The most widely used titanium alloys are Ti-6Al-4V (TC4), Ti-5Al-2.5Sn (Ta7) and industrial pure titanium (TA 1, TA2 and TA3). The titanium alloy includes TC4 titanium alloy.
Titanium alloy has high strength, low density, good mechanical properties, good toughness and corrosion resistance. In addition, titanium alloy has poor technological performance, difficult cutting and easy absorption of impurities such as hydrogen, oxygen, nitrogen and carbon during hot working.
In addition, the wear resistance is poor and the production process is complicated. The industrial production of titanium began in 1948. With the development of aviation industry, titanium industry develops at an average annual rate of about 8%. The annual output of titanium alloy processing materials in the world has reached more than 40 thousand tons, and there are nearly 30 kinds of titanium alloy brands.
Extended data
With TC4? The continuous application and research of ELI titanium alloy is to better tap the comprehensive performance potential of the alloy. By adjusting the elements and their contents of the alloy, impurity elements such as Fe and O are mainly reduced, and the O content is strictly controlled. By optimizing the hot working process and heat treatment process, the fracture toughness and forming matching of the alloy can reach the maximum damage tolerance potential.
The plane strain fracture toughness KIC or KQ of β-annealed+secondary annealed sheet should not be less than 93MPa.m, and the elongation at break of sheet with thickness not greater than 25.4mm should not be less than 65,438+00%.
Its mechanical properties maintain high fracture toughness, and the elongation after fracture can still meet the requirements of current national standards. The mechanical properties of β-annealing+secondary annealing steel plate specified in this standard are consistent with AMS4905D.
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