压力容器2025，Vol.42Issue(4)：64-71,8.DOI:10.3969/j.issn.1001-4837.2025.04.009
奥氏体不锈钢支管台的相控阵超声相位相干成像检测技术研究
Research on detection technology ultrasonic phased array phase coherence imaging of an austenitic stainless steel weldolet
摘要
Abstract
The austenitic stainless steel weldolet had significant grain scattering noise during ultrasonic testing.Also,the complex structure of weldolet caused varying structural noise during inspection,leading to missed detections and misjudgments.In response to the above problems,the phase coherent imaging was weighted based on the directivity correction factor and the sound velocity attenuation factor.An amplitude-corrected phase coherent imaging method was proposed to improve the signal-to-noise ratio of the imaging results,and a simulation model was put forward to verify the effectiveness of this method.The results show that,compared with the fully focused method,the signal-to-noise ratio of the amplitude-corrected phase coherence imaging method has increased by 19.01 dB.By preparing the weldolet specimens of 304 stainless steel and 20#steel,the full matrix data are collected using the linear array probe for imaging processing.For the 304 stainless steel weldolet,the signal-to-noise ratio of the method proposed in this paper is increased by up to 13.29 dB compared with the fully focused method.For the 20#steel weldolet,the signal-to-noise ratio of the method proposed in this paper is increased by up to 13.20 dB compared with the full focusing method.The research results can provide a reference for the ultrasonic imaging detection of the weldolet.关键词
奥氏体不锈钢/支管台/信噪比/全聚焦方法/相位相干成像Key words
austenitic stainless steel/weldolet/signal-to-noise(SNR)/total focusing method/phase coherence imaging分类
机械制造引用本文复制引用
陈喆,陈学东,卜阳光,程经纬..奥氏体不锈钢支管台的相控阵超声相位相干成像检测技术研究[J].压力容器,2025,42(4):64-71,8.基金项目
国家重点研发计划项目(2022YFC3070100) （2022YFC3070100）
国家自然科学基金项目(52202412) （52202412）
