【摘要】 在工业试验条件下研究了低频旋转型电磁搅拌对奥氏体不锈钢及马氏体不锈钢连铸坯凝固组织的影响。结果表明:在低频电磁场合适的电磁搅拌参数作用下,不锈钢宏观组织及表面质量得到了明显改善,铸坯的柱状晶和等轴晶得到了显著的细化,消除了穿晶现象,中心缩孔、中心疏松明显降低;马氏体不锈钢铸坯中心等轴晶率平均达到了50%,最高达57%,中心疏松均在1.5级以下,中心缩孔90%在1.0级内。多次试验发现,不锈钢铸坯所需的搅拌强度应高于一般钢种。这为电磁搅拌在生产应用中工艺参数的优化及设计提供了一定的依据。更多还原

【Abstract】 Based on industrial experiments,the influence of low frequency rotary electromagnetic stirring(EMS) on solidification structure of austensitic and martensitic stainless steel in continuous casting was investigated.The results indicate that the excellent surface quality and good billet solidification structure of stainless steel can be obtained with appropriate electromagnetic stirring parameters by the application of low frequency electromagnetic field.Columnar grains and equiaxed grains are evidently refined and EMS can reduce center porosity,shrinkage cavity and cancel intracrystalline and improve equiaxed grains zone widens. the equiaxial crystals in the center of the billet of martensitic stainless steel comes up to 50% and even to the maximum of 57%,central porosity is below level 1.5 and more than 90% of the central shrinkage cavities belong to level 1.0 and below.Industrial trials show that the stirring intensity of stainless steel is higher than that of plain carbon steel.These offer reference for the optimization of processing parameter and design when using rotary electromagnetic stirrer.更多还原