再结晶和相变的交互作用对双相钢组织特征的影响

来源期刊：钢铁2009年第9期

论文作者：张学辉 朱国辉 毛卫民

文章页码：86 - 89

关键词：双相钢； 两相区退火； 临界温度； 相变； 再结晶

Key words：dual phase steel； intercritical annealing； critical temperature； phase transformation and recrystallization

摘    要：系统地研究了不同的热处理工艺对双相钢组织特征的影响。研究的结果表明,存在一个临界两相区退火温度。当退火温度高于此临界退火温度,双相钢组织表现出带状铁素体的特征;而低于临界温度的退火可以得到典型的马氏体和铁素体等轴状组织的特征,这是由于冷轧钢板在两相区退火过程中的相变和再结晶过程交互作用的结果。当相变先于再结晶发生时会形成带状铁素体。预先的低温再结晶处理可以消除铁素体带状组织。

Abstract: Effect of thermal processing on microstructures in dual phase steels was systematically investigated.The experimental results illustrated that there exists a critical temperature during intercritical annealing in cold-rolled dual phase steels.Microstructure characterized by band-like ferrite was observed when the annealing temperature above the critical temperature,whereas typical dual-phase microstructure characterized by martensite dispersed around ferrite was observed.The experimental results were interpreted by interaction between recrystallization and phase transformation during intercritical annealing of cold-rolled dual phase steels.The band-like ferrite was formed because phase transformation occurred prior to recrystallization,which could be eliminated by pre-recrystallization at lower temperature.