Supply of imported titanium alloy TC4 titanium alloy TC4 TC4 titanium rods

The most widely used titanium alloy is Ti-6Al-4V (TC4), Ti-5Al-2.5Sn (TA7) and commercially pure titanium (TA1, TA2 and TA3). Titanium is mainly used for the production of aircraft engine compressor components, followed by rocket structure, ****** and high-speed aircraft. The mid-97's, titanium and its alloys have been in general industrial applications, the electrodes used for the production of electrolytic industry, power plant condensers, oil refining and desalination heater and environmental pollution control devices. Titanium and its alloys have become a corrosion resistant structural materials. In addition, for the production of hydrogen storage materials and titanium based shape memory alloys based on titanium alloy by adding other elements. There are two isomeric titanium crystal: The following 882 ℃ for hcp titanium α, β titanium above 882 ℃ for the body-centered cubic. Titanium is allotrope, melting point 1720 ℃, showed a close-packed hexagonal lattice structure, called α titanium at temperatures below 882 ℃; body-centered cubic structure over 882 ℃ character was called β titanium. The use of the different characteristics of the two titanium structures, adding appropriate alloying elements, so that the phase transition temperature and relative content of different tissues obtained by gradually changing the titanium (titanium alloys). At room temperature, there are three titanium matrix organization, titanium will be divided into the following three categories: α alloy, (α + β) alloys and β alloys. China respectively TA, TC, TB, said. Titanium is a new type of metal, and the performance of the carbon-containing titanium impurity content of nitrogen, hydrogen, oxygen and so on, the most pure titanium iodide impurity content not exceeding 0.1%, but its low strength, high ductility. 99.5% performance industrial pure titanium as: density ρ = 4.5g / cm3, melting point of 172 silicon alloy resistant floor 5 ℃, the thermal conductivity λ = 15.24W / (mK), tensile strength σb = 539MPa, elongation ratio δ = 25%, reduction of area ψ = 25%, the elastic modulus E = 1.078 × 105MPa, the hardness HB195. The density of titanium is generally about 4.5g / cm3, only 60% of steel, titanium's strength was close to the strength of ordinary steel, some high-strength titanium alloy structural strength than a lot of steel. Therefore, the ratio of titanium strength (strength / density) is much larger than other metal structural materials, see Table 7-1, the unit can be made out of high strength, rigidity, lightweight parts and components. Currently titanium aircraft engine components, skeleton, skin, so the use of titanium fasteners and landing gear main feature uses grade TA1, TA2, TA3 and chemical titanium ratio, impurities, is actually a low level of alloy, mechanical properties and chemical properties similar to stainless steel. It is characterized by high strength is not (compared with titanium), good plasticity, easy processing forming, stamping, welding, machining can be good formability; in the atmosphere, water, oxidizing atmosphere, neutral, weakly reducing atmosphere Structure antioxidant properties than most austenitic stainless steel, but the heat resistance is mainly used for low temperature below 350 ℃, but requires high plasticity discontinuity large stampings and corrosion; has good corrosion resistance parts, such as aircraft, skeleton, skin; ship seawater corrosion resistant pipes, valves, pumps and hydrofoil; chemical heat on, pump, distillation towers, chillers, ion pumps, compressors, valves, etc. the industry is generally higher formability using TA1, higher wear resistance and strength when using TA3. The most widely used is usually TA2 TA4 these alloys generally showed a single phase α state, heat strengthened not only by solid solution strengthening, room temperature strength was low, but the strength and creep limit temperature (500 ~ 600 ℃) under is the highest. And organizational stability, good oxidation resistance and weldability, corrosion resistance and machinability better, poor room temperature tensile properties of commercially pure titanium punching higher than can be used as a structural material of moderate intensity, mainly for domestic wire TA5, TA6 parts and weldments below 400 ℃ operating in corrosive media, such as structural parts for aircraft and various skeleton, skin, compressor housing, blade, some parts of the ship below the long-term work TA7 500 ℃ die forgings, short-term use of up to 900 ℃, can also be used cryogenic components (253 ℃), such as ultra-low temperature containers TA8 parts at below 500 ℃ for long-term work, such as engine compressor disk and blades. However, subject to certain restrictions on the use of the element due to the addition TB2 molybdenum, chromium, vanadium and other stable β phase, can be used in the β-phase heat treatment method is stable to room temperature. Because heat strengthened, with high strength. But the performance is not stable enough, smelting complex process, so the application is better α and α + β type titanium alloy widely used to work at below 350 ℃ parts such as plate stamping and welding parts, such as compressor blades and other heavy axle loads ,, rotating parts and components, such as titanium aircraft