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.
出处
《钢铁研究学报》
CAS
CSCD
北大核心
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)
关键词
铌微合金钢
热轧多相钢
控轧控冷工艺
Nb-bearing microalloyed steel
hot rolled multiphase steel
thermomechanical controlled processing（TMCP）
