Titanium alloy with high strength and small density, good mechanical properties, toughness and corrosion resistance is very good. In addition, the titanium alloy process performance is poor, cutting difficult, in the hot work, it is very easy to absorb impurities such as nitrogen and nitrogen. There are poor wear resistance, the production process is complex. The industrial production of titanium began in 1948. The need for the development of the aviation industry, the titanium industry to an average annual growth rate of about 8%. At present, the world's annual output of titanium alloy processing has reached 4 million tons, nearly 30 kinds of titanium alloy grades. The most widely used titanium alloys are Ti-6Al-4V (TC4), Ti-5Al-2.5Sn (TA7) and industrial pure titanium (TA1, TA2 and TA3).
Titanium alloy is mainly used for the production of aircraft engine compressor parts, followed by rockets, and high-speed aircraft structural parts. In the mid-1960s, titanium and its alloys were used in general industry for the manufacture of electrodes in the electrolysis industry, condensers for power stations, heaters for desalination and desalination, and environmental pollution control devices. Titanium and its alloys have become a corrosion resistant structural material. Also used in the production of hydrogen storage materials and shape memory alloys.
Shantou, 0.5mm pure titanium foil titanium alloy heat treatment
Commonly used heat treatment methods are annealing, solid solution and aging treatment. Annealing is to eliminate internal stress, improve plasticity and tissue stability, in order to obtain better overall performance. Usually α (α + β) alloy annealing temperature is selected at (α + β) - → β phase transition point below 120 ~ 200 ℃; solution and aging treatment is cold from the high temperature zone to obtain martensitic α 'phase and metastable Of the β phase, and then in the medium temperature insulation so that these metastable phase decomposition, the α phase or compound and other small dispersion of the second phase of the particle, to achieve the purpose of strengthening the alloy. In general, the quenching of (α + β) alloy is carried out at 40 ~ 100 ° C below the (α + β) - → β phase transition point, and the metastable β alloy is quenched at 40 ~ 80 ° C above the (α + β) - β phase transition point. The aging treatment temperature is generally 450 to 550 ° C.