方坯含铌钢连铸工艺优化生产实践牛宏波董慧陈常义李法欣李长新(济钢第一炼钢厂)摘要：济钢第一炼钢厂方坯铸机生产HRB400等钢种以铌铁代替钒铁，试生产初期易出现铸坯横裂纹、横裂漏钢的情况，经多方面的生产工艺的优化，达到了优质批量生产的目标。关键词：方坯含铌钢横裂工艺优化ThetechnologyrenovationPracticeForbilletcontinuouscastingcontainstheniobiumsteelNiuHongboDongHuiChengChangyiLiFaxinLiChangxin(JigangNo.1SteelmakingPlant)Abstract：theNo.1steelmakingplantofJinanIronandsteelcorpbilletcontinuouscastingmachineproducescontainstheniobiumHRB400steeltoreplacethevanadiumironbytheferro-columbium,thetrialproductioninitialperiodtoappeartransversalcrack,thetransversecrackleaks,afterthevariousproductioncraftoptimization,hadachievedthevolumeproductioncontainstheniobiumsteellevel.Keywords：billetcontainstheniobiumsteeltechnologyrenovationtransversalcrack一、前言：2005年年底随着市场上钒铁价格的日益上涨，为降低生产成本，准备开发以铌铁代替钒铁的生产，但在方坯铸机生产含铌钢种初期频繁发生横裂漏钢事故，铸坯横裂缺陷严重..