CN207197955U - A kind of device of pulse current auxiliary creep ageing - Google Patents
A kind of device of pulse current auxiliary creep ageing Download PDFInfo
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- CN207197955U CN207197955U CN201721212466.3U CN201721212466U CN207197955U CN 207197955 U CN207197955 U CN 207197955U CN 201721212466 U CN201721212466 U CN 201721212466U CN 207197955 U CN207197955 U CN 207197955U
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- pulse current
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- conductor wire
- testing machine
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Abstract
The utility model provides a kind of device of pulse current auxiliary creep ageing, including pulse current transmitter and testing machine；Treat that the both ends of the sample of creep are connected by fixture with the upper and lower stretch rod of the testing machine respectively；The both ends of the sample are also respectively fixed with a conductive electrode, connected respectively by resistant to elevated temperatures conductor wire between the pulse current transmitter and two conductive electrodes, one end of the conductive electrode is directly connected to the sample, the other end is connected with conductor wire so that forms current loop between pulse current transmitter, sample, conductor wire and conductive electrode；The high temperature furnace for providing temperature needed for experiment is additionally provided with testing machine；It is additionally provided with sample for the temperature measuring equipment of real-time monitoring test temperature and the bar of extending for monitoring sample deformation.Using device of the present utility model under equal power, the pulse current density for flowing through sample can be bigger, and will not produce fever phenomenon in contact position.
Description
Technical field
Material creep test device technical field is the utility model is related to, particularly, it is compacted to be related to a kind of pulse current auxiliary
Become the device of timeliness.
Background technology
With the fast development of modern aerospace cause, the requirement more and more higher to aeroplane performance, many primary load bearing structures
The widely used integrated structure design such as the joint of part such as aircraft, crossbeam, dividing plate, wing frame.Creep age forming technology is for system
The new technology to grow up for large-scale integral wall plate class member.
Recent domestic has had many scholars that pulse current is incorporated into the heat treatment of material, studies and confirms
Pulse current can produce positive effect to material heat treatment.Tsing-Hua University Jiang Yan is refined and the scholar such as Northeastern University's Li Guodong is led to
Overtesting finds that pulse current can make alloy realize quick timeliness, alloy is reached peak value timeliness.And
Applicant has carried out substantial amounts of experimental study also for pulse current is incorporated into aluminium alloy creep ageing/stress relaxation timeliness,
It was found that pulse current can increase the creep compliance of aluminium alloy, creep/stress relaxation rate is improved, during so as to shorten peak value timeliness
Between, material property is improved, while sensitiveness of the material property to primary stress can also be reduced.
It is existing research find, by current field, magnetic coupling to normative heat treatment temperature field in, may be in the short period
The interior significant properties for improving metal material.In the theoretical frame of continuous system physics, thermal energy field and current field,
Magnetic field belongs to the different-energy form for acting on material, and the macroscopic property of material is had opposite impacts on.From electronics, atomic layer
Surface analysis, their main function object is different, and electronic specific heat is small, and thermal energy field mainly acts on cation, and electric current
Field, magnetic field have a major impact to electronic state.Thermal energy field is verified with being heat-treated solid-state phase changes in the Composite Field in current field/magnetic field
New feature, it is one, Materials Science and Engineering field important scientific issues.In a word, whether current field or magnetic field, cold physics
The phase transition process that field is all triggered to physical field has an impact, and shows macro property and microstructure aspect.This is just material
It is modified to bring opportunity with innovation.Erdmann-Jesnitzer et al. has found to act on DC current for the first time in nineteen fifty-nine
The ag(e)ing process (aging temp be 80.6 DEG C) of Fe-C alloys after solid solution, can accelerated ag(e)ing reaction, and apply 50HZ exchange
Validity response when electric current has but delayed.Since then more scholar (Constant Direct Current electric current, continuously exchanges various forms of electric currents again
Electric current, positive pulse electric current, positive and negative alternation pulse current) it is applied to the heat treatment phase transition process of different metal material, disclose not
Same affecting laws.
CN105716964A discloses a kind of sealing electric installation that pulse current is introduced to autoclave, by through hot pressing
The electrode of tank and the connection for passing to electric current, the conductive seal disk for sealing vacuum bag coordinate, and pulse current is incorporated into
In the creep age forming technique of component.But because the sectional area of component is big, even the high current of a few kiloamperes, and flow through
The current density of member section will very little, it is likely that and electron stream caused by pulse current acts on very little to the atom in crystal,
It is unable to reach preferable result of the test.
In order to further study influence of the pulse current to creep age forming, it is necessary to which highdensity pulse current is introduced
Into the creep ageing experiment of the creep sample of test-material yardstick, explore a kind of device of pulse current auxiliary creep ageing just has very much
It is necessary.
Utility model content
The utility model purpose is to provide a kind of device of pulse current auxiliary creep ageing, to study highdensity arteries and veins
Rush the technical problem of influence of the electric current to creep age forming.
To achieve the above object, the utility model provides a kind of device of pulse current auxiliary creep ageing, including arteries and veins
Rush current transmitters and testing machine；
Treat that the both ends of the sample of creep are connected by fixture with the upper and lower stretch rod of the testing machine respectively；The sample
Both ends be also respectively fixed with a conductive electrode, lead to respectively between the pulse current transmitter and two conductive electrodes
Resistant to elevated temperatures conductor wire connection is crossed, one end of the conductive electrode is directly connected to the sample, and the other end is connected with conductor wire,
So that form current loop between the pulse current transmitter, the sample, the conductor wire and conductive electrode；The experiment
High temperature furnace is further fixed on machine, it is described high temperature furnace used in the temperature needed for offer experiment；Thermometric dress is additionally provided with the sample
Put and extend bar, the temperature measuring equipment is used for real-time monitoring test temperature, and the bar of extending is used for the deformation for monitoring sample.
Especially, collets are respectively arranged with two stretch rods.
Especially, the collets are made of polytetrafluoroethylmaterial material.
Especially, the outer wrap of the conductor wire has high temperature resistant mica material.
Especially, the conductive electrode is L-shaped copper plate, and red copper is provided with one of plate of the L-shaped copper plate
The tabletting of material, the conductor wire are connected by the tabletting with the L-shaped copper plate；Another block of plate of the L-shaped copper plate
Linked together with the sample and the fixture by same fastener, so as to ensure that sample and the L-shaped copper plate
Stress is consistent in loading procedure while being directly connected to, and then ensure that the accuracy of result of the test.
Especially, the high temperature furnace, which is divided into two, to be separately fixed at the examination with the die cavity of folding, two die cavities
Test on the support column of machine.
Especially, each die cavity is connected by two C-clamps with the support column respectively so that the die cavity energy
Turned an angle around the support column；The support column and the C-clamp are prepared using magnetic material so that both
Can adsorbed close, in order to avoid C-clamp down slides along the support column.
Especially, the temperature measuring equipment uses thermocouple, and between the thermocouple and the sample using mica sheet every
Absolutely, prevent high current from flowing through thermocouple and bringing damage to system for detecting temperature.
Using the technical solution of the utility model, have the advantages that：
1st, the pulse current that closure is constituted using pulse current transmitter, conductor wire, two conductive electrodes and sample is returned
Road, the pulse current loop part is few, and resistance is small, and under equal power, the pulse current density for flowing through sample will
It is bigger.
2nd, two conductive electrodes directly contact with sample, avoid and use high current caused by intermetallic metal connector to flow through
The influence of metal connecting piece and caused joule heating effect；Both direct contacts considerably increase conductive electrode and creep simultaneously
The contact area of sample.
Therefore, because the increase of contact area, when high current (hundreds of even several kiloamperes) flows through both contact positions, electricity
Current density will drastically reduce, and the phenomenon in contact position heating would not occur here, to whole creep ageing process just not
Have the influence that heating is brought.
3rd, conductive electrode and sample and fixture are linked together by same fastener, then in creep ageing process
In, what conductive electrode was subject to is fastener to active force, do not interfere with the stress feelings of creep sample in the place that both contact
Condition, so as to ensure that creep sample left and right stress in loading procedure is consistent, left and right deflection reaches unanimity, and then ensure that examination
Test the accuracy of result.
4th, collets have been used in the stretch rod contact position of fixture and testing machine, then aid in creep ageing in pulse current
During, pulse current would not flow through device elsewhere, and the danger of testing machine may be flowed through by avoiding high current, really
The safe handling of test apparatus is protected.
5th, in the contact position of sample and thermocouple, separated using mica sheet, avoid thermocouple and with high current
Sample directly contacts, so as to avoid high current from flowing through the destruction that thermoelectricity is brought to system for detecting temperature occasionally.
6th, high temperature furnace of the present utility model slaps together for the die cavities of two foldings, each die cavity using C-clamp with
The support column of testing machine coordinates, and can carry out the rotation of certain angle, therefore the opening and closing of high temperature furnace is more convenient and do not interfered with
Sample picks and places.
7th, the utility model is simple and practical, and can be applicable the creep sample of different-thickness in highdensity pulse current
Lower progress creep ageing experiment.
In addition to objects, features and advantages described above, the utility model also has other purposes, feature and excellent
Point.Below with reference to figure, the utility model is described in further detail.
Brief description of the drawings
The accompanying drawing for forming the part of the application is used for providing further understanding to of the present utility model, of the present utility model
Schematic description and description is used to explain the utility model, does not form to improper restriction of the present utility model.
In the accompanying drawings：
Fig. 1 is the overall diagram (high temperature furnace closure state) of device in embodiment 1；
Fig. 2 is the overall diagram (high temperature furnace opening) of device in embodiment 1；
Fig. 3 is the attachment structure schematic diagram of pulse current transmitters and sample in embodiment 1；
Fig. 4 is the part-structure front view of device in embodiment 1；
Fig. 5 is the part-structure side view of device in embodiment 1；
Fig. 6 is the structural representation of conductive electrode in embodiment 1；
Fig. 7 is the connection diagram of testing machine and high temperature furnace in embodiment 1；
Fig. 8 is the attachment structure schematic diagram of sample and thermocouple in embodiment 1；
Reference：
1st, pulse current transmitter, 2, conductor wire, 3, high temperature furnace, 4, testing machine, 5, fixture, 6, stretch rod, 7, collets,
8th, sample, 9, conductive electrode, 10, bar of extending, 11, bolt, 12, tabletting, 13, support column, 14, C-clamp, 15, mica sheet,
16th, thermocouple.
Embodiment
Embodiment of the present utility model is described in detail below in conjunction with accompanying drawing, but the utility model can be according to power
Profit requires to limit and the multitude of different ways of covering is implemented.
Embodiment 1
Refer to Fig. 1-Fig. 8, a kind of device of pulse current auxiliary creep ageing, including pulse current transmitter 1 and experiment
Machine 4, the pulse current transmitter in the present embodiment can provide the adjustable positive pulse electric currents of 0~3000A, wherein frequency range
For 0~1000HZ, duty cycle range is 0~99%, and this device provides adjustable for pulse current auxiliary aluminum alloy creep timeliness
The pulse current of section；This testing machine is high-temerature creep permanent strength testing machine.
Fig. 3 is referred to, treats that the both ends of the sample 8 of creep are also respectively fixed with a conductive electrode 9, the pulse current transmitting
Connected respectively by resistant to elevated temperatures conductor wire 2 between device and two conductive electrodes, the conductor wire is to bear high current
Non-generic conductor wire.It is bolted and sample is attached on conductive circuit electrode surface, such pulse current is sent from positive pole, is led to
Conductor wire is crossed, flows through a conductive electrode；Sample is again passed through, flows through another conductive electrode, then through conductor wire, eventually flow into arteries and veins
The negative pole of power supply is rushed, forms complete make pulse current loop.The outer wrap of the conductor wire has high temperature resistant mica material
(can also be other resistant to elevated temperatures insulating materials) so that the conductor wire is unaffected under hot test environment, while
Insulation environment can be formed.
Refer to Fig. 6, the conductive electrode is L-shaped copper plate (can also use the good material of other conductances), L-shaped red copper
Be provided with three a diameter of 8mm circular hole on the conductive electrode of plate shape altogether, the conductive electrode of L-shaped red copper plate shape one of them
Set a circular hole to be used for being connected with sample on plate, set two circular holes to be used for fixing conductor wire on one block of plate in addition.Fixation is led
With the tabletting 12 (can also be the good material of other conductances) of 20 × 30 × 1mm thin red copper material by resistance to height when electric wire
The conductor wire of warm mica winding parcel is pressed on the plate of conductive electrode, and blending bolt 11 is fixed.
Fig. 4-Fig. 5 is referred to, treats the both ends of sample 8 of creep respectively by the upper and lower stretching of fixture 5 and the testing machine
Bar 6 connects；Fixture, sample and conductive electrode by being linked together by same fastener (can be bolt etc.), so as to
It ensure that stress is consistent in loading procedure while sample is directly connected to conductive electrode, and then ensure that the essence of result of the test
Exactness.
It is respectively arranged with two stretch rods using collets 7 made of polytetrafluoroethylmaterial material, there is high intensity,
It is resistant to 260 DEG C or so of high temperature.Collets can also use the material of other high intensity, good insulation preformance to prepare, and avoid
High current may flow through the danger of testing machine, it is ensured that the safe handling of test apparatus.
Bar 10 of extending is additionally provided with the testing machine, the bar of extending is separately fixed at the upper and lower of sample, for supervising
The deformation of test specimens.
Fig. 7 is referred to, high temperature furnace 3 is further fixed on the testing machine, it is described high temperature furnace used in the temperature needed for offer experiment.
The high temperature furnace be divided into two can with the die cavity of folding, each die cavity respectively by two C-clamps 14 with
The support column 13 of testing machine connects so that the die cavity can turn an angle around the support column；The support column and institute
State C-clamp using magnetic material prepare so that both can adsorbed close, in order to avoid C-clamp along the support column down
Slide.Can also be other settings at this, as long as can guarantee that the die cavity of high temperature furnace is fixed on the support columns and can rotated.
Fig. 8 is referred to, thermocouple 16 is additionally provided with the sample, the thermocouple is used for real-time monitoring test temperature；And
Being completely cut off between the thermocouple and the sample using mica sheet 15 (can also use other good insulation preformances and resistant to elevated temperatures material
Material is completely cut off), prevent high current from flowing through thermocouple and bringing damage to system for detecting temperature.
Preferred embodiment of the present utility model is the foregoing is only, is not limited to the utility model, for this
For the technical staff in field, the utility model can have various modifications and variations.It is all in the spirit and principles of the utility model
Within, any modification, equivalent substitution and improvements made etc., it should be included within the scope of protection of the utility model.
Claims (8)
1. a kind of device of pulse current auxiliary creep ageing, it is characterised in that including pulse current transmitter (1) and testing machine
(4)；
Treat that the both ends of the sample (8) of creep are connected by fixture (5) with the upper and lower stretch rod (6) of the testing machine respectively；Institute
The both ends for stating sample are also respectively fixed with a conductive electrode (9), the pulse current transmitter and two conductive electrodes
Between connected respectively by resistant to elevated temperatures conductor wire (2), one end of the conductive electrode is directly connected to the sample, the other end
It is connected with conductor wire so that form electric current between the pulse current transmitter, the sample, the conductor wire and conductive electrode
Loop；High temperature furnace (3) is further fixed on the testing machine, it is described high temperature furnace used in the temperature needed for offer experiment；The sample
On be additionally provided with temperature measuring equipment and extend bar (10), the temperature measuring equipment is used for real-time monitoring test temperature, and the bar of extending is used
In the deformation of monitoring sample.
A kind of 2. device of pulse current auxiliary creep ageing according to claim 1, it is characterised in that two drawings
Collets (7) are respectively arranged with boom.
A kind of 3. device of pulse current auxiliary creep ageing according to claim 2, it is characterised in that the collets
It is made of polytetrafluoroethylmaterial material.
A kind of 4. device of pulse current auxiliary creep ageing according to claim 1, it is characterised in that the conductor wire
Outer wrap have high temperature resistant mica material.
A kind of 5. device of pulse current auxiliary creep ageing according to claim 1, it is characterised in that the conductive electricity
Extremely L-shaped copper plate, the tabletting (12) of red copper material, the conductor wire are provided with one of plate of the L-shaped copper plate
It is connected by the tabletting with the L-shaped copper plate；Another block of plate and the sample and the fixture of the L-shaped copper plate lead to
Same fastener is crossed to link together.
A kind of 6. device of pulse current auxiliary creep ageing according to claim 1, it is characterised in that the high temperature furnace
Being divided into two can be separately fixed on the support column (13) of the testing machine with the die cavity of folding, two die cavities.
A kind of 7. device of pulse current auxiliary creep ageing according to claim 6, it is characterised in that each type
Chamber is connected by two C-clamps (14) with the support column respectively so that the die cavity can surround the support column and rotate one
Determine angle；The support column and the C-clamp are prepared using magnetic material.
A kind of 8. device of pulse current auxiliary creep ageing according to claim 1, it is characterised in that the thermometric dress
Put and use thermocouple (16), and completely cut off between the thermocouple and the sample using mica sheet (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721212466.3U CN207197955U (en) | 2017-09-19 | 2017-09-19 | A kind of device of pulse current auxiliary creep ageing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721212466.3U CN207197955U (en) | 2017-09-19 | 2017-09-19 | A kind of device of pulse current auxiliary creep ageing |
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| Publication Number | Publication Date |
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| CN207197955U true CN207197955U (en) | 2018-04-06 |
Family
ID=61788261
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721212466.3U Active CN207197955U (en) | 2017-09-19 | 2017-09-19 | A kind of device of pulse current auxiliary creep ageing |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109570321A (en) * | 2018-11-26 | 2019-04-05 | 中南大学 | A method of for promoting creep forming |
| CN109752263A (en) * | 2019-03-12 | 2019-05-14 | 中南大学 | A kind of high-precision creep test device |
| CN110614285A (en) * | 2019-09-29 | 2019-12-27 | 吉林大学 | High-energy pulse current auxiliary forward extrusion processing device and method |
| CN112453204A (en) * | 2020-11-05 | 2021-03-09 | 中南大学 | Method and device for integrally forming shape of alloy complex component |
| CN113000667A (en) * | 2021-03-12 | 2021-06-22 | 上海交通大学 | Electric-assisted superplastic forming and aging treatment full-flow manufacturing method for aluminum-lithium alloy thin-wall component |
| CN113640637A (en) * | 2020-04-27 | 2021-11-12 | 中国科学院大连化学物理研究所 | Clamp for auxiliary measurement of performances of thin film and soft and brittle thermoelectric material and application of clamp |
-
2017
- 2017-09-19 CN CN201721212466.3U patent/CN207197955U/en active Active
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109570321A (en) * | 2018-11-26 | 2019-04-05 | 中南大学 | A method of for promoting creep forming |
| CN109570321B (en) * | 2018-11-26 | 2020-06-26 | 中南大学 | Method for promoting creep forming |
| CN109752263A (en) * | 2019-03-12 | 2019-05-14 | 中南大学 | A kind of high-precision creep test device |
| CN110614285A (en) * | 2019-09-29 | 2019-12-27 | 吉林大学 | High-energy pulse current auxiliary forward extrusion processing device and method |
| CN113640637A (en) * | 2020-04-27 | 2021-11-12 | 中国科学院大连化学物理研究所 | Clamp for auxiliary measurement of performances of thin film and soft and brittle thermoelectric material and application of clamp |
| CN112453204A (en) * | 2020-11-05 | 2021-03-09 | 中南大学 | Method and device for integrally forming shape of alloy complex component |
| CN112453204B (en) * | 2020-11-05 | 2022-06-10 | 中南大学 | Method and device for integrally forming shape of alloy complex component |
| CN113000667A (en) * | 2021-03-12 | 2021-06-22 | 上海交通大学 | Electric-assisted superplastic forming and aging treatment full-flow manufacturing method for aluminum-lithium alloy thin-wall component |
| CN113000667B (en) * | 2021-03-12 | 2022-06-03 | 上海交通大学 | Electric-assisted superplastic forming and aging treatment full-flow manufacturing method for aluminum-lithium alloy thin-wall component |
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