The ER70S-6 welding wire steel produced by Tangsteel Long Product Division occurs brittle fracture during drawing due to high nitrogen content,various measures are taken in the respects of shrouded casting process im-provement,design optimization of long nozzle,tundish sealing,covering flux,submerged nozzle,mould powder in the continuous casting of welding wire steel,which improves the shrouded casting result during welding wire steel continu-ous casting,reduces the nitrogen content in welding wire steel by 0.001 2％in general,enhances the plasticity and de-formality,prevents the phenomena of poor metal fluidity and brittle fracture due to high nitrogen content in welding wire steel during drawing and fabricating.
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