In addition to chemical impurities vanadium titanium tube

Vanadium and  titanium tubing grades  and a small amount of impurities mainly VOCl3 discretion VCI4, their presence makes TC4 titanium tube yellow. In addition to the purpose of refining vanadium, not only for bleaching but also for oxygen. This is an extremely important part of the refining process.
     TC Titanium  and vanadium impurities ask discretion tube boiling point difference and relative volatility are relatively small, such as a two-component system titanium tube -VOCl3 boiling point difference is 10 ℃, the relative volatility of d = 1.22; and TC4 titanium alloy tube -VCl4 two lines boiling point difference of 14 degrees Celsius. Nevertheless, in theory, the use of physical methods are possible in addition to vanadium impurities, such as efficient use of the rectification column in addition to vanadium. The advantage of this method is that without the use of chemicals, refined enough continuous production process, easy to automate, isolated VCl4 VOCl3 and can be used directly. The disadvantage is that the energy consumption, large investment in equipment, but also need to address the structure of power kettle, put have not been applied in industry.
    In addition, TC4 titanium tube -V0Cl3 freezing point line two quite different points, a difference of about 54 degrees Celsius, and therefore can be used in addition to freezing crystallization VOCI3 but the energy consumption is frozen
Large, so it did not get industrial applications.
    For this reason is often used in addition to chemical vanadium. Vanadium is a chemical method in addition to adding a chemical reagent in a titanium tube, so VOCl3 (or VCl4) impurity selective reduction or selective precipitation alum form insoluble compounds and TC4 titanium alloy tube separated from each other or the selective adsorption of VoCl3 ( or VCl4), vanadium impurities and TC4 titanium alloy tube separated from each other; or selective dissolution of VOCl2, so alum 7icld impurities and separated from each other. We can say that a low-technology equipment simply better long costs, labor conditions are good, but easy to achieve continuous operation in addition to vanadium process has not been established. This is also the TC4 titanium tube refining process requires study.

Titanium tube process factors affect the performance of the form

 When titanium tube forming process parameters on the factors of porous materials are size, size distribution, pressure and so on. If you want the system to take a large aperture and high permeability of porous material, should use a large powder grain size; and vice versa. The porous material should use a narrow particle size distribution of the powder, which is due to the presence of arch effect, will increase the porosity. Porous materials such as the use of spherical powder, to improve the permeability is advantageous. Pressure on the molding process parameters influence. With the molding pressure increases, the article porosity and permeability decreases.
    When  Powder coating titanium  forming process parameters influencing factors dense material has a particle size, size distribution, pressure and so on. In contrast with the porous material, preparation of the selection process of the mixed powder, namely a broad particle size distribution of powder compaction as well, often used in less than 150um (100 mesh) size fraction of the powder. Such fine powder easily pressed into the coarse pore, when pressed compacts dense, high bulk density. If the powder particle surface uneven, more angular, for repression is beneficial. Pressure forming impact, but the impact is not very significant. As the pressure increases, the beneficial increased denseness products, reduce the product porosity.
     Sensor Titanium housing  is a loose powder or sintered compacts at high temperature by metallurgical bonding process to form a dense or porous articles. Sintering the powder particles to achieve strong binding body, and the mixed powder is alloyed. Typically the sintering temperature is lower than the melting point of the main component.

Preparation of titanium hydride dehydrogenation how the tube surface purification

 Hydrogenation dehydrogenation (HDH) titanium titanium tube preparation process used materials are not limited to titanium sponge, you can also use scrap,  Gr5 titanium forged ring  scrap and residues of titanium scrap, so it is a good way to feed the energy utilization of disability. The process of this method is relatively simple, the main process is:
    Titanium material - Surface Purification - Hydrogen Industry - smash a screening a dehydrogenation a screening a mixed batch of a group of a titanium tube vacuum packaging a commodity.
    If the raw material for titanium sponge, because the surface is clean, you do not need to go through the surface purification. Surface purification, a key step in the hydrogenation, dehydrogenation and crushing, screening for the law. Hydrogenation and dehydrogenation typically use vertical or horizontal resistance furnace. Mechanical vacuum pump or the unit must be large mechanical displacement. Titanium metal surface, particularly the presence of residual titanium surface layer of oxide film, the surface of this layer of oxide film on titanium hydrogen absorption rate is large, it is the degree of influence depends on the temperature when the oxide film. Therefore, before performing hydrogenation, the general need for surface purification.
    In order to eliminate the influence of a surface oxide film of the hydrogen absorption process, the  Grade 9 Titanium components  can be in a vacuum or hydrogen heat treatment, when heated to 700-850 ℃, titanium oxide diffused to the surface of the pipe inside the metal, titanium tube after treatment The hydrogen absorption rate greatly increased. However, this method during the heat treatment of the oxide film and the end of the elimination of the oxygen, but enters the inside of the metal, it will not only reduce the hydrogen diffusion rate of the metal interior, and oxygen will go into the final product, thereby reducing product quality; while heating process the particles of titanium tube will cause some degree of sintering, lowering its hydrogen absorption rate.
    Chin reasonable way to eliminate the surface oxide film is chemical treatment. First, put it in 2% sodium hydroxide was heated to melt NaoH 330-425 ℃, processing 15min, at this time the surface of TiO2 titanium tube is reduced to Ti0, but also with the generated Ti0 base reaction:
    Ti0 ten 2Na0H = Na2Ti03 ten H2
    After the thus-treated surface of titanium tube becomes loose porous, it is easily dissolved in a solution containing nitric acid or sulfuric acid or HF in NaF. After acid-soluble titanium tube surface oxide film will be completely eliminated. However, during the chemical treatment, should minimize the loss of Chin. If the surface contamination is not serious, there is no need for such treatment, but must be cleaned to remove oil. If the oxide film is thick, should dilute HF-HNO3 acid mixture cleared. When the acid, the reaction is severe, the need to minimize the loss of dissolved titanium tube promptly removed and washed with water.
    If the oxide film becomes very thick oxide must eradicate oxide. Available methods are sandblasting and other mechanical methods, and then remove the oxide film by pickling.

Situation casting alloy of titanium tubes and pipes

With the demand for the development of the aerospace industry to expand titanium alloy tube and pipe casting range and further promote the development and improvement of the casting process, the late 1980s and has developed from a single piece casting to or from a few dozens of pieces and the whole cast together. Currently, large thin-walled cast iron alloy castings whole complex has reached the maximum diameter of 1300mm, maximum mass of more than 180kg, such as the GE90 engine fan case. Now  titanium tubing for sale  and titanium pipe casting, whether it is an alloy, casting and casting equipment and quality assurance (including various test castings, tools, handling equipment, etc.), have reached a more perfect level, basically meet the various industrial applications. Designers have considered or are considering the titanium tube castings coefficient increased from 1.5 into a titanium tube and titanium pipe foundry's basic situation and the ability of some developed countries of the world 1.20 1990s can be analyzed contrast.
    The mid-1990s, the domestic  titanium square tubing  casting has been developing rapidly. Currently engaged in the research and production of titanium tube casting units have reached more than a dozen.
    China's current level of technology and quality of the cast alloy castings casting a single piece of pipe has reached the international advanced level. Large quantities of the golf club head castings and civilian have been exported abroad, but the country as a whole casting technology and casting quality point of view, especially for large complex thin-walled castings and casting the whole grid quality inspection techniques; China and major countries in the world level there is still a wide gap.

Demand for ships and marine engineering titanium

 For high-strength titanium alloy, corrosion resistance, is manufactured ships, boating fine material, which not only improves navigation performance, and can significantly extend life. It was reported that since the beginning of the seventies, the Soviet Union built with titanium as the main hull material of nuclear submarines, each ship with titanium reached 3000t, used as a type of all grades of titanium alloys, such as Ti-4Al, Ti-5Al, Ti a and Ti-5Al a 2.5Sn 2A1-2.5Zr, etc. This is because a type alloy has good forming and welding performance.
    Titanium can also be used to make the seabed detection and scientific research submersible. Britain, Japan, Sweden and other countries have produced benefits or are under construction submersible to a depth of 6000m, the submersible. This submersible thickness of 60-70mm, estimated that at least with 10t titanium.
    Because  precision titanium products  pigment flow of seawater penetration capability Shi erosion corrosion, it also applies to the manufacture of oil-based devices to talk, talk eyebrow produced 104t of fresh water means more than sixty thousand titanium root canal.
    Titanium and titanium alloy as a new, high-strength corrosion resistant material, the last ten years, the application of industrial development in the civilian city very rapidly, especially in China, the current 80% of titanium production for civilian industry, including electricity , petroleum, chemical, metallurgy, medicine, sports, and food industries. With the decline in the price of titanium,  Titanium tube fittings design development, production, processing technology, the use of accumulated experience, the civilian sector with the prospect Chin is very broad.

Titanium Alloy - Product Description