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Ultrasonic testing test block, its preparation method and application

A technology of ultrasonic testing and test blocks, which is applied in the direction of material analysis, measuring devices, and instruments using sound waves/ultrasonic waves/infrasonic waves, which can solve problems such as difficult to ensure positional accuracy, difficult to ensure dimensional accuracy, uneven shape, etc., and achieve improved accuracy , good calibration work, convenient size effect

Active Publication Date: 2022-06-24
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The existing test block preparation methods mainly have the following problems: (1) Since the diffusion welding defects exist inside the joint, that is, at the position of the diffusion welding interface, and the scale is micron, it is difficult to guarantee the position accuracy by traditional machining methods, It is more difficult to ensure dimensional accuracy, that is, it is difficult to realize the processing of internal micron-scale artificial reflectors
(2) Surface turning The method of processing threads on the surface to be welded can realize defect prefabrication at the diffusion welding interface, but it is difficult to guarantee the dimensional accuracy, and the shape is uneven, so it is difficult to form a test block

Method used

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  • Ultrasonic testing test block, its preparation method and application
  • Ultrasonic testing test block, its preparation method and application
  • Ultrasonic testing test block, its preparation method and application

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preparation example Construction

[0029] like figure 2 As shown, an embodiment of the present invention provides a method for preparing an ultrasonic testing test block, comprising the following steps:

[0030] S1, making cracks

[0031] The first base material and the second base material are placed on top of each other, and a cushion member is placed between the ends of the two contact surfaces of the first base material and the second base material, so as to form a joint from the first base material and the second base material. A gap of increasing width from the first end to the opposite second end; the first and second ends of the first and second substrates are then secured.

[0032] Specifically, superimposing the first substrate and the second substrate may be to place the first substrate above the second substrate to form a structure of two layers of substrates.

[0033] In some embodiments, both the first substrate and the second substrate are titanium alloy slabs, such as TC4. The specific size ...

Embodiment 1

[0054] The present embodiment provides a method for preparing an ultrasonic testing test block, which includes:

[0055] (1) Making the gap: first grind the surface of the 20×10mm plane of the two TC4 titanium alloy blocks (20×10×5mm) until there are no obvious scratches, and connect the grinding surfaces, such as figure 2 As shown in (a), the two TC4 blocks are butted, and the right end is filled with molybdenum wire at the end of the butt interface (the cylinder represents a molybdenum wire with a diameter of 180 μm), and then the bow clamp is fixed, and the two ends of the butt block plate (the part of the seam) are fixed. The narrowest end and the widest end) are retained by TIG welding to obtain a continuously changing gap.

[0056] (2) Preparation before diffusion welding: Clean the surface to be welded of the cover plate and the non-defective positions of the two sandwich block plates in (1), first grind the surface with sandpaper step by step, and use polishing liquid...

Embodiment 2

[0060] The present embodiment provides a method for preparing an ultrasonic testing test block, which includes:

[0061] (1) Making the gap: first grind the surface of the 20×10mm plane of the two TC4 titanium alloy blocks (20×10×5mm) until there are no obvious scratches, and connect the grinding surfaces, such as figure 2 As shown in the middle (a), the two TC4 blocks are butted, and the right end is filled with molybdenum wire at the end of the butt interface (the cylinder represents a molybdenum wire with a diameter of 100 μm), and then the bow clamp is fixed, and the two ends of the butt block plate (the part of the seam) is fixed. The narrowest end and the widest end) are retained by TIG welding to obtain a continuously changing gap.

[0062] (2) Preparation before diffusion welding: Clean the surface to be welded of the cover plate and the non-defective positions of the two sandwich block plates in (1), first grind the surface with sandpaper step by step, and use polish...

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Abstract

The invention provides an ultrasonic detection test block, its preparation method and application, and relates to the technical field of ultrasonic detection. The preparation method of the ultrasonic testing test block includes: placing a pad at one end between the stacked first base material and the second base material, so as to form a A gap where the width of the two ends gradually increases; fix the first end and the second end of the first base material and the second base material respectively, and then carry out diffusion welding. The inside of the test block formed by the preparation method in the embodiment of the present invention has gap defects with continuous width and gradual change, and the size is easy to adjust, and can reach the micron level, which significantly improves the accuracy of the prepared test block, can be used in ultrasonic testing, and can be more accurate. Carry out the calibration work before the test well.

Description

technical field [0001] The invention relates to the technical field of ultrasonic testing, in particular to an ultrasonic testing test block, a preparation method and application thereof. Background technique [0002] In order to ensure the accuracy, repeatability and comparability of test results in ultrasonic testing, the testing system must be calibrated with a sample with known fixed characteristics. Or a sample that simulates a defect, usually called a test block. The test blocks for ultrasonic testing are usually divided into standard test blocks, comparison test blocks and simulation test blocks. The artificial reflector in the test block shall be selected according to its purpose and shall be as close as possible to the characteristics of the defect to be detected. [0003] Usually, the required shape and size are processed inside or on the surface of the material by mechanical processing. Commonly used artificial reflectors mainly include long transverse holes, sh...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N29/30
CPCG01N29/30
Inventor 尹小康张昊熊江涛李京龙宋慧
Owner NORTHWESTERN POLYTECHNICAL UNIV
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