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Nondestructive flaw detection method for aluminum alloy bar by adopting ultrasonic technology

A non-destructive flaw detection and aluminum alloy technology, which is applied in the analysis of solids using sonic/ultrasonic/infrasonic waves, can solve the problems of large error and low flaw detection work efficiency, and achieve the effect of small error, high work efficiency and improved accuracy.

Inactive Publication Date: 2015-03-04
NORTHEAST LIGHT ALLOY CO LTD
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Problems solved by technology

[0003] The purpose of the present invention is to solve the problem of low working efficiency and large error of flaw detection by contact method, and to provide a non-destructive flaw detection method for aluminum alloy rods using ultrasonic technology

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  • Nondestructive flaw detection method for aluminum alloy bar by adopting ultrasonic technology
  • Nondestructive flaw detection method for aluminum alloy bar by adopting ultrasonic technology
  • Nondestructive flaw detection method for aluminum alloy bar by adopting ultrasonic technology

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specific Embodiment approach 1

[0015] Specific implementation mode one: the following combination Figure 1 to Figure 6 To illustrate this embodiment, the non-destructive detection method for aluminum alloy rods using ultrasonic technology described in this embodiment, the method includes the following steps:

[0016] Step 1. Grinding the bottom of the longitudinal-wave dual crystal probe to form an inner arc, which matches the outer arc of the aluminum alloy bar to be detected;

[0017] Step 2. Draw the Φ1.2mm flat-bottomed hole distance-amplitude DAC curve and the Φ0.8mm flat-bottomed hole distance-amplitude DAC curve using the flat-bottomed hole test block; and adjust the flaw detection sensitivity, which includes benchmark sensitivity, detection sensitivity and scanning sensitivity ;

[0018] Step 3. Place the longitudinal wave dual crystal probe on the outer surface of the aluminum alloy bar to be tested, and scan along the longitudinal direction of the bar; the scanning speed is ≤ 200mm / s, and the ov...

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Abstract

The invention relates to a nondestructive flaw detection method for an aluminum alloy bar by adopting an ultrasonic technology, which belongs to the field of metal flaw detection, and is used for solving the problems of low working efficiency and large error caused by adopting a contact flaw detection method. The method comprises the following steps: step 1, grinding the bottom of a longitudinal-wave twin-crystal probe to form an inner arc, wherein the inner arc is matched with an outer arc of the aluminum alloy bar to be detected; step 2, drawing a pi1.2mm flat-bottom hole distance-amplitude DAC curve and a pi0.8mmn flat-bottom hole distance-amplitude DAC curve by adopting a flat-bottom hole test block; debugging the flaw detection sensitivity, wherein the flaw detection sensitivity comprises benchmark sensitivity, detection sensitivity and scanning sensitivity; and step 3, placing the longitudinal wave twin-crystal probe on an outer circular surface of the aluminum alloy bar to be detected, and scanning the bar along the longitudinal direction; and labeling a rotation mark on the bar, wherein the bar is rotated for three times, and each rotation angle is 90+ / -2 degrees, so that the complete circumferential area of the aluminum alloy bar to be detected can be scanned.

Description

technical field [0001] The invention relates to a nondestructive flaw detection method, which belongs to the field of metal flaw detection. Background technique [0002] Aluminum alloy pre-bars are important materials used in aviation and aerospace industries. With the rapid development of national defense and aviation technology, the requirements for internal quality inspection are becoming increasingly stringent. Over the years, our company has developed and produced a variety of alloys and aluminum alloy bars of various specifications (such as: 5A06, 2A14, 7050, 7075, etc.; Φ30, Φ100, Φ130, Φ200, etc.), and has accumulated rich production experience. In the past two years, due to the continuous improvement of users' requirements for the internal quality and performance of products, the requirements for flaw detection have also become more stringent, from A level to AA level, thus improving the requirements for flaw detection methods, quality responsibility requirements, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N29/04
Inventor 包金张磊马振波霍庆利程辉李莉赵波杨志刚王欢
Owner NORTHEAST LIGHT ALLOY CO LTD
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