Titanium alloy performance characteristics

Titanium is a new type of metal. The performance of titanium is related to the content of impurities such as carbon, nitrogen, hydrogen, and oxygen. The purity of titanium iodide does not exceed 0.1%, but its strength is low and its plasticity is high.

The properties of 99.5% industrial pure titanium are: density ρ = 4.5g / cubic centimeter, melting point 1725 ℃, thermal conductivity λ = 15.24W / (mK), tensile strength σb = 539MPa, elongation δ = 25%, cross section Shrinkage ψ = 25%, elastic modulus E = 1.078 × 105MPa, hardness HB195.
High thermal strength

The use temperature is several hundred degrees higher than that of aluminum alloy. It can still maintain the required strength at medium temperature. It can work for a long time at a temperature of 450 to 500 ℃. These two types of machining titanium alloys are still very high in the range of 150 ℃ to 500 ℃. Specific strength, while the specific strength of aluminum alloy at 150 ℃ significantly decreased. The working temperature of titanium alloy can reach 500 ℃, aluminum alloy is below 200 ℃.
Good corrosion resistance

Titanium alloys work in humid atmosphere and seawater media, and their corrosion resistance is far superior to stainless steel; they are particularly resistant to pitting, acid corrosion, and stress corrosion; organic materials such as alkali, chloride, chlorine, nitric acid, and sulfuric acid Etc. have excellent corrosion resistance. But titanium has poor corrosion resistance to media with reducing oxygen and chromium salts.

Good low temperature performance

Titanium alloy can still maintain its mechanical properties under low temperature and ultra-low temperature. Machining Titanium alloys with good low temperature performance and extremely low interstitial elements, such as TA7, can maintain a certain plasticity at -253 ℃. Therefore, titanium alloy is also an important low-temperature structural material.

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