油管联接螺纹失效综合分析

A comprehensive analysis on the failure of the screw threads connecting the oil tubes

对失效油管的螺纹几何尺寸、管材化学成分、常温力学性能和金相组织的检查进行了分析 。

The screw threads of the oil tubes that fail to work properly were inspected for macroscopic items, their geometric dimensions and mechanical properties at normal temperature. Their chemical compositions and metallography were also examined. The reasons involved in the failure of screw threads were discovered in consequence.