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Measuring method for mechanical properties of electron gun thermal subassembly

A test method and electron gun technology, applied in the direction of applying stable tension/pressure to test the strength of materials, etc., can solve problems such as research failures, and achieve the effect of solving testing problems

Active Publication Date: 2019-05-03
FIFTH ELECTRONICS RES INST OF MINIST OF IND & INFORMATION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to statistics, the fracture of the hot wire and the thermal sub-assembly accounts for more than 16% of the failure of the electron gun, which is one of the main damage modes. Therefore, in order to study the reliability of the electron gun, the thermal coupling fracture characteristics of the thermal sub-assembly and the thermal sub-assembly are carried out. Analysis is very necessary, and the research on this problem at home and abroad is still in the preliminary stage, only found this problem from practical application, there is no technical reference and related reports in this area, and the research on its system has not yet started

Method used

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  • Measuring method for mechanical properties of electron gun thermal subassembly
  • Measuring method for mechanical properties of electron gun thermal subassembly
  • Measuring method for mechanical properties of electron gun thermal subassembly

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Embodiment

[0047] This embodiment is a method for testing the mechanical properties of an electron gun thermal subassembly. The thermal subassembly to be tested is a thermal subassembly. The test flow chart is shown in figure 1 ,Specific steps are as follows:

[0048] (1) Selected experimental testing equipment: SEM-SERVO produced by Shimadzu Corporation of Japan was selected for experimental testing. This equipment can provide the vacuum and high temperature environment required for the electron gun thermal subassembly to work, and can be observed in situ by SEM;

[0049] (2) Mark the original gauge length L of the sample 0 : Use a marking machine to mark the original length of the gauge length section with a thin circumferential line on the hot plate as the original gauge length L 0 ;

[0050] (3) For the original cross-sectional area S of the sample 0 Determination: Since the diameter of the thermon is very small, put it under the SEM electron microscope and measure it with PS soft...

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Abstract

The invention relates to a method for testing mechanical properties of an electronic gun heater assembly, comprising the following steps: (1), taking at least two heater assemblies under detection; (2), marking an original scale distance on a heater of each heater assembly under detection, and determining original scale distances L0 and S0; (3), testing yield strength Sigma0.2 and tensile strength Sigmab of the heater assemblies under detection in an actual vacuum environment at different temperatures; (4), establishing a change-with-temperature linear relationship of the yield strength Sigma0.2 and tensile strength Sigmab of the heater assemblies under detection by linear fitting; (5), according to the linear relationship, calculating to obtain the yield strength Sigma0.2 and tensile strength Sigmab of the heater assemblies under detection at the actual operation temperatures. The method enables chemical tensile performance parameters of a heater or a combination of a heater with a platinum sheet and / or a cathode head in a vacuum high-temperature operating environment to be accurately measured, and the testing problem of engineering needs is solved.

Description

technical field [0001] The invention relates to the field of electron gun performance testing, in particular to a method for testing the mechanical properties of an electron gun thermal subassembly. Background technique [0002] Electron gun is an important functional device in electronic equipment such as modern radar, electronic countermeasures, relay communication, satellite communication, live TV satellite, navigation, remote sensing, remote control, and telemetry. As the core component of the electron gun, the heater assembly is mainly composed of three parts: the heater (tungsten-rhenium wire), the platinum sheet and the cathode head. [0003] When the electron gun is working normally, the temperature of the thermal subassembly inside is very high. The temperature of the cathode reaches about 1000°C, and the working temperature of the thermal subassembly reaches more than 1200°C. During its use, it is usually accompanied by external environmental stress such as vibrati...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N3/18
CPCG01N3/18
Inventor 苏伟宋芳芳朱军华恩云飞刘人怀
Owner FIFTH ELECTRONICS RES INST OF MINIST OF IND & INFORMATION TECH
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