Abstract
The effects of working temperature and of subsequent annealing on the mechanical properties have been investigated for mild steel. The specimens were deformed at temperatures between 100° and 700°C, and then their hardness, static tensile properties and impact values were measured at the room temperature
The maximum work-hardening effect was observed at temperatures of the bluing region, and the higher the working temperature the higher the impact value.
The specimens cold-worked at temperatures below about 400°C were still more hardened and strengthened by subsequent low temperature annealing, and maximum strength and hardness were obtained by cold-working at 350°C and then annealing at 350°C for 30min.
