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对M-EMS和M+F-EMS电磁搅拌作用下60Si2CrVAT弹簧钢铸坯的凝固组织进行了对比分析,从低倍组织、微观组织、碳偏析以及铸坯缺陷等方面入手分析,讨论了凝固末端电磁搅拌对铸坯凝固组织的影响。结果表明,凝固末端电磁搅拌可以显著改善60Si2CrVAT弹簧钢铸坯凝固组织,提高铸坯凝固组织的致密度,降低铸坯中心疏松和缩孔,而二次枝晶臂间距得到明显改善,中心等轴晶率明显提高,晶粒得到细化,从而显著地改善了铸坯的质量。
The microstructure of 60Si2CrVAT spring steel slab under M-EMS and M + F-EMS electromagnetic stirring was analyzed. The microstructure, microstructure, carbon segregation and slab defects were analyzed. Effect of Electromagnetic Stirring on Billet Solidification Structure. The results show that the electromagnetic stirring at the end of the solidification can significantly improve the solidification microstructure of the 60Si2CrVAT spring steel slab, increase the density of slab solidification structure, reduce the slab center porosity and shrinkage, while the secondary dendrite arm spacing is significantly improved, the center isometric The crystal rate is significantly increased, the grain refinement, which significantly improved the quality of the slab.