开发的1900 MPa Ti微合金化低合金超高强钢组织和性能  

Structure and Properties of Developed 1900 MPa Ti Microalloyed Ultra Low Alloy High-Strength Steel

作　　者：苏春霞 陈本文[1,2] 杨晰 李福坤[2] 高山 Su Chunxia;Chen Benwen;Yang Xi;Li Fukun;Gao Shan(State Key Laboratory of Metal Material for Marine Equipment and Application,Anshan 114009;Technology Center of Angang Steel Co Ltd,Anshan 114009)

机构地区：[1]海洋装备用金属材料及其应用国家重点实验室,鞍山114009 [2]鞍钢股份有限公司技术中心,鞍山114009

出　　处：《特殊钢》2021年第2期60-63,共4页Special Steel

基　　金：工信部2017年工业转型升级(中国制造2025)资金(部门预算)——重点新材料产业链技术能力提升:高性能结构钢项目资助。

摘　　要：通过200 kg真空感应炉和550 mm钢板轧机开发出1900 MPa Ti微合金化超级HSLA钢(/%:0.34C,0.70Si,1.50Mn,0.012P,0.004S,0.08 Ti,0.0020B,0.0040N)。结果表明:第一阶段采用奥氏体再结晶区轧制,开轧温度和终轧温度分别在1180℃和1030℃左右,第二阶段采用奥氏体未再结晶区轧制,开轧温度920~950℃,终轧温度850~890℃,热处理淬火温度(900±10)℃,回火温度200~230℃,钢板的析出相为(Ti,Mo)C,晶粒度10级,微观组织为回火马氏体,力学性能为Rm 1930~1985 MPa,A 10%~12.5%,-40℃K_(V2)200~230 J。The 1900 MPa Ti microallyed ultra HSLA steel(/%:0.34 C,0.70 Si,1.50 Mn,0.012 P,0.004 S,0.08 Ti,0.0020 B,0.0040 N)is developed by 200 kg vacuum induction furnace and 550 mm slab mill.The results show that with first stage starting and final rolling temperature respectively at 1180℃and 1030℃in austenite recrystallization zone,and with second stage starting rolling temperature at 920~950℃and final rolling temperature at 850~890℃in austenite nonrecrystallization zone,then quenching at(900±10)℃and tempering at 200~230℃,the plate precipitated phase is(Ti,Mo)C,the grain size rating is 10,the structure is tempered martensite,with the mechanical properties are Rm 1930~1985 MPa,A 10%~12.5%,-40℃K_(V2)200~230 J.

关 键 词：1900MPa级超高强钢 控制轧制 淬火加低温回火 析出相 力学性能 

分 类 号：TG142.1[一般工业技术—材料科学与工程]