电磁搅拌对管线钢埋弧焊性能的影响  

EFFECTS OF ELECTROMAGNETIC STIRRING ON THE MICROSTRUCTURES AND CHEMICAL COMPOSITION NONUNIFORMITY OF PIPE-LINE STEEL SAW DEPOSITED METALS

作　　者：国旭明[1] 钱百年[1] 郑玉贵[1] 张艳[1] 李晶丽[1] 

机构地区：[1]中国科学院金属研究所金属腐蚀与防护国家重点实验室

出　　处：《材料研究学报》2001年第6期639-643,共5页Chinese Journal of Materials Research

基　　金：国家973计划资助项目G1998061511.

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．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.

关 键 词：电磁搅拌 针状铁素体 层状偏析 管线钢 埋弧焊 焊缝 显微组织 化学成份 均匀性 

分 类 号：TG457.6[金属学及工艺—焊接] TG445