Industry requirements for thermal correction of titanium plates

In order to make the thermal calibration successful, the appropriate heating temperature, holding time, and forming pressure must be selected. The pressure exerted on the parts during thermal calibration is sufficient as long as the parts can be pressed against the mold. No matter how large the pressure is, it will not have much effect on the branch shape but may lead to the shape of the mold and the workbench. Therefore, the main factors affecting the thermal correction effect are temperature and time, and temperature is the decisive factor. In order to eliminate spring back satisfactorily, only at a certain temperature. The so-called thermal specification is mainly to determine the calibration temperature and time. In summary, the appropriate thermal specification for forming a certain titanium plate must ensure that the part meets the following basic requirements after shape correction: Grade 12 Titanium Sheet

1. The parts are well molded and basically do not need manual trimming. The shape, size, and surface quality meet the inspection requirements of Gr5 Ti-6Al-4V Titanium Plate parts;

2. The mechanical properties of the material are basically stable, and the main performance indicators at room temperature and operating temperature meet the regulations;

3. The residual stress inside the part is basically eliminated;

4. The average hydrogen content of the material after thermal correction does not exceed the allowable value of 150p. p. m;

5. The total thickness of oxide skin and gas permeable layer shall not exceed half of the allowable negative deviation of sheet thickness;

6. There is no change in the metallographic structure of the material, and there is no obvious growth and overheating of the grains;

7. Under the premise of meeting the above requirements, the temperature should be as low as possible, the time should be as short as possible, and the pressure should be able to ensure that the parts can be pressed.