Ultrasonic C scanning recognition method for internal defects of forge piece

A technology for internal defects and identification methods, which is applied in the analysis of solids using sonic/ultrasonic/infrasonic waves, which can solve problems such as inaccurate judgments, and achieve the effects of strong operability, accurate description of geometric shapes, and easy permanent preservation.

Inactive Publication Date: 2014-07-23
NANJING DEV ADVANCED MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a simple and convenient ultrasonic C-scan identification method for internal defects of forgings, aiming at the defect that ultrasonic C-scan is not accurate enough to judge the defect type of forgings in the prior art

Method used

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  • Ultrasonic C scanning recognition method for internal defects of forge piece
  • Ultrasonic C scanning recognition method for internal defects of forge piece
  • Ultrasonic C scanning recognition method for internal defects of forge piece

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] Sample and ultrasonic C-scan detector scanning parameters

[0057]

[0058] (1) Analysis of C-scan amplitude method

[0059] see Figure 4 As shown, it can be seen that the distribution of defects in the forging sample is relatively concentrated, and the relative positions of the defects at each point are relatively close. The distance between points is less than 13 mm, and they are mainly concentrated in the center of the forging sample. The width of the defect in both directions of the horizontal plane is not greater than the wavelength of 0.6mm (λ=0.6mm).

[0060] (2) C-scan chromatography analysis

[0061] see Figure 5 , 6 As shown in , 7 and 8, the ultrasonic C-scan tomographic image shows that the interlayer is displayed as a C-scan image with four spectral amplitudes. Each layer on the Z axis changes with a depth of 0.1mm, reflecting the gradual trend of defects in the sample.

[0062] This scan is displayed according to the tomography of each layer of ...

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Abstract

The invention discloses an ultrasonic C scanning recognition method for internal defects of a forge piece. The ultrasonic C scanning recognition method for the internal defects of the forge piece is high in operability, the geometrical shape description is accurate, the detection result is visual and reliable and is permanently preserved conveniently, and a favorable judgment basis is provided for final judgment of quantification, qualitative diagnosis and location of the defects. Ultrasound tomography of the forge piece can be acquired by utilizing an ultrasonic C scanning function, and the specific shape and accurate size of the defects are further obtained, so that an accurate prediction basis is provided for safety assessment, service life evaluation and finite element stress calculation of the forge pieces.

Description

technical field [0001] The invention relates to the field of ultrasonic C-scanning, in particular to an ultrasonic C-scanning identification method for internal defects of forgings. Background technique [0002] Since the world's first ultrasonic C-scan testing instrument came out in Paramount, California, USA in 1956, this testing technology has been rapidly promoted and applied to the testing of the internal quality of materials, and C-scan has realized the The automation of detection enables the detection results to be displayed in an intuitive image and can be recorded permanently. It is especially important that the ultrasonic C-scan has good penetration and has high sensitivity and reliability to defects. It allows us to obtain the maximum amount of information on internal defects and damages of components, such as the position distribution, shape and size of defects, etc. However, there is no identification method for specific defects in the prior art. [0003] The...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N29/06
Inventor 张利陈昌华
Owner NANJING DEV ADVANCED MFG
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