间歇式变向复合电磁搅拌作用下60Si2CrVAT钢的凝固组织  

Solidification Structure of 60Si2CrVAT Spring Steel Blooms Cast With Intermittently Reversing Direction Complex Electro-Magnetic Stirring

作　　者：杜卫东[1] 王凯[2] 蒋明伟[1] 翟启杰[1] 赵沛[3] 

机构地区：[1]上海大学材料科学与工程学院,上海200072 [2]宝山钢铁股份有限公司特殊钢分公司,上海200940 [3]钢铁研究总院,北京100081

出　　处：《钢铁》2007年第11期27-30,共4页Iron and Steel

基　　金：国家重点基础研究发展规划项目(2004CB619107)

摘　　要：研究了间歇式变向复合电磁搅拌作用下60Si2CrVAT弹簧钢连铸坯的凝固组织。结果表明,间歇式变向复合电磁搅拌工艺可以显著减少60Si2CrVAT弹簧钢铸坯断面中心疏松和缩孔,提高铸坯凝固组织的致密度。铸坯中二次枝晶臂间距为30-250μm,中心等轴区由铸坯断面面积的19.6%增加到25%,铸坯内部质量得到了极大的改善。The effect of complex electro-magnetic stirring on solidification structure of spring steel 60Si2CrVAT blooms was investigated. The results revealed that, with electro-magnetic stirring, center shrinkage cavity and porosity were significantly reduced. The spacing of secondary dendritic arms was in the range of 30-250μm,the percentage of equiaxed zone was increased from 19.60/6 to 25 % and the quality of blooms was significantly improved.

关 键 词：间歇式变向 复合电磁搅拌 60Si2CrVAT弹簧钢 凝固组织 

分 类 号：TG244.3[金属学及工艺—铸造]