Performance requirements of coating targets for hard coating

The performance requirements of the coating target for hard coating are mainly the requirements for the thermal conductivity, electrical conductivity and thermal expansion coefficient of the sputtering target. The temperature of the target increases due to sputtering, the higher the thermal conductivity, the faster the heat transfer, the better the evaporation effect of the target ions, and the higher the deposition efficiency; the smaller the difference between the thermal expansion coefficient of the target and the substrate, the more Well, to reduce the effects of thermal stress.

To sum up, the technical requirements for coating Zirconium Sputtering Target for hard coatings include target purity, density, composition and structural uniformity, etc.; the performance requirements are mainly for the thermal conductivity, electrical conductivity and thermal expansion coefficient of sputtering targets. Require.

Does Titanium Burn?

As we all know, the melting point of titanium is 1660.0°C, which is not easy to burn, but titanium is also easy to burn in the following environments:

1. When the titanium material is in contact with an open flame when it is in contact with air and samples, and the temperature exceeds 500 or 1200 degrees, the titanium will burn.

  2. In dry chlorine gas, even if it is below zero, a violent chemical reaction will occur to form titanium tetrachloride, which will be decomposed into titanium dichloride and even burned.

  3. Titanium materials may burn after contacting methanol, trichloroethylene, molten metal salt, and other media.

Therefore, Grade 3 Pure Titanium Sheet materials should avoid the above media during use.

Application of titanium rods and titanium alloy materials in the human body

Titanium Industrial Rod is a very common substance, and the purity of titanium sponge can reach 99.9%. The physical and chemical properties of titanium are very stable, it will not be absorbed by the human body, and it will not undergo chemical reactions when in contact with body fluids and drugs, nor will it be ionized, nor will it react with the musculoskeletal muscles of the human body, so it is called "biophilic". Metal". Because titanium is "biophilic", titanium can resist the corrosion of secretions in the human body and is non-toxic, and it is suitable for any sterilization method. Therefore, it is widely used in the manufacture of medical equipment, human hip joints, knee joints, shoulder joints, flank joints, skulls, active heart valves, bone fixation clips, biomedical titanium materials (basic materials: medical titanium rods, medical titanium plates, medical titanium Silk) is an important branch of medical materials science, mainly used to treat or replace human tissues, organs or enhance their functions, and is a new type of carrier material with high technical content and high economic value. When new muscle fiber rings are wrapped around these "titanium bones", these titanium bones begin to maintain the normal activities of the human body.

Therefore, the potential demand in the biomedical materials market is huge. As the first choice of biomedical materials - the demand for medical titanium and titanium alloys will also increase greatly, so it is imperative to increase the research and development of medical titanium materials.

What are the types of corrosion of titanium tubes?

The corrosion form of Grade 2 Pure Titanium Tube includes two categories: general corrosion and local corrosion: general corrosion is a form of corrosion that is comprehensive and uniform; local corrosion is a form of local corrosion relative to general corrosion. It can also be divided into: crevice corrosion, point corrosion Corrosion, stress corrosion cracking, galvanic corrosion, abrasion, hydrogen absorption and hydrogen embrittlement.

1. Crevice corrosion: The corrosion phenomenon that occurs at the flange or fold and the gap near the accumulation, generally occurs in the narrow gap.

2. Pitting corrosion: Corrosion that occurs during opening, such as the corrosion phenomenon caused by the presence of halogen ions such as C1-, B-, I-, etc.

3. Stress corrosion cracking: In a specific environment, due to the action of tensile stress, a kind of brittle failure occurs.

4. Abrasion: The phenomenon that the fluid promotes electrochemical corrosion due to mechanical action.

5. Galvanic corrosion: also known as dissimilar metal contact corrosion, it is a phenomenon in which the metal with the lower potential is promoted to corrode under the condition of electrical short circuit.

6. Hydrogen absorption and hydrogen embrittlement: take hydrogen out of the material, and when the amount of hydrogen taken out exceeds the solid solution limit of the material, brittle hydrides will be formed, resulting in hydrogen embrittlement.

What must be guaranteed when welding titanium tubes?

Titanium tube welding is a TiG welding process that uses inert gas to effectively protect the welding area. Due to the special physical and chemical properties of titanium, its welding process is quite different from other metals. Titanium tubes have high strength, good plastic toughness, and corrosion resistance, and are more and more widely used in aerospace, shipbuilding, and chemical industries. In order to make better use of titanium tubes, it is necessary to master their weldability.

When welding Grade 9 Ti3Al2.5V Titanium Tube, it must be ensured that:

1. The metal in the welding zone will not be polluted by active gas N, 0, H and harmful impurity elements C, Fe, Mn, etc. above 250 °C.

2. Coarse-grained structure cannot be formed.

3. Can not produce large welding residual stress and residual deformation. Therefore, the welding process must follow the predetermined construction sequence, strictly follow the process quality management standards, and implement quality control of the whole process. Make the factors of man, machine, material, and method in a well-controlled state, so as to ensure the welding quality of titanium tubes within a reasonable construction period.

Matters needing attention in the cutting process of titanium tube

ASTM B861 25*1.2mm Titanium Tube For Chemicals are generally divided into two types, one is the extruded type called seamless titanium tube; the other is welded type called welded titanium tube.

1. If it is semi-automatic cutting, the guide rail should be placed on the titanium tube plane, and then the cutting machine should be placed on the guide rail, and the order should not be reversed.

2. The cutting parameters should be appropriate, and should be reasonably determined according to the thickness of the titanium heat exchanger tubing, so as to obtain a good cutting effect.

3. Check whether the cutting gas is unobstructed. If there is a blockage, it should be unblocked in time.

4. Before cutting, the surface should be cleaned and some space should be left, which can facilitate the blowing out of slag.

5. The distance between the cutting nozzle and the surface of the titanium tube should be appropriate, too close or too far is not good.

6. Preheating should be sufficient so as not to affect the cutting process.

7. If cutting workpieces of different sizes, the small ones should be cut first, and then the large ones.

Application of Titanium Petroleum Accessories

Under the conditions of petroleum machinery processing, titanium alloys can be used to manufacture the following titanium equipment: titanium heat exchangers, filters (settlers), storage tanks for storing petroleum and petroleum products, locking devices, sewage pipelines, and rough oil pipelines.

Certain petrochemical companies and petroleum processing industries have experience in manufacturing and using titanium alloy equipment. For example, the Moscow Petroleum Processing Plant manufactured the following equipment from BT1~0 titanium alloys: propylene polymerization reactors, pulsators for decomposers, condensers, and sieve washing towers.

Titanium Alloy Rectangular Tube-lined vessels are used for evaporation (concentration) or distillation or for reactions in weak acids or other chloride-containing solutions, followed by nitriding of organic materials with nitric acid and other chemical reactions with oxidizing media. As the container used for the reaction, a container with a titanium liner can also be used. Both the solution containing chromic acid and the chromic acid solution for sulfidation can be selected according to the reaction temperature needs of this titanium-lined container.

It has been proved in a certain application range in the field of the chemical raw materials industry that copper and other solutions containing vapors are used to catalyze the oxidation of carbon and chlorine compounds, and it can be used as a catalyst when it has a certain pH value. Then at about 150~200t: When catalyzing at a temperature of t, corresponding equipment must be installed, and acetaldehyde production equipment made of titanium is widely used. Grade 9 Ti-3Al-2.5V Titanium Plate-lined towers, piping, valves, and acid pumps consisting of rotors and stators are all made of engineered pure titanium. Distillation columns are often used for the purification of acetic acid, and most of the fractionation stages include assemblies made of titanium. Such as the middle layer and connecting parts of the tower used in the distillation device.

The coil heater, which prevents the formation of metal sulfates, is proven to increase heat transfer by 30% compared to an aluminized copper coil heater. For the urea reactor, in order to obtain (recover) carbon black and relieve stress, a reaction tower with a diameter of 43m and a length of 8.2m that withstands a temperature of 120T and a pressure of 130kPa should be used. The reaction tower should reduce the gas and other gases. pressure, this device is made of titanium.

The application field of titanium is further extended to the crude oil and petroleum processing industry, and the desalination equipment for producing freshwater or drinking water from seawater or the equipment for producing organic acid all use titanium. At the same time, the pumps, pipes, and heat exchangers made of welded titanium tubes have been tested to be reliable and durable. When copper is electrolyzed, a titanium plate is used to manufacture a titanium seed plate for the cathode.