长寿命高可靠性焊接结构  

Long-Life and High-Reliability Welded Structures

作　　者：徐连勇[1,2,3] Xu Lianyong(School of Materials Science and Engineering,Tianjin University,Tianjin 300350,China;Tianjin Key Laboratory of Advanced Joining Technology,Tianjin 300350,China;State Key Laboratory of Engines,Tianjin University,Tianjin 300350,China)

机构地区：[1]天津大学材料科学与工程学院,天津300350 [2]天津市现代连接技术重点实验室,天津300350 [3]天津大学内燃机燃烧学国家重点实验室,天津300350

出　　处：《天津大学学报（自然科学与工程技术版）》2022年第1期1-10,共10页Journal of Tianjin University：Science and Technology

基　　金：国家杰出青年科学基金资助项目(52025052);国家自然科学基金资助项目(51975405,51575382,51475326,50975196,50805103).

摘　　要：现代装备结构的设计与成形制造面临着极端复杂环境和长寿命安全服役的双重挑战,焊接接头因其自身特性一直是焊接结构可靠性的最薄弱环节.本文以火电蒸汽管道和深海油气管道等能源装备中的主管道为对象,针对主管道在极端复杂环境下服役安全所面临的共性问题,以管道失效的材料微观损伤机制为基础,提出了协同提升应对复杂环境的焊接接头综合性能的组织调控原理,创建了含缺陷管道服役寿命的精准预测理论,并形成标准,从而构建了材料-接头-结构一体化的长寿命高可靠性焊接结构设计、成形与评价理论及技术体系.Progress in research on the design and forming manufacturing of modern equipment structures is often challenged by extremely complex environments and requirements of long life and safe service.The weakest points of welded structures are the welded joints.This work proposes a collaborative microstructural control principle to improve the comprehensive performance of welded joints in complex environments by considering the characteristics of thermal power steam pipes,deep-sea oil and gas pipelines,and other energy equipment in the main line.Common problems related to the service safety of main pipelines in extremely complex environments are addressed by examining the material micro-damage mechanism of pipeline failure.Accurate life prediction theory for pipelines with defects is presented,and the corresponding standards are established.Finally,a long-life and high-reliability welded structure design,forming technology,evaluation theory,and technical system that integrates material joint structures is demonstrated.

关 键 词：长寿命 可靠性 焊接结构 成形制造 协同提升 

分 类 号：TG142.25[一般工业技术—材料科学与工程]