CN206440644U - A kind of atmosphere laser heating thermal shock/fatigue experimental device in situ - Google Patents
A kind of atmosphere laser heating thermal shock/fatigue experimental device in situ Download PDFInfo
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- CN206440644U CN206440644U CN201720165107.0U CN201720165107U CN206440644U CN 206440644 U CN206440644 U CN 206440644U CN 201720165107 U CN201720165107 U CN 201720165107U CN 206440644 U CN206440644 U CN 206440644U
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- atmosphere
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- thermal shock
- laser
- fatigue experimental
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Abstract
The utility model discloses a kind of atmosphere laser heating thermal shock/fatigue experimental device in situ, including atmosphere box, atmosphere box is connected with vacuum plant or adjustable pressure relief valve of holding, sample clamping device, laser heating device and cooling device are provided with the atmosphere box, the saturating visible ray glass window of high temperature is offered on atmosphere tank wall, the saturating visible ray glass window of high temperature is externally provided with Crack Extension real-time monitoring device；The saturating infrared waves glass window of high temperature is further opened with atmosphere tank wall, the saturating infrared waves glass window of high temperature is externally provided with infrared temperature measurement apparatus；Also include control device.The utility model can realize thermal shock and heat fatigue on same device, the mode of heatings such as traditional flame, inductance, resistance are substituted using laser heating device, testing sample can quickly be heated, shorten the test period, the thermal fatigue test under different atmosphere and vacuum condition can be also realized, good with controllability, automaticity is high, low energy consumption, experimental period short advantage.
Description
Technical field
The utility model is related to mechanical engineering field, and in particular to a kind of atmosphere laser heating thermal shock in situ/fatigue examination
Experiment device.
Background technology
In engineering actual production process, there are many parts to be inevitably in oxidation/reduction atmosphere and be operated in
Under hot environment, and with violent temperature change, the parts thermal shock thus brought/fatigue damage destruction is hot junction
The principal mode of parts failure.To ensure its security, it is necessary to test its thermal shock/fatigability under different atmosphere environment
Can, develop through technology for many years, formed more perfect fatigue property test standard, adopted traditional thermal shock/fatigue experimental device more
Test specimen is heated with traditional heating modes such as flame, inductance, resistance, this causes the realization of high all heat fatigues to need to pay height
High time, fund cost.And it is difficult to realize vacuum and the thermal shock under different redox condition environment and heat fatigue
Performance test.On the other hand, the crack propagation of thermal fatigue resistance of material is used as the important finger for evaluating material thermal fatigue property quality
Mark, has important directive significance in practice of engineering design, however, traditional thermal shock/fatigue experimental device can not be realized
The real-time monitoring of On Crack Propagation.
Utility model content
Technical problem to be solved in the utility model is traditional thermal shock/fatigue experimental device, experimental period length, vacuum
And oxidation/reduction atmosphere is difficult the shortcoming that realization and Crack Extension can not be monitored in real time, it is therefore intended that provide a kind of gas
Atmosphere laser heating thermal shock/fatigue experimental device in situ, can make experimental period short, at the same can realize vacuum and different oxidations/
Performance test under reducing atmosphere environment, and monitoring in real time is carried out with research material in thermal fatigue course to the extension of crackle
In Crack Extension property.
The utility model is achieved through the following technical solutions：
A kind of atmosphere laser heating thermal shock/fatigue experimental device in situ, it is characterised in that including atmosphere box, atmosphere box
With vacuum plant or holding pressure relief valve and being connected, filled provided with sample clamping device, laser heating device and cooling in the atmosphere box
Put, the saturating visible ray glass window of high temperature is offered on atmosphere tank wall, it is real that the saturating visible ray glass window of high temperature is externally provided with Crack Extension
When monitoring device；The saturating infrared waves glass window of high temperature is further opened with atmosphere tank wall, the saturating infrared waves glass window of high temperature is externally provided with
Infrared temperature measurement apparatus；The laser heating device, cooling device, Crack Extension real-time monitoring device, infrared temperature measurement apparatus with
Control device is connected.
Experimental rig of the present utility model, the heating sides such as traditional flame, inductance, resistance are substituted using laser heating device
Formula, make use of the advantage that laser energy density is big, testing sample can quickly be heated, shorten the test period；It is logical
Cross progress thermal shock/fatigue test in atmosphere box, it is possible to achieve the sample under vacuum or different oxidation/reduction atmospheres
The test of product, for traditional thermal shock/fatigue test device, as the experimental provision using flame as mode of heating can not be realized
Experiment under vacuum environment；For some parts being on active service under vacuum conditions, if being tested under air conditionses, sample
The reaction such as oxidation easily occurs at high temperature, so as to influence test data；In addition, having not in fields such as chemical industry, energy source and powers
Few parts not only need tolerance high temperature also to need to undergo the corrosion of surrounding heterogeneity atmosphere, and these conditions are in traditional heat punching
Hit/fatigue experimental device in be all extremely difficult to realize.Therefore, the utility model mutually ties laser heating device with atmosphere device
Close, can not only accelerate the test period, while the accuracy of test data can also be improved, moreover it is possible to simulate vacuum or different oxygen
The thermal shock of material, fatigue process under change/reducing atmosphere environment；The saturating visible ray glass window of high temperature is offered on atmosphere tank wall,
The saturating visible ray glass window of high temperature is externally provided with Crack Extension real-time monitoring device, and the prison of Crack Extension can be provided for thermal fatigue test
Survey condition；Infrared temperature measurement apparatus can be detected by the saturating infrared waves glass window of high temperature to the temperature on testing sample surface,
Control device is received after temperature information, can control the work of laser heating device and cooling device.Can be on same device
Thermal shock and heat fatigue are realized, using vacuum system and pressure relief valve is held, be can be achieved under vacuum condition and different atmosphere environment
Thermal shock/fatigue test, good with controllability, automaticity is high, low energy consumption, experimental period short advantage.
The laser heating device includes laser and light-beam forming unit, and the laser is connected with control device, swashs
The opening and closing of light device are by control device control, and it is whole that the laser of laser output first passes around the light beam being made up of one group of lens
Shape dress puts adjustment beam diameter to meet the requirement of test specimen size, and final vertical irradiation enters in sample surfaces to test sample
Row heating, for traditional mode of heating, it is impossible to the size of regulating heat surface product, such as using flame heating, if test sample
It is smaller, although can be by the way that flame is turned down, but now the efficiency of heating surface will be reduced greatly, and laser heating device, pass through
Light-beam forming unit adjustment beam diameter can control the size of heating region, while not interfering with the heating work(of laser
Rate, this sample device can not only quickly be heated to whole sample, moreover it is possible to be realized to certain block region even some click-through
Row local heating is tested；And using laser heating, laser heat build-up is good, while lasers range can also be limited, it is difficult pair
Other devices cause high temperature failure, enhance the service life of device.
The cooling device includes cooling tube and flow control valve, and flow control valve is connected with control device, can by
It is passed through the test sample after gas medium of different nature terminates heating in cooling tube to cool down, flow control valve can be realized
Accurate control to cooling medium consumption size.In addition, gas of different nature can be provided for the present apparatus different condition (oxidation/
Reduction) atmosphere.
The Crack Extension real-time monitoring device includes light microscope and image collecting device, and light microscope is through high
Warm visible ray glass window thoroughly can be monitored to sample surfaces crack propagation process during thermal fatigue test, and pass through figure
As harvester is collected to it.
The vacuum plant includes vavuum pump and the vacuum valve being arranged on atmosphere tank wall, enters in the case where needing vacuum environment
During row experiment, it need to only open vacuum valve and start vavuum pump just.
In addition, whole vacuum system can facilitate dismounting and change to hold pressure relief valve, when needing atmosphere (oxidation/reduction) environment
During thermal shock/fatigue test condition, by by vacuum plant be replaced by it is adjustable hold pressure relief valve and pass in a cooling system and
Identical cooling gas is realized in atmosphere.
Atmosphere chamber interior wall and sample clamping apparatus surface are coated with zirconia ceramics coating, prevent atmosphere box and sample clamping
Corrosion oxidation occurs during hot test for device.
The laser is CO2Gas laser, has than larger power and high energy conversion efficiency.
It is connected by screw bolts between the inwall of the sample clamping device, laser heating device and atmosphere box, convenient maintenance
With displacement.
Atmosphere box uses stainless steel so that testing equipment long lifespan, and security performance is high.
The control device includes PC, NI/AO cards, NI/TC cards and NI necks, and the NI/AO cards are heated with laser and filled
Put connected, NI/TC cards are connected with infrared temperature measurement apparatus, for thermal shock test, impact temperature can be set and cooling is situated between
Mass flow amount, for thermal fatigue test, can set cycle-index, heat time, cooling medium consumption, cool time and heat fatigue
Up/down limits temperature, can show the surface temperature and surface heat Fatigue Cracks Propagation of testing sample on PC in real time
Situation.
The utility model compared with prior art, has the following advantages and advantages：
1st, a kind of atmosphere laser heating thermal shock/fatigue experimental device in situ of the utility model, using laser heating device
The mode of heatings such as traditional flame, inductance, resistance are substituted, the advantage that laser energy density is big is make use of, can be to testing sample
Quickly heated, shorten the test period, reliable experiment porch is provided for high all thermal fatigue tests, it is whole by light beam
Shape dress, which puts adjustment beam diameter, can adjust the heating region size of laser, while the heating power of laser is not interfered with,
This sample device can not only quickly be heated to whole sample, moreover it is possible to be realized to certain block region even some point progress office
Portion's heating is tested；And using laser heating, laser heat build-up is good, while lasers range can also be limited, is difficult to other
Device cause high temperature failure, enhance the service life of device；
2nd, a kind of atmosphere laser heating thermal shock/fatigue experimental device in situ of the utility model, carries out heat in atmosphere box
Impact/fatigue test, it is possible to achieve the test of the sample under different atmosphere (oxidation/reduction) or vacuum environment, so as to the greatest extent
The actual Service Environment of testing sample may be really simulated, the accuracy of test data is improved；
3rd, offered on a kind of atmosphere laser heating thermal shock/fatigue experimental device in situ of the utility model, atmosphere tank wall
The saturating visible ray glass window of high temperature, the saturating visible ray glass window of high temperature is externally provided with Crack Extension real-time monitoring device, so can be
Thermal fatigue test provides the monitoring condition of Crack Extension.
Brief description of the drawings
Accompanying drawing described herein is used for providing further understanding the utility model embodiment, constitutes the one of the application
Part, does not constitute the restriction to the utility model embodiment.In the accompanying drawings：
Fig. 1 is the utility model structural representation；
Fig. 2 is utility model works flow chart.
Mark and corresponding parts title in accompanying drawing：
1- atmosphere boxes, 2- sample clamping devices, 3- laser heating devices, the saturating visible ray glass window of 4- high temperature, 5- high temperature
Glass for infrared rays window, 6- infrared temperature measurement apparatus, 7- control devices, 8- lasers, 9- light-beam forming units, 10- cooling tubes,
11- flow control valves, 12- light microscopes, 13- image acquisition devices, 14- vacuum valves, 15- vavuum pumps.
Embodiment
For the purpose of this utility model, technical scheme and advantage is more clearly understood, with reference to embodiment and accompanying drawing,
The utility model is described in further detail, and exemplary embodiment of the present utility model and its explanation are only used for explaining this
Utility model, is not intended as limiting of the present utility model.
Embodiment
As shown in figure 1, a kind of atmosphere laser heating thermal shock/fatigue experimental device in situ of the utility model, including atmosphere
Case 1, atmosphere box and vacuum plant or holds pressure relief valve and is connected, and the vacuum plant includes vavuum pump 15 and is arranged on atmosphere tank wall
On vacuum valve 14, the atmosphere box inner bottom part be provided with sample clamping device 2, atmosphere box top inner wall provided with laser heating
Device 3, laser heating device includes laser 8 and the light-beam forming unit 9 being arranged on below laser, atmosphere box side and bottom
Face appropriate location is provided with a diameter of 60mm circular holes, and is inlaid with high temperature glass for infrared rays window 5 and the saturating visible ray of high temperature respectively
Glass window 4, light microscope 12 and image acquisition device 13 are placed on below the saturating visible ray glass window of high temperature, show optics
The camera lens of micro mirror faces the lower surface of testing sample, and infrared temperature measurement apparatus 6 is located at outside high temperature glass for infrared rays window, makes it
Positioned at the oblique upper of testing sample；Cooling tube 10 is additionally provided with atmosphere box wall, cooling tube one end is connected with flow control valve
Door 11, other end alignment sample surfaces, laser heating device, cooling device, Crack Extension real-time monitoring device, infrared measurement of temperature dress
Put and be connected with control device 7, control device 7 is connected to the top of atmosphere box.
Experimental rig of the present utility model, the upper lid of atmosphere box can be opened, and testing sample is placed during convenient experiment, will be to be measured
Sample is fixed on behind the bottom of atmosphere box by sample clamping device, and the laser of laser output is after light-beam forming unit
Vertical irradiation, so as to be heated to sample, light can be utilized for different samples in sample surfaces according to sample size size
Beam apparatus for shaping is adjusted to being irradiated in sample surfaces lasing beam diameter size, so that whole sample surfaces are all heated；
Infrared temperature measurement apparatus is a high-resolution thermal infrared imager, and thermal infrared imager includes the sample temperature data transfer detected
PC, and NI/TC cards are transferred to, NI/AO cards can control laser and flow control valve, so as to realize the heating to sample
With cooling；If desired tested under vacuum conditions, then open vacuum valve and start vavuum pump to keep vacuum in atmosphere box
Environment；The realization of similar oxidation/reduction atmosphere need by vacuum system be replaced by it is adjustable hold pressure relief valve, regulation is held pressure and let out
Pressure valve can keep stable atmosphere (oxidation/reduction) pressure in atmosphere box, and pass in cooling device the same gas
It is used as cooling medium.
In the above-mentioned technical solutions, the utility model has time control and temperature control both of which at the trial, its
Control flow is as shown in Figure 2.Time control pattern, heat time and cool time are set by control device, in each heat
During fatigue and cyclic when heated between reach after setting value, laser is stopped, adjustable flow control valve door open to survey
Test agent is cooled down；Temp-controled mode, sets heating-up temperature and cool time, in each heat fatigue by control device
In cyclic process after the temperature that infrared temperature measurement apparatus is measured reaches design temperature, laser is stopped, flow control valve
Opening is cooled down to testing sample.
Selected laser output power to control heating rate before on-test, cooling medium consumption and circulating cycle are set
It is secondary, setting heat fatigue ceiling temperature and lower limit temperature, when infrared measurement of temperature device monitoring to sample surface temperature exceedes the heat of setting
During tired ceiling temperature, control system will turn off laser and sample cooled down while opening flow control valve, hot
When outer thermometric device monitoring is less than the heat fatigue lower limit temperature of setting to sample surface temperature, control system will turn off flow
Control valve opens laser and sample is heated simultaneously.So constantly move in circles, until reaching the circulation cycle of setting.
Whole process of the test is the completion under the automatically controlling of PC, be can be achieved to heat fatigue cycle-index, heat fatigue bound temperature
Degree, heat time, cool time, the regulation of cooling medium consumption, also carry out video record by On Crack Propagation process.
It is preferred that, atmosphere chamber interior wall and sample clamping apparatus surface are coated with zirconia ceramics coating, prevent atmosphere box and
Corrosion oxidation occurs during hot test for sample clamping device.
It is preferred that, the laser is CO2Gas laser, has than larger power and high energy conversion efficiency.
It is preferred that, it is connected by screw bolts between the inwall of the sample clamping device, laser heating device and atmosphere box, side
Just maintenance and displacement.
Atmosphere box uses stainless steel so that testing equipment long lifespan, and security performance is high.
Above-described embodiment, is entered to the purpose of this utility model, technical scheme and beneficial effect
One step is described in detail, be should be understood that and be the foregoing is only embodiment of the present utility model, is not used to limit
Fixed protection domain of the present utility model, all any modifications within spirit of the present utility model and principle, made, is equally replaced
Change, improve, should be included within protection domain of the present utility model.
Claims (9)
1. a kind of atmosphere laser heating thermal shock/fatigue experimental device in situ, it is characterised in that including atmosphere box (1), atmosphere box
(1) with vacuum plant or holding pressure relief valve and being connected, provided with sample clamping device (2), laser heating device in the atmosphere box (1)
(3) the saturating visible ray glass window (4) of high temperature, the saturating visible ray glass window of high temperature and cooling device, are offered on atmosphere box (1) wall
(4) it is externally provided with Crack Extension real-time monitoring device；The saturating infrared waves glass window (5) of high temperature is further opened with atmosphere box (1) wall, it is high
Warm infrared waves glass window (5) thoroughly is externally provided with infrared temperature measurement apparatus (6)；The laser heating device (3), cooling device, crackle
Extension real-time monitoring device, infrared temperature measurement apparatus (6) are connected with control device (7).
2. a kind of atmosphere laser heating thermal shock/fatigue experimental device in situ according to claim 1, it is characterised in that
The laser heating device (3) includes laser (8) and light-beam forming unit (9), the laser (8) and control device (7)
It is connected.
3. a kind of atmosphere laser heating thermal shock/fatigue experimental device in situ according to claim 1 or 2, its feature exists
In the cooling device includes cooling tube (10) and flow control valve (11), flow control valve (11) and control device (7) phase
Even.
4. a kind of atmosphere laser heating thermal shock/fatigue experimental device in situ according to claim 3, it is characterised in that
The Crack Extension real-time monitoring device includes light microscope (12) and image collecting device (13).
5. a kind of atmosphere laser heating thermal shock/fatigue experimental device in situ according to claim 1,2 or 4, its feature
It is, the vacuum plant includes vavuum pump (15) and the vacuum valve (14) being arranged on atmosphere box (1) wall.
6. a kind of atmosphere laser heating thermal shock/fatigue experimental device in situ according to claim 1,2 or 4, its feature
It is, atmosphere box (1) inwall and/or sample clamping device (2) surface spraying have zirconia ceramics coating.
7. a kind of atmosphere laser heating thermal shock/fatigue experimental device in situ according to claim 2, it is characterised in that
The laser (8) is CO2Gas laser.
8. a kind of atmosphere laser heating thermal shock/fatigue experimental device in situ according to claim 1,2,4 or 7, it is special
Levy and be, be connected by screw bolts between the inwall of the sample clamping device (2), laser heating device (3) and atmosphere box (1).
9. a kind of atmosphere laser heating thermal shock/fatigue experimental device in situ according to claim 1,2,4 or 7, it is special
Levy and be, atmosphere box (1) uses stainless steel making.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720165107.0U CN206440644U (en) | 2017-02-23 | 2017-02-23 | A kind of atmosphere laser heating thermal shock/fatigue experimental device in situ |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720165107.0U CN206440644U (en) | 2017-02-23 | 2017-02-23 | A kind of atmosphere laser heating thermal shock/fatigue experimental device in situ |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108204994A (en) * | 2018-01-17 | 2018-06-26 | 长沙理工大学 | A kind of material thermal shock resistance examination test device of superhigh temperature controlled atmosphere |
| CN108344655A (en) * | 2018-01-30 | 2018-07-31 | 重庆大学 | Ceramic material spray-type thermal shock rig and method under a kind of closed environment |
| CN109946188A (en) * | 2019-03-25 | 2019-06-28 | 莱州市电子仪器有限公司 | Flaky material is detected by the device and method of metal melt flow thermal shock resistance properties |
| CN110261434A (en) * | 2019-07-29 | 2019-09-20 | 长沙理工大学 | A kind of quick thermal shock resistance examination test device |
| CN111678948A (en) * | 2020-06-02 | 2020-09-18 | 四川大学 | High-speed nondestructive detection method for surface defects of steel rail and implementation device thereof |
-
2017
- 2017-02-23 CN CN201720165107.0U patent/CN206440644U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108204994A (en) * | 2018-01-17 | 2018-06-26 | 长沙理工大学 | A kind of material thermal shock resistance examination test device of superhigh temperature controlled atmosphere |
| CN108344655A (en) * | 2018-01-30 | 2018-07-31 | 重庆大学 | Ceramic material spray-type thermal shock rig and method under a kind of closed environment |
| CN109946188A (en) * | 2019-03-25 | 2019-06-28 | 莱州市电子仪器有限公司 | Flaky material is detected by the device and method of metal melt flow thermal shock resistance properties |
| CN110261434A (en) * | 2019-07-29 | 2019-09-20 | 长沙理工大学 | A kind of quick thermal shock resistance examination test device |
| CN111678948A (en) * | 2020-06-02 | 2020-09-18 | 四川大学 | High-speed nondestructive detection method for surface defects of steel rail and implementation device thereof |
| CN111678948B (en) * | 2020-06-02 | 2022-07-19 | 四川大学 | High-speed nondestructive detection method for surface defects of steel rail and implementation device thereof |
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