冷挤压无缝等径三通泄漏原因探究

摘要

通过宏观检查、荧光磁粉探伤、化学成分分析、金相检验、断口分析及能谱分析等方法对DN50 无缝等径三通开裂泄漏原因进行分析.结果表明,该三通在冷挤压成型制造过程中内壁产生裂纹,在后续水压试验过程裂纹扩展穿透整个壁厚,从而导致泄漏.%Through macroscopic examination,fluorescent magnetic detection,chemical analysis,metallographic examination,fracture analysis and EDS method for DN50 seamless straight tee crack leakage reasons were analyzed,results showed that the tee in cold extrusion cracks formed on the inner wall of the manufacturing process,in the subsequent hydrostatic testing process of crack propagation through the wall thickness,resulted leakage.