Processing characteristics and applications of titanium alloys

Pure titanium is a silver-white metal with many excellent properties.The density of titanium is 4.54g/cm3, 43% lighter than steel,slightly heavier than the venerable light metal magnesium, it is mechanically about as strong as steel, twice as strong as aluminium and five times as strong as magnesium.Titanium is resistant to high temperature and has a melting point of 1942K,it is nearly 1000K higher than gold and 500K higher than steel, so it is called refractory metal.

Titanium is a chemically active metal. It can react with O2, N2, H2,S and halogen when heated.But at room temperature, titanium tends to have a very thin, dense oxide coating on its surface,it can resist the action of strong acid and even aqua regia, showing strong corrosion resistance,as a result, ordinary metals become porous in a solution of acid, base and salt, while titanium remains intact.Liquid titanium dissolves almost all metals, so it can be alloyed with a variety of metals.Titanium steel is tough and elastic when titanium is added to steel.Titanium and metal Al, Sb, Be, Cr, Fe can produce interstitial compound or intermetallic compound.

A plane made of titanium alloy can carry more than 100 passengers than a plane made of the same weight of other metals.The submarine made of titanium alloy can resist both seawater corrosion and deep pressure, and its diving depth is 80% higher than that of the stainless steel submarine.At the same time, titanium is non-magnetic and will not be found by mines, so it has a good anti-monitoring effect.

Titanium is a biophile.Titanium resists the corrosion of secretions and is non-toxic in human body,it is suitable for any sterilization method.Therefore, it is widely used in the manufacture of medical devices, including artificial hips, knees, shoulder joints, flank joints, cranium, active heart valves and bone fixation clips.As new loops of muscle fibers wrap around these titanium bones, they begin to support normal human activity.Titanium is widely distributed in the human body,a normal human body contains no more than 15mg per 70kg of body weight.Its role is unclear,but its ability to stimulate phagocytes and boost immunity has been shown.

Titanium compounds and applications: important titanium compounds include titanium dioxide (TiO2), titanium tetrachloride (TiCl4), barium titanate (BaTiO3).Pure titanium dioxide is a white powder, is a fine white pigment, trade name titanium white. It has both the covering property of lead white (PbCO3) and the durability of zinc white (ZnO).

Therefore, people often add titanium white in the paint, made of high - grade white paint; It is used as filler in paper pulp industry. It is used as a matting agent for artificial fiber in textile industry.Titanium white in glass, ceramic, enamel industry as an additive to improve its performance;It is used as a catalyst in many chemical reactions.With the development of chemical industry, titanium dioxide and titanium compounds as fine chemical products have high added value and attractive prospect.Titanium tetrachloride is a colorless liquid with a melting point of 250K and a boiling point of 409K.It hydrolyzes easily in water or wet air, giving off a lot of white smoke.TiCl4+3H2O == H2TiO3+4HCl, so TiCl4 is used in military as an artificial smog agent, especially in sea warfare.In agriculture, people use the thick fog formed by TiCl4 to reduce the heat loss from the ground at night, and protect vegetables and crops from the harm caused by cold and frost.Barium partial titanate was prepared by melting TiO2 and BaCO3 together.TiO2+BaCO3 == BaTiO3 10 CO2, man-made BaTiO3 has a high dielectric constant,The capacitor made from it has a large capacity and, more importantly, BaTiO3 has significant piezoelectric properties.The crystals are compressed to produce an electric current, which changes its shape when applied to it.People put it in the ultrasonic wave, it is compressed to produce a current, you can measure the strength of the ultrasonic wave by measure the strength of the current,it is used in almost all ultrasound instruments.With the development and utilization of titanate, it is more and more widely used to manufacture nonlinear components, dielectric amplifiers, electronic computer memory components, micro-capacitors, electroplating materials, aerospace materials, strong magnetic, semiconductor materials, optical instruments, reagents, etc.The processing of titanium alloys and the excellent properties of titanium compounds make them urgently needed, but the high production costs limit their application.We believe that in the near future, with the continuous improvement and improvement of titanium smelting technology, the processing of titanium alloy and the application of titanium compounds will get greater development.Titanium products: titanium and titanium alloy are very important lightweight structural materials, which have very important application value and broad application prospects in aerospace, vehicle engineering, biomedical engineering and other fields.

Type: typified titanium, industrial pure titanium,  α titanium,  β titanium, α ＋β titanium.