薄板坯连铸连轧流程钛微合金钢控制轧制技术

 重点阐述了薄板坯连铸连轧流程钛微合金钢的控制轧制模式及其机理。基于应力松弛试验和双道次压缩热模拟试验，研究分析了薄板坯连铸连轧钛微合金钢的奥氏体再结晶动力学。研究结果表明，轧前铸态粗大奥氏体组织经F1高温大压下后可实现完全静态再结晶；铸坯中固析TiN粒子可以有效阻止奥氏体再结晶晶粒的长大，实现再结晶区控轧。固溶钛的溶质拖曳作用以及形变诱导析出的TiC粒子对奥氏体再结晶具有抑制作用，可以阻止奥氏体再结晶的发生，实现未再结晶区控轧。

Control rolling technology of Ti-microalloyed strip produced by TSCR

The control rolling model and its mechanism of Ti-microalloyed strip produced by TSCR process in detail is ex-pounded. Based on stress relaxation test and thermal simulation experiment,the austenite recrystallization kinetics of Ti-microalloyed strip produced by TSCR process were discussed and studied. The results show that the recrystallization of the as-cast austenite with very large grains in Ti-microalloyed steel can be finished only after F1 rolling;Recrystallization controlled rolling can be achieved because the TiN precipitating from austenite has strong inhibition effect on the recrystal-lized grain growth. The inhibitory effect of Ti solute drag and deformation-induced precipitation TiC on austenite recrystal-lization can prevent the occurrence of austenite recrystallization,and realize non-recrystallization controlled rolling.