连铸方坯表面裂纹的控制

315200510Vol131No15SteelWireProductsOctober2005(455004)30MnSi:,,106120m3/h,,,30MnSi87.74%99.59%;;ControlResearchofCrackontheSurfaceofContinuousCastingBilletQiXinxiaHuangZhong(AnyangIronandSteelGroupCo.,Ltd.455004)AbstractToanalyzethecauseforhorizontalcrackonthesurfaceof30MnSicontinuouscastingbillet.Optimizedprocessmeasuresareputforward:steel2makingusesBOF,drawingspeedofcontinuouscastingiscontrolledathigherlever,waterfluxofcrystalunitisincreasedto106120m3/handitsstructureisimprovedinordertoproducenon2defectcastingbillet.Qualitygoodsrateof30MnSiwirerodincreasesfrom87.74%to99.59%.Keywordscontinuouscastingbillet;horizontalcrack;processoptimized1100tLF150mm150mm30MnSi,,,111.130MnSi21.2,,,230MnSi20042330MnSi,,1.3,,,,,,,,©1994-2007ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(110130m3/h)1.4,,1.5456530MnSi452004130MnSi45,,2,30MnSi100t100t,2.130MnSi,,:(1),;(2)200kgCaO100kgCaF2,;(3),1200432005230MnSi130MnSi%CSiMnPS2004-03250.270.340.310.650.800.711.041.231.130.0140.0290.0190.0050.0280.0172005-02400.270.320.310.600.730.661.091.251.140.0100.0250.0160.0050.0190.0132.2,,,950,,,332.3,96108m3/h()6980m3/h()106120m/h,,0.9mm1.3mm,,900mm950mm,34,2.8m3.7m,334,12,,,3,,:4430MnSi,,30MnSi87.74%99.59%,(:2005-09-14)1964,1978,83©1994-2007ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.