The effects of hot rolling temperature and alloying elements
on the textures and r¯ values of cold rolled and annealed extra
low carbon steel sheets have been investigated. The steels
examined were one extra low carbon Al–killed steel and two Ti–IF
(Interstitial Free) steels with or without phosphorus. (200)
pole figures and relative intensities of various reflections from
the rolling plane were determined for hot bands and annealed
sheets. The hot rolled textures are found, when finish-rolled at
about 900°C, random regardless of the steels tested. when the
finish rolling temperature is lowered to the ferrite region temperature
of 750°C, however, the principal preferred orientation of
(100)[011] is developed. r¯ values of annealed sheets are decreased
with decreasing the finish rolling temperature. This could be
related to the presence of the stronger (100)[011] component,
which is originated from the texture inhomogeneity in the through
thickness direction of the hot bands at 750°C. The steel having
the lower r¯ value revealed the higher yield point elongation
which is closely related to the solute carbon content in the
steels. The major component of the recrystallization texture was
near {554}<225> irrespective of the steels tested, but the
intensity of (100)[011] component was increased with decreasing
the finish hot rolling temperature.
