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试验研究
试验研究
DOI:10.11973/wsjc240029
SUPER304/T92 异种钢焊接件热老化的涡流检测
李途岩 ,吴 斌 1, 2 ,王钰珏 1, 2 ,刘秀成 1, 2 ,王 楠 ,李 鹏 1, 2
1
1
(1. 北京工业大学 材料与制造学部,北京 100124;2. 北京工业大学 信息学部 北京 100124)
摘 要:异种钢焊接接头是超(超)临界发电机组管道的薄弱环节,在高温高压作用下易出现力
学性能退化甚至失效现象。涡流检测是金属材料检测的一种重要方法,采用涡流法对SUPER304/
T92异种钢焊接件的热老化进行检测。首先,研制涡流传感器并搭建了涡流扫查试验平台;其次,
开展涡流扫频试验,分析不同激励频率对焊接试件涡流检测能力的影响,优选三种励磁频率下的涡
流检测信号,并结合试件的金相显微组织进行分析;最后,研究SUPER304、焊缝和T92三种不同
区域的涡流信号随热老化时间的变化关系,并与试件表面硬度进行相关性分析。试验结果为异种
钢焊接件的热老化评估提供了一种有效的无损检测方法。
关键词:涡流无损检测;热老化;异种钢焊接试件;硬度
中图分类号:TG115.28 文献标志码:A 文章编号:1000-6656(2024)09-0001-06
The eddy current test of thermal aging of SUPER304/T92 dissimilar steel
welded parts
LI Tuyan , WU Bin , WANG Yujue , LIU Xiucheng , WANG Nan , LI Peng 1,2
1,2
1,2
1
1
1,2
(1. Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing 100124, China;
2. Faculty of Information, Beijing University of Technology, Beijing 100124, China)
Abstract: The dissimilar steel welded joint in the ultra-critical generator set pipeline is considered as a weak link,
susceptible to mechanical property degradation or even failure under high temperature and pressure conditions. Eddy
current testing (ECT) is an important method for evaluating metal material properties. In this study, ECT was employed
to detect thermal aging in SUPER304/T92 dissimilar steel welded parts. Firstly, an eddy current sensor was developed
and an experimental platform for eddy current scanning was constructed. Secondly, a frequency sweep experiment was
conducted to analyze the influence of different excitation frequencies on the eddy current detection capability of the welded
specimens. Eddy current detection signals were selected from three excitation frequencies and analyzed in conjunction
with the metallographic microstructure of the specimens. Finally, the relationship between eddy current signals in three
different areas (SUPER304, weld and T92) and thermal aging time was explored while correlating it with surface hardness
measurements of the specimen. The research results provided an effective nondestructive testing method for evaluating
thermal aging in dissimilar steel welds.
Key words: eddy current nondestructive testing; thermal aging; dissimilar steel welded specimen; hardness
超(超)临界机组在不同的区域管道中蒸汽参 数不同,所需材料的导热性、高温蠕变断裂强度等要
求也不同,因此存在大量的SUPER304/T92异种钢
收稿日期: 2024-01-22 管焊接接口 。SUPER304钢、T92钢主要材料成分
[1]
基金项目: 国家自然科学基金(12122201,62271015,12302237)
分别是奥氏体和马氏体,其热膨胀系数、化学成分及
作者简介:李途岩(1999—),女,硕士研究生,专业方向为电磁无损
力学性能等有较大区别。异种钢焊接接头是管道薄
检测
通信作者: 王钰珏(1990—),男,讲师,博士,研究方向为无损检测 弱环节,在高温高压的长期作用下易出现高温蠕变、
与评价,wangyujue@bjut.edu.cn 高温疲劳等力学性能退化甚至失效的现象 [2-4] ,导致
1
2024 年 第 46 卷 第 9 期
无损检测

