32宝钢技术2024年第5期
倒角结晶器铜板镀层崩边原因分析及控制
钱，黄帼
都胜朝,刘贝,徐本桥,石和乾,沈
（武汉钢铁有限公司，湖北武汉430080）
摘要：针对倒角结晶器窄面铜板镀层崩边问题，从结晶器传热、铜板结构、镀层性能等角度
分析原因，提出采用激光熔覆技术对铜板表面进行强化的解决方案，并开展了工业试验进行验
证。研究结果表明：铜板角部温度高、镀层厚度大、镀层与铜板热变形差异大、在线调宽状态下
铜板侧面清渣不彻底是影响镀层发生崩边的重要原因。采用激光熔覆技术后，倒角窄面铜板
的过钢量由5万t提高到10万t以上，当过钢量达到8.7万t时，熔覆层仍未出现角部崩边、
剥落及因磨损过大引起的局部露铜现象。
关键词：倒角结晶器；镀层崩边；激光熔覆；铜板表面强化
中图分类号：TF341.6文献标志码：B
doi:10.3969/j.issn.1008-0716.2024.05.006
Analysisandcontrolofedgecollapseincopperplatecoatingofthechamferedmould
DUShengchao,LIUBei,XUBenqiao,SHIHeqian,SHENQianandHUANGGuo
(WuhanIronSteelCo.,Ltd.,Wuhan430080,Hubei,China)
Abstract:Aimingattheproblemofedgecollapseincopperplatecoatingonnarrowsurfaceof
thechamferedmould,thecauseswereanalyzedfromtheaspectsofmoldheattransfer,copperplate
structureandcoatingperformance.Asolutionwasproposedtostrengthencopperplatesurfaceusing
lasercladdingtechnology,whichwasverifiedbyindustrialtests.Theresultsindicatethathigh
temperaturesatthecornersofthecopperplate,largecoatingthickness,significantdfferenceof
thermaldeformationbetweencoatingandthecopperplate,andincompletecleaningofcopperplate
sideunderon-linewidthadjustmentarethemainreasonsfortheoccurrenceofedgecollapseof
coating.Afteradoptinglasercladdingtechnology,thesteelpassingvolumeofthechamferednarrow
surfacecopperplateincreasedfrom50000ttoover100000t.Whenitreached87000t,the
claddinglayerstilldidnotappearissueswithcorneredgecollapse,spallingorlocalcopperexposure
causedbyexcessivewear.
Keywords:chamferedmould;edgecollapseofcoati