海洋石油平台用SM490YB热轧H型钢试制  

Trial Production of Hot Rolled H Beam SM490YB for Offshore Oil Platform

作　　者：惠治国[1] 赵美英[1] 杨静 谭晓东[1] Hui Zhi-guo;Zhao Mei-ying;Yang Jing;Tan Xiao-dong(Technical Center of Inner Mongolia Baotou Steel Union Co.,Ltd.,Baotou 014010,Inner Mongolia Autonomous Region,China)

机构地区：[1]内蒙古包钢钢联股份有限公司技术中心,内蒙古包头014010

出　　处：《包钢科技》2023年第4期68-72,共5页Science & Technology of Baotou Steel

摘　　要：根据日本标准JIS G 3106—2020《焊接结构用轧制钢材》对海洋石油平台用SM490YB热轧型钢的技术标准要求,结合钢厂生产线的工况特点,对SM490YB热轧H型钢的化学成分、加热及轧制工艺进行合理设计。采用Nb-V微合金化的试验钢屈服强度为412~420 MPa,抗拉强度为531~545 MPa,断后伸长率26%~29%,-20℃纵向冲击吸收功大于200 J,横向冲击吸收功大于110 J;试验钢室温显微组织为细小的铁素体+珠光体,铁素体晶粒度级别为8.5级。试验结果表明,采用Nb-V微合金化的H型钢具有良好的综合力学性能,试验钢的综合力学性能满足海洋石油平台用钢高强度、高韧性、耐低温、易焊接的要求。The chemical composition,heating and rolling processes of hot rolled beam SM490YB are reasonably designed according to the technical standard requirements of hot rolled H beam SM490YB for offshore oil platforms in the Japanese Standard JIS G 3106-2020“Rolled Steel for Welded Structures”combining with the characteristics of working conditions of production line in steel plant.The yield strength of the test steel with Nb-V microalloying is 412~420 MPa,tensile strength is 531~545 MPa,elongation after fracture is 26%~29%,longitudinal impact absorbing energy at-20℃is greater than 200 J and transverse impact absorbing energy is greater than 110 J;microstructure of the test steel at room temperature is fine ferrite+pearlite and grain size number of ferrite is 8.5.The test results showed that the H beam with Nb-V microalloying was with good comprehensive mechanical properties,which could meet the requirements of high strength and toughness,low temperature resistance and easy to be welded for the steel for offshore oil platforms.

关 键 词：高强度 SM490YB热轧H型钢 力学性能 

分 类 号：TG142.1[一般工业技术—材料科学与工程] TE95[金属学及工艺—金属材料]