PHOSPHORUS SEGREGATION AND ANNEALING TEXTURE IN A LOW CARBON STEEL SHEETS

The present work is to study the effect of phosphorus on the anneal- ing texture of a low carbon steel at different cold rolling and annealing condition by means of pole-figure, inverse-pole figure and orientation distribution function (ODF) method. The microstructure and distribution of phosphorus in steel sheet are studied by means of metallography, scanning electron microscope (SEM) and electron probe microanalysis (EPMA). The results show that phosphorus promote the formation of the fiber texture of 001 parallel to the rolling direction and 111 normal to the sheet surface. The texture was found to be affected mainly by preannealing temperatures, promoted at 390℃ or 590℃, and retarded at 490℃. At the preannealing temperature promoting the formation of texture, phosphorus segre- gation to the interior of grains is observed. It seems that the formation of the fi- ber texture may be associated with the segregation of phosphorus.