Influência do cobre na ductilidade a quente dos aços

Abstract

The influence of different additions of Cu and cooling rate on the hot ductility of steels have been examined, in the temperature range 750 a 950°C, at low strain rate of 2x10-3 s -1 . The effect of increasing Cu level has been found negligible to samples tested at high cooling rate. Samples tested to low cooling rate were more sensible to the Cu level variation, those having high Cu showing impairment in the hot ductility. Cu rich phases have been found in all testing conditions apart from a single one of low Cu and fast cooling rate where no Cu rich phases have been found. Those Cu rich phases apparently have little or no effect on the hot ductility of steels investigated.