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Thermal barrier coating thermal shock simulation testing device and testing method

A simulation test, thermal barrier coating technology, applied in the direction of measuring device, testing wear resistance, testing material strength by applying repetitive force/pulsation force, etc., can solve coating failure, coating peeling off, real thermal vibration of coating Misjudgment of life and other problems, to reduce the possibility, improve accuracy, and improve uniformity

Inactive Publication Date: 2016-08-03
HUANENG POWER INTERNATIONAL +1
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Problems solved by technology

During the thermal shock process of this small sample, the boundary of the sample has a great influence on the test results, causing the coating to fall off from the boundary of the sample and expand to the center of the sample, which is inconsistent with the failure of the real coating during service. layer premature failure
Misjudgment of the true thermal shock life of the coating

Method used

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  • Thermal barrier coating thermal shock simulation testing device and testing method

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Embodiment Construction

[0018] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0019] Such as figure 1 and figure 2 As shown, the installation and use process of the device of the present invention is as follows: firstly, the gas circuit and the cooling water pipeline are connected with the combustion chamber 2, and a heat-resistant steel nozzle 3 with a throat diameter of 15 mm, an expansion angle of 10° and a length of 25 mm is used. Insert it into the combustion chamber 2, and install the igniter 4 on the front end of the nozzle 3 through threaded connection, and install the above-mentioned connected combustion system on the burner support 15. Connect the 100mm×100mm plate-shaped nickel-based alloy substrate 6 with the cooling air bag 17 of the same size to form a hollow structure, and then spray thermal barrier coating on the plate-shaped nickel-based alloy substrate 6, after the spraying is completed, it ...

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Abstract

A thermal vibration simulation test device and test method for thermal barrier coatings. The nozzle in the combustion system of the device adopts a contracted and expanded nozzle structure, and the sample adopts a large-sized plate-shaped nickel-based alloy substrate connected to a gas bag of the same size. , forming a hollow cooling structure similar to the blades of a gas turbine. After spraying the coating, connect it to the hollow air supply pipe, insert it into the mounting hole of the turntable and fix it, and the servo motor control unit controls the rotation angle of the sample and the heating and holding time , after turning on the power and cooling water, turn on the air source, then ignite and start thermal vibration. After the heating and holding time is up, rotate to the cooling position to be cooled by the cold air ejected from the cooling outlet of the coating sample, and the sample completes a thermal vibration. , and recorded in the control and display; using the device of the present invention to simulate the thermal shock and high-temperature flame erosion process of the thermal barrier coating in a high-temperature, high-speed flame environment with approximate real working conditions, the accuracy of the test results can be improved, authenticity.

Description

technical field [0001] The invention belongs to the technical field of surface engineering, and in particular relates to a thermal vibration simulation test device and a test method for a thermal barrier coating. Background technique [0002] Gas turbine hot passage components operate under harsh conditions, with a maximum temperature close to 1,500 degrees Celsius. Thermal barrier coating is one of the protection methods for gas turbine hot channel components. It is applied to the surface of the hot channel components to protect the metal body and prevent the metal body from failure such as oxidation resistance, yielding, and creep at high temperatures. The gas turbine has the characteristics of frequent start-up, and the thermal barrier coating fails due to the thermal shock and erosion of the high-temperature and high-speed flame flow during the start-up and stop of the gas turbine. In the thermal vibration life evaluation process of thermal barrier coatings, there is no...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/56G01N3/36G01N3/60
CPCG01N3/567G01N3/36G01N3/60
Inventor 李太江李巍李勇杨二娟刘刚李聚涛
Owner HUANENG POWER INTERNATIONAL
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