Titanium alloys can be divided into structural titanium alloys and thermo-resistant titanium alloys, or alpha titanium alloys, beta titanium alloys, and alpha and beta titanium alloys.The research scope also includes the forming technology of titanium alloy, powder metallurgy technology, rapid solidification technology, military and civil of titanium alloy.Titanium alloys are alloys that are made of titanium based on other alloy elements.Titanium alloy has the advantages of low density, high specific strength, good corrosion resistance and good process performance. It is an ideal structural material for aerospace engineering.
Application:
Titanium alloy is a new kind of structural material, it has excellent comprehensive performance, such as the density is small (~ 4.5 GCM - 3), high specific strength and fracture toughness than, good fatigue strength and crack propagation resistance, good low temperature toughness, excellent corrosion resistance, resistance of some of the titanium alloy of the highest working temperature is 550 oc, expect up to 700 oc.Therefore, it has been widely used in aviation, aerospace, chemical industry, shipbuilding and other industrial sectors.Light alloy, steel and other 0.2 / density (sigma) and the relationship between temperature, than strong than other metals, titanium alloy steel and nickel alloy, and this advantage can keep to about 500 oc, so some of the titanium alloy is suitable for manufacturing gas turbine components.About 80% of titanium production is used in aerospace and aerospace industries.For example, titanium alloys account for about 21% of the structural materials of the American b-1 bomber, mainly used for fuselage, wing, skin and bearing components.The body structure of f-15 fighter aircraft, titanium alloy amount of 7000kg, about 34% of the structure weight.The structure of the Boeing 757 is about 5 percent titanium and 3, 640kg.The DC10 aircraft produced by McDonnell Douglas (Mc-donnell -Dounlas) has a titanium content of 5500kg, accounting for more than 10% of the structural weight.Titanium in chemical and general engineering: the United States accounts for about 15 percent of its production, and Europe accounts for about 40 percent.Due to the excellent corrosion resistance of titanium and its alloys, good mechanical properties, and qualified histocompatibility, it is used to make biomaterials such as prosthetic devices.
Features:
Titanium has a relatively low density of 4.5g/cm3, only 60% of iron, and is usually referred to as light metals such as aluminum and magnesium, and its corresponding titanium alloys, aluminum alloys and magnesium alloys are called light alloys.Many countries in the world have realized the importance of titanium alloy materials and have developed and developed titanium alloy materials.Titanium is developed in the 1950 s a kind of important structure of the metal, for titanium alloy with high strength, good corrosion resistance, high heat resistance, easy to welding characteristics and is widely used in various fields, especially in high strength, easy to welding performance is advantageous to the golf club head made the first practical titanium alloy is the successful development of Ti - 1954 6 al (aluminum) - 4 v alloy (alum).The ti-6al-4v alloy is good in heat resistance, strength, plasticity, toughness, formability, weldability, corrosion resistance and biocompatibility.The use of ti-6al-4v alloy is 75~85% of the total titanium alloy.Many other alloys can be considered to be a modified ti-6al-4v alloy.
At present, the world has developed hundreds of titanium alloy, one of the most famous twenty to thirty kinds of alloy, for example, have Ti 6 al 4 v, Ti - 5-2.5 Sn, Ti - 2 al - 2.5 - Zr, Ti - 32 Mo, Ti, Mo, Ni, Ti - Pd, Ti, Ti - 811-811, Ti, Ti - 1023-10-5-3, Ti - 1100, BT9, BT20, IMI829, IMI834, etc;There are 10-2-3,SP700,15-3-3-3 (commonly referred to as beta titanium),22-4,DAT51.Titanium alloy can be divided into alpha, alpha + beta, beta type titanium alloy and aluminum intermetallic compounds (TixAl, where x = 1 or 3) four types of titanium alloy in accordance with the organization can be divided into three categories. (1 titanium aluminum and tin elements. 2 adding aluminium chromium molybdenum vanadium titanium and other alloying elements. 3 adding aluminium vanadium and titanium element.) titanium alloy with high strength and density of small, good mechanical performance, toughness and corrosion resistance is very good. Also: titanium alloy process performance is poor, machining difficulties. During hot working, very easy to absorb hydrogen nitrogen impurities such as carbon. And abrasion resistance is poor, complex production process. Titaniumalloys for titanium alloy as base to join other elements.The industrial production of titanium began in 1948.The development of the aviation industry requires that the titanium industry grow at an average annual rate of about 8%.At present, the annual production of titanium alloy in the world has reached 40,000 tons, and there are nearly 30 titanium alloy plates.The most widely used titanium alloys are ti-6al-4v (TC4), ti-5al-2.5 Sn(TA7) and industrial pure titanium (TA1, TA2 and TA3).
Titanium alloys are mainly used in the production of aircraft engine compressor parts, followed by rocket, missile and high-speed aircraft structures.60 s, titanium and its alloy has set up a file in the general industrial application of electrodes used in electrolysis industry, power plant condenser, oil refining and seawater desalination heater and environmental pollution control devices, etc.Titanium and its alloys have become a kind of corrosion resistant structural material.It is also used in the production of hydrogen storage materials and shape memory alloy.
