第44卷第4期2023年8月Vol.44.No.4August2023特殊钢SPECIALSTEEL15CrMoG矩形坯保护渣优化实践张军卫，郝文权，颜昊，刘政鹏（青岛特殊钢铁有限公司工艺研究所，青岛266409）摘要：针对15CrMoG矩形坯出现的凹陷与纵向裂纹，设计了保护渣熔化温度、碱度、粘度等技术参数。将保护渣碱度由0.85调整到1.15，熔点由1132℃调整到1200℃，粘度由0.67Pa·s调整到1.4Pa·s，提高保护渣的析晶率，增大固态渣膜厚度，提高热阻，均匀稳定了传热；同时将保护渣熔速由70s优化到32s，控制振动参数，提高非正弦振动偏斜率，增大保护渣消耗量，改善润滑。通过保护渣理化指标和振动参数的优化，消除了铸坯表面凹陷与纵向裂纹。不良铸坯的精整处理比例大幅降低，减少了铸坯修磨工作量，提高了金属收得率。关键词：15CrMoG钢；凹陷；纵裂；保护渣DOI:10.20057/j.1003-8620.2022-00214中图分类号：TF703OptimizationPracticeof15CrMoGRectangularBilletProtectionSlagZhangJunwei，HaoWenquan，YanHao，LiuZhengpeng（TechnologyResearchInstituteofQingdaoSpecialIron&SteelCo.，LTD.，Qingdao266409，China）Abstract：Aimingatthesagsandlongitudinalcracksof15CrMoGrectangularbillet，themeltingtemperature，alkalinity，viscosityandothertechnicalparametersofprotectiveslagweredesigned.Byadjustingthealkalinityoftheprotectiveslagfrom0.85to1.15，themeltingpointfrom1132℃to1200℃，andtheviscosityfrom0.67Pa·sto1.4Pa·s，thecrystal⁃lizationrateoftheprotectiveslagwasincreased，thethicknessofsolid-stateslagfilmwasincreased，thethermalresis⁃tancewasimproved，andtheheattransferwasuniformlystabilized.Atthesametime，themeltingrateoftheslagwasopti⁃mizedfrom70sto32s，vibrationparameterswerecontrolled，non-sinusoidalvibrationbiasslopewasincreased，slagcon⁃sumptionwasincreased，andlubricationwasimproved.Thesurfacesagsandlongitudinalcracksofthebilletwereelimi⁃natedbyoptimizingthephysicochemicalparametersandvibrationparametersoftheslag.Theproportionofdefectivecast⁃ingbilletfinishingtreatmentwasgreatlyreduced，whichreducedthegrindingworkofcastingbilletandimprovedthemetalrecoveryrate.KeyWords：15CrMoGSteel；Sags；LongitudinalCracks；ProtectiveSlag青岛特殊钢铁有限公司1#连铸机生产15CrMoG钢...
