Effects of Microalloying with Lanthanum on Recrystallization of Cold Rolled Pure Copper

The pure copper ingots with different microalloying lanthanum (La) addition were cold rolled to a cumulative area reduction of 80% at room temperature and then subjected to various annealing treatments. The results show that the recrystallization of alloys was retarded at first and then promoted with increasing La concentration. It is noted that the recrystallization of alloys with a small amount of La was retarded. But, the recrystallization of alloys with a large amount of La was accelerated. In addition, the models of recrytallization kinetics of alloys were established to predict the recrystallisation degree of the deformed pure copper with different lanthanum addition during an isothermal annealing.