过火后SPV490Q母材及焊接接头冲击韧性研究  

Experimental Research on Impact Toughness Changes of Base Material and Weld Joint of SPV490Q after Fire

作　　者：周杨飞 叶伟文 肖超波 曹建群 

机构地区：[1]广州市特种承压设备检测研究院,广东广州510100

出　　处：《石油化工设备》2011年第4期1-4,共4页Petro-Chemical Equipment

基　　金：国家863计划赞助项目(2006AA04Z439);国家十一五科技支撑计划赞助项目(2006BKA02B02)

摘　　要：过火后SPV490Q母材及其焊接接头的冲击韧性变化对于过火后大型原油储罐的安全评定有重要影响。采用热处理的方式模拟了储罐的火灾过程,利用冲击试验的方法得到了不同受热温度和恒温时间对于材料冲击韧性的影响程度,得到了经历不同高温后SPV490Q母材及焊接接头的冲击韧性及其变化规律;并采用了显微组织观察方法,观察其组织的变化情况。试验表明,随着受热温度的升高,母材及焊接接头的冲击韧性下降明显,但恒温时间对冲击韧性的影响不大。The impact toughness change is the key factors for evaluating the damage due to flame impingement and the radiant heat of a fire.Considering the related factors as heating temperature and fire exposure time,the fire process was simulated by the heat treatment,and influence of the important parameters including heating temperature and fire exposure time on the impact toughness was tested.The relationship between impact toughness change and heating temperature and the rule of metallurgical structure of base material and weld joint of SPV490Q were obtained.The results show that impact toughness tends to decrease obviously with the increase of heating temperature.However,with the increase of fire exposure time,the impact toughness of the SPV490Q steel is hardly influenced.

关 键 词：储罐 过火后 SPV490Q 冲击韧性 

分 类 号：TE965[石油与天然气工程—石油机械设备] TQ050.2[化学工程]