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Nondestructive testing method for thickness of coating layer of insensitive propellant

A non-destructive testing and cladding technology, applied in the direction of measuring devices, using wave/particle radiation, instruments, etc., to achieve the effect of measuring work efficiency

Pending Publication Date: 2021-08-17
XIAN MODERN CHEM RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is impossible to complete the cross-section and longitudinal section in one measurement, and both require pre-treatment of the sample

Method used

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  • Nondestructive testing method for thickness of coating layer of insensitive propellant
  • Nondestructive testing method for thickness of coating layer of insensitive propellant
  • Nondestructive testing method for thickness of coating layer of insensitive propellant

Examples

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Effect test

Embodiment 1

[0074] This embodiment provides a non-destructive testing method for the thickness of the coating layer of four-hole insensitivity coated propellant, the method includes the following steps:

[0075] Sample preparation: Take a four-hole insensitive coated propellant, fix it on the foam block with double-sided adhesive tape, and then place the foam block in the center of the sample stage in the microfocus X-ray computer tomography scanner;

[0076] Sample scanning: The micro-focus CT model used in this example is FF20 produced by Yikeshilang Company, using the micro-focus mode, setting the X-ray tube voltage to 70kV, the X-ray target power to 4.2W, and the ratio of FDD to FOD to 25 , the frame number of the detector is 1.0Hz, the rotation angle is 360°, and 720 samples of data are sampled, and then the surface vibration detector is used to receive the X-ray signal to obtain the two-dimensional DR data of the four-hole insensitivity-coated propellant;

[0077] Data reconstructio...

Embodiment 2

[0084] This embodiment provides a non-destructive testing method for the thickness of the coating layer of a seven-hole insensitive coated propellant, which includes the following steps:

[0085] Sample preparation: Take a seven-hole insensitive coated propellant, fix it on the foam block with double-sided adhesive tape, and then place the foam block in the center of the sample stage in the microfocus X-ray computer tomography scanner;

[0086] Sample scanning: The model of micro-focus CT used in this example is FF20 produced by Yikeshilang Company, using micro-focus mode, setting the X-ray tube voltage to 80kV, the X-ray target power to 4.8W, and the ratio of FDD to FOD to 10 , the frame number of the detector is 1.0Hz, the rotation angle is 360°, and 720 samples of data are sampled, and then the surface vibration detector is used to receive the X-ray signal to obtain the two-dimensional DR data of the seven-hole insensitivity coated propellant;

[0087] Data reconstruction a...

Embodiment 3

[0095] This embodiment provides a non-destructive testing method for the thickness of the coating layer of the 19-hole insensitivity coated propellant, which includes the following steps:

[0096] Sample preparation: Take a 19-hole insensitive coated propellant, fix it on the foam block with double-sided adhesive tape, and then place the foam block in the center of the sample stage in the micro-focus X-ray computer tomography scanner;

[0097] Sample scanning: The micro-focus CT model used in this example is FF20 produced by Yikeshilang Company, using the micro-focus mode, setting the X-ray tube voltage to 90kV, the X-ray target power to 6.3W, and the ratio of FDD to FOD to 5 , the frame rate of the detector is 1.5Hz, the rotation angle is 360°, and the sampling data is 720 pieces, and then the surface vibration detector is used to receive the X-ray signal to obtain the two-dimensional DR data of the 19-hole insensitivity-coated propellant;

[0098] Data reconstruction and ana...

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Abstract

The invention relates to a nondestructive testing method for the thickness of a coating layer of an insensitive propellant. The nondestructive testing method comprises the following steps: 1, obtaining two-dimensional DR data of an insensitive propellant grain; 2, obtaining a CT section drawing of the grain; performing surface treatment and contrast adjustment on the obtained CT section image; 3, selecting one or two CT section diagrams from all the CT section diagrams in the X direction and the Y direction, and selecting a plurality of sampling points from the selected CT section diagrams; 4, selecting two section diagrams in the diameter direction from all CT section diagrams in the XZ direction or the YZ direction, and arranging a plurality of sampling points; and 5, measuring the thickness of the coating layer on each sampling point of the layout, and calculating to obtain the average value and the distribution range of the thickness of the coating layer of the insensitive propellant powder. According to the method, the technical problem that a nondestructive detection method for the thickness of the coating layer of the insensitive propellant is lacked is solved, so that a basis is provided for research on correlation of coating process parameters, the thickness of the coating layer and combustion gradual increase of the insensitive propellant.

Description

technical field [0001] The invention belongs to the field of physical and chemical analysis and detection of insensitive propellants, and in particular relates to a method for detecting the coating layer thickness of insensitive propellants. Background technique [0002] The propellant charge is used as the launch energy of the barrel weapon, and the particle structure of the propellant charge is an important factor affecting the charge and combustion performance of the propellant charge. Surface insensitivity coating of propellant can improve the combustion progression and safety of propellant charge. [0003] Insensitive coated propellants (such as four-hole, seven-hole and nineteen-hole insensitive propellants) have been applied to the model. The thickness of the cladding layer is an important parameter for the initial combustion intensity and gradual increase of combustion, and plays a role in regulating the combustion of high packing density. However, for the characte...

Claims

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Application Information

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IPC IPC(8): G01B15/02
CPCG01B15/02Y02T90/00
Inventor 徐敏朱勇赵娟王锋宁艳利周文静刘可
Owner XIAN MODERN CHEM RES INST
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