摘要
Abstract
In this article, it analyzed the function to arc of axial and transverse magnetic field and the influence of external magnetic field on welding quality, introduced defects type and reason caused from external magnetic , such as gas pocket, inclusions and weld appearance. In order to reduce the influence of external magnetic field on SAWH pipe welding quality, it put forward to rearrange the welding cable line and the direction, after analysis on welding defects and interrupt samples in inside welding. After field test, the phenomenon of magnetic field in forming apparatus is too strong has been significantly improved, the arc magnetic blow weakened, and the iron oxide powder attached flux barrier, flux recycle tube, forming roll, delivery side and free edge groove obviously decrease.关键词
焊管/焊缝/磁场/气孔/夹杂Key words
welded pipe/weld/magnetic field/gas pocket/inclusion分类
矿业与冶金
