THE PHYSICAL METALLURGICAL CHARACTERISTICS OF THE TITANIUM MICROALLOYED STRIP PRODUCED BY THIN SLAB CASTING AND ROLLING PROCESS
薄板坯连铸连轧Ti微合金化钢的物理冶金学特征

The physical metallurgy for the titanium microalloyed strip produced by thin slab cast- ing 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%.