文章编号：1671-7872(2023)02-0119-07电渣重熔过程电源频率对不锈钢凝固组织的影响苏云龙，朱春丽，金涛，赵磊，张龙飞，常立忠，施晓芳(安徽工业大学冶金工程学院，安徽马鞍山243032)摘要：以304奥氏体不锈钢为研究对象，基于自行设计的低频电源电渣炉对其进行电渣重熔实验，采用原位分析技术分析电源频率对电渣锭致密度和Cr元素分布的影响，研究低频电渣重熔对电渣锭凝固组织的影响及其作用机理。结果表明：低频操作可使电渣锭致密度分布更均匀，但不是频率越低越好，频率降至0.1Hz时致密度分布的不均匀性反而增加；频率对电渣锭中Cr元素的最大偏析度影响较小；随频率的降低温度梯度与竖直方向的夹角逐渐减小，金属熔池深度变浅。频率降至0.4Hz时，温度梯度与竖直方向的夹角最小、约20°，柱状晶接近于轴向生长，熔池深度最浅，呈浅平状分布；频率降至0.1Hz时，柱状晶径向生长的趋势增加，熔池深度反而加深。与传统工频电渣重熔相比，合理的重熔频率能够更好地搅拌渣池，促使渣–金界面与熔池内各部分温度分布更均匀，降低金属熔池深度，但频率过低反而会加深金属熔池深度。关键词：电渣重熔；低频电源；致密度；凝固组织；偏析中图分类号：TF142文献标志码：Adoi：10.12415/j.issn.1671−7872.22159InfluenceofPowerFrequencyonSolidificationStructureofStainlessSteelDuringElectroslagRemeltingProcessSUYunlong,ZHUChunli,JINTao,ZHAOLei,ZHANGLongfei,CHANGLizhong,SHIXiaofang(SchoolofMetallurgicalEngineering,AnhuiUniversityofTechnology,Maanshan243032,China)Abstract：Using304austeniticstainlesssteelastheresearchobject,theelectroslagremeltingexperimentwascarriedoutbasedontheself-designedlow-frequencypowerelectroslagfurnace.TheinfluenceofpowerfrequencyonelectroslagingotdensityandCrelementdistributionwasanalyzedbyusingthein-situanalysistechnology,andtheinfluenceoflowfrequencyelectroslagremeltingonelectroslagingotsolidificationstructureanditsmechanismwerestudied.Theresultsshowthatthelowfrequencyoperationcanmakethedensitydistributionoftheelectroslagingotmoreuniform,butnotthelowerthefrequencyis,thebetter.Whenthefrequencydropsto0.1Hz,thenon-uniformityofdensitydistributionincreases.ThefrequencyhaslittleeffectonthemaximumsegregationofCrelementintheelectroslagingot.Withthe...
