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Ultrasonic inspection method of back end of thick-wall aluminum alloy pipe

A detection method, ultrasonic technology, applied in the direction of using sound wave/ultrasonic wave/infrasonic wave to analyze solids, etc., can solve problems such as incomplete detection, improve detection accuracy and detection efficiency, improve accuracy and detection efficiency, and eliminate shrinkage residue Effect

Active Publication Date: 2009-06-03
NORTHEAST LIGHT ALLOY CO LTD
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Problems solved by technology

[0003] The invention solves the problem of incomplete detection of the shrinkage residue of aluminum alloy thick-walled pipes in the existing metallographic sampling inspection method

Method used

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  • Ultrasonic inspection method of back end of thick-wall aluminum alloy pipe
  • Ultrasonic inspection method of back end of thick-wall aluminum alloy pipe

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specific Embodiment approach 1

[0016] Specific implementation mode 1: The specific steps of the ultrasonic detection method for tail shrinkage of aluminum alloy thick-walled tubes described in this implementation mode are as follows:

[0017] Step 1: According to the characteristics of thick-walled pipe shrinkage, select the ultrasonic detector and the supporting longitudinal wave straight probe and short front shear wave oblique probe;

[0018] Step 2: Comparison of the selection of sample tubes and hole making: Cut two sections of non-defective aluminum alloy thick-walled tube sample tubes with a length of 60mm, a wall thickness of 30mm, and an outer diameter of Φ150mm, according to the shrinkage shape and depth of the thick-walled tube Distribution characteristics, drilling Φ0.4mm flat-bottomed holes and Φ0.4×6mm short horizontal holes with different depths between 2 and 25mm;

[0019] Step 3: Make and debug the shear-wave oblique probe; grind the contact surface between the shear-wave oblique probe and ...

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Abstract

An ultrasonic inspection method of a back end of a thick-wall aluminum alloy pipe relates to a method for inspecting the back end of the thick-wall aluminum alloy pipe and solves a problem that the inspection is not complete when a presently-adopted metallographical random inspection method is used for inspecting back end residual of a thick-wall aluminum alloy pipe workpiece. The ultrasonic inspection method is as follows: selecting an ultrasonic detector and a longitudinal wave normal probe and a transversal wave angle probe which are assorted with the ultrasonic detector; grinding an interface between the transversal wave angle probe and a workpiece into a cambered surface with curvature which is the same as the curvature of the pipe workpiece; debugging the ultrasonic detector and the probes in a combined manner; then, by using the two probes, simultaneously carrying out ultrasonic inspection on a tail end of the thick-wall aluminum alloy pipe workpiece to be inspected; moving the probes towards the pipe tail part by starting from a position in which echo wave amplitude of the ultrasonic probes is 80 percent of a full swing, till the amplitude is not greater than 1 percent; and cutting a 20-millimeter section of the pipe workpiece in a direction, which is the reverse of the movement direction of the ultrasonic probes, by taking the position as a boundary. The invention can realize 100-percent inspection of products, avoids phenomena of missed inspection of the back end residual and waste of surplus cut finished products, and ensures the product quality.

Description

technical field [0001] The invention relates to a detection method for shrinkage of an aluminum alloy thick-walled tube. Background technique [0002] Aluminum alloy thick-walled tubes are important materials used in aviation and aerospace fields. If there is tailing residue in the tube wall, inclusions and crack defects will occur during die forging and machining, resulting in product scrap. At present, metallographic (low magnification) method is still used for proportional sampling inspection of the shrinkage of aluminum alloy thick-walled pipes, which makes the pipes that have not been extracted may still have shrinkage residues, which poses a major hidden danger to product production. It is detected by scientific ultrasonic method, which can effectively guarantee the quality of military products. Contents of the invention [0003] The invention solves the problem of incomplete detection existing in the conventional metallographic sampling inspection method for detect...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N29/04
Inventor 张利程辉杨建伟刘科研杨伟刚
Owner NORTHEAST LIGHT ALLOY CO LTD
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