Abstract
Texture, plastic anisotropy and earing behavior of 1.5%Si steels which have high strength and good elongation were studied. In the case of slow heating to intercritical temperature, (222) plane slowly increased by selective grain growth of retained ferrite to the temperature which occured the grain growth of recystallized ferrite. But in rapid heating selective grain growth of retained ferrite did not occured because grain growth of recrystallized ferrite was interfered by austenite. And in slow heating and slow cooling, transformation also occured by selective grain growth of retained ferrite. The effect of second phase on plastic strain ratio in multi-phase steel was calculated using Eshelby's tensor. As the difference of plastic strain ratio between matrix and second phase and the volume fraction of second phase increased, R-value of multi-phase steel decreased. On the contrary if the second phase was elongated to the thickness direction and the difference of plastic strain ratio between matrix and second phase was small, the plastic strain ratio of multiphase steel increased. Earing appeared at 45° direction in Cu added steel, but earing appeared at 0°, 90° in Cu not added steel.