knowledges

Ten Properties Of Titanium

2024-01-05 18:00:06

Small density, high specific strength


The density of titanium is 4.51g/ cm, higher than aluminum but lower than steel, copper and nickel, but the specific strength is the first in the metal.


Corrosion resistance


Titanium is a very reactive metal, and its equilibrium potential is very low. But in fact, titanium is very stable in many media, such as oxidation, neutral and weak reduction of titanium in the medium is corrosion resistant. This is because titanium and oxygen have a great affinity, in the air or in the medium containing oxygen, titanium surface formation of a dense, strong adhesion, inert large oxide film, protect the titanium matrix from corrosion. Even through mechanical wear and tear will quickly self - healing or regeneration. This indicates that titanium has a strong passivation tendency. Titanium oxide film with medium temperature below 315℃ always maintains this characteristic.


In order to improve the corrosion resistance of titanium, surface treatment technologies such as oxidation, electroplating, plasma spraying, ion nitriding, ion implantation and laser treatment have been developed to enhance the protective effect of titanium oxide film and obtain the desired corrosion resistance effect. A series of corrosion resistant titanium alloys such as ti-mo, ti-pd, ti-mo - ni have been developed for the production of metal materials such as sulfuric acid, hydrochloric acid, methylamine solution, high temperature and humidity chlorine gas and high temperature chloride. Ti-32 molybdenum alloy was used in titanium casting, ti-0.3 molybdenum-0.8 nickel alloy was used in crevice corrosion or pitting corrosion environment, and ti-0.2 palladium alloy was used locally in titanium equipment, all of which obtained good application effect.


Good heat resistance


The new titanium alloy can be used for a long time at 600℃ or higher.


Good low temperature resistance


Titanium alloy TA7 (ti-5al-2.5sn), TC4(ti-6al-4v) and ti-2.5 zr-1.5 Mo are represented by low-temperature titanium alloys, whose strength increases with the decrease of temperature, but their plasticity changes little. Good ductility and toughness at -196-253℃, avoiding cold brittleness of metal, it is an ideal material for cryogenic containers, storage boxes and other equipment.


Strong damping resistance


Compared with steel and copper, titanium has the longest vibration attenuation time. The titanium can be used as tuning fork, vibration element of ultrasonic crusher in medicine and vibration film of advanced loudspeaker.


Non magnetic, non toxic


Titanium does not have magnetism metal, won't be magnetized in very big magnetic field also, nontoxic and with human body organization and blood have good intermiscibility, be used by medical treatment bound so.


Tensile strength is close to yield strength


This property of titanium indicates that its bending strength ratio (tensile strength/yield strength) is high, which indicates that the plastic deformation of metal titanium materials is poor during forming. Due to the ratio of yield limit and elastic modulus of titanium, the springback ability of titanium is large.


Good heat transfer performance


Although the thermal conductivity of titanium is lower than that of carbon steel and copper, the wall thickness of titanium can be greatly reduced due to its excellent corrosion resistance. Moreover, the way of heat transfer between the surface and steam is dripping condensation, which reduces the heat group. The lack of scale on the surface can also reduce the thermal resistance, which significantly improves the heat transfer performance of titanium.


Low modulus of elasticity


The elastic modulus of titanium at room temperature is 106.4GPa, which is 57% of steel.


Breathe in performance


Titanium is a chemically reactive metal that can react with many elements and compounds at high temperatures. Titanium inhalation mainly refers to the reaction with carbon, hydrogen, nitrogen and oxygen at high temperature.


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