Ultrasonic creeping wave probe defect echo positioning device and method

Abstract

The invention discloses an ultrasonic creeping wave probe defect echo positioning device and method. The device comprises a block A, and the block A comprises a block C at the right end; scale marks Aare arranged on the front side surface of the block A; the block C is positioned on the right side of the scale line A; a block B is welded on the left side of the block A; a manual notch groove is formed in the upper side surface of the block B; scale marks B are arranged on the front side face of the block B, the scale marks B are located on the right side of the artificial notch groove, ultrasonic creeping wave probes are arranged above the block A and the block B, wedge blocks are arranged in the ultrasonic creeping wave probes, piezoelectric wafers are arranged on the wedge blocks, and the ultrasonic creeping wave probes are connected with an ultrasonic flaw detector through signal lines. According to the method, the incident point and the time delay of the ultrasonic creeping wave probe can be conveniently, rapidly and accurately measured, the problem that the time delay and the incident point of the ultrasonic creeping wave probe cannot be measured on a common test block is solved, and then accurate positioning of the horizontal position of a defect can be found.

Description

technical field [0001] The invention relates to the technical field of ultrasonic creeping wave probes, in particular to an ultrasonic creeping wave probe defect echo positioning device and method. Background technique [0002] Open cracks on the surface of metal materials and buried cracks near the surface are considered to be extremely dangerous defects, which destroy the integrity of metal materials and reduce the safety factor of workpieces. The ultrasonic creeping wave probe produces a compression wave that propagates along the surface of the material and is very sensitive to surface and near-surface cracks. And because the longitudinal wave is the main component, the creeping wave is less disturbed by the workpiece surface scratches, unevenness, depressions, droplets, etc. than the surface wave. Therefore, the creeping wave is widely used in metal parts welds, steam turbine blades, crankshafts and other steel Non-destructive testing of surface opening cracks and near-...

AI Technical Summary

Problems solved by technology

[0003] However, since the creeping wave propagates along the surface of the metal material, and the refracted longitudinal and transverse waves in the steel exist at the same time, the testers cannot quickly and accurately find the highest echo on the arc surface on the conventional CSK-ⅠA standard test block like ordinary shear wave probes. The measured probe incidence point and delay, which affect the precise positioning of the horizontal position of the defect

[0004] For the above technical problems, no effective solution has been proposed at present

Images