Detailed introduction about TC11 titanium tube

Chemical composition: The nominal composition of TC11 titanium alloy is Ti-6.5Al-3.5Mo-1.5Zr-0.3Si, which mainly includes titanium (Ti), aluminum (Al), molybdenum (Mo), zirconium (Zr) and silicon (Si) and other elements. The aluminum content ranges from 5.5% to 7.0%, the molybdenum content ranges from 2.8% to 3.8%, the zirconium content ranges from 0.8% to 2.0%, and the silicon content ranges from 0.2% to 0.35%.

Structural characteristics: It is a typical α+β titanium alloy, that is, there are both α phase and β phase in its microstructure. The α phase gives the alloy high strength and heat resistance, while the β phase can improve the plasticity and toughness of the alloy. The reasonable combination of the two gives TC11 titanium alloy good overall properties.

 

Composition and organizational characteristics

Chemical composition: The nominal composition of TC11 titanium alloy is Ti-6.5Al-3.5Mo-1.5Zr-0.3Si, which mainly includes titanium (Ti), aluminum (Al), molybdenum (Mo), zirconium (Zr) and silicon (Si) and other elements. The aluminum content ranges from 5.5% to 7.0%, the molybdenum content ranges from 2.8% to 3.8%, the zirconium content ranges from 0.8% to 2.0%, and the silicon content ranges from 0.2% to 0.35%.

Structural characteristics: It is a typical α+β titanium alloy, that is, there are both α phase and β phase in its microstructure. The α phase gives the alloy high strength and heat resistance, while the β phase can improve the plasticity and toughness of the alloy. The reasonable combination of the two gives TC11 titanium alloy good overall properties.

Performance characteristics

Mechanical properties

High strength: TC11 titanium tube has high room temperature strength, its tensile strength can usually reach more than 900MPa, and its yield strength can also reach more than 800MPa. It can withstand larger loads and can be used to manufacture parts with higher strength requirements.

Good toughness: While having high strength, it also has good toughness and is not prone to brittle fracture, which makes it have reliable performance when subjected to impact loads or complex stress states.

Excellent fatigue resistance: After appropriate heat treatment and processing, TC11 titanium tubes can show good fatigue resistance and can work stably for a long time under repeated loads, which prolongs the service life.

Heat resistance: It is a heat-strength titanium alloy with excellent heat-strength properties below 500°C, such as high-temperature strength, creep resistance, etc. Within this temperature range, the decrease in mechanical properties is relatively small, and it can meet the requirements for use in high-temperature environments. It is often used in the manufacturing of high-temperature components such as aerospace engines.

Corrosion resistance: It has good corrosion resistance to many corrosive media, including seawater, moist chlorine, oxidizing acids, etc. In these harsh corrosive environments, TC11 titanium tubes can maintain good chemical stability, reducing the risk of damage and failure due to corrosion.

Processing performance

Good thermal processing performance: pipes can be made by hot processing methods such as hot extrusion and hot rolling, and during the thermal processing process, their structure and properties can be effectively controlled and improved.

Good weldability: A variety of welding methods can be used for connection, such as argon arc welding, electron beam welding, etc. The strength of the welded joint can reach about 90% of the strength of the base metal, ensuring the reliability of the welded part.

The machining performance is acceptable: Although its strength is relatively high, various forms of machining can still be performed, such as turning, milling, drilling, etc., by reasonable selection of cutting tools and processing process parameters to meet different shape and size requirements.

 

Production process

Melting: Generally, advanced smelting technologies such as vacuum consumable arc melting or electron beam melting are used to ensure the uniformity and high purity of alloy components, reduce impurity content, and provide high-quality ingots for subsequent processing.

Forging: The smelted ingot is heated to a suitable temperature range, and is forged on a press. Through multiple upsetting, lengthening and other processes, the structure of the alloy is improved to make it more dense and uniform, which provides good conditions for pipe extrusion. of blank.

Extrusion: Heat the forged billet to a certain temperature, put it into the extrusion barrel of the extruder, and apply pressure through the extrusion rod to squeeze the billet out of the die hole of the die to form a pipe. The extrusion process can produce TC11 titanium tubes of various specifications and can achieve good dimensional accuracy and surface quality.

Heat treatment: According to specific application requirements, the extruded pipe is heat treated, such as annealing, to eliminate residual stress generated during processing, stabilize the structure and performance of the pipe, and improve its overall performance.

Application areas

Aerospace field: In aerospace engines, TC11 titanium tubes are often used to manufacture key components such as compressor discs, blades, and drums. These components work under high temperature, high pressure, and high speed conditions, and have extremely high requirements on material performance. The excellent properties of TC11 titanium alloy can meet these requirements and help improve engine performance and reliability.

Chemical industry: It can be used to manufacture pipelines and components of chemical reactors, distillation towers, crystallization equipment, mass transfer equipment, etc. It can resist the erosion of corrosive media in the chemical production process and ensure the safe and stable operation of the equipment.

Metallurgical industry: In metallurgical equipment, such as crushers and gear roller components, TC11 titanium tubes can use their high strength, high toughness and good wear resistance to improve the service life and work efficiency of the equipment.

Marine engineering field: Seawater is extremely corrosive. TC11 titanium tubes can be used to manufacture components for seawater desalination equipment, marine aquaculture equipment, and submarine pipelines. They can effectively resist seawater erosion, extend the service life of equipment, and reduce maintenance costs. .