Fully-focused detection method used for coarse-grained materials and based on phased array ultrasonic flaw detector

Abstract

The invention relates to technical field of non-destructive testing, in particular to a fully-focused detection technology used for coarse-grained material weld joints and based on an M2M phased arrayultrasonic flaw detector. The fully-focused detection technology includes: using the M2M phased array ultrasonic flaw detector as the detection instrument to form a rectangular scanning area on a to-be-detected workpiece, and allowing the scanning area to cover the weld joints and heat affected zone of the to-be-detected workpiece; using M2M instrument detection software to divide the weld jointsand heat affected zone of the to-be-detected workpiece into countless points, focusing each point, and collecting scanning data; using a scanning rack to detect the to-be-detected workpiece, collecting full-weld-joint scanning data, and performing quality evaluation according to related to standards. The detection technology has the advantages that the to-be-detected areas are divided into countless points by using a two-dimensional linear probe, focused detection is performed on each point, the detection sensitivity of the areas can be effectively increased, and effective detection of coarse-grained materials can be achieved; the M2M phased array ultrasonic flaw detector is used to perform optimal algorithm processing on the data, data quantity is reduced, and storage and on-site detection and analysis are facilitated.

Description

technical field [0001] The invention relates to the technical field of non-destructive testing, in particular to an all-focus detection technology for weld seams of coarse-grained materials based on an M2M phased array ultrasonic flaw detector. Background technique [0002] At present, phased array ultrasonic testing technology is used to detect materials such as ferritic steel and fine-grained stainless steel, which has a high defect detection rate and high reliability of the detection process. However, the use of traditional phased array ultrasonic testing technology to detect welds of coarse-grained materials, due to the disadvantages of coarse grains, anisotropy of the acoustic beam, and poor signal-to-noise ratio, leads to missed and undetectable defects. Conventional probes and process skills can achieve point focus and line focus, which cannot solve the detection problems of coarse-grained materials in terms of detection sensitivity and data processing. Coarse-grain...

AI Technical Summary

Problems solved by technology

However, the use of traditional phased array ultrasonic testing technology to detect welds of coarse-grained materials, due to the disadvantages of coarse grains, anisotropy of the acoustic beam, and poor signal-to-noise ratio, leads to missed and undetectable defects.

Conventional probes and process skills can achieve point focus and line focus, which cannot solve the detection problems of coarse-grained materials in terms of detection sensitivity and data processing. Coarse-grained materials exist in large quantities in industries such as thermal power, nuclear power, petroleum and petrochemical, bridges and ships, and research can detect The Phased Array Ultrasonic Testing Process of Coarse Grained Materials is Imminent

Images