理化检验-物理分册2024，Vol.60Issue(8)：36-40,5.DOI:10.11973/lhjy-wl230270
合成氨企业管道弯头环向断裂原因
Causes of circumferential fracture of pipeline elbow in synthetic ammonia enterprise
摘要
Abstract
Instantaneous circumferential fracture occurred in a section of elbow in a high-pressure pipeline of a synthetic ammonia enterprise.The causes of elbow fracture were analyzed by means of macroscopic observation,chemical composition analysis,scanning electron microscope and energy spectrum analysis,mechanical property test,low-magnification test and metallographic examination.The results show that the nitrogen content of the elbow was high,and the correct heat treatment was not carried out after cold bending,which caused strain aging embrittlement and work hardening.At the same time,the existence of ring loose,banded structure and widmanstatten structure in the material further reduced the mechanical properties of the elbow.Under the action of a certain impact force,the elbow underwent brittle fracture.关键词
弯头/应变时效/脆化和加工硬化/脆性断裂/疏松/显微组织Key words
elbow/strain aging/embrittlement and work hardening/brittle fracture/loose/microstructure分类
通用工业技术引用本文复制引用
张新占,孙明华,张道福,臧伟,乔广通,亓海滨..合成氨企业管道弯头环向断裂原因[J].理化检验-物理分册,2024,60(8):36-40,5.基金项目
中央引导地方科技发展专项资金项目(YDZX2022016) （YDZX2022016）
山东省科技型中小企业创新能力提升工程项目(2023TSGC0806) （2023TSGC0806）
