The Characteristics And Usage Of Titanium And Titanium Alloy
Pure titanium is a silvery white metal, it has many excellent properties of titanium ,density is 4.51 g/cm3, 43% lighter than steel, slightly heavier than the prestigious light metal magnesium and same mechanical strength with steel, mechanical strength almost two times larger than aluminum, five times larger than magnesium .Titanium has a high temperature resistant performance, melting point is 1942K, 1000 K higher than gold, 500 K higher than steel.
Chemical properties of titanium are relatively reactive metal, titanium can react with O2, N2, H2, S and halogen ect , when heated. At room temperature, a thin layer of titanium surface easy into density of the oxide film, can resist the effect of acid and aqua regia, showed a strong corrosion resistance. Therefore, common metal in acid, alkali, salt solution become riddled with holes and the titanium is safe.
Liquid titanium can dissolve almost all metals, so can form and various metal alloys. Titanium joining of titanium steel in steel tough and resilient.
Plane made from titanium alloy is as same weight as other metal aircraft, which can carry more than 100 passengers. Submarine made of titanium alloy, can not only sea water corrosion resistance, but also deep pressure resistance, its depth than stainless steel submarine increased by 80%.At the same time, the titanium nonmagnetic, will not be mine, found that have good anti monitoring role.
Titanium has close biological, in the human body, the secretion of resistance to corrosion and non-toxic, any sterilization methods for adaptation. So is widely used in medical apparatus and instruments, artificial hip, knee, joints at shoulder, joint side skull, active heart valve and bone clamp .When the new muscle fiber ring on the titanium bone, the titanium bone began to sustain the normal activities of the body.
Titanium is widely dispersed in the human body, the normal levels in the body is not more than 15 mg per 70 kg weight, its role is unclear. But titanium can stimulate the phagocytes, boosting the immune system that has been confirmed.