理化检验-物理分册2024，Vol.60Issue(6)：28-33,6.DOI:10.11973/lhjy-wl230330
S32750双相不锈钢仪表管接头早期疲劳开裂原因
Causes of early fatigue cracking of S32750 duplex stainless steel instrument pipe joints
摘要
Abstract
Cracking occurred in the straight joint of S32750 duplex stainless steel instrument pipe on an offshore platform.The cracking reason of the instrument pipe joint was analyzed by means of macroscopic observation,fracture analysis,chemical composition analysis,hardness test,metallographic examination,scanning electron microscope and energy spectrum analysis.The results show that due to the damage defects on the surface of the joint and the brittleness of the material,under the action of alternating load,cracks initiated and propagated on the surface,resulting in early fatigue cracking of the joint.关键词
仪表管接头/开裂/热处理/裂纹萌生/显微组织/析出相Key words
instrument tube connector/cracking/heat treatment/crack initiation/microstructure/precipitated phase分类
能源科技引用本文复制引用
杨中娜,孙玉江,徐志刚,李希明..S32750双相不锈钢仪表管接头早期疲劳开裂原因[J].理化检验-物理分册,2024,60(6):28-33,6.基金项目
国家重点研发计划项目(2022YFC2806300) （2022YFC2806300）
