The basic heat treatment processes currently used in titanium and titanium alloys are stress relief annealing, full annealing and solid solution and aging treatment. Other processes, such as isothermal treatment, multi-stage annealing, and multi-stage aging, are rarely used in production.
1.Solution and aging treatment process
The solution treatment and aging treatment process is actually divided into two steps: solution treatment and aging treatment. Solution treatment is the operation of heating, holding and rapidly cooling titanium rods and titanium alloys to room temperature. Aging treatment is the operation of holding the workpiece for a certain period of time and then air-cooling it after the solution treatment. The purpose of solution treatment and aging treatment is to strengthen some a titanium alloy, β titanium alloy, a + β titanium alloy through heat treatment, and only increase the strength through annealing to further strengthen its mechanical properties.
2. Stress Relief Annealing Process
Stress-relief annealing is also called incomplete annealing. Its role is to eliminate or reduce the internal stress generated during the cold working process and prevent the chemical erosion and deformation of the workpiece under special circumstances.
3. Complete annealing process
The purpose of complete annealing of titanium and titanium alloys is to obtain a stable metal microstructure and improve physical properties, which is conducive to reprocessing and improve the stability of workpiece size and workpiece performance.
