The difference and use of white titanium mesh and black titanium mesh:

1. Common points of materials:

Both white titanium mesh and black titanium mesh are produced by pure titanium wire. The grade of ERTi-5 Titanium Welding Wire is usually TA1, which has the advantages of high elongation, high titanium content, high mechanical strength and easy processing.

2. Common points of craftsmanship

The processing methods and machinery are exactly the same—all are weaving with plain square holes, and the raw material wire diameter, material, elongation, tensile strength testing methods and testing instruments are the same. They are all produced by mechanical processing of shuttleless woven nets. Warp knitting, mesh leveling, and laser cutting processes are the same.

Third, the common points of packaging

The same packaging is used: the inner packaging is made of air bubble cushion for waterproofing, and the outer packaging is packed in a glued wooden box to prevent squeezing and collision.

Fourth, the only difference

The only difference is the surface: the white surface has no impurities, and the black surface has a layer of brushed graphite emulsion.

Five, use

The white titanium mesh surface does not contain any impurities. It is suitable for the ion-exchange membrane electrolyzer ERTi-2 Pure Titanium Welding Wire anode, anodizing experiment, catalyst carrier support mesh, pure chemical liquid filter mesh and other non-contaminated solutions.

The surface of the black titanium mesh contains a brushed graphite emulsion coating, which is suitable for seawater desalination titanium filter and chemical filtration. The surface coating can slow down the corrosion of the titanium substrate and prolong the service life.

Precautions for installation and transportation of titanium pipes and titanium pipe fittings!

1. When installing titanium and titanium alloy pipes, please pay attention not to contact or collide with iron materials when transporting and storing titanium and bending titanium tubing.

2. The cutting of titanium and titanium pipes should adopt mechanical methods, and the cutting speed should be low; when titanium pipes are cut or reground with grinding wheels, special grinding wheels should be used; flame cutting should not be used, and the bevel should be processed by mechanical methods.

3. Inert gas shielded welding or vacuum welding should be used for the welding of titanium welded pipes. Oxygen-acetylene welding or carbon dioxide gas shielded welding should not be used, and ordinary manual arc welding should not be used.

4. When installing titanium and pipes, no iron tools and materials should be used to knock or squeeze; rubber plates or soft plastic plates should be padded between carbon steel supports, hangers and titanium, and titanium exhaust tubing to prevent them from interacting with each other. Titanium and titanium alloy pipelines are in direct contact; when titanium and titanium pipelines pass through walls and laminates, sleeves should be installed, the gap should not be less than 15mm, and the insulation should be filled. The insulation should not contain iron impurities.

5. Titanium and titanium pipes should not be directly welded to other metal pipes. When the connection is required, a loose flange connection can be used. The non-metallic gaskets used are generally rubber gaskets or plastic gaskets.

Corrosion resistance of titanium forgings and TA9 titanium alloy in atmospheric seawater environment

Titanium is a very active metal, its equilibrium potential is very low, and the thermodynamic corrosion tendency in the medium is high. But in fact, titanium is very stable in many media. This is because titanium has a high affinity for oxygen. In an oxygen-containing environment, a dense, strong adhesion and inert oxide film will be formed on the surface of Molybdenum Sputtering Target, thereby protecting the titanium matrix from Corroded; even if it is mechanically worn, it will quickly regenerate, which shows that titanium is a metal with a strong tendency to passivation. The outstanding performance of titanium is that it has extremely high corrosion resistance in fresh water and seawater. The corrosion resistance in seawater is better than aluminum alloy, stainless steel and nickel-based alloys. The dense oxide protective film with high chemical stability formed by titanium and oxygen ensures its high corrosion resistance in low and high temperature gases. At room temperature, titanium does not interact with chlorine, dilute sulfuric acid, dilute hydrochloric acid, nitric acid and chromic acid. It has high corrosion resistance in alkaline solutions and most organic acids and compounds, but it can be affected by hydrofluoric acid, phosphoric acid, Molten alkali erosion.

Seawater contains more than 10 kinds of ions such as Na+, K+, Mg²+, Cl-, etc., which is highly corrosive. The materials used in the ocean should generally be able to withstand the corrosion of the ocean atmosphere, seawater, tides (atmosphere and seawater alternately) and sea creatures, and also withstand seawater erosion and periodic impact of waves, so the material should have good corrosion resistance And better comprehensive mechanical properties. In addition, if the equipment is to float in water, low density and high strength are also very important. Experiments show that steel, stainless steel, copper, and aluminum are all non-corrosive materials in the marine environment, and coatings or other protective measures must be used when using them. Only titanium is a structure that is very corrosion-resistant and does not need coating protection. Material. Seamless Titanium Tube Grade 2 is also a material conducive to obtaining the most buoyant structure. The static pressure of sea water increases by 10.1kPa for every increase of 1m of water depth. In order to make the shell strong enough at a given water depth, the wall thickness of the shell must be increased.

Although titanium is a thermodynamically unstable metal, its standard potential is -1.63V (SHE), but due to the passivation effect of the oxide film, its corrosion potential is largely positively shifted. The self-corrosion potential of drinking in natural water at 25°C is about 0.1V (SCE). The titanium film has very good self-healing properties. When the film is damaged, it can be quickly repaired and replaced into a new protective film. Therefore, titanium can maintain its state in oxygen-containing liquids and non-ion-containing solutions.

In the marine environment, the drink is resistant to both uniform corrosion and local corrosion. Laboratory and engineering practices have shown that titanium has not been tested for significant corrosion after many years of exposure to seawater at different depths. Even if there are encroachments on the surface of the drink, crevice corrosion and pitting corrosion will not occur. The presence of sulfides in seawater does not affect the corrosiveness of the drink. Grade 9 Ti-3Al-2.5V Titanium Sheet does not have corrosion problems in the ocean atmosphere, flying test area and tidal range. Titanium can resist the erosion of high-speed seawater. The suspended friction particles in the seawater are very harmful to copper or aluminum alloy, but have little effect on titanium. Titanium has been recognized as one of the best anti-cavitation corrosion metal materials in seawater. Because titanium is not toxic to marine organisms, marine organisms attach to the surface of titanium more commonly, the titanium under the marine organisms does not undergo crevice corrosion and pitting corrosion, and the surface still maintains the integrity of the corrosion-resistant oxide film. Titanium hardly occurs in seawater pitting corrosion and crevice corrosion, so titanium is the most suitable material for seawater. Therefore, whether it is in still seawater or high-speed flowing seawater, whether it is clean seawater or polluted seawater, or even seawater containing a lot of mud and sand, titanium can maintain its state of transformation and exhibit excellent corrosion resistance.

Application of Titanium Alloy Material in Standard Parts of Aviation Titanium Alloy Screw

Titanium and titanium alloys have a series of outstanding advantages such as high specific strength, good corrosion resistance, and high-temperature resistance. They have developed into a promising metal structure material 121 in the modern aerospace industry. Since the United States first applied Ti-6AI-4V titanium alloy bolts to the B-52 bomber in the 1950s and achieved very good weight-reduction effects, various developed countries in the aviation industry have launched titanium alloy fasteners. Research and engineering applications.

The positive potential performance of the titanium alloy matches the carbon fiber composite material, which effectively prevents the galvanic corrosion of the fastener. It makes the titanium alloy the best connection material for the composite material. Therefore, with the continuous increase in the amount of Gr23 Ti-6Al-4V ELI Titanium Pipe and composite materials used in advanced military and civilian aircraft, the demand for titanium alloy fasteners is increasing. The use temperature of titanium alloy is 150-200C higher than that of aluminum alloy. For parts where aluminum alloy fasteners cannot be used due to the high operating temperature in the aircraft structure, titanium alloy will be a better choice. In addition, the inherent good elasticity and non-magnetism of titanium alloys also play a very important role in preventing the loosening of fastening bolts and preventing magnetic field interference.

In the US military and civilian aircraft, Gr7 Ti-0.2Pd Titanium Sheet has basically replaced alloy steel fasteners. The application of titanium alloy fasteners abroad has been very common. The amount of single titanium alloy fasteners for large civil aircraft has reached hundreds of thousands. At the same time, various new types of titanium alloy fasteners have also been continuously developed. In the late 1990s, with the introduction of foreign third-generation heavy fighter production lines and the development of domestic third-generation fighters, as well as the development of Dazu aviation subcontracting production, some titanium alloy fasteners began to be used in China's aviation industry. In recent years, with the development of China's aerospace industry, relevant domestic units have carried out a large number of research and development work on basic materials and fastener manufacturing technology. At present, the titanium alloy fasteners independently developed and produced in China have been in China. A large number of engineering applications have been obtained in modified aircraft and newly designed aircraft.

The main grades and common products of titanium alloy forgings for aviation

titanium forged discs are mainly used in aircraft engine parts because of their good corrosion resistance and high heat resistance. Specifically, the titanium alloy forgings used on the space shuttle mainly include: high-pressure vessels, wing leading edges, oil pressure pipelines, engine thrust brackets, etc. As a professional manufacturer of titanium alloy forgings, HST TITANIUM provides gr2, gr5 and other grades all year round. The executive standards are GB/T16598, ASTM B381, AMS4928 titanium forgings.

Application function of titanium alloy plate in the petrochemical industry

Titanium alloy plates and titanium plates are mainly used to manufacture various containers, reactors, heat exchangers, distillation towers, pipes, pumps, and valves in the petrochemical machinery manufacturing industry. Titanium can be used as a titanium cathode and condenser in power stations, as well as environmental pollution control devices. The hardness of steel is higher than that of titanium plate, but the specific strength or tensile strength of Grade 5 Ti-6Al-4V Titanium Foil is higher than that of high-quality steel. Titanium alloy has good heat resistance, low-temperature toughness, and fracture toughness, so it is mostly used as aircraft engine parts and rocket and missile structural parts. Titanium alloy can also be used as fuel and oxidant storage tanks and high-pressure vessels. There are already automatic rifles, mortar seat plates, and recoilless gun launch tubes made of titanium alloy.

1. Memory function

Titanium-nickel alloy has one-way, two-way, and omnidirectional memory effects at a certain ambient temperature, and is recognized as the best memory Titanium Flat Washer DIN 125. Pipe joints used in engineering for the hydraulic system of fighter jets; oil pipeline systems for oil complexes; 500mm diameter parabolic mesh antennas made of 0.5mm diameter wires for aerospace vehicles; used in medical engineering for snoring Treatment; Titanium plates are made into screws for fracture healing and so on. The above applications have achieved obvious results.

2. Superconducting function

The niobium-titanium plate exhibits a zero-resistance superconducting function when the temperature is lower than the critical temperature.

3. Hydrogen storage function

6al4v titanium alloy bar-iron alloy has the characteristic of absorbing hydrogen, which can store a large amount of hydrogen safely, and release the hydrogen in a certain environment. This is very promising in hydrogen separation, hydrogen purification, hydrogen storage and transportation, and the manufacture of heat pumps and batteries that use hydrogen as energy.

Titanium dioxide, the oxide of the titanium plate, is a white powder and a better white pigment, commonly known as titanium white. In the past, the main purpose of mining titanium ore was to obtain titanium dioxide. Titanium white has strong adhesion, is not easy to undergo chemical changes, and is always white. Especially valuable is that titanium dioxide is non-toxic. It has a high melting point and is used to make refractory glass, glaze, enamel, clay, high-temperature resistant laboratory utensils, etc.

Titanium consumption of aero engine

The amount of titanium used in advanced foreign engines is usually kept at 20% to 35%. The early turbojet engines produced in my country did not use titanium. The turbojet 13 engine, which was developed in 1978 and was designed and finalized in early 1988, used 13% of titanium. For aero engines with intellectual property rights, the amount of titanium has been increased to 15%, and my country’s first turbofan engine with independent intellectual property rights, which is about to be designed and finalized, has further increased the amount of titanium to 25%.

In the design of airplanes or engines, the alloy grades are mainly selected according to the working temperature and stress level of the parts, and the corresponding molding and welding performances are considered in conjunction with the manufacturing process plan of the parts. The characteristics of different types of Titanium Welding Rods are different, and the specific parts used are also different: α-type alloys cannot be strengthened by heat treatment, and have only moderate room temperature strength, but the structure is stable, the creep resistance is good, and it can work stably at higher temperatures for a long time. It is the basis for the creation of new heat-resistant titanium heat exchanger pipe, and is generally used as sheet metal parts and forgings with greater bearing capacity; β-type alloys have good process plasticity in the solid solution state, which is convenient for processing and forming, and can obtain high strength after aging treatment Performance, but high sensitivity to impurity elements, unstable structure, low heat resistance, not suitable for use at high temperatures, generally used as fasteners and aircraft structural parts; α + β type alloy has good thermal strength and cold Formability, good overall performance, and can be quenched and aging strengthened, generally used as turbine engine body components.