高温锅炉管T22/TP347H异种钢焊接接头 早期失效原因
Causes of early failure of T22/TP347H dissimilar steel welded joints of high temperature boiler tubes
摘 要
采用化学成分分析、力学性能测试、金相检验和硬度测试等方法,分析了T22/TP347H异种钢焊接接头早期失效的原因。结果表明:在T22钢侧熔合区发现了氧化缺口;T22钢与焊缝的边界附近存在元素浓度梯度,产生了马氏体脆化层。建议选用合金元素含量更高的焊材或者镍基焊材,避免早期失效的发生。
早期失效
氧化缺口
马氏体脆化层
dissimilar steel welded joint
early failure
oxidation notch
martensite embrittlement layer
Abstract
The causes of early failure of T22/TP347H dissimilar steel welded joints were analyzed by means of chemical composition analysis, mechanical property test, metallographic examination and hardness test. The results show that oxidation notch was found in the side fusion zone of T22 steel. There was an element concentration gradient near the boundary between T22 steel and weld, which produced a martensite embrittlement layer. It was recommended to select welding materials with higher alloy element content or nickel based welding materials to avoid early failure.
中图分类号 TB31 DOI 10.11973/lhjy-wl202301017
所属栏目 质量控制与失效分析
基金项目
收稿日期 2022/3/22
修改稿日期
网络出版日期
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备注李昱伟(2001-),男,本科,主要从事焊接的研究工作,1175120997@qq.com
引用该论文: LI Yuwei,ZHANG Xiaoyong,ZHOU Yong,WANG Caixia. Causes of early failure of T22/TP347H dissimilar steel welded joints of high temperature boiler tubes[J]. Physical Testing and Chemical Analysis part A:Physical Testing, 2023, 59(1): 61～64
李昱伟,张骁勇,周勇,王彩侠. 高温锅炉管T22/TP347H异种钢焊接接头 早期失效原因[J]. 理化检验－物理分册, 2023, 59(1): 61～64
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参考文献
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