Titanium Features

Titanium Features

High strength: the density of medical titanium alloy generally about 4.51g / 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 metallic structural materials, the unit can be made of high strength, rigidity, lightweight parts and components. At present, aircraft engine components, skeleton, skin, so the use of titanium fasteners and landing gear.
High thermal strength: Temperature several hundred degrees higher than aluminum, at moderate temperatures can still maintain the desired strength, long-term work at a temperature of 450 ~ 500 ℃. Titanium in the range of 150 ℃ ~ 500 ℃ still very high specific strength, while aluminum fell significantly at 150 ℃ when strength. Titanium alloy operating temperature up to 500 ℃, the aluminum alloy is below 200 ℃.
Good corrosion resistance:titanium alloy sheet work in humid atmosphere and seawater, which is far superior corrosion resistance of stainless steel floating nuclear Ne Kou Fu jump inch too Dan coffee; for pitting, etching, stress corrosion resistance is particularly strong ; to have excellent alkali, chlorides, organic chlorine materials, nitric acid, sulfuric acid, etc. corrosion resistance. However, the corrosion resistance of titanium with a reduction of oxygen and chromium salts medium is poor.
Good low temperature performance: titanium at low and ultra-low temperature, can still maintain its mechanical properties. Low temperature performance, low interstitial elements of titanium, as TA7, at -253 ℃ still maintain a certain plasticity. Thus, low-temperature titanium alloy is also an important structural materials.
Large chemical activity: chemical activity of titanium is large, a strong chemical reaction with atmospheric O, N, H, CO, CO2, water vapor, ammonia and the like. Carbon content greater than 0.2%, it will form a hard TiC in the titanium alloy; at higher temperatures, and the role of N will form a hard surface TiN titanium alloy products; at above 600 ℃, the titanium absorbs oxygen to form a high hardness the hardened layer; hydrogen content increased, will form brittle layer. Absorbing gas produced brittle surface to a depth of 0.1 ~ 0.15 mm, the degree of hardening of 20% to 30%. Chemical affinity of titanium is also large, easy and sticking friction surface.