CN105334103B - A kind of thermal barrier coating gradient thermal shock test specimen holder device - Google Patents
A kind of thermal barrier coating gradient thermal shock test specimen holder device Download PDFInfo
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- CN105334103B CN105334103B CN201510831034.XA CN201510831034A CN105334103B CN 105334103 B CN105334103 B CN 105334103B CN 201510831034 A CN201510831034 A CN 201510831034A CN 105334103 B CN105334103 B CN 105334103B
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Abstract
A kind of thermal barrier coating gradient thermal shock test specimen holder device, including it is sequentially overlapped external diameter identical bottom circular steel plate, middle circle and the top annulus used；Before experiment, bottom circular steel plate is first placed in bottom, middle circle is placed on it, it is finally that top annulus is placed on it between sample is put into the trapezoidal gripping claw of middle circle therewith, three parts of adjustment to circular hole alignment thereon, it is bolted, nut fastening, sample assembling is completed；Feature of the present invention is that clamp structure is simple, easy for installation, improves efficiency；Fixture does not influence sample surfaces stress state during thermal shock test, surface state when energy real simulation covering thermal barrier coating workpiece works；It disclosure satisfy that specimen surface heats, the condition of back side cooling, simulation thermal barrier coating is truly on active service situation.
Description
Technical field
The invention belongs to thermal barrier coating service environment simulator, and in particular to a kind of thermal barrier coating gradient thermal shock test examination
Sample grip device.
Background technology
With the development of Aeronautics and Astronautics and civilian technology, the temperature in use of hot-end component requires more and more higher, has reached high
The extreme condition of temperature alloy and monocrystal material.By taking the heating part of gas turbine such as nozzle, blade, combustion chamber as an example, at them
In the adverse circumstances such as high-temperature oxydation and high temperature gas flow erosion, bearing temperature is up to 1100 DEG C, and having exceeded high temperature nickel alloy makes
Limiting temperature (1075 DEG C).The high intensity of metal, high tenacity are combined with the resistant to elevated temperatures advantage of ceramics prepared
The thermal barrier coating gone out can solve the above problems, and it can play heat-insulated, anti-oxidant, etch-proof effect, be sent out in steam turbine, diesel oil
Certain application is obtained on the material of the hot junction such as motor, jet engine, and extends the service life of hot-end component.Ceramic plane
Thermal coefficient of expansion mismatch problem be present between layer, metal adhesion layer and metallic matrix, metal adhesion layer thermal growth oxide causes
Thermally grown stress, transformation stress etc. be all to cause thermal barrier coating surface layer ceramic layer to peel off, it is heat-insulated and oxidation resistant so as to lose
Effect.
Heat-barrier coating heat-shock resisting performance experiment is the important means in evaluation test thermal barrier coating service life-span.Traditional thermal shock
Experiment is isothermal thermal shock test, using thermal barrier coating sample is directly placed into heating furnace be heated to sample reach preset temperature
Take out to be put into thermal shock medium (water or compressed air) after degree and quickly cool down, observe the dropping situations of coating afterwards, measure it
Thermal shock residual strength etc. evaluates thermal shock performance of coatings.But the actual military service operating mode of thermal barrier coating is more complicated, heating process hair
Life is in thermal barrier coating ceramic topcoats, and cooling procedure then occurs in Metal Substrate dignity.Therefore, above-mentioned isothermal thermal shock test is due to right
Sample is integrally heated, and thermograde is not formed between coating and matrix, variant between the actual military service operating mode of thermal barrier coating.Patent
CN1818612A, CN101644650A report gradient thermal shock test rigs, with Isothermal Hot seismic phase ratio, this kind of gradient thermal shock test
Device ensure that thermal barrier coating sample interior has thermograde, more conform to actual military service operating mode.But had no in said apparatus
To the specific descriptions of test specimen fixture.Sample clamping mode has an impact to the stress state of specimen surface.In gradient thermal shock
During experiment, stress is applied to sample surfaces at sample clamping point, so as to cause sample surfaces stress state to be different from freely
Stress state during surface state.The change of sample surfaces stress state certainly will influence the extended mode of crackle during thermal shock,
So as to bring influence to the accuracy of thermal barrier coating life prediction.
To sum up, the stress state for specimen surface during guarantee gradient thermal shock meets Free Surface state, it is necessary to one kind
The sample clamp device of gradient thermal shock test.
The content of the invention
To solve the above problems, it is an object of the invention to provide a kind of thermal barrier coating gradient thermal shock test specimen holder dress
Put, the grip device does not influence sample surfaces stress state during thermal shock test, can real simulation covering thermal barrier coating workpiece
Surface state during work.
In order to achieve the above object, the present invention adopts the following technical scheme that：
A kind of thermal barrier coating gradient thermal shock test specimen holder device, including it is sequentially overlapped the external diameter identical bottom used
Circular steel plate 1, middle circle 2 and top annulus 3；During the center position of bottom circular steel plate 1 is provided with centered on the center of circle
Heart through hole 1-1, central through hole 1-1 diameters are slightly smaller than circular gradient thermal shock specimen finish, and bottom circular steel plate 1 is close to marginal position
It is provided with multiple bottom margin through hole 1-2 fixed for bolt；The thickness of middle circle 2 and circular gradient thermal shock sample thickness
It is identical, it is provided with multiple middle edges consistent with bottom margin through hole 1-2 positions fixed for bolt close to marginal position
Through hole 2-1, middle circle 2 are respectively arranged with middle trapezoidal gripping claw 2-2, middle trapezoidal gripping claw 2-2 at middle edge through hole 2-1
Short side be circular arc；The top annulus 3 is provided with multiple for bolt fixation and bottom margin through hole close to marginal position
The consistent top edge through hole 3-1 in 1-2 positions, it is trapezoidal that top annulus 3 is respectively arranged with top at the through hole 3-1 of top edge
Gripping claw 3-2, the trapezoidal gripping claw 3-2 in top height are more than middle trapezoidal gripping claw 2-2 height.
The bottom circular steel plate 1, middle circle 2 and top annulus 3 pass through screw bolt passes bottom margin through hole 1-
2nd, middle edge through hole 2-1 and top edge through hole 3-1 are fixed.
The bottom margin through hole 1-2, middle edge through hole 2-1 and top edge through hole 3-1 quantity are three, its
The center of circle is respectively on the circle centered on the center of circle of bottom circular steel plate 1, middle circle 2 and top annulus 3 and symmetrical.
The short side of the trapezoidal gripping claw 3-2 in top is semicircle.
The invention has the advantages that：
1) clamp structure is simple, easy for installation, improves efficiency.
2) fixture does not influence sample surfaces stress state during thermal shock test, can real simulation covering thermal barrier coating workpiece
Surface state during work.
3) it disclosure satisfy that specimen surface heats, the condition of back side cooling, simulation thermal barrier coating is truly on active service situation.
Brief description of the drawings
Fig. 1 is thermal barrier coating gradient thermal shock test specimen holder device explosion figure of the present invention.
Embodiment
The present invention is described in further detail with reference to the accompanying drawings and detailed description.
As shown in figure 1, the installation of present clip and using process being：Bottom circular steel plate 1 is placed in bottom, middle circle
2 are placed on bottom circular steel plate 1, the middle edge on bottom margin through hole 1-2 and middle circle 2 on bottom circular steel plate 1
Through hole 2-1 aligns, and is put between the trapezoidal gripping claw 2-2 in centre of the circular gradient thermal shock sample to middle circle 2, face-up,
It is close to middle trapezoidal gripping claw 2-2 arc-shaped edges at circular gradient thermal shock sample edge.Top annulus 3 is placed in after the completion of sample loading
Thereon, the top edge through hole 3-1 on top annulus 3 aligns with the middle edge through hole 2-1 on middle circle 2.Bottom circular
It is connected between steel plate 1, middle circle 2 and top annulus 3, nut fastening.After the completion of sample assembling, specimen surface removes top
Shared by trapezoidal gripping claw 3-2 outside specimen surface edge it is other place it is exposed outside.The sample back side is naked by bottom margin through hole 1-2
Expose outside.During gradient thermal shock test, flame gun is heated to sample front, and sample back is cooled down by compressed air, is realized
Sample internal temperature gradient is distributed.Simultaneously as the particular design of said sample fixture, specimen surface when ensure that thermal shock test
Stress state when stress is Free Surface, gradient thermal shock test is closer to the actual military service operating mode of coating.
Claims (2)
- A kind of 1. thermal barrier coating gradient thermal shock test specimen holder device, it is characterised in that：Including being sequentially overlapped the external diameter used Identical bottom circular steel plate (1), middle circle (2) and top annulus (3)；Bottom circular steel plate (1) center position Central through hole (1-1) is provided with centered on the center of circle, central through hole (1-1) diameter is slightly smaller than circular gradient thermal shock specimen finish, bottom Portion's circular steel plate (1) is provided with multiple bottom margin through holes (1-2) fixed for bolt close to marginal position；The middle circle (2) thickness is identical with circular gradient thermal shock sample thickness, and multiple fixed for bolt and bottom sides are provided with close to marginal position The consistent middle edge through hole (2-1) in edge through hole (1-2) position, middle circle (2) are distinguished at middle edge through hole (2-1) place Middle trapezoidal gripping claw (2-2) is provided with, the short side of middle trapezoidal gripping claw (2-2) is circular arc；The top annulus (3) is close to side Edge position is provided with multiple top edge through holes (3-1) consistent with bottom margin through hole (1-2) position fixed for bolt, Top annulus (3) is respectively arranged with the trapezoidal gripping claw (3-2) in top, the trapezoidal gripping claw in top (3-2) at top edge through hole (3-1) place Height be more than the height of middle trapezoidal gripping claw (2-2)；The bottom circular steel plate (1), middle circle (2) and top annulus (3) pass through screw bolt passes bottom margin through hole (1-2), middle edge through hole (2-1) and top edge through hole (3-1) are fixed；The quantity of the bottom margin through hole (1-2), middle edge through hole (2-1) and top edge through hole (3-1) is three, Its center of circle is respectively on the circle centered on the center of circle of bottom circular steel plate (1), middle circle (2) and top annulus (3) and symmetrical Distribution.
- 2. thermal barrier coating gradient thermal shock test specimen holder device according to claim 1, it is characterised in that：The top The short side of trapezoidal gripping claw (3-2) is semicircle.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510831034.XA CN105334103B (en) | 2015-11-25 | 2015-11-25 | A kind of thermal barrier coating gradient thermal shock test specimen holder device |
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| CN201510831034.XA CN105334103B (en) | 2015-11-25 | 2015-11-25 | A kind of thermal barrier coating gradient thermal shock test specimen holder device |
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| CN105334103B true CN105334103B (en) | 2017-11-24 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106840868B (en) * | 2017-04-14 | 2023-03-24 | 西安热工研究院有限公司 | Sample clamp for high-temperature erosion test of thermal barrier coating |
| CN107907406A (en) * | 2017-12-26 | 2018-04-13 | 郑州大学 | A kind of multilayer round platform delamination fixture based on electrochemical polish |
| CN113390927A (en) * | 2021-06-15 | 2021-09-14 | 广东省科学院工业分析检测中心 | Impedance spectrum test fixture for thermal barrier coating and test method thereof |
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| US6526813B1 (en) * | 2000-09-25 | 2003-03-04 | Leica Microsystems Inc. | Metallurgical sample magazine |
| CN1818612A (en) * | 2006-03-23 | 2006-08-16 | 上海交通大学 | Measuring device for heat-barrier coating heat-shock resisting performance |
| CN101644650A (en) * | 2008-08-06 | 2010-02-10 | 中国农业机械化科学研究院 | Device and method for testing thermal cycling performance of thermal barrel coating |
| CN103091189A (en) * | 2013-01-10 | 2013-05-08 | 湘潭大学 | Tester for simulating service environment of thermal barrier coating and detecting failure of thermal barrier coating in real time |
| CN104897714A (en) * | 2015-04-29 | 2015-09-09 | 东方电气集团东方汽轮机有限公司 | Gas turbine thermal barrier coating efficient-thermal cycle performance testing apparatus and testing method thereof |
| CN205192849U (en) * | 2015-11-25 | 2016-04-27 | 华能国际电力股份有限公司 | A sample fixture device for thermal shock test of thermal barrier coating gradient |
-
2015
- 2015-11-25 CN CN201510831034.XA patent/CN105334103B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6526813B1 (en) * | 2000-09-25 | 2003-03-04 | Leica Microsystems Inc. | Metallurgical sample magazine |
| CN1818612A (en) * | 2006-03-23 | 2006-08-16 | 上海交通大学 | Measuring device for heat-barrier coating heat-shock resisting performance |
| CN101644650A (en) * | 2008-08-06 | 2010-02-10 | 中国农业机械化科学研究院 | Device and method for testing thermal cycling performance of thermal barrel coating |
| CN103091189A (en) * | 2013-01-10 | 2013-05-08 | 湘潭大学 | Tester for simulating service environment of thermal barrier coating and detecting failure of thermal barrier coating in real time |
| CN104897714A (en) * | 2015-04-29 | 2015-09-09 | 东方电气集团东方汽轮机有限公司 | Gas turbine thermal barrier coating efficient-thermal cycle performance testing apparatus and testing method thereof |
| CN205192849U (en) * | 2015-11-25 | 2016-04-27 | 华能国际电力股份有限公司 | A sample fixture device for thermal shock test of thermal barrier coating gradient |
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