An Ultrasonic Phased Array Inspection Method for Pipe Seat Fillet Welds

Abstract

The invention provides a tube socket angular weld ultrasonic phased array detection method. The method comprises the following steps: carrying out fracture surface scanning on a tube socket angular weld workpiece in the counter-clockwise direction by using a two-axis scanning mode to obtain at least one fan scanning image under current scanning fracture surface; taking the axle wire of a support tube as y axis, taking the intersection point of the axle wire of a mother tube and the axle wire of the support tube as an origin of coordinates to establish a rectangular coordinate system, and constructing the intersecting line analysis equations of the current scanning fracture surface and the tube socket angular weld workpiece respectively; according to the intersecting line analysis equations, drawing the intersecting lines of the current scanning fracture surface and the tube socket angular weld workpiece on each fan scanning image, and analyzing the defect condition of the tube socket angular weld workpiece according to the intersecting lines. According to the method, the intersecting lines of the tube socket angular weld workpiece and the current scanning fracture surface are drawnon the fan scanning images, so that the defect condition of the tube socket angular weld workpiece can be analyzed accurately according to the intersecting lines.

Description

technical field [0001] The invention relates to the field of non-destructive flaw detection of welds, in particular to an ultrasonic phased array detection method for fillet welds of pipe seats. Background technique [0002] Tube seat fillet weld is a common structure, which is widely used in boiler equipment, nuclear power pipelines, oil pipelines and other fields. Since the structure is prone to stress concentration, if there is a welding defect, it will easily expand during use and cause weld cracking and failure. Therefore, when in use, it is necessary to detect the defects inside the fillet weld of the pipe seat. [0003] In the actual testing process, due to the very complex geometric structure of the pipe seat fillet weld itself, it is difficult to accurately and effectively conduct non-destructive testing with conventional ultrasonic phased array testing methods, and it is impossible to accurately determine the location of the defect. Moreover, the end of the branc...

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Problems solved by technology

[0004] An embodiment of the present invention provides an ultrasonic phased array detection method for pipe seat fillet welds, so as to solve the problem of inability to accurately determine the location of defects in the ultrasonic phased array nondestructive detection method in the prior art, and to distinguish which are real defects and which are corner reflection problem

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