CN105334103A - Test sample clamp device of thermal barrier coating gradient thermal shock test - Google Patents
Test sample clamp device of thermal barrier coating gradient thermal shock test Download PDFInfo
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- CN105334103A CN105334103A CN201510831034.XA CN201510831034A CN105334103A CN 105334103 A CN105334103 A CN 105334103A CN 201510831034 A CN201510831034 A CN 201510831034A CN 105334103 A CN105334103 A CN 105334103A
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Abstract
The invention provides a test sample clamp device of a thermal barrier coating gradient thermal shock test. The test sample clamp device comprises a bottom round steel plate, a middle round ring and a top round ring which are overlapped in sequence and have the same outer diameter; before the test, the bottom round steel plate is arranged at the bottom and the middle round ring is arranged on the bottom round steel plate; then a test sample is put into a trapezoid grasping claw of the middle round ring; finally, the top round ring is arranged on the middle round ring; the three parts are adjusted until round holes in the three parts are aligned, are connected through a bolt and are fastened by a nut, so that the test sample is assembled. The test sample clamp device has the characteristics that the clamp has a simple structure and is convenient to mount, and the efficiency is improved; a surface stress state of the sample in a thermal shock test process is not influenced by the clamp, and the surface state can be really simulated when a workpiece covered with a thermal barrier coating works; conditions that the surface of the test sample is heated and the back face of the test sample is cooled can be met, and a real service condition of the thermal barrier coating is simulated.
Description
Technical field
The invention belongs to thermal barrier coating service environment simulator, be specifically related to a kind of thermal barrier coating gradient thermal shock test specimen holder device.
Background technology
Along with the development of Aeronautics and Astronautics and civilian technology, the serviceability temperature of hot-end component requires more and more higher, the extreme condition of reached a high temperature alloy and monocrystal material.For the heating part of gas turbine as nozzle, blade, firing chamber, they are in the rugged surroundings such as high-temperature oxydation and high temperature gas flow erosion, and bearing temperature, up to 1100 DEG C, has exceeded the ultimate temperature (1075 DEG C) that high temperature nickel alloy uses.The prepared thermal barrier coating that the resistant to elevated temperatures advantages of the high strength of metal, high tenacity and pottery got up can solve the problem, it can play heat insulation, anti-oxidant, etch-proof effect, on the hot junction materials such as steam turbine, diesel-driven generator, jet engine, obtain certain application, and extend the serviceable life of hot-end component.Ceramic topcoats, between metal adhesion layer and metallic matrix, there is thermal expansivity mismatch problem, hot growth stress, transformation stress etc. that metal adhesion layer thermal growth oxide causes are all cause thermal barrier coating surface layer ceramic layer to peel off, thus lose heat insulation and oxidation resistant effect.
Heat-barrier coating heat-shock resisting performance test is the important means in evaluation test thermal barrier coating service life-span.Traditional thermal shock test and isothermal thermal shock test, adopt thermal barrier coating sample directly put into heating furnace be heated to sample arrive preset temperature after take out and put into thermal shock medium (water or pressurized air) and cool fast, observe the dropping situations of coating afterwards, measure its thermal shock residual strength etc. and evaluate thermal shock performance of coatings.But thermal barrier coating actual military service operating mode is more complicated, heating process occurs in thermal barrier coating ceramic topcoats, and cooling procedure then occurs in Metal Substrate dignity.Therefore, above-mentioned isothermal thermal shock test, due to the heating of sample entirety, does not have formation temperature gradient between coating and matrix, and variant between thermal barrier coating actual military service operating mode.Patent CN1818612A, CN101644650A report gradient thermal shock test rigs, and with Isothermal Hot seismic phase ratio, this kind of gradient thermal shock test rigs ensure that thermal barrier coating sample interior exists thermograde, more realistic military service operating mode.But the specific descriptions had no in said apparatus test specimen fixture.The stress state of sample clamping mode to specimen surface has an impact.In gradient thermal shock test process, sample clamping point place applies stress to sample surfaces, thus stress state when causing sample surfaces stress state to be different from Free Surface state.The change of sample surfaces stress state certainly will affect the extended mode of crackle in thermal shock process, thus brings impact to the accuracy of thermal barrier coating life prediction.
To sum up, for ensureing that the stress state of specimen surface in gradient thermal shock process meets Free Surface state, a kind of sample clamp device of gradient thermal shock test is needed.
Summary of the invention
For solving the problem, the object of the present invention is to provide a kind of thermal barrier coating gradient thermal shock test specimen holder device, this grip device does not affect sample surfaces stress state in thermal shock test process, the surface state during barrier coating workpiece work of energy real simulation cover heating.
In order to achieve the above object, the present invention adopts following technical scheme:
A kind of thermal barrier coating gradient thermal shock test specimen holder device, comprises bottom circular steel plate 1, middle annulus 2 and top annulus 3 that the external diameter that superposes use is successively identical; Described bottom circular steel plate 1 center position has central through hole 1-1 centered by the center of circle, and central through hole 1-1 diameter is slightly smaller than circular gradient thermal shock specimen finish, and bottom circular steel plate 1 position that keeps to the side has multiple bottom margin through hole 1-2 fixing for bolt; Described middle annulus 2 thickness is identical with circular gradient thermal shock sample thickness, the position that keeps to the side has multiple middle edge through hole 2-1 consistent with bottom margin through hole 1-2 position that be that fix for bolt, middle annulus 2 is respectively arranged with at middle edge through hole 2-1 place middlely trapezoidally holds pawl 2-2, and the middle trapezoidal minor face holding pawl 2-2 is circular arc; Described top annulus 3 position that keeps to the side has multiple top through hole 3-1 consistent with bottom margin through hole 1-2 position that be that fix for bolt, top annulus 3 is respectively arranged with at top through hole 3-1 place that top is trapezoidal holds pawl 3-2, and the trapezoidal height holding pawl 3-2 in top is greater than the middle trapezoidal height holding pawl 2-2.
Described bottom circular steel plate 1, middle annulus 2 and top annulus 3 are fixed by screw bolt passes bottom margin through hole 1-2, middle edge through hole 2-1 and top through hole 3-1.
The quantity of described bottom margin through hole 1-2, middle edge through hole 2-1 and top through hole 3-1 is three, symmetrical on the circle of its center of circle respectively centered by the center of circle of bottom circular steel plate 1, middle annulus 2 and top annulus 3.
The trapezoidal minor face of pawl 3-2 of holding in described top is for semicircle.
Tool of the present invention has the following advantages:
1) clamp structure is simple, easy for installation, raises the efficiency.
2) fixture does not affect sample surfaces stress state in thermal shock test process, the surface state during barrier coating workpiece work of energy real simulation cover heating.
3) can meet specimen surface heating, the condition of back side cooling, simulation thermal barrier coating is truly on active service situation.
Accompanying drawing explanation
Fig. 1 is thermal barrier coating gradient thermal shock test specimen holder device explosion figure of the present invention.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
As shown in Figure 1, the installation of fixture of the present invention and use procedure are: bottom circular steel plate 1 is placed in bottom, middle annulus 2 is placed on bottom circular steel plate 1, bottom margin through hole 1-2 on bottom circular the steel plate 1 and middle edge through hole 2-1 on middle annulus 2 aligns, putting into circular gradient thermal shock sample holds between pawl 2-2 to the centre on middle annulus 2 is trapezoidal, face up, the trapezoidal pawl 2-2 arc-shaped edges of holding in circular gradient thermal shock sample edge and centre is close to.By placed on it for top annulus 3 after sample has loaded, the top through hole 3-1 on top annulus 3 has alignd with the middle edge through hole 2-1 on middle annulus 2.Bottom circular steel plate 1, to be connected with bolt between middle annulus 2 with top annulus 3, fastening nuts.After sample has assembled, specimen surface except top is trapezoidal hold specimen surface edge shared by pawl 3-2 except other place all outside exposed.The sample back side is outside exposed by bottom margin through hole 1-2.During gradient thermal shock test, flame gun heats sample front, and sample back, by pressure-air cooling, realizes the distribution of sample internal temperature gradient.Meanwhile, due to the particular design of said sample fixture, stress state when specimen surface stress is Free Surface when ensure that thermal shock test, gradient thermal shock test is closer to the actual military service operating mode of coating.
Claims (4)
1. a thermal barrier coating gradient thermal shock test specimen holder device, is characterized in that: comprise bottom circular steel plate (1), middle annulus (2) and top annulus (3) that the external diameter that superposes use is successively identical; Described bottom circular steel plate (1) center position has central through hole (1-1) centered by the center of circle, central through hole (1-1) diameter is slightly smaller than circular gradient thermal shock specimen finish, and bottom circular steel plate (1) position that keeps to the side has multiple bottom margin through hole (1-2) fixing for bolt; Described middle annulus (2) thickness is identical with circular gradient thermal shock sample thickness, the position that keeps to the side has multiple with bottom margin through hole (1-2) position consistent middle edge through hole (2-1) fixing for bolt, middle annulus (2) is respectively arranged with at middle edge through hole (2-1) place middlely trapezoidally holds pawl (2-2), and the middle trapezoidal minor face holding pawl (2-2) is circular arc; The position that keeps to the side, described top annulus (3) has multiple with bottom margin through hole (1-2) position consistent top through hole (3-1) fixing for bolt, top annulus (3) is respectively arranged with at top through hole (3-1) place that top is trapezoidal holds pawl (3-2), and the trapezoidal height holding pawl (3-2) in top is greater than the middle trapezoidal height holding pawl (2-2).
2. thermal barrier coating gradient thermal shock test specimen holder device according to claim 1, is characterized in that: described bottom circular steel plate (1), middle annulus (2) and top annulus (3) are fixing by screw bolt passes bottom margin through hole (1-2), middle edge through hole (2-1) and top through hole (3-1).
3. thermal barrier coating gradient thermal shock test specimen holder device according to claim 1, to it is characterized in that: the quantity of described bottom margin through hole (1-2), middle edge through hole (2-1) and top through hole (3-1) is three, symmetrical on the circle of its center of circle respectively centered by the center of circle of bottom circular steel plate (1), middle annulus (2) and top annulus (3).
4. thermal barrier coating gradient thermal shock test specimen holder device according to claim 1, is characterized in that: the trapezoidal minor face of pawl (3-2) of holding in described top is for semicircle.
Priority Applications (1)
| 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 CN105334103B (en) | 2017-11-24 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106840868A (en) * | 2017-04-14 | 2017-06-13 | 西安热工研究院有限公司 | A kind of specimen holder for the experiment of thermal barrier coating high temperature erosion |
| 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 |
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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 |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106840868A (en) * | 2017-04-14 | 2017-06-13 | 西安热工研究院有限公司 | A kind of specimen holder for the experiment of thermal barrier coating high temperature erosion |
| 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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| CN105334103B (en) | 2017-11-24 |
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