内置式除氧器焊缝缺陷安全评定  

Safe Assessment to Weld Defects of Built-in Type Deaerator

作　　者：张艳飞[1] 王立新[1] 王英军[1] 

机构地区：[1]内蒙古电力科学研究院,内蒙古呼和浩特010020

出　　处：《内蒙古电力技术》2012年第1期96-99,102,共5页Inner Mongolia Electric Power

摘　　要：针对内蒙古某电厂材质为16MnR的内置式除氧器纵焊缝夹渣缺陷,以16MnR的拉伸性能、弹性模量、断裂韧度以及疲劳裂纹的扩展速率等相关数据为基础,依据英国标准BS7910,结合有限元应力分析方法,对其焊缝夹渣缺陷进行了安全评定、疲劳评定,并与依据国家标准GB/T 19624—2004计算的结果进行了比较,结果表明该容器焊缝夹渣缺陷不会影响机组安全稳定运行。In accordance with longitudinal weld defects to 16MnR steel built-in type deaerator at certain power plant in Inner Mongolia,based on relevant parameters to dilation rate of orevein on tensile property,elastic modulus,fracture toughness,fatigue crack of 16MnR steel,on basis of British Standard BS7910,in combination with Finite Element Analysis（FEA）,safe assessment and fatigue evaluation to its slag inclusion defect have been implemented,and comparation with results calculated on basis of national standard GB/T 19624—2004 shows that slag inclusion exists in this vessel will not influence safety and stability operating of units.

关 键 词：除氧器 焊缝缺陷 有限元分析 等效裂纹 安全评定 疲劳评定 载荷比率 断裂比率 

分 类 号：TG441.7[金属学及工艺—焊接]