Failure Analysis of the Elbow of the Liquid Phase Collection Pipe From the Outlet of the Closed Discharge Pump to the Section Capture
Using high-precision equipment such as scanning electron microscopy(SEM),direct reading spectrometer(OES),X-ray energy spectrum analyzer(EDS),and digital Vickers hardness tester,failure analysis was carried out on the elbow of the oil field closed discharge pump outlet to the section capture liquid phase manifold.The following projects were completed:chemical composition analysis,Vickers hardness testing,inclusion testing,metallographic structure inspection,phase proportion analysis,microscopic morphology analysis,and EDS micro area composition analysis.The results indicate that the failure mechanisms of the crack at the elbow position and the weld position are both high cycle fatigue cracking,and the mechanical factors of high cycle fatigue at both locations are related to the vibration stress generated by the closed discharge pump.
万方数据
维普
