Starting from improving plasticity and reducing deformation resistance, we hope to increase the heating temperature of the metal as much as possible; However, in order to ensure product quality and avoid heating defects, the heating temperature is too high and bad. In order to reduce fire, save energy and improve labor productivity, we hope that not only the heating temperature is high, but also the temperature at the end of forging is low; However, in order to avoid forging cracks caused by severe work hardening, the forging temperature should not be too low. Therefore, these factors contradict and restrict each other. The forging temperature range of aluminum alloy forgings must be fully considered
The basic principle for determining the forging temperature range of aluminum alloy: the temperature interval between the metal forging start temperature and the forging end temperature is called the forging temperature range.
Basic principles for determining forging temperature range:
1. Ensure that the metal has good plasticity and low deformation resistance within the forging temperature range.
2. Ensure good quality of forgings (refer to internal structure and mechanical properties).
3. Try to expand the forging temperature range to reduce fire, save energy and improve forging productivity.
When considering the above principles, we should establish the concept of quality. First, we should ensure good blank heating, stainless steel forgings and good plasticity, reduce heating fires, improve labor productivity, and reduce heat loss.
Develop metal heating specifications
In order to achieve the goal of high quality, high output and low consumption, the relationship between furnace temperature or material temperature and time is specified at each stage of metal heating, namely heating specification. Blank temperature refers to the regulation of furnace temperature and blank temperature changing with time. For the convenience of use, the heating specification adopts the temperature change curve, usually the furnace temperature change curve (also known as the heating curve).
The basic principles for formulating metal heating specifications are high quality, high efficiency and low consumption. It is required that the billet will not produce heating defects (cracks, overheating, overheating, gasification, less decarburization), uniform temperature, short heating time, high production efficiency, fuel saving, etc. during the heating process.