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电磁搅拌对管线钢埋弧焊性能的影响

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Abstract:

？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.

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