What is Properties and Applications of Titanium Alloy Ti6Al4V
Guotai Junan released a research report saying that under the background of carbon neutrality, the scarcity of coal mines is prominent, and the value of assets will continue to increase. The high point of capital expenditure in the coal industry appeared in 2012. Under the general direction of carbon neutrality, the overall investment in the industry has slowed down, and capital expenditure has gradually declined. From 2021 to now, the Energy Bureau of the National Development and Reform Commission has only newly approved 17.4 million tons of Ti6Al4V alloy.
What is Titanium Alloy?
Titanium alloy Ti6Al4V is a medium-strength α-β type two-phase titanium alloy
containing 6% α-stabilizing element AI and 4% β-stabilizing element V. This
alloy has excellent comprehensive properties and has obtained the most extensive
applications in the aviation and aerospace industries.
The main properties and uses
Ti6Al4V titanium alloy is heated below 430 ℃ for a long time to form a very
thin and protective oxide film. As the heating temperature increases, the oxide
film thickens and its protection becomes poor. After the alloy was heated at 700
°C for 2 h, the oxide film thickness reached 25 μrn. Heating at temperatures
above 800°C forms a sparse oxide layer. After heating at 1000 °C for 1 h, the
thickness of the oxide layer reached 0.65 mm.
Ti6Al4V alloy can be welded by argon arc welding, spot welding, brazing,
electron beam welding and plasma welding. The strength of the welded joint is
basically the same as that of the base metal.
When Ti6Al4V titanium alloy parts are in contact with aluminum alloy and
structural steel parts, especially under certain corrosive medium conditions,
aluminum alloy and structural steel parts will suffer accelerated corrosion and
damage as the anode of the contact couple due to the negative electrode
potential. Therefore, between TC4 titanium alloy parts and aluminum alloy or
structural steel parts, protective measures such as padding and anti-corrosion
tape should be taken. TC4 alloy parts are strictly prohibited from contact with
parts or tools of lead, zinc, cadmium, tin, silver, bismuth and other
Before vacuum annealing, the oxide skin and oxygen-rich layer on the surface
of the parts should be removed, and the oil should be carefully removed before
entering the furnace. When vacuum annealing parts with complex shapes, fixtures
must be used to reduce the deformation of parts. Into the furnace parts are
preferably filled with pre-degassed titanium oxide-free chips to prevent
oxidation of the parts.
Ti6Al4V titanium alloy is now widely used in the manufacture of aero-engine
fans and compressor discs and blades, as well as various load-bearing beams,
frames, joints and fasteners in aircraft structures.
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The Ti6Al4V alloy industry has experienced demand expectations driven by the rise and the off-season tired stock driven by the seasonal decline in two rounds of the market. Affected by the COVID-19 epidemic and other factors, inventories of manufacturers continue to accumulate, putting pressure on market sentiment. In addition to off-season factors, the weak trend of Ti6Al4V alloy also reflects the market's concern about the epidemic and some other related enterprises' financial situation.