Relationship between Cold Rolling Degree and Annealing Time

Annealing time has a great influence on microhardness. When the temperature is low, the microhardness decreases with the extension of annealing time. When annealing at higher temperature, the microhardness increases with the annealing time.

1 and annealing time have great influence on plastic strain. When the annealing temperature is 7 10℃, the plastic strain first increases and then decreases with the extension of annealing time. When the annealing time is 45 seconds, it has good comprehensive mechanical properties, with plastic strain of 36% and tensile strength of 380MPa.