EFFECT OF COLD ROLLED REDUCTION ON THE TEXTURE AND PLASTIC STRAIN RATIO OF 2205 DUPLEX STAINLESS STEEL

摘要

The effect of cold rolled reduction, range from 52.4 % to 67 %, and annealing temperature from 1025 - 1100 °C on the annealing texture and plastic strain ratio of 2205 duplex stainless steel have been studied. The predominant 5 phase texture components in cold rolled state were {001 }<110> and {111}<112>. Both texture intensities increased with increasing cold rolled reduction and reached a maximum value at cold rolled reduction 61.9% and then became level off. The predominant y phase texture components in cold rolled state were {011}<311> and {112}<111>. The intensity of {011}<311> increased with increasing cold rolled reduction. After cold rolled sheet annealing, the predominant 5 phase texture components were {001}<110>, {011}<011>, and {111}<112>. The intensity of {001}<110> increased with increasing cold rolled reduction. The effect of temperature on texture was not obvious. The predominant y phase texture components after annealing were {011 }<311> and {113}<332>. Both intensities of {011}<3 11> and {113}<3 3 2> increased with increasing cold rolled reduction. Furthermore, the intensity of {113} <33 2> increased with increasing annealing temperature in the specimens with cold rolled reduction larger than 61.9%. After cold rolled sheet annealing, r value increased with increasing cold rolled reduction. However, r value decreased with annealing temperature and reached a minimum at 1075 °C. Besides, plane anisotropy absolute Ar value increases with increasing cold rolled reduction. Moreover, absolute Ar value increases with increasing annealing temperature in the specimens with cold rolled reduction less than 57%. Conversely, absolute Ar value decreases with increasing temperature and reached a minimum at 1075 °C in the specimen with 67% cold rolled reduction.