Forging start temperature and forging end temperature, that is, the temperature interval between the initial forging temperature and the final forging temperature is called the forging temperature range. From improving the plasticity and reducing the deformation resistance, we hope to improve the heating temperature of the forgings as far as possible. But from the guarantee product quality, avoids the heating to produce the flaw, the heating temperature is too high and is not good. In order to reduce fire time, save energy and improve labor productivity, not only hope that the heating temperature is high, but also want to end the forging temperature lower, but in order to avoid serious processing hardening and lead to the formation of forging cracks, the temperature should not be too low.
This shows that these factors are contradictory, mutual constraints, so the determination of the temperature range of forging must be fully considered.
Basic principles for determining temperature range of forging:
1, ensure the forging billet in the forging temperature range has better plasticity and lower deformation resistance.
2, to ensure good quality (refers to the internal structure and mechanical properties) of forgings.
3, as far as possible to expand the range of forging temperature in order to reduce fire time, energy conservation, and improve the forging productivity. Forging enterprises in considering the above principles, to establish the idea of the first quality site, first of all to ensure that the billet heating good to ensure that forged high-quality forgings and good plasticity, while reducing heating fire times, improve labor productivity and reduce heat loss.