摘要
以低碳含磷钢为研究对象,通过分析不同卷取温度(600、650、700℃)时热轧态和冷轧退火态的显微组织、力学性能及退火再结晶动力学行为,对比研究了微铌(0.02%)处理和铌钛复合微合金化(0.02%Nb+0.012%Ti)对钢的组织和性能的影响。研究结果表明,与微铌处理钢相比,铌钛复合微合金化钢在600℃卷取时析出物数量更多,在更高温度卷取时熟化速度更快,650℃卷取时即熟化到一定程度。低温(600℃)卷取时,铌钛复合微合金化钢的退火再结晶更难,800℃×30 s连续退火可以保证完全再结晶。将温度继续升高至800℃以上,会导致强度下降,在一定程度上影响板卷之间的性能稳定性。
The effects of 0.02 %Nb＋0. 012 %Ti microalloying on the microstructure and properties of phosphorus-containing steel sheet are investigated by analyzing its microstructure and properties of as hot-rolled and as annealed as well as its recrystallization dynamic behavior during annealing under different coiling temperatures （600. 650. 700 ℃ separately）. The results showed that the precipitation of Nb＋ Ti microalloyed steel （0.02 %Nb＋0. 012 %Ti ）coiled at 600 ℃ was much more than the precipitation of Nb microalloyed steel（0.02 %Nb）, and easier to coarse when it was coiled at 650℃ and 700 ℃, the precipitation of Nb＋Ti microalloyed steel was coarse enough as coiled at 650 ℃. It was also found that Nb＋Ti microalloyed steel（0.02 %Nb ＋0.012 %Ti ） is more difficult to recrystallize when coiled at 600 ℃. Full recrystallization of Nb ＋ Ti microalloyed steel （0.02 %Nb ＋ 0. 012 %Ti ） will be completed as being annealed at 800 ℃ for 30 s, its strength will decrease as the annealing temperature increases.
出处
《钢铁研究》
CAS
2009年第3期14-19,共6页
Research on Iron and Steel
关键词
微合金化
含磷钢
Nb+Ti
显微组织
力学性能
microalloying
phosphorus-containing steel
Nb ＋ Ti
microstructure
mechanical property
