焊管2025，Vol.48Issue(11)：73-78,6.DOI:10.19291/j.cnki.1001-3938.2025.11.009
X射线数字成像对金属材料缺陷自身高度的定量检测研究
Quantitative Detection of Defect Height by X-ray Digital Imaging
摘要
Abstract
In order to achieve quantitative and positioning detection of the defect height in metal materials,titanium alloy test blocks containing artificial defects of different heights were used as the research object,and X-ray digital imaging(DR)technology was used to conduct experiments.By controlling the penetration thickness,changing the position of defects in the depth direction of the test block,and exposure parameters such as tube voltage,DR images under different conditions are collected to analyze the grayscale difference between defects and surrounding base materials,explore the correlation between defect height and grayscale difference,and establish a defect height grayscale difference model.Results indicate that when the penetration thickness is constant,there is a linear relationship between the height of the defect itself and the grayscale difference,and the change in the position of the defect in the depth direction has a weak impact on the grayscale difference.Increasing the tube voltage can improve the sensitivity of defect detection,but there are differences in the fitting curve characteristics under different exposure parameters.DR images that meet the grayscale range of NB/T 47013.11 standard can provide a reliable basis for analysis.The establishment of the model requires controlling exposure parameters and obtaining grayscale difference data corresponding to at least two defects of different heights on the test block.This method provides a reference for quantitative detection of defects in metal materials using X-ray digital imaging of their own height.关键词
体积形缺陷/X射线数字成像/灰度差/缺陷自身高度/缺陷位置Key words
volume defect/X-ray digital imaging/grayscale difference/defect height/defect location分类
金属材料引用本文复制引用
宋鸿玉,穆晨光,倪伸伸,高福洋..X射线数字成像对金属材料缺陷自身高度的定量检测研究[J].焊管,2025,48(11):73-78,6.基金项目
中国船舶集团有限公司第七二五研究所科技创新项目"钛合金焊接缺陷数字射线检测智能识别和局部3D定量评价"(项目编号LW220807). （项目编号LW220807）
