CN103234872B - Equipment for measuring metal melt diffusion by using multi-layer translation shearing unit method - Google Patents
Equipment for measuring metal melt diffusion by using multi-layer translation shearing unit method Download PDFInfo
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- CN103234872B CN103234872B CN201310153997.XA CN201310153997A CN103234872B CN 103234872 B CN103234872 B CN 103234872B CN 201310153997 A CN201310153997 A CN 201310153997A CN 103234872 B CN103234872 B CN 103234872B
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- 238000009792 diffusion process Methods 0.000 title claims abstract description 71
- 238000000034 method Methods 0.000 title claims abstract description 32
- 239000002184 metal Substances 0.000 title claims abstract description 22
- 238000013519 translation Methods 0.000 title claims abstract description 11
- 238000010008 shearing Methods 0.000 title abstract 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 94
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 94
- 239000010439 graphite Substances 0.000 claims abstract description 94
- 238000001816 cooling Methods 0.000 claims abstract description 7
- 238000005259 measurement Methods 0.000 claims abstract description 7
- 238000003466 welding Methods 0.000 claims description 46
- 239000004575 stone Substances 0.000 claims description 33
- 239000000463 material Substances 0.000 claims description 5
- 238000011160 research Methods 0.000 abstract description 8
- 238000005266 casting Methods 0.000 abstract description 3
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- 230000004927 fusion Effects 0.000 abstract 1
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- 239000000956 alloy Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 239000007788 liquid Substances 0.000 description 5
- 238000013461 design Methods 0.000 description 3
- 230000008676 import Effects 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
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- 230000014759 maintenance of location Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910001092 metal group alloy Inorganic materials 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000003032 molecular docking Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
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- 238000012856 packing Methods 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The invention discloses equipment for measuring metal melt diffusion by using a multi-layer translation shearing unit method. The equipment is characterized in that a frame is arranged in a vacuum cavity; a diffusion table made of graphite is fixed in the frame; a heater is arranged at the periphery of the diffusion table; a first sample post cavity, a second sample post cavity and a preset sample post cavity are respectively arranged in the diffusion table; the first sample post cavity and the second sample post cavity are arranged in the manner that the first sample post cavity is at an upper position, the second sample post cavity is at a lower position and both the first sample post cavity and the second sample post cavity are located the same vertical axis position; the preset sample poke cavity is located at the left side of the first sample post cavity; and the diffusion table is respectively provided with a preheating state position, a fusion state position and a cooling state position. By adopting the equipment for measuring metal melt diffusion, precision measurement of a metal melt diffusion coefficient by using a shearing unit method is achieved, and reliable support is provided for conducting relevant metal research and casting.
Description
Technical field
The present invention relates to the equipment that a kind of multilayer translation cut cells method measures metal bath diffusion, for the measurement of binary or multicomponent alloy or other nonmetallic materials interdiffusion coefficient in the molten state.
Background technology
Forefathers are had for the research of liquid diffusion under normal temperature and does excessive quantity research, as copper-bath spreads in water.But due to the restriction of technical conditions, up to now good diffusion facilities also be there is no for high-temperature molten metal alloy melt.
The dispersal behavior of metal bath is played an important role in the process of setting of melt, is the crucial kinetic parameter affecting crystal nucleation and growth process.Find in the research of some alloy systems, the coefficient of diffusion changing melt directly can change component distributing and the microscopic appearance of solidified structure, and therefore, the coefficient of diffusion of metal bath is also one of parameters necessary carrying out metal material design.Consider that metal bath is the special disordered structure system of a class, its structure is relatively simple, can describe with hard sphere close packing model, therefore study a kind of like this mass transport character of system, contribute to the universal law of the mass transport process of deep understanding disordered state system.For the alloy system of some uniqueness, the dispersal behavior of its melt correspondingly shows singularity, such as, in block metal glass alloy melt, its coefficient of diffusion 2-3 order of magnitude less of general simple metal melt, show typically slow dispersal behavior, the coefficient of diffusion therefore studying melt is also the importance of understanding alloy melt character.Since the paper about Brownian movement that the discovery of 1855 Fick'ss law of diffusion and einstein in 1905 are delivered, people have had the history of more than 100 year to the research of liquid diffusion phenomena, but the research of people's liquid towards metal dispersal behavior only has the time of decades, and measuring technique and theory are all immature.Such as, the coefficient of diffusion measuring same system with diverse ways is often widely different, and some difference are even more than 1 times.Cut cells method is considered to one of more accurate method, it is separated from one another when its main thought one is before two diffusion samples reach default holding temperature, avoid the atoms permeating in temperature-rise period, another is, after completing insulating process, diffusion couple is separated into multiple junior unit, to avoid the atoms permeating in cooling procedure.Adopt rotation mode to carry out in existing cut cells method, the model built and selected material have much relations, and occupied by central shaft due to constructed diffusion platform center, more for having problems in experimentation, be unfavorable for that X ray test equipment carries out in site measurement.
Summary of the invention
The present invention is the weak point for avoiding existing for above-mentioned prior art, a kind of multilayer translation cut cells method is provided to measure the equipment of metal bath diffusion, to cut cells method can be utilized to measure accurately metal bath coefficient of diffusion, provide reliable foundation for being engaged in relevant metal research and casting.
The present invention is that technical solution problem adopts following technical scheme:
The design feature that multilayer translation cut cells method of the present invention measures the equipment of metal bath diffusion is:
In vacuum cavity, arrange a framework, being fixedly installed in described framework with graphite is the diffusion platform of material, arranges well heater in the periphery of described diffusion platform; The first sample column chamber, the second sample column chamber and default sample column chamber is respectively arranged with in described diffusion platform, described first sample column chamber and the second sample column chamber be with the first sample column chamber upper, the second sample column chamber under be on same vertical axis position, described default sample column chamber is in the left side in described first sample column chamber;
Described diffusion platform is made up of the stacked pressure of strip graphite flake layer in level, comprising: one group of graphite flake that moves to right that can pass to the right, one group of anchor stone ink sheet be fixedly installed, and the welding graphite flake that a slice can independently be passed to the right;
Described welding graphite flake is in the middle part of diffusion platform, with described welding graphite flake neighbouring be the graphite flake that moves to right, above and below described welding graphite flake, each move to right graphite flake and each anchor stone ink sheet are arranged at interval one by one;
The described graphite flake that moves to right, anchor stone ink sheet and welding graphite flake are respectively arranged with vertical through holes, comprise: on described move to right graphite flake and anchor stone ink sheet, be all respectively arranged with left side vertical through holes and right side vertical through holes in the first from left right side, only vertical through holes on the left of left side arranges on described welding graphite flake; Connected by the vertical through holes be separately positioned on the graphite flake that moves to right, anchor stone ink sheet and welding graphite flake on correspondence position to be formed in described first sample column chamber, the second sample column chamber and default sample column chamber;
Described diffusion platform has three mode bits:
Preheat mode position: described in each left side vertical through holes in graphite flake, anchor stone ink sheet and welding graphite flake that moves to right align on same vertical position and be formed through default sample column chamber; The described each right side vertical through holes moved to right in graphite flake and anchor stone ink sheet is alignd on same vertical position, and middle part intercepts with welding graphite flake and forms the first sample column chamber and the second sample column chamber respectively;
As-welded position: described in move to right graphite flake and anchor stone ink sheet remain on preheat mode position, described welding graphite flake with vertical through holes on the left of it by the first sample column chamber and the second sample column chamber through in as-welded;
State of cooling position: described anchor stone ink sheet and welding graphite flake remain on as-welded position, the described vertical through holes sequence moved to right in vertical through holes in graphite flake and anchor stone ink sheet and welding graphite flake, makes described first sample column chamber and the second sample column chamber vertically be divided into mutually isolated each post chamber.
The design feature that multilayer translation cut cells method of the present invention measures the equipment of metal bath diffusion is also:
Described each anchor stone ink sheet is connected on right column, and arrange the described graphite flake that respectively moves to right and be connected on left column, wherein right column is for being fixedly installed, and left column synchronously can move right by the drive graphite flake that respectively moves to right under the promotion of " C " type framework.
Horizontal push is set in the left side of described welding graphite flake, in order to promote described welding graphite flake in moving horizontally.
Compared with the prior art, beneficial effect of the present invention is embodied in:
1, the present invention makes the method for cut cells be achieved, and on the one hand, each other for being separated time before two diffusion samples reach default holding temperature, avoids the atoms permeating in temperature-rise period; On the other hand, after completing insulating process, diffusion couple is separated into multiple sample segments, effectively prevent the atoms permeating in cooling procedure, such that follow-up to carry out the measurement of coefficient of diffusion for diffusion samples more accurate rationally.
2, the present invention adopts the mode moved horizontally, and can ensure that sample is in the center of heating system all the time, makes diffusion couple homogeneous temperature in diffusion process, stable.And in experiment measuring process, the convenient X ray that adopts carries out in site measurement.
In the cut cells method of 3, prior art rotation mode, because needs rotate blade, normally adopt 3-4mm thickness graphite flake to test, reduce the degree of accuracy of diffusion analysis sample.The present invention adopts the mode moved horizontally, and the thickness of the graphite flake moved in parallel can be reduced to 1mm and even be less than 1mm, improves the degree of accuracy of diffusion analysis sample.
4, present device simple, be easy to realize, can be widely used in the various occasions such as teaching, experiment, scientific research and production.
Accompanying drawing explanation
Fig. 1 is the test macro schematic diagram formed with the present invention;
Fig. 2 is that platform structural representation is spread in the present invention;
Fig. 3 a spreads platform assembling schematic diagram in the present invention;
Fig. 3 b is graphite flake structural representation in the present invention;
Fig. 4 a spreads platform first mode bit schematic diagram in the present invention;
Fig. 4 b spreads platform second mode bit schematic diagram in the present invention;
Fig. 4 c spreads platform third state position schematic diagram in the present invention;
Number in the figure: 1 vacuum cavity; 2 frameworks; 3 heater elements; 4 diffusion platforms; 5 left columns; 6 right columns; 7a first sample column chamber; 7b second sample column chamber; 7c presets sample column chamber; 8 welding graphite flakes; 9 is " L " type support; 9a blind hole; 10 fixing alundum tubes; 11 is " C " type framework; 12 horizontal push; 13 vacuum ports; 14 temperature controllers; 15 refrigerating gases import port; 16 gas cylinders; 17 vacuum pump groups.
Embodiment
See Fig. 1 and Fig. 2, in the present embodiment, the version of the equipment of multilayer translation cut cells method measurement metal bath diffusion is:
In vacuum cavity 1, arrange a framework 2, being fixedly installed in framework 2 with graphite is the diffusion platform 4 of material, arranges well heater 3 in the periphery of diffusion platform 4; The first sample column chamber 7a, the second sample column chamber 7b and default sample column chamber 7c is respectively arranged with in diffusion platform, first sample column chamber 7a and the second sample column chamber 7b be with the first sample column chamber 7a upper, the second sample column chamber 7b under be on same vertical axis position, preset the left side that sample column chamber 7c is in the first sample column chamber 7a;
As shown in Figure 3 a and Figure 3 b shows, diffusion platform 4 is made up of the stacked pressure of strip graphite flake layer in level, comprise: one group of the graphite flake 4a that moves to right that can pass to the right, one group of anchor stone ink sheet 4b be fixedly installed, and the welding graphite flake 8 that a slice can independently be passed to the right;
Welding graphite flake 8 is in the middle part of diffusion platform, with welding graphite flake 8 neighbouring be the graphite flake 4a that moves to right, above and below welding graphite flake 8, each graphite flake 4a and each anchor stone ink sheet 4b that moves to right is arranged at interval one by one;
The graphite flake 4a that moves to right, anchor stone ink sheet 4b and welding graphite flake 8 are respectively arranged with vertical through holes, comprise: graphite flake 4a and anchor stone ink sheet 4b is all respectively arranged with left side vertical through holes and right side vertical through holes in the first from left right side moving to right, only vertical through holes on the left of left side arranges on welding graphite flake 8; First sample column chamber 7a, the second sample column chamber 7b and default sample column chamber 7c are connected by the vertical through holes be separately positioned on the graphite flake 4a that moves to right, anchor stone ink sheet 4b and welding graphite flake 8 on correspondence position to be formed, and the horizontal interval of presetting between sample column chamber 7c and the first sample column chamber 7a is not less than 3 times of diameters of the first sample column chamber 7a;
Diffusion platform has three mode bits:
Preheat mode position shown in Fig. 4 a: in the graphite flake 4a that moves to right, anchor stone ink sheet 4b and welding graphite flake 8, each left side vertical through holes is alignd and is formed through default sample column chamber 7c on same vertical position; The each right side vertical through holes moved to right in graphite flake 4a and anchor stone ink sheet 4b is alignd on same vertical position, and middle part intercepts with welding graphite flake 8 and forms the first sample column chamber 7a and the second sample column chamber 7b respectively;
As-welded position shown in Fig. 4 b: the graphite flake 4a and anchor stone ink sheet 4b that moves to right remains on preheat mode position, welding graphite flake 8 with vertical through holes on the left of it by through for the first sample column chamber 7a and the second sample column chamber 7b in as-welded;
State of cooling position shown in Fig. 4 c: anchor stone ink sheet 4b and welding graphite flake 8 remain on as-welded position, vertical through holes sequence in the vertical through holes in graphite flake 4a of moving to right and anchor stone ink sheet 4b and welding graphite flake 8, makes the first sample column chamber 7a and the second sample column chamber 7b vertically be divided into mutually isolated each post chamber.
In concrete enforcement, corresponding setting also comprises:
Each anchor stone ink sheet 4b is connected on right column 6, and arrange the graphite flake 4a that respectively moves to right and be connected on left column 5, wherein right column 6 is for being fixedly installed, and left column 5 synchronously can move right by the drive graphite flake 4a that respectively moves to right under the promotion of " C " type framework 11.Horizontal push 12 is set in the left side of welding graphite flake 8, in order to promote welding graphite flake 8 in moving horizontally.
As shown in Figure 2, a pair " L " type support 9 fastens formation one rectangular inner cavity mutually, diffusion platform 4 matches in this rectangular inner cavity, " L " type support 9 is evenly distributed with axial draw-in groove, heater element 3 is positioned in each axial draw-in groove, for heating diffusion platform, in " L " type support 9, be provided with blind hole 9a vertically, for fixed L type support.On " L " type support 9 sidewall, diverse location is provided with aperture, carries out temperature survey for placing thermopair.
As shown in Figure 1, be respectively arranged with vacuum port 13 and refrigerating gas importing port one 5 in the bottom of vacuum cavity 1, under the control of vacuum pump group 17, vacuumize process by vacuum port 13 pairs of vacuum cavities 1; Gas cylinder 16 imports port one 5 by refrigerating gas and inject refrigerating gas in vacuum cavity 1.
Temperature controller 14 to heat, be incubated and lower the temperature controls to diffusion platform for the temperature control curve according to setting, and record temperature variation curve, record temperature retention time and temperature fall time warm more than spreading.
First sample and the second sample are the bar-shaped metal material to be measured of Φ 1.5mm, and utilize vacuum arc melting suction casting stove to produce and form, composition is accurate and even;
The method preparing diffusion samples in the present embodiment is carried out according to the following procedure:
Step one: arranging diffusion platform is preheat mode position, two first samples is placed in respectively the first sample cavity 7a and default sample cavity 7c, the second sample is placed in the second sample cavity 7b; By the process conditions of setting, diffusion platform is heated, make point to be in the first sample cavity 7a and default sample cavity 7c and neutralize the first sample in the second sample cavity 7b and the equal melting of the second sample is liquid state;
Step 2: pass welding graphite flake 8 to the right, diffusion platform is made to be in as-welded position, be that the first liquid sample utilizes the left side vertical through holes in welding graphite flake 8 to shift between the first sample cavity 7a and the second sample cavity 7b by melting in default sample cavity 7c by welding graphite flake 8, make the first sample and the second sample form diffusion couple in vertical docking; By the process conditions of setting, diffusion platform is incubated, makes the first sample and the second sample complete diffusion;
Step 3: after diffusion process terminates, promote to move to right graphite flake 4a to the right, make diffusion platform be in state of cooling position, therefore diffusion couple is vertically being divided into mutually isolated each sample section; Then in vacuum cavity 1, import refrigerating gas, make each sample section cooled and solidified namely obtain diffusion samples, refrigerating gas adopts percent by volume to reach the high pure nitrogen of 99.99%, to prevent sample oxidation and graphite burning.
Claims (3)
1. the equipment of multilayer translation cut cells method measurement metal bath diffusion, described equipment comprises: in vacuum cavity (1), arrange a framework (2), being fixedly installed in described framework (2) with graphite is the diffusion platform (4) of material, arranges well heater (3) in the periphery of described diffusion platform (4); It is characterized in that:
The first sample column chamber (7a), the second sample column chamber (7b) and default sample column chamber (7c) is respectively arranged with in described diffusion platform, described first sample column chamber (7a) and the second sample column chamber (7b) be with the first sample column chamber (7a) upper, the second sample column chamber (7b) under be on same vertical axis position, described default sample column chamber (7c) is in the left side in described first sample column chamber (7a);
Described diffusion platform (4) is made up of the stacked pressure of strip graphite flake layer in level, comprise: one group of graphite flake that moves to right (4a) that can pass to the right, one group of anchor stone ink sheet (4b) be fixedly installed, and the welding graphite flake (8) that a slice can independently be passed to the right;
Described welding graphite flake (8) is in the middle part of diffusion platform, with described welding graphite flake (8) neighbouring be the graphite flake (4a) that moves to right, above and below described welding graphite flake (8), each graphite flake that moves to right (4a) and each anchor stone ink sheet (4b) are arranged at interval one by one;
The described graphite flake that moves to right (4a), anchor stone ink sheet (4b) and welding graphite flake (8) are respectively arranged with vertical through holes, comprise: on the described graphite flake that moves to right (4a) and anchor stone ink sheet (4b), be all respectively arranged with left side vertical through holes and right side vertical through holes in the first from left right side, only vertical through holes on the left of left side arranges on described welding graphite flake (8); Connected by the vertical through holes be separately positioned on the upper correspondence position of the graphite flake that moves to right (4a), anchor stone ink sheet (4b) and welding graphite flake (8) to be formed in described first sample column chamber (7a), the second sample column chamber (7b) and default sample column chamber (7c);
Described diffusion platform has three mode bits:
Preheat mode position: described in each left side vertical through holes in graphite flake (4a), anchor stone ink sheet (4b) and welding graphite flake (8) that moves to right align on same vertical position and be formed through default sample column chamber (7c); Each right side vertical through holes in the described graphite flake that moves to right (4a) and anchor stone ink sheet (4b) is alignd on same vertical position, and middle part intercepts with welding graphite flake (8) and forms the first sample column chamber (7a) and the second sample column chamber (7b) respectively;
As-welded position: described in move to right graphite flake (4a) and anchor stone ink sheet (4b) remain on preheat mode position, described welding graphite flake (8) with vertical through holes on the left of it by the first sample column chamber (7a) and the second sample column chamber (7b) through in as-welded;
State of cooling position: described anchor stone ink sheet (4b) and welding graphite flake (8) remain on as-welded position, vertical through holes sequence in vertical through holes in the described graphite flake that moves to right (4a) and anchor stone ink sheet (4b) and welding graphite flake (8), makes described first sample column chamber (7a) and the second sample column chamber (7b) vertically be divided into mutually isolated each post chamber.
2. multilayer translation cut cells method according to claim 1 measures the equipment of metal bath diffusion, it is characterized in that: described each anchor stone ink sheet (4b) is connected on right column (6), arranging the described graphite flake (4a) that respectively moves to right is connected on left column (5), wherein right column (6) is for being fixedly installed, and left column (5) synchronously can move right by the drive graphite flake (4a) that respectively moves to right under the promotion of " C " type framework (11).
3. multilayer translation cut cells method according to claim 1 measures the equipment of metal bath diffusion, it is characterized in that: in the left side of described welding graphite flake (8), horizontal push (12) is set, in order to promote described welding graphite flake (8) in moving horizontally.
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| CN201310153997.XA CN103234872B (en) | 2013-04-27 | 2013-04-27 | Equipment for measuring metal melt diffusion by using multi-layer translation shearing unit method |
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| CN201310153997.XA CN103234872B (en) | 2013-04-27 | 2013-04-27 | Equipment for measuring metal melt diffusion by using multi-layer translation shearing unit method |
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| CN103234872B true CN103234872B (en) | 2015-03-11 |
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| CN106442224B (en) * | 2014-09-17 | 2019-01-11 | 合肥工业大学 | A method of metal melt diffusion sample is prepared based on thin layer diffusion model |
| CN104483241A (en) * | 2014-12-23 | 2015-04-01 | 合肥工业大学 | Graphite diffusion platform |
| CN105115854B (en) * | 2015-09-08 | 2017-08-11 | 合肥工业大学 | A kind of liquid metal density measuring apparatus |
| CN109507066A (en) * | 2018-10-24 | 2019-03-22 | 合肥工业大学 | A kind of metal solid diffusion facilities |
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| JP2000121532A (en) * | 1998-10-16 | 2000-04-28 | Natl Space Development Agency Of Japan | Diffusion testing apparatus |
| CN102645391B (en) * | 2012-04-11 | 2013-09-18 | 合肥工业大学 | Metal melt diffusion device |
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