Ultrasonic detection method of ultrahigh-strength steel thin-wall spinning cylinder

Abstract

The invention discloses an ultrasonic detection method of an ultrahigh-strength steel thin-wall spinning cylinder, comprising the following steps of: processing through-hole artificial defect comparison samples, carrying out initial sensitivity calibration on the basis, adding plate wave detection on the basis of the original single-transverse wave detection, respectively detecting in an axial direction and an annular direction, and then positioning defects by adopting a liquid-drip interference method. Compared with the traditional detection method, the method has the advantages of high processing precision of the artificial defect comparison samples, small error of initial sensitivity calibration, simultaneous detection of plate waves on the surface quality, the near surface quality and the inner quality of the ultrahigh-strength steel thin-wall spinning cylinder high defect detectable rate, rapid and accurate positioning and the like, solves the problems of high quality control difficulty of the ultrahigh-strength steel thin-wall spinning cylinder and unstable quality condition of a solid engine steel shell, can effectively ensure the quality of the ultrahigh-strength steel thin-wall spinning cylinder and improve the using safety and reliability of the solid engine steel shell.

Description

technical field [0001] The invention relates to the technical field of non-destructive testing, in particular to an ultrasonic testing method for an ultra-high-strength steel thin-wall spinning cylinder. Background technique [0002] Due to its good comprehensive performance, the ultra-high-strength steel thin-wall spinning cylinder replaces the plate welding cylinder technology to manufacture solid rocket motor casings. Because the ultra-high-strength steel thin-wall spinning cylinder has a small wall thickness, cylindrical shape, and long diameter The large ratio and the surface has the characteristics of spinning corrugation, so that the conventional detection technology does not have complete effectiveness for its detection, and the reliability of the detection results is low. [0003] The main production process of ultra-high-strength steel thin-walled spinning cylinder is forging machine processing→rough spinning→intermediate annealing→semi-finishing→intermediate annea...

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Problems solved by technology

[0005] The ultra-high-strength steel thin-wall spinning cylinder is tested according to the existing ultrasonic testing method. The artificial defect comparison sample used is groove-shaped, and the difficulty of processing makes the consistency of the width and depth of the groove poor, resulting in large initial sensitivity calibration errors. At the same time, because the length direction of the circumferential groove is consistent with the spinning corrugation direction of the cylinder, the clutter display with a wave height greater than 20% due to the influence of the spinning corrugation during the initial sensitivity calibration, the initial sensitivity is low; only the transverse wave is used to test the cylinder Scanning, when the extension direction of the defect is close to or parallel to the incident angle of the shear wave, and when the defect is located in the blind area near the surface of the shear wave, the defect will be difficult to detect; after the defect is found, the sound path method or the sample comparison method is used to locate the defect, that is First move the probe to find the position with the highest reflected wave height of the defect, and then use the sound path ratio to calculate the defect position. Due to the influence of the curvature, thickness and surface finish of the cylinder, the positioning calculation error is large

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