Thermal protection coating surface performance test method

A technology for surface performance and thermal protection, applied in measuring devices, thermal analysis of materials, instruments, etc., can solve the problems of short test period, long test period, and high cost, so as to save experiment cost, shorten test period, and improve thermal stress Effect

Inactive Publication Date: 2015-06-17
INST OF MECHANICS - CHINESE ACAD OF SCI
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the shortcomings of the above-mentioned heat protection coating surface performance detection technology, such as long test period, complicated steps, and high

Method used

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  • Thermal protection coating surface performance test method
  • Thermal protection coating surface performance test method

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Experimental program
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Embodiment 1

[0037] Such as figure 1 As shown, the present embodiment adopts the thermal protective coating surface performance testing device mainly by laser and laser head 1, beam conversion system 2, image acquisition system 3, infrared thermometer 4, laser beam 5, thermal protective coating to be tested Sample 6, thermocouple 7, fixing and sealing device 8, cooling base 9, cooling medium inlet 10, cooling medium outlet 11. specific:

[0038] Laser 1 is a high-power solid-state continuous laser HLD1001.5 from Trumpf, Germany, and an optical fiber is used to connect the laser to the laser head, and the diameter of the optical fiber is 0.15 mm. Beam transformation system 2 transforms the laser beam distribution into a dot matrix distribution laser with 3 circular spots, distributed in a row, each spot diameter is 10mm, and the position of the transformed spot acting on the surface of the thermal protective coating is as follows: figure 2 shown. The image acquisition system 3 adopts th...

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Abstract

The invention provides a thermal protection coating surface performance test method including following steps: a), processing a thermal protective coating sample, installing the sample on a cooling base, wherein the sample lower surface and the cooling base form a closed cooling medium channel; b), using a laser beam with variable intensity to heat the sample thermal protective coating surface, then cooling the sample; repeatedly performing the step b) for specified cycle times; measuring temperature values of every measuring point required in the experimental process; observing the change of the thermal protective coating surface state in the experimental process; and c) evaluating the sample thermal fatigue performance and heat insulation performance. The thermal protection coating surface performance test method improves the thermal stress, significantly accelerates the surface thermal fatigue, shortens the testing period, and saves the experimental cost. Movement is not needed in the hot and cold cycle, so that the test system is relatively simple. Two surface properties of thermal protective coating thermal fatigue performance and heat insulation performance can be simultaneously tested.

Description

technical field [0001] The invention relates to the technical field of surface performance testing, in particular to a method for testing thermal fatigue performance and heat insulation performance of a coating surface by using a laser as a heat source. Background technique [0002] Using thermal spraying, surfacing, cladding and other surface technologies to prepare thermal protective coatings on the surface of heated parts is an effective means to improve the reliable service life of parts. The use of high-performance coatings can not only improve the thermal fatigue performance of the surface, but also reduce the working temperature of the substrate, and play a role in heat resistance and heat insulation. It is suitable for turbine blades of aerospace engines, cylinder heads, pistons, and inlets of automotive engines. Exhaust pipes, hot forging dies, rolls and other parts that are subjected to high temperature and high pressure load conditions. [0003] Surface thermal f...

Claims

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Application Information

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IPC IPC(8): G01N25/00
Inventor 虞钢刘昊郑彩云何秀丽李少霞宁伟健
Owner INST OF MECHANICS - CHINESE ACAD OF SCI
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