Under　the　action　of　welding　thermal　cyclic　load,　the　internal　peritectic　structure　of　austenitic　stainless　steel　weld　is　coarse　columnar　crystal,　and　its　orientation　is　anisotropic　in　different　areas　of　the　weld.　The　nondestructive　testing　of　austenitic　stainless　steel　welds　is　conducted　using　method　of　ultrasonic　array　for　the　ultrasonic　scattering　caused　by　coarse　columnar　crystals　and　the　sound　beam　deflection　caused　by　different　grain　orientations.　A　signal　analysis　method　based　on　decomposition　of　the　time-reversal　operator　is　developed　for　noise　reduction　processing　of　ultrasound　full　matrix　data.　Using　ray　tracing　method,　the　ultrasonic　wave　propagation　path　determination　method　in　anisotropic　media　was　investigated　and　applied　to　the　correction　of　beam　deflection　for　ultrasonic　array　total　focus　imaging　of　austenitic　stainless　steel　welds.　Nondestructive　testing　of　austenitic　stainless　steel　welds　was　conducted　using　ultrasonic　array,　and　the　results　showed　that　the　time-reversal　operator-based　decomposition　method　was　effective　for　the　suppression　of　scattering　noise　in　the　detection　signal　and　highlight　the　echoes　from　defects,　which　can　improve　the　signal-to-noise　ratio　of　full-focus　imaging　by　10　dB,　moreover　the　beam　deflection　correction　can　improve　the　accuracy　of　defect　localization　in　total　focus　imaging　of　ultrasonic　arrays.　Copyright　©　2022　Transactions　of　the　China　Welding　Institution.　All　rights　reserved.