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A kind of ultrasonic flaw detection method of 7xxx series aluminum alloy square ingot

An ultrasonic and aluminum alloy technology, which is applied in the direction of analyzing solids using sound waves/ultrasonic waves/infrasonic waves, can solve the problems of low detection rate of metallurgical defects, scrapped plates, and irregularly distributed inclusions, etc.

Active Publication Date: 2019-06-18
NORTHEAST LIGHT ALLOY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a 7XXX series aluminum alloy square ingot to solve the problem that the existing flaw detection method has a low detection rate of metallurgical defects such as irregularly distributed inclusions and compound aggregation, and the plate is scrapped after multi-process processing. Ultrasonic flaw detection method

Method used

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  • A kind of ultrasonic flaw detection method of 7xxx series aluminum alloy square ingot
  • A kind of ultrasonic flaw detection method of 7xxx series aluminum alloy square ingot

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specific Embodiment approach 1

[0014] Specific implementation mode 1: a method for ultrasonic flaw detection of square ingots of 7XXX series aluminum alloys is specifically carried out according to the following steps:

[0015] 1. Probe selection: choose the longitudinal wave single crystal straight probe as the probe, select the model 5P8×15×2-2° dual crystal combination probe as the plate tracking flaw detection probe; according to the actual needs, use the longitudinal wave with a wafer diameter of 25mm and a probe frequency of 1MHz The single crystal straight probe is used as No. 1 probe, numbered 1P25; the longitudinal wave single crystal straight probe with a chip diameter of 28mm and the probe frequency of 1MHz is used as the No. 2 probe, and the number is 1P28; The single crystal straight probe is used as No. 3 probe, numbered 2P25; the longitudinal wave single crystal straight probe with a chip diameter of 28mm and a probe frequency of 2MHz is used as No. 4 probe, and the number is 2P28; The longit...

specific Embodiment approach 2

[0024] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the coupling agent used in the ultrasonic flaw detection in Step 6 is engine oil. Other steps are the same as in the first embodiment.

[0025] The couplant in this embodiment shall comply with the provisions in 7.5 of GB / T6519-2013.

[0026] The instrument used in the ultrasonic flaw detection mentioned in step 6 is an ultrasonic detector with high power, strong emission energy and strong anti-interference ability

specific Embodiment approach 3

[0027] Embodiment 3: The difference between this embodiment and Embodiment 3 is that the depth of the artificial injury of the flat-bottomed hole in step 2 is 10mm or 20mm, and the diameter of the flat-bottomed hole is Φ1.2mm, Φ2.0mm or Φ3.2mm. Other steps are the same as those in the third embodiment.

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Abstract

The invention relates to a 7XXX aluminium alloy square ingot ultrasonic flaw detection method. The 7XXX aluminium alloy square ingot ultrasonic flaw detection method is used for solving problems of the convention flaw detection method that detection rate on metallurgical defects such as disorderly distributed impurities and polymer aggregation is low, and sheet scrapping is easily caused via a plurality processing processes. The 7XXX aluminium alloy square ingot ultrasonic flaw detection method comprises following steps: 1, probe selection; 2, preparation of a reference test piece; 3, probe test, and drawing of an AVG curve; 4, flaw detection test of the reference test piece; 5, big flat yield value calculation of probes at different frequency; 6, determination of an optimal probe; and 7, detection of a casting ingot using the optimal probe. The 7XXX aluminium alloy square ingot ultrasonic flaw detection method is used for 7XXX aluminium alloy square ingot ultrasonic flaw detection.

Description

technical field [0001] The invention relates to an ultrasonic flaw detection method for a 7XXX series aluminum alloy square ingot. Background technique [0002] 7XXX series aluminum alloy square ingot is an important raw material for manufacturing aviation and aerospace. Due to the inhomogeneous structure of aluminum alloy ingots, coarse grains, and poor sound permeability, it is easy to generate large electrical noise signals, so ultrasonic flaw detection of ingots is difficult. The conventional method for the inspection of its internal structure is the low-magnification inspection method, that is, a certain number of ingot test pieces are cut according to the entire melting cycle for metallographic internal structure inspection. This inspection method has a very low probability of detecting metallurgical defects such as irregularly distributed inclusions and compound aggregation. Often due to the internal structural defects of the ingot, the ingot is processed into a fin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N29/04
CPCG01N29/04
Inventor 陈丽君王国军霍庆利王金花程辉包金刘超李德贵王洪玉
Owner NORTHEAST LIGHT ALLOY CO LTD