1、 Chemical composition of TC4 titanium alloy
TC4 titanium alloy is a titanium alloy mainly composed of titanium, aluminum, and vanadium. The specific chemical composition is as follows:
Titanium (Ti): about 89-91%
Aluminum (Al): 6%
Vanadium (V): 4%
Oxygen (O): ≤ 0.20%
Iron (Fe): ≤ 0.30%
Carbon (C): ≤ 0.10%
Hydrogen (H): ≤ 0.015%
Nitrogen (N): ≤ 0.05%
This combination of components endows TC4 titanium alloy with unique physical and mechanical properties, making it widely used in aerospace, chemical, and biomedical fields.
2、 Physical properties of TC4 titanium alloy
The physical properties of TC4 titanium alloy include:
Density: 4.43 g/cm ³
Melting point: 1660 ° C
Thermal conductivity: 7.2 W/m · K
Specific heat capacity: 0.52 J/g · K
These characteristics enable TC4 titanium alloy to exhibit excellent performance in both high and low temperature environments.
3、 Mechanical properties of TC4 titanium alloy
Tensile strength: 895-930 MPa
Yield strength: 825-860 MPa
Elongation rate: 10-15%
Elastic modulus: 110 GPa
These mechanical performance parameters enable TC4 titanium alloy to have good durability under high stress and deformation conditions.
4、 Heat treatment process of TC4 titanium alloy
1. Annealing treatment
Annealing treatment is commonly used in the production process of TC4 titanium alloy to improve the material's ductility and toughness. The typical annealing process is as follows:
Temperature range: 700-800 ° C
Insulation time: 1-2 hours
Cooling method: air cooling or furnace cooling
The TC4 titanium alloy after annealing treatment has good plasticity and toughness, which is suitable for subsequent processing and forming.
2. Solid solution treatment
Solution treatment can improve the strength and hardness of TC4 titanium alloy. The specific process is as follows:
Temperature range: 930-970 ° C
Insulation time: 1-2 hours
Cooling method: water quenching or air cooling
After solid solution treatment, the grain size of TC4 titanium alloy is refined and the mechanical properties are significantly improved.
3. Timeliness processing
Aging treatment is used to further improve the strength of TC4 titanium alloy after solution treatment. The process parameters are as follows:
Temperature range: 480-520 ° C
Insulation time: 8-12 hours
Cooling method: air cooling
After aging treatment, the precipitated phase of TC4 titanium alloy is strengthened, significantly improving its tensile strength and yield strength.
5、 The Effect of Heat Treatment on the Properties of TC4 Titanium Alloy
The different heat treatment processes have a significant impact on the properties of TC4 titanium alloy. For example:
Annealing treatment can reduce the hardness of materials, increase their toughness and ductility, and is suitable for subsequent mechanical processing and forming.
Solution treatment and aging treatment are mainly used to improve the strength and hardness of materials, enabling them to have better performance in high stress environments.
According to specific application requirements, selecting the appropriate heat treatment process can optimize the performance of TC4 titanium alloy and meet the usage requirements under different working conditions.
6、 Application fields of TC4 titanium alloy
Due to its excellent performance, TC4 titanium alloy is widely used in multiple fields:
Aerospace: Used to manufacture structural components and engine parts for aircraft and spacecraft.
Medical devices: used for making artificial joints, dental implants, etc.
Chemical equipment: exhibits excellent corrosion resistance in corrosive environments.
7、 Research and Development of TC4 Titanium Alloy
With the advancement of technology, research on TC4 titanium alloy continues to deepen. The current research directions include:
The relationship between microstructure and properties: Through microscopic analysis methods, the influence of microstructure of TC4 titanium alloy on its macroscopic properties is studied.
New heat treatment process: Develop more efficient heat treatment processes to further enhance the comprehensive performance of TC4 titanium alloy.
Application Expansion: Explore the potential applications of TC4 titanium alloy in various fields, such as the automotive industry and sports equipment.