- The temperature and time control are strictly required, and different heat treatment plans need to be formulated according to specific materials, including quenching, annealing, normalizing, etc.
- During the heat treatment process, reasonable coordination of heating and cooling speeds, ensuring temperature uniformity, and avoiding excessive oxidation, decarburization, and other phenomena are needed.
- After the heat treatment, microstructure analysis and mechanical property testing are needed to ensure the quality and reliability of the forgings.
Here is an actual production case:
Our company produces an aircraft engine interchanging joint forging, which uses high-strength titanium alloy TC4 material. To ensure its mechanical properties and durability, strict heat treatment process control is required.
Firstly, the billet heat treatment is adopted with a heating temperature of 1350℃~1380℃, holding for 20 minutes, and then quenched in water. Then the refined forging heat treatment is carried out with a heating temperature of 940℃~970℃, holding for 20~40 minutes, and then cooled by wind and air. Finally, the solution heat treatment is adopted with a heating temperature of 975℃~985℃, holding for 40 minutes, and quenched in water.
After such strict control, the microstructure of the aircraft forging is uniformly fine, with no obvious defects or oxidation phenomena, and the mechanical properties meet the design requirements.
