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Ultrasonic flaw detection method for fatigue cracks on inner surface of eccentric long hole

A technology of fatigue cracks and long holes, applied in the direction of using sonic/ultrasonic/infrasonic waves to analyze solids, etc., can solve the problems of difficult flaw detection, difficult flaw detection operation, low flaw detection efficiency, etc., to achieve high flaw detection efficiency, reliable and easy flaw detection results. The effect of using promotion

Inactive Publication Date: 2014-07-23
CRRC QISHUYAN CO LTD
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Problems solved by technology

[0003] In order to overcome the disadvantages of difficult operation, low detection efficiency and high difficulty of flaw detection in the existing eccentric long hole inner surface fatigue crack detection, the present invention provides an ultrasonic flaw detection method for eccentric long hole inner surface fatigue crack

Method used

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  • Ultrasonic flaw detection method for fatigue cracks on inner surface of eccentric long hole
  • Ultrasonic flaw detection method for fatigue cracks on inner surface of eccentric long hole
  • Ultrasonic flaw detection method for fatigue cracks on inner surface of eccentric long hole

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Embodiment Construction

[0017] An ultrasonic flaw detection method for fatigue cracks on the inner surface of an eccentric long hole comprises the following steps: making an artificial test block→detecting the upper half circumference of the artificial test block→detecting the lower half circumference of the artificial test block. Manufacture of artificial test blocks: make artificial test blocks according to the actual cracks, and make artificial defects on the test blocks. F1, F2, F3 and F4 are all 1mm deep line cutting grooves, and the angle between F1 and the radius direction of the large circle is 0° , the angle between F2 and the radial direction of the large circle is 135°, the angle between F3 and the radial direction of the large circle is 45°, and the angle between F4 and the radial direction of the large circle is 180°; to detect the upper half circle of the artificial test block: use K1 shear wave oblique For the probe, after determining the gain according to the artificial defect on the a...

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Abstract

The invention relates to the technical field of ultrasonic flaw detection methods and in particular to an ultrasonic flaw detection method for fatigue cracks on the inner surface of an eccentric long hole. The method comprises the following steps: manufacturing a manual test block, detecting the upper half circumference of the manual test block, and detecting the lower half circumference of the manual test block. The ultrasonic flaw detection method is simple and reasonable to operate, convenient and rapid to use, reliable in flaw detection result and easy to use and popularize, the difficulty in flaw detection on fatigue cracks on the inner surface of the eccentric long hole is alleviated, the flaw detection efficiency is high, and the quality and the use security of a workpiece with the eccentric long hole are ensured.

Description

technical field [0001] The invention relates to the technical field of an ultrasonic flaw detection method, in particular to an ultrasonic flaw detection method for fatigue cracks on the inner surface of an eccentric long hole. Background technique [0002] Fatigue defects on the inner surface of long holes lack ready-to-use ultrasonic flaw detection methods. The existing methods can only effectively scan the area of ​​less than 90° near the outer circumference of the long oil hole, and the defect wave is not easy to distinguish. Fatigue defects on the inner surface of long holes cannot be implemented by means of surface inspection, and the flaw detection is difficult. It can only be detected by ultrasonic waves. Two or three kinds of probes are required for flaw detection, and the probes are detected on the side of the cylinder. There is a lack of ready-made tooling to use, and the flaw detection operation is difficult. , the flaw detection efficiency is low. Contents of...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N29/04
Inventor 胡德明朱岗沈科贺安龙段晓华
Owner CRRC QISHUYAN CO LTD
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