基于熔宽的激光焊缝超声波检测成像分析  

Ultrasonic Test Imaging Analysis of Laser Weld Based on Weld Width

作　　者：周广浩 程志义 张勇 杜雨欣 陈磊 毕浩棋 李洋 ZHOU Guanghao;CHENG Zhiyi;ZHANG Yong;DU Yuxin;CHEN Lei;BI Haoqi;LI Yang(Quality Assurance Department,CRRC Changchun Railway Vehicles Co.,Ltd.,130062,Changchun,China)

机构地区：[1]中车长春轨道客车股份有限公司质量保证部,长春130062

出　　处：《城市轨道交通研究》2022年第2期57-60,共4页Urban Mass Transit

摘　　要：利用超声波检测技术对不锈钢搭接焊缝质量进行了评估研究。使用二维阵列式探头对激光焊缝进行了检测,分析了不同熔合区域对A扫描回波信号的影响,并对熔合区域进行了C扫描成像。基于熔合特征信息提出了等效熔宽的概念,利用统计方法建立了等效熔宽的数学计算模型。结果表明,该模型的计算精度能够充分满足实际工程应用需要。In this paper,ultrasonic testing technology is used to conduct an evaluation study of the stainless steel lap weld quality.The weld joint is inspected by 2D array ultrasonic probe,the effects of different fusion areas on A-scan echo signal are analyzed,and the fusion areas are imaged by C-scan.A concept of equivalent melting width is proposed according to the characterization of fusion state,and a computational model of equivalent melting width is established based on statistical method.Testing results show that the calculation accuracy of the model could completely meet the requirements of engineering application.

关 键 词：激光焊缝 超声波检测成像 熔宽 

分 类 号：U213.93[交通运输工程—道路与铁道工程]