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Ultrasonic B+C+D+S scanning identification method of internal defect of steel ingot

A scanning method and a technology for internal defects, which are applied in the analysis of solids using sonic/ultrasonic/infrasonic waves, which can solve the problems of insufficient image and intuitive judgment, and achieve the effect of eliminating the universal forging process card, accurate description of map features, and comprehensive detection results.

Active Publication Date: 2015-07-22
NANJING DEV ADVANCED MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a simple and convenient ultrasonic B+C+D+S scanning identification method for internal defects of steel ingots in view of the shortcomings of the existing technology that the ultrasonic scanning is not enough to judge steel ingot defects.

Method used

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  • Ultrasonic B+C+D+S scanning identification method of internal defect of steel ingot
  • Ultrasonic B+C+D+S scanning identification method of internal defect of steel ingot
  • Ultrasonic B+C+D+S scanning identification method of internal defect of steel ingot

Examples

Experimental program
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Effect test

Embodiment 1

[0044] Example 1 The continuous casting ingot is detected. In the ultrasonic B+C+D+S scanning atlas, the B-scan image is a non-central intermittent strip, the C-scan image is a central intermittent strip, and the D-scan image is A spot in the center; the S-scan image shows a spot in the center. Defects are single point defects. see figure 2 shown.

Embodiment 2

[0045] Example 2 The die-casting ingot is detected, in the ultrasonic B+C+D+S scanning atlas, the B-scan image is a non-central intermittent strip, the C-scan image is a central intermittent strip, and the D-scan image is A spot in the center; the S-scan image shows a spot in the center. Defects are single point defects. see image 3 shown.

Embodiment 3

[0046] Example 3 Electroslag remelting ingots are detected, in the ultrasonic B+C+D+S scanning atlas, the B-scan image is a non-central intermittent strip, the C-scan image is a central intermittent strip, and the D-scan The image is a non-central spot; the S-scan image is a non-central spot. Defects are single point defects. see Figure 4 shown.

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Abstract

The invention discloses an ultrasonic B+C+D+S scanning identification method of an internal defect of steel ingots. The steel ingots are scanned by utilizing an ultrasonic B scanning method, an ultrasonic C scanning method, an ultrasonic D scanning method and an ultrasonic S scanning method to obtain an ultrasonic B+C+D+S scanning defective map; the maneuverability is high, the map characteristic description is relatively correct, comprehensive, the detection results are intuitionistic and reliable and the defective profile characteristic classification is clear, so that the intuitionistic determination evidence is provided for the final determination of quantification, qualitative property and positioning of the defects. By utilizing an ultrasonic B+C+D+S scanning function, a projection characteristic map of ultrasonic defects of the steel ingots in all directions of a Descartes three-dimensional coordinate can be acquired, so that the relatively-intuitionistic positions and the shape characteristics of the defects can be acquired. The accurate and intuitionistic prediction evidence is provided for quality evaluation of the steel ingots, forging operation card design and mechanical property evaluation of products; the effective quality guarantee is provided for a subsequent forging process and the elimination of universal forging operation cards.

Description

technical field [0001] The invention relates to the field of ultrasonic A scanning, in particular to an ultrasonic B+C+D+S scanning identification method for internal defects of steel ingots. Background technique [0002] In recent years, with the development of metallurgy, petrochemical, aerospace, shipbuilding and other industries, the demand for forgings has been increasing, so the quality requirements and quantity requirements for steel ingots have also increased accordingly. Since the quality of the steel ingot directly affects the subsequent processing and even the quality of the finished product, it is very important to inspect the surface and internal quality of the steel ingot. Usually, chemical composition inspection, surface quality inspection, ultrasonic flaw detection, magnetic particle flaw detection and low-magnification inspection are carried out on steel ingots to ensure the internal quality of steel ingots. [0003] Ultrasonic non-destructive testing tech...

Claims

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Application Information

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IPC IPC(8): G01N29/06
Inventor 张利陈昌华
Owner NANJING DEV ADVANCED MFG
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