碱性介质中旋塞阀磨损失效分析  

Failure Analysis on Wear of Stopcock in Alkali Solution

作　　者：邱艳丽[1] 杨振国[1] 

机构地区：[1]复旦大学材料科学系,上海200433

出　　处：《材料工程》2008年第6期60-63,共4页Journal of Materials Engineering

摘　　要：采用金相显微镜和扫描电镜对在碱性介质中发生泄漏的不锈钢旋塞阀进行了宏微观形貌和金相组织分析;并采用光电直读光谱仪、EDS、红外碳硫分析仪和NHO分析仪对旋塞阀材质和表面沉积物进行了系统的表征分析。结果表明旋塞阀的失效模式为腐蚀磨损和磨粒磨损。阀门塞子材质与设计规定不符以及塞子材料抗腐蚀性能降低是旋塞阀泄漏的主要原因。提出了解决问题的相应对策,为防止类似事故的再次发生提供了技术依据。The macro appearance, morphology and metallographic structure of plug valve made of stainless steel and leaked in alkali solution were observed by metallurgical microscope and Scanning Electron Microscope（SEM）. Also, photoelectric direct reading spectrometer, Energy Dispersive Spectrometer（EDS）, carbon and sulfur analyzer and NHO-analyzer were used to analyze chemical composition of materials and substances deposited on sealing area. The results showed that the failure of stopcock was corrosive wear and abrasive wear. The main cause leak of stopcock was that the selected plug material was not in accordance with the design and thus reduced properties of its anti-corrosion. Moreover, countermeasures for solving the problem have been tentatively put forward,and the analysis results provided the technological support to prevent the same accident.

关 键 词：旋塞阀 失效分析 腐蚀磨损 磨粒磨损 

分 类 号：TE921[石油与天然气工程—石油机械设备]