Application of different types of titanium alloys-2
TA5 and TA6 are used for parts and welded parts that work in corrosive media below 400 °C, such as aircraft skins, skeleton parts, compressor casings, blades, ship parts, etc.
TA7 is used for structural parts and various die and forging parts that work for a long time below 500 °C, and can reach 900 °C for short-term use. It can also be used for ultra-low temperature (-253°C) parts (such as containers for ultra-low temperature).
4. β-type titanium alloy, grade TB2: The main alloying elements of this type of alloy are β-phase stabilizing elements such as molybdenum, chromium, and vanadium. It is easy to retain the high-temperature β-phase to room temperature during normalizing and quenching to obtain a more stable β-phase. β-phase structure, so called β-type titanium alloy.
β-type titanium alloy can be strengthened by heat treatment, has high strength, good welding performance and pressure processing performance; but the performance is not stable enough, and the melting process is complicated, so it is not as widely used as α-type and α+β-type titanium alloys.
Parts that can be used for work below 350 °C, mainly used to manufacture various overall heat treatment (solution, aging) sheet metal stampings and welded parts; such as compressor blades, wheels, shafts and other heavy-duty rotating parts and aircraft components Wait. TB2 alloys are generally delivered in a solution treated state and used after solution and aging.
5. The commonly used grades of α+β titanium rods and titanium alloy titanium rods are TC6 titanium rods, TC9 titanium rods, and TC10 titanium rods: these alloys have α+β type two-phase structure at room temperature, so they are named α+β type titanium rods. alloy. It has good comprehensive mechanical properties, most of which can be strengthened by heat treatment (but TC1, TC2, TC7 cannot be strengthened by heat treatment), good forging, stamping and welding properties, machinable, high room temperature strength, and high temperature below 150-500 ℃ Some (such as TC1, TC2, TC3, TC4) also have good low temperature toughness and good resistance to seawater stress corrosion and thermal salt stress corrosion resistance; the disadvantage is that the structure is not stable enough.
This type of alloy is most widely used in TC4, and the amount of TC4 titanium rod accounts for about half of the existing titanium alloy production. The alloy not only has good mechanical properties at room temperature, high temperature and low temperature, but also has excellent corrosion resistance in various media, and can be welded, hot and cold forming, and can be strengthened by heat treatment; Industrial sectors are widely used.
TC1 and TC2 can be used for stamping parts, welded parts, die forgings and bending parts that work below 400 ℃. Both alloys can also be used as low temperature structural materials.
TC3 and TC4 can be used as parts for long-term work below 400℃, structural modules, various containers, pumps, low temperature components, ship pressure shells, tank tracks, etc. The intensity is higher than that of TC1 and TC2.
TC6 can be used below 400℃, mainly used as aircraft engine structural material. TC9 can be used to manufacture parts that work for a long time below 560℃, mainly used on the compressor discs and blades of aircraft jet engines.
TC10 can be used to manufacture parts that work for a long time below 450 ℃, such as aircraft structural parts, landing gear, honeycomb connecting components, missile engine casings, weapon structural parts, etc.
