Abstract
Three α Cu-Si alloys containing 0.01% Fe, 0.15% Fe and 0.30% Fe, respectively, were rolled at room temperature and annealed at various temperatures. Hardness tests, microstructure observations and X-ray diffraction experiments were carried out to investigate the effect of iron on the annealing behavior of cold rolled Cu-Si alloys. The results may be summarized as follows:
(1) There was no difference in the hardening behavior among the three alloys when rolled.
(2) The addition of a small amount of iron greatly affected the annealing behavior, and had an effect to rise the recrystallization temperature. Recrystallization softening of Cu-Si-Fe alloys was rather gradual, while that of Cu-Si binary alloy was very abrupt.
(3) The breadth at the half maximum intensity of the (311) X-ray diffraction line decreased by annealing after cold rolling. This behavior was greatly affected by a small amount of iron.
