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        Ten properties of titanium

        Date:2015-8-1 11:59

        Abstract:

        Low density, high specific strength
             Density of titanium metal is 4.51g / cm3, higher than Al and less than steel, copper, nickel, but the head of the ratio of the intensity of the metal is located.
            
            
             Corrosion Resistance
             Titanium is a very reactive metal, which is very low equilibrium potential, thermodynamic corrosion tendency in the medium is large. But in fact the titanium is very stable in many media, such as titanium in an oxidizing, neutral or weakly reducing medium such as corrosion resistant. This is because the titanium and has a great affinity for oxygen, air or oxygen-containing medium, the titanium surface layer of dense, strong adhesion, large inert oxide film to protect the titanium substrate corrosion. Even due to mechanical wear and tear will heal or regenerate quickly. This shows that titanium is a metal with a strong passive tendencies. Oxide film dielectric temperature below 315 ℃ titanium always maintain this characteristic.
             In order to improve the corrosion resistance of titanium, developed oxidation, plating, plasma spraying, surface treatment technology ion nitriding, ion implantation and laser treatment, the titanium oxide film has played a role in enhanced protection, access to the desired corrosion effect. For the sulfuric acid, hydrochloric acid, methyl amine solution, high-temperature and high temperature chloride wet chlorine produced in the need of metal materials, the development of titanium - molybdenum, titanium - palladium, titanium - molybdenum - and a series of corrosion resistant nickel titanium alloy. Titanium castings using a titanium-molybdenum alloy -32, for often pitting or crevice corrosion environments using titanium -0.3 -0.8 molybdenum-nickel alloy or titanium partial use of equipment -0.2 titanium-palladium alloy, have received a very good use effect.
            
            
             Good heat resistance
             The new long-term use titanium or higher temperature 600 ℃.
            
            
             Good low temperature performance
             Titanium TA7 (Ti-5Al-2.5Sn), TC4 (Ti-6Al-4V) and Ti-2.5Zr-1.5Mo as the representative of the low temperature titanium alloy, its strength with decreasing temperature increase, but the plastic does not change great. Maintain good ductility and toughness at low temperature -196-253 ℃, avoid cold brittle metal, is an ideal material for cryogenic vessels, tanks and other equipment.
            
            
             Strong anti-damping properties
             After the titanium is subjected to mechanical vibration, electrical vibration, compared with steel, copper, its vibration damping longest. The use of titanium can be used for performance tuning fork, vibrating mill film ultrasonic vibrating elements in medicine and advanced audio speakers and so on.
            
            
             Non-magnetic, non-toxic
             Titanium is non-magnetic metal, a large magnetic field will not be magnetized, non-toxic and with human tissue and blood have good compatibility, they were using the medical profession.
            
            
             Tensile yield strength of its proximity
             This performance titanium shows its yield ratio (tensile / yield strength) high, indicating that the titanium material difference in molding plastic deformation. Since the ratio of the yield limit of the titanium and the elastic modulus is large, so that resiliency titanium molding large.
            
            
             Good heat transfer performance
             Although the thermal conductivity of titanium is lower than carbon steel and copper, but the titanium excellent in corrosion resistance, so the wall thickness can be significantly thinner, and the surface heat exchanger with steam way dropwise condensation, reduces the heat set, too surface not scaling may also reduce the thermal resistance of titanium to make the heat transfer performance is significantly improved.
            
            
             Low elastic modulus
             Titanium elastic modulus at room temperature 106.4GMPa, 57% of the steel.
            
            
             Suction performance
             Titanium is a very active chemical properties of metals can react with many elements and compounds at high temperatures. Titanium getter mainly refers to the reaction occurs at high temperature and carbon, hydrogen, nitrogen, oxygen.

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