Double-inclined transducer

Abstract

The invention relates to a diclinic transducer which is used for detecting the defects of a workpiece, belonging to the technical field of ultrasonic probe. The diclinic transducer is provided with a hollow shell with an opening at one end; the opening end of the shell is provided with a wedge block; the shell is internally provided with at least two wafers; the positive surface and the reverse surface of the wafer are respectively connected with a leading wire which is connected with a socket; the two wafers consist of an emitting wafer and a receiving wafer; the emitting wafer and the receiving wafer have an incident angle of 33-70 degrees with the opening end surface of the shell, and the emitting wafer has a deviation angle of 0.3-8 degrees with the receiving wafer; a sound boarding is arranged between the emitting wafer and the receiving wafer; the ultrasonic frequency emitted by the emitting wafer is within 1MHz to 4MHz; the wafer surface is provided with noise elimination material; the area of the wafer is within 6mm*10mm to 15mm*30mm, the flaw detection depth is large and the detection exactness is high.

Description

technical field [0001] The invention relates to the field of ultrasonic probes, in particular to a double-slope transducer that can easily detect workpiece defects. Background technique [0002] At present, in the chemical industry and nuclear power industry, the quality requirements for various workpieces are very high, and each workpiece needs to be inspected. The existing technology has X-ray inspection, which pollutes the environment very much and is very inconvenient. Ultrasound is used to detect defects, so the requirements for it are getting higher and higher. In the use of workpieces, the use of stainless steel workpieces is very large, especially stainless steel is divided into fertenite, martensite, austenite, nickel-based alloys, and the processing of materials is divided into forging, wrench, centrifugal Casting, manual welding, automatic welding, etc. form various materials with different sound velocities and interface reflections, mainly resulting in scatterin...

AI Technical Summary

Problems solved by technology

[0002] At present, in the chemical industry and nuclear power industry, the quality requirements for various workpieces are very high, and each workpiece needs to be inspected. The existing technology has X-ray inspection, which pollutes the environment very much and is very inconvenient. Ultrasound is used to detect defects, so the requirements for it are getting higher and higher

In the use of workpieces, the use of stainless steel workpieces is very large, especially stainless steel is divided into fertenite, martensite, austenite, nickel-based alloys, and the processing of materials is divided into forging, wrench, centrifugal Casting, manual welding, automatic welding, etc. form various materials with different sound velocities and interface reflections, mainly resulting in scattering, crystal interface scattering and diffraction, etc. To solve the defects in the detection materials, mostly shear wave single crystal or double crystal is used, and its sensitivity is low. , The signal-to-noise ratio is poor, and it is difficult to identify defects. Especially when testing thick parts, the flaw detection of the welded part is more difficult. The depth of the flaw detection is not enough, resulting in incomplete flaw detection. In addition, the contact method is used for detection. The contact surface of the workpiece will be worn, which will affect the property value of the probe. At the same time, the reliability of the contact is poor, and it is easy to cause false alarms and losses during the flaw detection process.

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