What is the heat treatment method of titanium alloy?

The heat treatment methods of titanium alloy include annealing, solution treatment and aging treatment. Among them, annealing is to improve the plasticity and toughness of titanium alloy by heating and cooling; Solid solution treatment is to heat the alloy to the solid solution temperature, so that the solid solution elements in the alloy are dissolved into the solid solution to improve the strength and hardness of the alloy. Aging treatment is after the solution treatment, by controlling the time and temperature to promote the solute elements in the solid solution to further improve the strength and hardness of the alloy. When it comes to the heat treatment of titanium alloys, the commonly used methods include annealing, solution treatment and aging treatment. These methods are described in detail below:

Annealing:

Process: The titanium alloy is heated above its critical temperature, usually in the α+β range (usually between 700°C and 900°C), held for a period of time and then slowly cooled to room temperature.
Effect: By annealing, the stress of the alloy can be eliminated, and its plasticity and toughness can be improved. This process also helps to eliminate precipitates in the alloy, refine the grain structure, and improve the workability of the material.
Solution treatment:

Process: The titanium alloy is heated above its solid solution temperature, so that the solid solution elements in the alloy are dissolved into the solid solution, and then quickly cooled to room temperature.
Action: Solution treatment can enhance the strength and hardness of the alloy. In this process, the control of solution temperature and holding time is very important to ensure that the solution elements are fully dissolved and to avoid excessive solution or phase transition.
Aging treatment:

Process: After the solution treatment, the titanium alloy is heated to the appropriate aging temperature, and then quickly cooled to room temperature after a certain time.
Effect: Aging treatment by controlling the aging temperature and aging time, promote the solute elements in the solid solution precipitation, forming a dispersive distribution of the strengthening phase, so as to further improve the strength and hardness of the alloy. In addition, the aging treatment also helps to regulate the mechanical properties and stability of the alloy.
The selection and parameter control of these heat treatment methods depend on the composition, structure and desired final properties of the titanium alloy. Therefore, before heat treatment, it is necessary to carefully analyze the specific requirements of the material and select the appropriate heat treatment process according to the needs

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