总第328期2023年第4期HEBEIMETALLURGYTotalNo.3282023,Number4HRB500E高强抗震钢筋的研发刘朋飞1,王阔2(1.秦皇岛佰工钢铁有限公司,河北秦皇岛066400;2.河钢集团唐钢公司,河北唐山063600)摘要:钢筋作为建筑构件的主要增强材料,要求具备较高的强度、韧性和优异的焊接性等综合性能。国内某钢铁公司根据自身轧钢工艺装备情况,采用钒微合金化控轧控冷技术生产HRB500E高强抗震钢筋。介绍了HRB500E高强钢筋的技术要求、化学成分设计和工艺路线,详细阐述了控轧控冷方案设计,并进行了工业试制,分析了化学成分、力学性能、显微组织等变化。结果表明,此次生产的钢筋具有较高的强度和塑形,实测强屈比≥1.35、屈屈比≤1.17、最大力总延伸率≥13.2%;应变时效性能良好;组织为铁素体+珠光体,晶粒度12~13级;P含量0.015%~0.040%,S含量0.017%~0.036%,满足GB/T1499.2-2018的要求。关键词:钒微合金化;HRB500E;抗震钢筋;控轧控冷;强屈比;延伸率;晶粒度中图分类号:TG335.6文献标志码:A文章编号:1006-5008(2023)04-0041-04doi:10.13630/j.cnki.13-1172.2023.0409RESEARCHANDDEVELOPMENTOFHRB500EHIGH-STRENGTHSEISMICSTEELBARLiuPengfei1,WangKuo2(1.QinhuangdaoBaigongIronandSteelCo.,Ltd.,Qinhuangdao066400,Hebei;2.HBISGroupTangsteelCompany,Tangshan063600,Hebei)Abstract:Asthemainreinforcingmaterialofbuildingcomponents,steelbarrequireshighstrength,tough-ness,andexcellentweldability.Accordingtoitsownrollingprocessequipment,adomesticsteelcompanyusesvanadiummicroalloy-controlledrollingandcoolingtechnologytoproduceHRB500Ehigh-strengthseismicsteelbar.Thetechnicalrequirements,chemicalcompositiondesignandprocessrouteofHRB500Ehigh-strengthsteelbarwereintroduced,thedesignofcontrolledrollingandcoolingschemewaselaboratedindetail,andindustrialtrialproductionwascarriedout,andthechangesofchemicalcomposition,mechanicalproperties,microstructureandotherpropertieswereanalyzed.Theresultsshowthatthesteelbarsproducedthistimehavehighstrengthandshape,andthemeasuredstrengthyieldratiois≥1.35,theyieldratiois≤1.17,andthetotalelongationofthemaximumforceis≥13.2%.Goodstrainagingperformance;thestruc-tureisferrite+pearlite...