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Titanium Plate Application
Titanium plate implementation standards are two, the national standard is GB / T3621-2007, GB / T13810-2007, American standard is ASTM B265, ASTM F136, ASTM F67, AMS4928.
Titanium is an inert metal, its chemical symbol is ti, atomic number is 22, is a silver metal. The proportion of 4.51, the melting point of 1668 ° C. Its reserves in the crust is very rich, it is second only to iron, aluminum, magnesium, ranking fourth, than the commonly used metal copper, nickel, lead, zinc more than ten times. Industry used to produce titanium ore rutile, ilmenite and titanium magnetite, due to separation and extraction difficulties, with the industrial significance of metal titanium until the 40s of this century to produce. Thus titanium is generally referred to as rare light metals. In the case of
Due to the different products in different areas need titanium and titanium alloy products, people will be processed into plates, rods, tubes, belts, silk, etc. can be done in the shape of deep processing to provide the majority of demand to meet the needs of different areas, Titanium plate, titanium rod, titanium tube is the most widely used.
Titanium plate surface should be smooth, was metallic color. The sheet is allowed to be delivered on a sandblasted surface. Titanium plate surface allows the presence of slight darkness and local watermarks; allow partial defects that do not exceed half of the thickness tolerance
Titanium plate application
Titanium and titanium alloy density, high tensile strength, in the range of -253-600 degrees Celsius, his specific strength in the metal material is almost the highest, it is in the appropriate oxidizing environment can form a thin and hard oxidation Material film, with excellent corrosion resistance. In addition, it also has a non-magnetic, linear expansion coefficient of small features. This makes titanium and alloy first known as the important aerospace structural materials, and then extended to the shipbuilding, chemical industry and other fields, and has been rapid development. Especially in the chemical industry, more and more products are used in titanium and titanium products, such as petrochemical, fiber, pulp, fertilizer, electrochemical and desalination and other industries, do the switch, reactor, synthesizer, Autoclave and so on. Titanium plate in electrolysis and desalination as electrolytic plate, electrolytic cell, in the reaction tower, the reactor was used as a tower and kettle body With the development of science and technology, titanium applications are also increasingly broad , Such as medical, automotive, sports, etc., through these also really reflect the titanium as a light metal, it has excellent features more and more people are recognized and can be set, and the fastest speed to replace Other metals and into our production applications, and even our body
Titanium plate characteristics
1. Titanium plate is the surface of the oxide film is equivalent to a good long-term wear-resistant release agent, the use of titanium plate to save the separation agent, so that easy to peel off the plate, eliminating the pre-treatment process, The board is lighter than the copper plate.
2. Titanium plate life is more than 3 times the copper plate, according to operating conditions up to 10 to 20 years
3. With titanium plate made of electrolytic copper crystal structure dense, smooth surface, excellent quality.
4. Since the titanium plate without applying the release agent, which can avoid the pollution of copper electrolyte.
5. To improve production capacity to reduce the cost of electrolytic copper production, which has a better economic benefits.
Titanium plate manufacturing process
A forging process carried out at a metal recrystallization temperature.
Hot rolling is carried out at a temperature higher than the recrystallization temperature.
Cold rolling plastic deformation temperature is lower than the recovery temperature of the rolling process.
An alloy heat treatment process in which the metal is slowly heated to a certain temperature, maintained for a sufficient time, and then cooled at a suitable speed (usually slow cooling, sometimes controlled to cool).
Pickling: The part is immersed in an aqueous solution of sulfuric acid or the like to remove a thin film such as an oxide on the metal surface. Is electroplating, enamel, rolling and other pre-treatment or intermediate processing.
What are the characteristics of titanium?Because of titanium is silvery white, with high melting point (1727 ℃), the proportion of light (4.5), (5) high mechanical strength, good low temperature resistance (ultra-low temperature resistivity almost 0), resistant to abrasion, titanium wire plastic good (can thin wall), it is not easy oxidation, strong reducibility, etc;Titanium oxide, titanium dioxide, titanium white, with non-toxic, good physical and chemical stability (1000 ℃ after calcination does not melt in any acid and alkali), high refractive index (2.55 ~ 2.70), and whiteness, strong tinting strength (1150 ~ 1150), covering power (40 ~ 50 g/m2), temperature resistance, resistance to pulverization, such as characteristics, known as "the king of the pigment.
Titanium alloy corrosion resistant performance, small density, good fatigue strength and ability to resist crack propagation, in aviation, spaceflight, automobile, shipbuilding, energy and other industries have broad application prospects.Titanium excellent corrosion resistance and good than strength, the titanium tube than the other traditional products made with the metal material pipes is thinner, so the heat exchange efficiency is better.TC4 titanium alloy is one of the most widely used titanium alloy, its high strength, good corrosion resistance, but it is hard to see TC4 titanium seamless pipe market at home and abroad the material of titanium seamless pipe.TC4 titanium mainly plate, on the market of TC4 tube by hot extrusion or inclined punch method such as the production of high strength thick wall pipe is given priority to, baoji non-ferrous metal processing plant sheep yulan warm rolling people research methods, such as manufacturing TC4 titanium alloy rolling products, the need to improve the traditional roll temperature rolling process, namely induction heating device installed in the mill, the processing equipment complex, cumbersome process, high production cost.Is the main cause of the current status of TC4 titanium alloy with high intensity, cold rolling forming is difficult.In order to solve the key technology of TC4 seamless tube cold rolling forming, he conducted a series of research.If use cold rolling forming technology producing high strength titanium alloy pipes directly, not only greatly reduce the production cost, and can meet the requirements for high performance applications of titanium alloy.
The appearance of titanium is very similar to steel, with a density of 4.51 g/cm 3 and less than 60% of steel, which is the lowest metal element in refractory metals.
Titanium is stable in the air at room temperature.When heating to 400 ~ 550 ℃, is generated on the surface of a solid layer of oxide film, to prevent further oxidation protection role.Titanium is highly capable of absorbing oxygen, nitrogen and hydrogen. Such gases are impurities that are very harmful to metal titanium, even if they are very small (0.01% ~ 0.005%), which can seriously affect its mechanical properties.
The mechanical properties of titanium are related to purity.The high purity titanium has excellent machining performance, the elongation rate and the reduction of area are all good, but the strength is low and the structure material is not suitable.Industrial pure titanium contains the appropriate amount of impurities, which has high strength and plasticity, suitable for making structural materials.
Titanium dioxide (TiO2) is the most practical value in titanium compounds.Ti02 is inert and harmless to the human body. It has a series of excellent optical properties.Ti02 is not transparent, the gloss and the white degree are high, the refractive index and scattering force are large, the covering force is strong and the dispersion is good, the pigment produced is white powder, commonly known as titanium white, which is widely used.
The chemical composition and mechanical properties of titanium tube: ASTM B338/ASME SB338 standard, the chemical composition of the Gr2 titanium tube is as follows: Ti: residual;In the content of impurity, N is less than 0.03%;C 0.08% or less;H 0.015% or less;Fe 0.30% or less.The single impurities of other elements are less than 0.1% (including aluminum, alum, tin, chromium, molybdenum, niobium, zirconium, hafnium, bismuth, palladium, copper, copper, silicon, cobalt and thallium).The total impurity of other elements is less than or equal to 0.4%.Mechanical energy: tensile strength is greater than 345Mpa.Yield strength is greater than 275 Mpa;The elongation rate is greater than 20%, and the main characteristics of the titanium tube for desalination are: 1. The density is small, the density of metal titanium is 4.51 g/cm3, which is higher than the strength (strength/proportion), which is higher than aluminum and lower than steel, copper and nickel.But the strength is at the top of the metal, three times as much as the stainless steel, and 1.3 times the aluminum alloy.2. Good corrosion resistance titanium is a very reactive metal with a low equilibrium potential and a large thermodynamic corrosion tendency in the medium.In fact, titanium is stable in many mediums, such as titanium in oxidizing, neutral and weak reductive medium.This is because has a great affinity, titanium and oxygen in the air or oxygen medium, and generate a dense layer of titanium surface oxidation film, strong adhesion, large inertia, protect the titanium substrate from corrosion.Even mechanical wear and tear will soon heal or regenerate.This indicates that titanium is a metal with a strong passivation tendency.Medium temperature under 315 ℃ titanium oxide film has always been to maintain this feature.3, the coefficient of thermal conductivity of good heat transfer performance of titanium than low carbon steel and copper, but due to the excellent corrosion resistance of titanium, so wall thickness can be thinned greatly, and the surface and the heat exchange way as the dropwise condensation of steam, reducing the heat group, too surface scaling can reduce thermal resistance, made of titanium heat exchanger performance improved significantly.4, heat resistant performance is good, the new titanium alloy at 600 ℃ or higher temperature for long-term use.5. High temperature and low temperature of the chemical industry, titanium alloy TA7 (ti-5al-2.5 Sn), TC4 (ti-6al -4V) and ti-2.5 zr-1.5mo, and other low-temperature titanium alloys, whose strength increases with the decrease of temperature, but not the plastic change.The strength of tensile strength and its yield strength are similar to that of titanium, indicating that the strength ratio (tensile strength/yield strength) is high, which indicates that the metal titanium material is of poor plastic deformation during forming.Due to the ratio of the yield limit to the elastic modulus of titanium, the elastic ability of titanium is large.Three, seawater desalination equipment of titanium tube will gradually replace the old copper alloy tube, both, compared to the titanium tube has the following advantages: 1, the same operation condition, the titanium tube wall thickness is thinner and less dosage of tubing.Generally, the wall thickness of copper alloy tube is 0.9mm- 1.2mm;Replace with titanium tube, in corrosive small place, usable wall thickness is 0.5mm thin wall tube.2. Good thermal conductivity of titanium tube.Titanium thermal conductivity is 17W/(m · k), aluminum brass is lOOW/(m · k), 70/30 white copper is 29W/(m · k), and the thermal conductivity of titanium is the smallest.But using thin-walled titanium tubes, the thermal conductivity is worse than aluminium brass, but is comparable to that of 90/10 copper, which is better than 70/30 copper.3. The use of titanium tube is more cost-effective.Titanium tube prices can compete with copper alloy tube, due to the low density of titanium, wall thickness at the same time, the same length of titanium tube quality is only 50% of the copper alloy tube, when 50% of the wall thickness for copper alloy titanium tubes, the same heat transfer area of titanium tube quality was only about a quarter of copper alloy tube.So titanium is competitive in terms of price.4. The service life of titanium tube is longer.As the seawater is often mixed with silt and sea life, their adhesion in the heat transfer tube and the end of the tube will corrode the copper alloy pipe, and the copper alloy will be corroded by br-corrosion in seawater.The titanium tube does not have this problem, especially to kill the bacteria in the seawater, and when it has to be injected with oxygen, it is necessary to use the corrosion resistant titanium tube.