总第328期2023年第4期HEBEIMETALLUＲGYTotalNo．3282023，Number43500mm炉卷轧机管线钢柔性轧制技术开发蔡茗宇(山东钢铁集团日照有限公司，山东日照276800)摘要:介绍了管线钢柔性轧制的工艺和关键技术。通过低碳设计，并采用Nb、Ti微合金化，设计了一种合理的、低成本的化学成分体系，结合大变形量卷轧+超快速冷工艺，充分利用位错强化、细晶强化、析出强化和相变强化等手段，以卷轧的方式使用一块板坯生产6～16mm厚度规格、母板长度达100～400m的X52、X56、X60、X65四个级别管线钢钢板。产品组织均匀，尺寸合适，各项力学性能指标满足GB/T14164～2103标准，落锤性能满足0～－30℃落锤剪切面积≥85%的低温止裂韧性要求。此技术的应用明显减少了余坯和余材数量，组坯更灵活，降低运营成本，满足各类用户的需求。关键词:管线钢;柔性轧制;微合金化;低碳;落锤性能;卷轧;超快冷中图分类号:TG335．6文献标志码:B文章编号:1006－5008(2023)04－0045－04doi:10．13630/j．cnki．13－1172．2023．0410DEVELOPMENTOFFLEXIBLEＲOLLINGTECHNOLOGYFOＲPIPELINESTEELIN3500mmFUＲNACECOILＲOLLINGMILLCaiMingyu(ShandongIronandSteelGroupＲizhaoCo．，Ltd．，Ｒizhao276800，Hebei)Abstract:Theprocessandkeytechnologiesofflexiblerollingofpipelinesteelareintroduced．Throughlow－carbondesign，andtheuseofNbandTimicroalloying，areasonableandlow－costchemicalcompositionsystemisdesigned，combinedwithlarge－deformationcoiling+ultra－fastcoldprocess，makingfulluseofdislocationstrengthening，finegrainstrengthening，precipitationstrengtheningandphasechangestrengthe-ning，etc．，usingaslabtoproduceX52，X56，X60，X65fourgradesofpipelinesteelplatewithathicknessspecificationof6～16mmandamotherplatelengthof100～400mintheformofcoiling．Theproducthasuniformstructure，suitablesize，variousmechanicalperformanceindicatorsmeetGB/T14164～2103standard，andthedropweightperformancemeetsthelowtemperaturecrackrelieftoughnessrequirementsof0～－30℃dropweightsheararea≥85%．Theapplicationofthistechnologysignificantlyreducesthenumberofblanksandleftovers，makesthepreformsmoreflexible，reducesoperatingcosts，andmeetstheneedsofvari-oususers．Keywords:pipelinesteel;flexiblerolling;microalloying;lowcarb...
