| 汪翔,王强.奥氏体不锈钢焊缝的优化相位相干加权因子全聚焦成像实验分析*[J].,2025,43(3):789-798 |
| 奥氏体不锈钢焊缝的优化相位相干加权因子全聚焦成像实验分析* |
| Experimental analysis of austenitic stainless steel welds with full focus imaging by optimizing phase coherence weighting factor |
| 投稿时间：2024-01-05 修订日期：2025-04-25 |
| 中文摘要: |
| 针对奥氏体不锈钢焊缝存在粗大的柱状晶组织以及在整体上呈现出各向异性和不均匀性导致的超声衰减严重的问题，该文提出一种优化相位相干加权因子的全聚焦成像算法(OPCF-TFM)，对奥氏体不锈钢焊缝区进行实验。结果表明：利用OPCF-TFM算法能够较好地检测奥氏体不锈钢试块焊缝区内部的φ1mm横通孔缺陷的位置。该算法与全聚焦成像算法相比，缺陷的定位误差平均值可以降低0.1308mm，缺陷的宽度误差平均值可以降低0.1308mm，缺陷的信噪比可以提升?0.648～4.387 dB不等，表明OPCF-TFM算法检测奥氏体不锈钢的焊缝区更有优势且有较好的应用前景。 |
| 英文摘要: |
| The austenitic stainless steel weld has a coarse columnated crystal structure and presents anisotropy and inhomogeneity on the whole, which leads to serious ultrasonic attenuation. In this paper, a total-focus imaging algorithm which optimizes the phase coherence weighting factor(OPCF-TFM) is proposed to test the weld zone of austenitic stainless steel. The results show that OPCF-TFM algorithm can well detect the location of the φ1mm cross through hole defects in the weld zone of austenitic stainless steel test block. Compared with the full-focus imaging algorithm, the proposed algorithm can reduce the average positioning error of defects by 0.1308mm, the average width error of defects by 0.1308mm, and the SNR of defects can be improved from ?0.648dB to 4.387dB, indicating that the OPCF-TFM algorithm has more advantages in detecting the weld zone of austenitic stainless steel and has a good application prospect. |
| DOI：10.11684/j.issn.1000-310X.2025.03.028 |
| 中文关键词: 奥氏体不锈钢 全聚焦算法 信号后处理 相位相干因子 |
| 英文关键词: Austenitic steel weld Total focusing method Signal post-processing Phase coherence factor |
| 基金项目:浙江省重点研发计划项目(编号：2022C03179) |
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