含铌微合金化热轧多相钢的控轧控冷工艺  

Study on Thermomechanical Controlled Processing of Hot Rolled Multiphase Steel Containing Nb

作　　者：郑东升[1] 朱伏先[1] 李艳梅[1] 

机构地区：[1]东北大学轧制技术及连轧自动化国家重点实验室,辽宁沈阳110004

出　　处：《钢铁研究学报》2010年第8期41-44,共4页Journal of Iron and Steel Research

基　　金：国家高技术研究发展计划(2001AA332020-01)

摘　　要：通过热轧试验研究了两阶段轧制+层流冷却、空冷、超快冷的TMCP工艺对高硅铌钢、高硅Nb-Ti钢、低硅Nb-Ti钢显微组织和力学性能的影响。结果表明,控轧控冷后的试验钢含有铁素体、贝氏体、马氏体以及少量残余奥氏体的混合组织。在控轧控冷工艺参数相近的情况下,高硅铌钢、高硅Nb-Ti钢、低硅Nb-Ti钢的抗拉强度依次减小,其伸长率和强塑积依次增大。低硅Nb-Ti钢的伸长率和强塑积分别达到了41%、25 256 MPa.%的最大值。Effect of thermomechanical controlled processing（TMCP）,including two-stage rolling and laminar cooling,air cooling and ultra-fast cooling,on microstructure and mechanical properties of high silicon Nb steel,high silicon Nb-Ti steel and low silicon Nb-Ti steel was investigated by hot rolling experiment.The results show that the mixed microstructure containing ferrite,bainite,martensite and a few retained austenite can be obtained by thermomechanical controlled processing.Under the condition of similar TMCP parameters,tensile strengths of high silicon Nb steel,high silicon Nb-Ti steel and low silicon Nb-Ti steel decrease in sequence,but total elongation and product of tensile strength and ductility increase in sequence.Total elongation and product of tensile strength and ductility reach the maximum values（41% and 25256 MPa·% respectively） for low silicon Nb-Ti steel.

关 键 词：铌微合金钢 热轧多相钢 控轧控冷工艺 

分 类 号：TG335.11[金属学及工艺—金属压力加工]