连铸坯振痕形成机理及电磁控制技术.pdf

连铸坯振痕形成机理及电磁控制技术· 金小礼，雷作胜，任忠呜，邓康，钟云波 (上海大学，上海市钢铁冶金新技术应用开发重点实验室，上海200072) 摘要综述了连铸中振痕形成机理及其控制技术，提出了一种新的振痕形成机理，认为连铸过程 中结晶器振动导致初始凝固坯壳的“温度波动”是铸坯表面振痕形成的一个重要原因。为减轻振痕， 改善连铸坯表面质量，提出了两种电磁连铸新技术：调幅磁场耦合结晶器振动的电磁连铸技术和调 幅磁场下无结晶器振动的电磁连铸技术。 关键词 电磁连铸 振痕温度波动 高频调幅磁场 MechanismofOscillationMarkFormation of and Development for Control ContinuousStrand Technology Casting JIN Yunbo Xiaoli,LEl Zuosheng．RENZhongming,DENGKang,ZHONG Enhanced of ShanghaiUniversity,ShanghaiLaboratoryFerro—Metallurgy,Shanghai200072，China AbstractTheoscillationmarksformationmechanismsanditscontrol incontinuous technologies casting are newmechanismWaSintroducedinwhichthe of overviewed．Specially,a temperaturefluctuationearly solidifiedshellcausedmould isa factor．InordertOdecreasethe ofoscillation by reciprocationkey depth thesurface ofcontinuous kindsofnovel marks，andimprove quality caStingstrands，two wereintroduced kind Continuous a of Casting(EMCC)technologiesbyapplying special isnamedasmoldoscillationwithAMMF Field(AMMF)，one Amplitude—ModulatedMagnetic coupled andtheotheris EMCC namedasMouldOscillation—less Continuous Electromagnetic underAMME wordsoscillation co