What is the heat treatment process for titanium alloy plates?


Common heat treatment methods include annealing, solution treatment, and aging treatment. Annealing is aimed at eliminating internal stress, improving plasticity, and stabilizing the microstructure to achieve better overall performance. Generally, the annealing temperature for α alloys and (α+β) alloys is selected below 120-200℃ of the (α+β)→β phase transformation point; solution treatment and aging are performed by rapid cooling from the high-temperature zone to obtain martensitic α′ phase and metastable β phase, followed by holding in the medium temperature zone to allow these metastable phases to differentiate, resulting in fine dispersed second phase particles such as α phase or compounds, achieving the goal of strengthening the alloy. Typically, the quenching of (α+β) alloys is conducted at 40-100℃ below the (α+β)→β phase transformation point, while the quenching of metastable β alloys is performed at 40-80℃ above the (α+β)→β phase transformation point. The aging treatment temperature is generally 450-550℃.
 
In summary, the heat treatment process of titanium alloys can be categorized as follows:
(1) Stress relief annealing: The purpose is to eliminate or reduce the residual stress generated during processing. It prevents chemical corrosion in certain corrosive environments and reduces deformation.
(2) Full annealing: The aim is to achieve good toughness, improve processing performance, facilitate reprocessing, and enhance the stability of dimensions and microstructure.
(3) Solution treatment and aging: The goal is to increase strength. α titanium alloys and stable β titanium alloys cannot undergo strengthening heat treatment and are only annealed during production. α+β titanium alloys and metastable β titanium alloys containing a small amount of α phase can be further strengthened through solution treatment and aging.
In addition, to meet the special requirements of workpieces, two-layer annealing, isothermal annealing, β heat treatment, and deformation heat treatment are also used in industrial metal heat treatment processes.

More information

What are the five main characteristics of titanium plates?

Features: 1. The titanium seed plate has a surface oxide film that acts as a good, durable release agent, saving the use of release agents and making the peeling of the plates easier, eliminating the need for pre-treatment of the seed plates. The titanium seed plate is half the weight of the copper seed plate. 2. The lifespan of the titanium seed plate is more than three times that of the copper seed plate, and can reach 10 to 20 years depending on operating conditions. 3. The electrolytic copper produced using titanium seed plates has a dense crystalline structure, a smooth and flat surface, and high quality. 4. Since titanium seed plates do not require the application of release agents, they can avoid contamination of the copper electrolyte. 5. Increased production capacity reduces the production costs of electrolytic copper, resulting in better economic benefits.

What are the technical requirements for titanium pipes?

Titanium pipes are lightweight, have high strength, and excellent mechanical properties. They are widely used in heat exchange equipment, such as shell-and-tube heat exchangers, coil heat exchangers, serpentine tube heat exchangers, condensers, evaporators, and transport pipelines. Many nuclear power industries use titanium pipes as standard pipes for their units. Technical requirements: 1. The chemical composition of titanium and titanium alloy pipes should comply with the provisions of GB/T3620.1. When the buyer conducts re-inspection, the allowable deviation of the chemical composition from Mingkun Titanium Industry should comply with the provisions of GB/T3620.2. 2. The allowable deviation of the outer diameter of the pipe should comply with the specifications in Table 1. 3. The allowable deviation of the wall thickness of the pipe should not exceed its nominal wall.

What should be noted when filtering materials with titanium pipes?

Precautions: 1. If using titanium plate as a filtering material, it must not exceed its maximum working capacity. 2. When using titanium plates as filtering materials, be sure to prevent the plates from being bumped or scratched, and keep them clean to avoid contamination. 3. After using the titanium plate material, it must be cleaned and stored properly. 4. Before starting work, the titanium plate filtering material must be activated before adjusting to the normal working environment.