Titanium alloy has high strength and small density, good mechanical properties, toughness and corrosion resistance are very good. In addition, titanium alloy process performance is poor, cutting difficulties, in thermal processing, it is very easy to absorb hydrogen and nitrogen carbon and other impurities. There is also poor abrasion resistance, complex production process. The industrial production of titanium began in the 1948. The development of the aviation industry needs to enable the titanium industry to grow at an average annual rate of about 8%. At present, the world's annual production of titanium alloy processing materials has reached more than 40,000 tons, titanium alloy grades of nearly 30 species.
The most widely used titanium alloys are ti-6al-4v (TC4), TI-5AL-2.5SN (TA7) and industrial pure titanium (TA1, TA2 and TA3). Titanium alloys are mainly used to make aircraft engine compressor components, followed by rockets, missiles and high-speed aircraft structural parts. In the middle of the 60, titanium and its alloys have been used in general industry for the production of electrodes in the electrolytic industry, condensers for power stations, heaters for petroleum refining and desalination, and environmental pollution control devices. Titanium and its alloys have become an corrosion-resistant structural material.
It is also used in the production of hydrogen storage materials and shape memory alloys.
The study of titanium and titanium alloys began in China in 1956, and the industrial production of titanium and the development of TB2 alloys began in the middle of the 60. Titanium Alloy is a new important structural material used in aerospace industry, the specific gravity, strength and use temperature are between aluminum and steel, but the strength is high and has excellent resistance to seawater corrosion and ultra-low temperature performance. 1950 the United States for the first time in the F-84 combat bombers used as a rear fuselage insulation plate, wind guide, tail cover and other non-bearing components. In the 60 's, the use of titanium alloys from the rear fuselage to the middle fuselage, part of the replacement of structural steel to create diaphragm, beam, flaps and other important bearing components. The amount of titanium alloy in military aircraft increases rapidly, reaching the 20%~25% of aircraft structure weight. In the 70 's, civil aircraft began to use a large number of titanium alloys, such as the Boeing 747 aircraft with titanium capacity of more than 3640 kg. Titanium for aircraft with Mach numbers less than 2.5 is mainly used to replace steel in order to reduce structural weight. For example, the United States SR-71 high-speed reconnaissance aircraft (flight Mach number 3, flight height of 26212 meters), titanium accounted for 93% of the weight of aircraft structure, known as "all Titanium" aircraft. When the push weight of the aero-engine is increased from 4~6 to 8~10, and the outlet temperature of the compressor increases correspondingly from the 200~300°c to the 500~600°c, the low pressure compressor discs and blades made of aluminum must be converted to titanium alloys, or high-pressure compressor disks and blades should be made of titanium alloy instead of stainless steel to reduce the weight of the structure. In the 70 's, the amount of titanium alloy in aero-engine generally accounts for the total weight of the 20%~30%, mainly used in the manufacture of compressor components, such as forged titanium fans, compressor discs and blades, cast titanium compressor chassis, intermediary box, bearing shell and so on. Spacecraft mainly use titanium alloy high specific strength, corrosion resistance and low temperature resistance to manufacture a variety of pressure vessels, fuel tanks, fasteners, instrument straps, frames and rocket shells. Artificial Earth satellites, lunar cabins, manned spacecraft and space shuttles also use titanium alloy plate welds.
- Introduction To Finned Tubes
- Main Performance Requirements Of Finned Tubes
- Present Situation Of Production Technology Of F...
- Classification Of Finned Tubes
- Introduction To Titanium Tubes
- Production Standard Of Titanium Pipe
- Alloying Of Titanium Tubes
- Titanium Alloy Elements
- Classification Of Titanium Tubes
- Classification Of Titanium Tubes
- Titanium Alloy Knowledge