The development of ultra-fine high performance low carbon bainitic structural steel

For the microalloyed low carbon steel, after the steel was hot deformed in the non-recrystallization temperature, the relaxation of the austenite effected the refinement of intermediate transformation phase. The phase transformation start temperatures rose with the relaxation time increasing. By refining the bainitic packet and controlling multi-intermediate transformation phases, the high performance ultra-fine low carbon bainitic steel has been developed.