The effects of adding Ti, P, Si, Mn to Fe-0.005C ultra-low carbon steel with isothermal annealing and continuous annealing treatment on tensile properties, texture and recrystallization behavior have been investigated. The adding of Ti(0.05%), Si(0.44%), Mn(0.80%), P(0.08%) to Fe-0.005C resulted in the increase of ultimate tensile strength from 30 to 43 Kg/㎟, but the elongation decreased from 50% to 35%.
Deformation texture of (100) [110] was generally developed by cold rolling, and the strongest texture of (100) [110] was appeared in the P-containg ultra-low carbon steel. However, continous annealing at high temperature above $Ar_3$ developed annealing textures of (111)[112] and (554)[225] during recrystallization.
Recrystallized volume fraction was measured and kinetic behavior has been analysed by Avrami equation. The parameter k and n were determined with alloying addition, and the activation energy were obtained for Arrhenius plot. The activation energy of alloy A(Fe-0.005C-0.05Ti-0.44Si-0.80Mn-0.08P), B(Fe-0.003C-0.05Ti-0.05P), C(Fe-0.003C-0.05Ti) at 50% volume fraction were 126, 97, 124 Kcal/mole, respectively.
