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The main titanium material of titanium alloy TC4


Ordinary people usually talk about titanium and think that titanium is a single product, in fact, this cognition is inaccurate. Titanium is divided into pure titanium and titanium alloys.


TC4 is the main role of titanium alloy, and 60% of titanium is mainly TC4. The main composition of TC4 is Ti-6Al-4V, which belongs to (α+β) type titanium alloy and has good comprehensive mechanical and mechanical properties.


TC4 titanium alloy belongs to the national standard name, and different countries have different names.


TC4 titanium alloy is an α-β titanium alloy successfully developed by the United States in 1954, containing 6% α-stable element lv(aluminum) and 4% β-stable element V (vanadium). The nominal composition of TC4 titanium alloy has an aluminum equivalent of 6.0 and vanadium equivalent of 4.0, and the annealing state contains 10%-15%β phase.


The thermal conductivity of TC4 titanium alloy is 1/5 of iron and 1/10 of aluminum, and the thermal conductivity of TC4 l=7.955W/m·K.


The strength sb of TC4 titanium alloy reaches 1.012GPa, while its density g is 4.51g/cm3, making the ratio sb/g of strength to density reach 23.5. This value is much higher than the ratio of strength to density of alloy steel, showing its excellent strength and lightweight characteristics.


TC4 titanium alloy physical properties:


The production of TC4 (Ti-6Al-4V) alloy semi-finished products in the world accounts for more than half of the total production of various titanium alloy semi-finished products, more than 80% in the aerospace industry, TC4 titanium alloy main semi-finished forms are bars, forgings, sheets, thick plates, profiles and wire.


The main characteristics of TC4 titanium alloy are excellent comprehensive properties and good process properties. TC4 titanium alloy has moderate room temperature strength and high temperature strength, good creep resistance and thermal stability, high fatigue resistance and crack growth resistance in seawater, as well as satisfactory fracture toughness and thermal salt stress corrosion resistance, and its sensitivity to hydrogen is smaller than TC2 and TC1 alloys. It is suitable for manufacturing various parts working in a wide temperature range of -196~450 ° C, especially parts designed with the principle of damage tolerance limitation. TC4 titanium alloy also has excellent process plasticity and superplasticity, which is suitable for forming with various pressure processing methods, and welding and machining in various ways.


Application scenario of TC4 titanium alloy


Aerospace: TC4 titanium alloy is widely used in the aerospace field for the manufacture of aircraft, missiles, rockets and other components. Its high strength and low density make the aircraft lighter, improve fuel efficiency, and have good corrosion resistance and can adapt to harsh air environments.


Chemical field: TC4 titanium alloy is widely used in reactors, heat exchangers, storage tanks and other equipment in the chemical field. Its corrosion resistance can adapt to the erosion of various acids, alkalis and other chemical substances to ensure the safe operation of the equipment.


Automobile manufacturing: TC4 titanium alloy is used in automobile manufacturing engine parts, chassis components, etc. The high strength and low density of titanium alloy can reduce the body quality, improve the performance of the car, and has the characteristics of heat resistance and wear resistance, which can meet the requirements of the car in complex working conditions.


Sporting goods: TC4 titanium alloy is widely used in the field of sporting goods, such as golf clubs, bicycle frames and so on. Its high strength and excellent elastic properties can provide better batting power and shock absorption effect, while having corrosion resistance, suitable for outdoor environment use.


In short, TC4 titanium alloy has a wide range of application potential in aerospace, medical equipment, chemical industry, automobile manufacturing, sporting goods and other fields due to its excellent performance.