回流夹杂是电焊钢管焊缝区出现较多的一种缺陷。本文通过力学、金相及电子光学等试验方法,观察、试验、分析了回流夹杂的成因、形貌、成份及对性能的影响等。含有回流夹杂的压扁试样极易开裂,其断口分大变形区、空洞区(未变形区)和塞满了回流夹杂的窄缝区三部分。回流夹杂是由于焊接时输入热量过高造成的,要降低回流夹杂,必需建立焊接输入热量自动控制系统。 Reflux inclusions welded steel pipe weld zone appears more of a defect. In this paper, through mechanics, metallography and electronic optics and other test methods, observation, test, analysis of the causes of back-flow inclusions, morphology, composition and performance impact. Compacted samples containing reflow inclusions easily cracked, the fracture points large deformation area, the hollow area (undeformed zone) and filled with the backflow mixed narrow zone three parts. Reflux Inclusion is due to the welding heat input is too high, to reduce the inclusion of reflux, the welding heat input to establish an automatic control system.