System and method for ultrasonically testing multi-layer interface welding quality of bend composite part

Abstract

The invention discloses a system and a method for ultrasonically testing multi-layer interface welding quality of a bend composite part. The ultrasonic testing system comprises a centering tool, a flexible pipe, a probe, a driving mechanism and a flaw detector, wherein the centering tool is used for being inserted into an elbow pipe and is in a shape of a hollow pipe; a window communicated with inner and outer side faces of the centering tool is formed in the side wall of the centering tool; annular bulges are formed in the upper and lower sides of the window; the annular bulges are positioned on the outer side face of the centering tool and is in clearance fit with the inner wall of the elbow pipe; the centering tool, the annular bulges and the flexible pipe are made of plastics; an elbow pipe composite part comprises a first metal pipe formed by a first metal, a second metal pipe formed by a second metal, and a block body which is formed by a third metal and is provided with a through hole; the second metal pipe is inserted into the through hole and is welded with the block body; the first metal pipe is an elbow pipe, is inserted into the second metal pipe and is welded with the second metal pipe. According to the technical scheme, accurate positioning and quantitative determination of welding quality defects of two interfaces of the bend composite part are realized.

Description

technical field [0001] The invention relates to the technical field of ultrasonic detection, and mainly relates to an ultrasonic detection system and method for the welding quality of multi-layer interfaces of bent pipe composite parts. Background technique [0002] For the connection of new materials and the manufacture of complex and fine structural parts, diffusion welding technology is more and more widely used in the manufacturing industry due to its unique advantages and flexibility, and it is more and more used in the connection of important components. [0003] This connection technology was chosen for the divertor target plate part of the International Thermonuclear Experimental Reactor (ITER) device. The specific scheme is as follows: first, assemble and weld the oxygen-free copper tube (lining adaptation layer) and the tungsten block with round through holes to form an oxygen-free copper-lined tungsten block, and then use a chrome-zirconium copper elbow (heat sink...

AI Technical Summary

Problems solved by technology

However, when testing the welding quality of the multi-layer interface of the small-diameter elbow composite part, there are two problems: 1) the general probe shell is either thick or long, and cannot be inserted into the small-diameter elbow; 2) even if it can be inserted , there will also be centering positioning and controlled movement in the elbow, which will lead to undetectable or missed detection

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