Fillet weld phased array detection method and auxiliary tool

The invention relates to the field of welding seam detection, in particular to a fillet welding seam phased array detection method and an auxiliary tool. Comprising the following steps: selecting a detection instrument and a probe, selecting a coupling agent, setting a focusing rule, manufacturing a reference block, scanning the reference block, selecting a scanning mode, scanning a workpiece to be detected, determining defect size parameters, evaluating defects and positioning the defects. The phased array detector is adopted to determine and evaluate the defect parameters through the water-cooled wall bandage fillet weld, and position the defect position, so that the defect state of the spiral water-cooled wall bandage fillet weld in use is detected, and a basis is provided for repair and maintenance. The invention further discloses an auxiliary tool for fillet weld phased array detection, assistance is provided for detection scanning, detection personnel can conveniently detect fillet welds at different po