for observing frozen organization of metal material and researching its rheologic behavour |
| CN1579606A (en) * | 2003-08-01 | 2005-02-16 | 中国科学院金属研究所 | Transparent model alloy device |
| CN101308077A (en) * | 2008-06-17 | 2008-11-19 | 中国科学院过程工程研究所 | Apparatus and method for measuring middle and low-temperature smelt surface tension, density and wettability |
| CN101323919A (en) * | 2008-07-25 | 2008-12-17 | 哈尔滨工业大学 | Method for preparing metal-matrix composite by vacuum pressure infiltration |
| CN102328066A (en) * | 2011-08-31 | 2012-01-25 | 中国科学院金属研究所 | Vacuum-positive pressure smelting and solidifying equipment |
| CN102590455A (en) * | 2012-02-16 | 2012-07-18 | 西北工业大学 | Device and method for measuring infiltration characteristic of vacuum air-pressure infiltration method |
| CN104089972A (en) * | 2014-07-18 | 2014-10-08 | 大连理工常州研究院有限公司 | Method for determining condensate depression of metal micro-drops during rapid solidification process and device used by method |
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| CN207043304U (en) * | 2017-06-23 | 2018-02-27 | 深圳市拓利兴科技有限公司 | A kind of new die casting |
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