【作者】 刘迎来；

【Author】 LIU Ying-lai (Tubular Goods Research Center of China National Petroleum Crop,Xi’an 710065,China)

【机构】 中国石油天然气总公司石油管材研究所；

【摘要】 通过宏观检查、断口微观分析、金相检验、化学成分分析及力学性能测定等手段对管道工程用三通的失效原因进行了分析。结果表明,该三通泄漏失效是由于产生于冷挤压成型中的裂纹在试压过程中发生失稳开裂所造成的。通过对同批21件产品进行综合质量评价,提出了处理对策；该对策被工程项目部采纳。更多还原

【Abstract】 All through macro inspection,gaps micro analysismetallography testing,chemical analysis and mechanical properties such as performance measurement tools were used for the pilot project in three-links lapse causes .The results show that the failure is due to a flaw of the three-links in cold extrusion process,which caused by the test pressure process.21 pieces of the same products through a comprehensive quality assessment made handling responses, and The approach is adopted by the projects.更多还原