【摘要】 某油田用抽油杆服役半年即发生失效断裂。从断口的宏微观形貌特征、显微组织、常规力学性能和化学成分等方面进行了分析 ,认为 ,材料化学成分不当、存在冶金缺陷及强度偏低等是造成该抽油杆发生早期疲劳断裂的主要原因更多还原

【Abstract】 The failed oil suck rods macro and micro fractograph, metallographic structure, mechanical properties, chemical composition were analysed. The results showed that the chemical compositions didn′t meet the specification; metallurgical defects and the lower strength of the material led to earlier fatigue fracture.更多还原