摘要：CO2气保焊丝ER70S-6钢水中氮的饱和溶解度大于300×10-6,在冶炼过程中会发生自发吸氮反应。通过在转炉、出钢、LF精炼和连铸等冶炼工序中的工艺优化控制钢水中的氮含量。气保焊丝ER70S-6氮含量小于50×10-6合格率达到了100%,提高了焊丝钢的拉拔性能,满足用户要求。
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