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Application of titanium pipe

Views: 0     Author: Site Editor     Publish Time: 2022-06-24      Origin: Site

Application of titanium pipe

Titanium alloy has high strength, low density, good mechanical properties, good toughness and corrosion resistance. In addition, titanium alloy has poor process performance and difficult machining. It is very easy to absorb impurities such as hydrogen, oxygen, nitrogen and carbon during hot machining. There is also poor abrasion resistance and complex production process. The industrial production of titanium began in 1948. With the development of aviation industry, the titanium industry is developing at an average annual growth rate of about 8%. At present, the annual output of titanium alloy processing materials in the world has reached more than 40000 tons, and there are nearly 30 titanium alloy brands. 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 alloy is mainly used to make aircraft engine compressor parts, followed by rocket, missile and high-speed aircraft structural parts. In the mid-1960s, titanium and its alloys have been applied in general industries, such as making electrodes for electrolysis industry, condensers for power stations, heaters for oil refining and seawater desalination, and environmental pollution control devices. Titanium and its alloys have become a kind of corrosion resistant structural materials. In addition, it is also used to produce hydrogen storage materials and shape memory alloys.

China began research on titanium and titanium alloys in 1956; In the mid-1960s, the industrial production of titanium materials began and TB2 alloy was developed.

Titanium alloy is a new important structural material used in aerospace industry. Its specific gravity, strength and service temperature are between aluminum and steel, but its specific strength is high and has excellent seawater corrosion resistance and ultra-low temperature performance. In 1950, the United States used F-84 fighter bomber as non load-bearing components such as rear fuselage heat shield, wind deflector and tail cover for the first time. Since the 1960s, the use of titanium alloy has moved from the rear fuselage to the middle fuselage, partially replacing structural steel to manufacture important load-bearing components such astitanium welded pipe company - TIRONG TECH spacer frames, beams, flap slides, etc. The amount of titanium alloy used in military aircraft has increased rapidly, reaching 20% ~ 25% of the aircraft structural weight. Since the 1970s, a large number of titanium alloys have been used in civil aircraft. For example, the amount of titanium used in Boeing 747 aircraft has reached more than 3640 kg. For aircraft with Mach number less than 2.5, titanium is mainly used to replace steel to reduce structural weight. For another example, the US SR-71 high-altitude high-speed reconnaissance aircraft (flying Mach number is 3, flying altitude is 26212 meters), titanium accounts for 93% of the aircraft structure weight, so it is called "all titanium" aircraft. When the thrust weight ratio of the aeroengine increases from 4 ~ 6 to 8 ~ 10, and the compressor outlet temperature correspondingly increases from 200 ~ 300 ° C to 500 ~ 600 ° C, the low-pressure compressor disk and blade originally made of aluminum must be made of titanium alloy, or the high-pressure compressor disk and blade must be made of titanium alloy instead of stainless steel, so as to reduce the structural weight. In the 1970s, the amount of titanium alloy used in aeroengines generally accounted for 20% ~ 30% of the total structural weight. It was mainly used to manufacture compressor components, such as forged titanium fans, compressor disks and blades, cast titanium compressor casings, intermediate casings, bearing shells, etc. The spacecraft mainly uses the high specific strength, corrosion resistance and low temperature resistance of titanium alloy to manufacture various pressure vessels, fuel tanks, fasteners, instrument straps, frames and rocket shells. Artificial earth satellites, lunar modules, manned spacecraft and space shuttles also use titanium alloy plate weldments.

Knowledge of titanium tube and titanium alloy

Titanium is an important structural metal developed in the 1950s. Titanium alloys are widely used in various fields because of their high specific strength, good corrosion resistance and high heat resistance. Many countries in the world have recognized the importance of titanium alloy materials, have carried out research and development, and have been applied in practice. Titanium is the Ⅳ B element in the periodic table. It looks like steel with a melting point of 1672 ℃. It is a refractory metal. Titanium is abundant in the earth's crust, much higher than common metals such as Cu, Zn, Sn and Pb. China is extremely rich in titanium resources. Only in the super large vanadium titanium magnetite discovered in Panzhihua, Sichuan Province, the associated titanium metal reserves reach about 420million tons, which is close to the total proven titanium reserves abroad. Titanium alloys can be divided into heat-resistant alloys, high-strength alloys, corrosion-resistant alloys (titanium molybdenum, titanium palladium alloys, etc.), low-temperature alloys and special functional alloys (titanium iron hydrogen storage materials and titanium nickel memory alloys).

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