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Ultrasonic detection test block as well as preparation method and application thereof

A technology for ultrasonic testing and test blocks, which is applied in the direction of material analysis, measuring devices, and instruments using sonic/ultrasonic/infrasonic waves. It can solve the problems of uneven shape, difficulty in ensuring position accuracy, and difficulty in ensuring dimensional accuracy. , Improve the accuracy, and improve the effect of calibration work

Active Publication Date: 2021-06-01
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 detection test block as well as preparation method and application thereof
  • Ultrasonic detection test block as well as preparation method and application thereof
  • Ultrasonic detection test block as well as preparation method and application thereof

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preparation example Construction

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

[0030] S1. Make the gap

[0031] The first base material and the second base material are superimposed, and a pad is placed between the ends of the two contact surfaces of the first base material and the second base material to form a gap between the first base material and the second base material. A gap whose width gradually increases from the first end to the opposite second end; then fix the first end and the second end of the first base material and the second base material.

[0032] Specifically, the stacking of the first substrate and the second substrate may be placing the first substrate on top of the second substrate to form a two-layer substrate structure.

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

Embodiment 1

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

[0055] (1) Making cracks: First, polish the 20×10mm plane surfaces of two TC4 titanium alloy plates (20×10×5mm) until there are no obvious scratches, and then connect the polished surfaces, such as figure 2 As shown in (a), two TC4 blocks are butted, and the right end is padded with molybdenum wire at the end of the butt joint interface (the cylinder represents the molybdenum wire with a diameter of 180 μm), and then the bow clamp is fixed, and the two ends of the butt plate (the gap between the joints) Both the narrowest end and the widest end) are TIG welded to retain the gap to obtain a continuously changing gap.

[0056] (2) Preparation before diffusion welding: clean the surface to be welded on the surface of the cover plate and the surface to be welded at the non-defect position of the two sandwich plates in (1). First, sand the surface step by step with san...

Embodiment 2

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

[0061] (1) Making cracks: First, polish the 20×10mm plane surfaces of two TC4 titanium alloy plates (20×10×5mm) until there are no obvious scratches, and then connect the polished surfaces, such as figure 2 As shown in (a), two TC4 blocks are butted, and the right end is padded with molybdenum wire at the end of the butt joint interface (the cylinder represents the molybdenum wire with a diameter of 100 μm), and then the bow clamp is fixed, and the two ends of the butt plate (the gap between the two ends) Both the narrowest end and the widest end) are TIG welded to retain the gap to obtain a continuously changing gap.

[0062] (2) Preparation before diffusion welding: clean the surface to be welded on the surface of the cover plate and the surface to be welded at the non-defect position of the two sandwich plates in (1). First, sand the surface step by step with s...

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Abstract

The invention provides an ultrasonic detection test block as well as a preparation method and application thereof, and relates to the technical field of ultrasonic detection. The preparation method of the ultrasonic detection test block comprises the following steps: placing a cushion piece at one end between a first base material and a second base material which are stacked, so as to form a crack of which the width is gradually increased from the first ends of the first base material and the second base material to the opposite second ends; fixing the first ends and the second ends of the first base material and the second base material respectively, and then carrying out diffusion welding. The interior of the test block formed by the preparation method provided by the embodiment of the invention has a crack defect with continuous gradually-changed width, the size is convenient to adjust, the test block can reach a micron level, the precision of the prepared test block is remarkably improved, and the test block can be used in ultrasonic detection and can better perform calibration work before testing.

Description

technical field [0001] The invention relates to the technical field of ultrasonic detection, in particular to an ultrasonic detection test block, its preparation method and application. Background technique [0002] In order to ensure the accuracy, repeatability and comparability of the test results in ultrasonic testing, it is necessary to use a sample with known fixed characteristics to calibrate the testing system. Or a sample that simulates a defect, usually called a test block. 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 is selected according to its purpose and should be as close as possible to the defect characteristics to be detected. [0003] Usually, the required shape and size are machined inside or on the surface of the material by machining. The commonly used artificial reflectors mainly include long horizontal holes, short horizon...

Claims

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Application Information

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Patent Type & Authority Applications(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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