【摘要】 研究了电磁搅拌对管线钢埋弧焊缝的显微组织和化学成分不均匀性的影响，结果表明：电磁搅拌使尺寸在０．２～０．６μｍ之间的夹杂物数量增加，促进了奥氏体晶粒内针状铁素体的生成和细化，提高了熔敷金属的低温韧性．电磁搅拌使管线钢埋弧焊缝的层状偏析现象明显改善，成分分布趋于均匀，有利于提高焊缝金属的抗腐蚀性．更多还原

【Abstract】 Electromagnetic stirring increased the density of inclusions with 0.2-0.6μm diameter in pipe-line steel SAW deposited metal, promoted the formation and refining of acicular ferrite within austenite grains. The low temperature toughness of deposited metal was improved. In addition, electromagnetic Stirring reduced the lamellar segregation of deposited metals and the composition distribution tended to be homogenous.更多还原