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中文摘要：
基于在薄板坯连铸连轧流程Ti微合金化技术方面的大量工作，重点阐述了Ti微合金化钢的物理冶金学特征，内容包括Ti微合金化钢的析出特征、基体显微组织特征和强化机理．研究表明：Ti的析出贯穿于从连铸到卷取各工艺阶段；Ti含量小于0．045％时，随Ti含量增加，铁素体晶粒细化；Ti含量超过0．045％后，细化晶粒的作用不明显；Ti微合金化钢的强化机理主要是细晶强化和纳米尺度TiC的沉淀强化，其中后者是主要因素．
英文摘要：
The physical metallurgy for the titanium microalloyed strip produced by thin slab casting and rolling （TSCR） process, which includes the precipitation of Ti containing compounds, matrix microstructure and strengthening mechanism, was briefly reviewed. It is shown that the precipitation of Ti containing compounds occured at various stages from thin slab casting to coiling. The ferrite grain size is gradually refined by the addition of titanium, but will reach a limiting value when the titanium content is over 0.045%. Both the ferrite grain refinement and the nano-sized TiC precipitates can contribute to the increase in yield strength of the steel strip, and the latter is dominant when the titanium content is over 0.045%.
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