摘要
通过采用宏观检查、化学成分分析、金相组织分析、扫描电镜及能谱分析等多种技术手段,对一起非法改装钢质无缝气瓶的爆炸事故进行了失效分析。结果显示,事故原因主要包括,采用焊接方法对不允许施焊的高强钢37Mn无缝气瓶进行改造、环焊缝及接管角焊缝整周未焊透、存在非金属夹杂物等危害性焊接缺陷。改造后该气瓶用于挖掘机液压系统的高周疲劳载荷工况,最终导致气瓶爆炸。研究结果可为气瓶安全使用规范制定、非法改装监管及焊接工艺改进提供参考。
Through the application of multiple technical methods including macroscopic examination,chemical composition analysis,metallographic structure analysis,scanning electron microscopy,and energy dispersive spectroscopy analysis,afailure analysis was conducted on an explosion accident involving an lleglly modified seamless steel gas cylinder.The results indicate that the explosion is directly caused by the modification of a high-strength 37 Mn seamless steel gas cylinder using welding methods,which is prohibited for this material,as well as incomplete penetration along the circumference of the circumferential weld and the nozzle fllet weld,the presence of hazardous welding defects,such as non-metallic inclusions,and high-cycle fatigue loading conditions in the modified application of the gas cylinder within an excavator hydraulic system.The findings offer technical foundations for formulating gas cylinder safety regulations,enhancing supervision ofillegal modifications,and improving welding procedures.
作者
王恒
黄小宇
马中强
魏玉顺
WANG Heng;HUANG Xiaoyu;MA Zhongqiang;WEI Yushun(Tianjin Special Equipment Inspection Institute,Tianjin 300192,China)
出处
《石油化工设备》
2025年第5期74-79,共6页
Petro-Chemical Equipment
基金
天津市市场监督管理委员会科技计划项目(2023-W19)。
关键词
无缝气瓶
爆炸
焊接
37Mn钢
高周疲劳
焊接缺陷
seamless steel gas cylinder
explosion
welding
37Mn steel
high-cycle fatigue
welding defec
