I. Composition and Organization Characteristics
Chemical composition: The nominal composition of TC11 titanium alloy is Ti-6.5Al-3.5Mo-1.5Zr-0.3Si, which mainly contains titanium (Ti), aluminum (Al), molybdenum (Mo), zirconium (Zr) and silicon (Si). The aluminum content is between 5.5% and 7.0%, the molybdenum content is between 2.8% and 3.8%, the zirconium content is between 0.8% and 2.0%, and the silicon content is between 0.2% and 0.35%.
Organization: TC11 titanium alloy is a typical α+β type titanium alloy with both α and β phases in the microstructure. α phase gives the alloy high strength and heat resistance, while β phase improves the alloy's plasticity and toughness. This reasonable combination of phase structure makes TC11 titanium alloy have good comprehensive performance.
Characteristics
1. Mechanical properties
High strength: TC11 titanium tube has high room temperature strength, tensile strength usually up to 900MPa or more, yield strength can reach 800MPa or more, can withstand larger loads.
Good toughness: in the high strength at the same time, TC11 titanium tube also has good toughness, not easy to brittle fracture.
Excellent fatigue resistance: after appropriate heat treatment and processing technology, TC11 titanium tubes can show good fatigue resistance.
Heat resistance: below 500℃, TC11 titanium alloy has excellent heat strength properties, such as high temperature strength and creep resistance.
Corrosion resistance: TC11 titanium tubes have good corrosion resistance to many corrosive media, including seawater, moist chlorine gas, oxidizing acids, etc.
2. Processing performance
Good thermal processing properties: can be made into tubes by hot extrusion, hot rolling and other thermal processing methods.
Weldability is good: can be connected by a variety of welding methods, welded joint strength close to the base metal.
Machinability: through reasonable selection of tools and processing parameters, can be turned, milling, drilling and other machining.
Third, the production process
1. Smelting: vacuum self-consumption arc melting or electron beam melting and other advanced technologies to ensure the uniformity of the alloy composition and high purity.
2. Forging: The ingot after melting is heated to a suitable temperature and forged to improve the alloy organization.
3. extrusion: produce various specifications of TC11 titanium tubes by extrusion process, to obtain better dimensional accuracy and surface quality.
4. Heat treatment: According to the application requirements, the tubes are subjected to heat treatment, such as annealing treatment, to stabilize the organization and properties.
IV. Application fields
1. Aerospace field: TC11 titanium tubes are commonly used in the manufacture of key components in aircraft engines, such as compressor disks, blades, drums and so on.
2. chemical field: can be used to manufacture chemical reactor, distillation tower, crystallization equipment, such as piping and components.
3. metallurgical industry: in metallurgical equipment, such as crusher and roll components, TC11 titanium tubes can improve the service life and working efficiency of the equipment.
4. Marine engineering field: It is used in the manufacture of components of desalination equipment, marine aquaculture equipment, etc., as well as submarine pipelines, etc., to resist the erosion of seawater.
In summary, TC11 titanium tubes play an important role in many fields such as aerospace, chemical, metallurgy and ocean engineering by virtue of its excellent composition and organization characteristics, performance characteristics, processing performance and wide range of applications.
