Titanium surface treatment modification technology

1. Aviation

The largest user of titanium materials in the past and now is the aviation industry. Now titanium and titanium alloy materials are widely used in both military and civil aircraft, and the amount directly affects the rise and fall of the titanium industry. If the world economy enters a recession, it will directly respond In the world's aviation industry, there are fewer people traveling by plane, and the aviation industry of various countries is in decline, and there will be fewer aircraft orders and less titanium consumption. After the September 11 incident occurred in the United States in 2001, the world aviation industry had a short period of low ebb and short-term adjustments. As a result, the titanium industry also shrank for a period of time. At present, the United States is experiencing a storm of subprime debt, which has caused the economy to be in turmoil and again. During the period of slow recession, the world economy was also affected to a certain extent, but it is not yet clear how much impact it will have on the titanium industry. Titanium is mainly used in aircraft in the following places.

(1) It is the engine. The amount of titanium used in each engine accounts for 20-30% of the total weight of the engine. It is mainly the components of the compressor, including blades, hubs, inlet guide valves, and shells.

(2) It is the aircraft skeleton. Titanium is used in this area. Because of the high specific strength of titanium alloy, titanium is the first choice among all metal materials. Everyone knows that our country also needs to manufacture large aircraft, one of which is very important. The hardware is a large-tonnage forging machine. The largest titanium alloy dies forging machine in the world is currently 75,000 tons in Russia. Now a project has been established in Yanliang, Xi’an, and an 80,000-ton die forging machine is prepared. The first phase For the 40,000-ton project, the investment will be 195 million yuan and it will be put into operation at the end of 2009. The second-phase project will be 80,000-ton, and the investment will be 850 million yuan. What material is forged by these die forging machines? It is the aircraft frame made of titanium alloy. Especially the middle and rear sections of the rack. The middle section is the connecting section of the wing and the fuselage, which is the most stressed part of the frame, and the rear section is the installation part of the engine, which is also an important part of the force.

(3) Landing gear. Support frame, etc. Many aeroplane crashes are at the time of take-off and landing. Because the load and impact force of the aeroplane is very large when taking off and landing, the requirements on the landing gear are very high. The choice of titanium alloy not only guarantees the performance requirements of high strength and impact resistance but also is lighter than the choice of high-quality steel.

(4) It is the riveting parts for the wing skin and internal fixation. Some aircraft choose titanium as the wing skin, mainly some military aircraft. There are tens of thousands of rivets and fasteners on an aircraft. Our country produces cold There are three or four professional standard parts factories for hot rivets and fasteners. Their factories only produce various types of bolts, nuts and rivets, most of which are made of titanium and titanium alloy materials.

2. Medical applications

There are two main applications of titanium in medicine, one is pharmaceuticals, and the other is human implants.

(1) Application of titanium equipment in the pharmaceutical industry

In the pharmaceutical production process, the equipment is exposed to hydrochloric acid, nitric acid, acetic acid, sulfuric acid and its salts, and organic solvents and other media, causing serious corrosion of the equipment. If production is stopped frequently for maintenance, production will be affected, and the corrosion of equipment will directly affect the quality of medicines. Therefore, many pharmaceutical companies now use titanium materials for air drying devices, pipes, screw feeders, heaters, and cyclones in pharmaceutical equipment. On the one hand, the corrosion rate is only 0.008—0.003mm/a, and the most important thing is that It is ensured that the quality of the medicine will not be affected by the corrosion of the equipment.

(2) Application of titanium materials on the human body

Because titanium has higher strength, lower modulus, and good biocompatibility, it has now become a common medical substitute for human bones. Titanium is used to make hip joints, elbow joints, bone screws, knee joints, and bone plates. .Dental implants (that is, dental implants in dental hospitals, the price is very high), denture brackets, crown bridges, and orthodontic wires, surgical instruments, heart rhythm regulator boxes, etc. Even now it has developed into titanium alloy precision cast prostheses. Some children have irregular teeth and need to be corrected. The dental hospital will use memory alloy wires made of titanium-nickel alloy for correction. Some people have narrow blood vessels in a certain part, and doctors will recommend implanting blood vessels made of titanium. The stents can now be replaced with titanium materials from head to toe. There is a 68-year-old Peter Horton in the United States who has serious heart disease. In order to save his life, the doctor installed a titanium device in his heart. , To help his heart pump blood. He lived on this device for another seven and a half years, becoming the longest person living with an artificial heart. However, medical titanium materials are the most stringent and critical in terms of quality requirements, especially the metallographic requirements can be said to be the most stringent, higher than the military requirements. Neither can there be segregation at low magnification, and the structure of high magnification must be very uniform.

Grade 9 Titanium Plate     titanium sheet     Zirconium Sputtering Target     Titanium Aluminum Sputtering Target

Method for burr treatment of titanium rod, titanium plate and titanium workpiece

Titanium alloy has many advantages such as low density, high specific strength, wide operating temperature range (-269~600℃), corrosion resistance, low damping and weldability. It is the best material for aerospace vehicles to reduce weight and improve overall performance. Application level is an important aspect that reflects the advanced degree of aircraft. Improving the comprehensive mechanical properties of aircraft and reducing costs are important measures to promote the application of titanium alloys in the aerospace field.

With the development of aerospace technology, the application range of titanium alloys in the aerospace field continues to expand. Titanium alloy structural parts are increasingly showing the trend of large size, thin-walled curved surface, variable thickness and overall structure, which further improves the aerospace industry. The performance and structural rigidity of the aircraft have reduced weight. Titanium alloy precision forming technology will be the research focus of aerospace manufacturing technology.

Precision forming refers to the forming technology that approaches or meets the accuracy requirements of the part after the part is formed. It is based on the technical achievements of new materials, new equipment, new technology, computer-aided process design, etc., and develops traditional forming technology to realize the product High-efficiency, high-performance, low-cost manufacturing technology with little and no margin, precision-formed parts have high geometric accuracy and surface roughness, precise shape and excellent mechanical properties. Titanium alloy precision forming technology is widely used in the aerospace field, and its use can significantly improve the comprehensive performance and support capabilities of aerospace products such as various combat aircraft, aero engines, strategic and tactical missiles, and launch vehicles. Analyze the application progress of precision hot forming (including precision casting, ultra-speed forming/diffusion bonding, precision spinning and laser direct rapid prototyping) technology in precision forming technology. These technologies can achieve near-net-shape production with a material utilization rate of up to 70% ~90%, has already highlighted a broad development prospect and good application value in the aerospace field.

Gr1 Pure Titanium Bar     ERTi-7 Titanium Welding Wire     Gr7 Ti-0.2Pd Titanium Pipe     Gr16 Ti-0.5Pd Titanium Pipe

The reaction of titanium in air is closely related to temperature.

Artificial joints and artificial bone substitute materials should have the following basic properties: lightweight, high-strength materials, biocompatibility and corrosion resistance, and the reaction of the implanted tissue in the body will not cause material deterioration, repeated stress-induced fatigue, and small damage. The most important properties of metal implants are shape, processing and polishing. They must remain functional during their expected life and will not degrade under fatigue, wear, corrosion and impact loads.

Titanium and titanium alloys meet all the above requirements. Artificial joint materials such as denture powder, polypropylene, plexiglass have low strength, are easy to break, and have poor biocompatibility. Later, stainless steel was used, but the proportion of stainless steel was greater, about twice the proportion of human bones. Under the action of body fluids, the human body would corrode and fracture. Cobalt-chromium alloy is also an excellent artificial joint material, but unfortunately, cobalt and chromium are toxic to the human body. Titanium and titanium alloys are ideal artificial joint materials, which have the advantages of small proportions (similar to the proportion of human bones), high strength, good workability, and corrosion resistance. Titanium materials used for surgical transplantation mainly include pure titanium and ti-6al-4veli alloy. In recent years, Ti-6Al-7Nb and Ti-13nb1-13zr have good compatibility with the human body and have passed the ASTM standard.

Titanium is an artificial bone on which cells can regenerate and bones can grow. Titanium has a good affinity with human bones, epithelium and tissues. In order to improve the surface quality of the implant material connected with the human bone, applying a bioceramic layer to the rough implant surface is also an effective method. At present, titanium and titanium alloys have been widely used in artificial bone joints, artificial bones, joint bottom plates, fracture fixators, bone marrow nails, artificial heart valves, skulls, etc.

Gr5 Titanium Bar     Gr36 Ti45Nb Titanium Wire     ERTi-23 Titanium Welding Wire     Gr2 Pure Titanium Pipe

How to improve the rate of titanium plate in mechanical equipment

Titanium screws have the highest price among screws of many materials. Why are titanium screws so expensive? Let's take a look at what kind of metal is titanium screw. In addition to its application in the screw industry, which industries are also used? Titanium screws have the characteristics of low density, high specific strength, good corrosion resistance, low thermal conductivity, non-toxic, non-magnetic, weldable, good biocompatibility, and strong surface decoration. It is a lightweight, high-strength, corrosion-resistant Structural materials are widely used in high-precision fields such as aerospace, medical equipment, sporting goods, and precision products.

1. Medical treatment: Titanium metal material is widely used in the manufacture of medical equipment, artificial hip joints, knee joints, shoulder joints, hypochondriac joints, cranium, active heart valves, and bone fixation clips. Before the use of titanium, medical orthopedics usually used stainless steel as a bone material. However, the use of stainless steel has a disadvantage, that is, it will rust. This has to be taken out after the bone is healed. However, this is for patients, It is a very painful thing.

After the use of titanium "artificial bones", the orthopedics technology is completely changed, and the stainless steel sheet is abandoned. You only need to use titanium plates and titanium screws on the damaged areas of the bones. After a few months, the bones will re-grow in the holes and screws of the titanium plates. The new muscle fibers are wrapped in the titanium plates, and the titanium bones It is connected to flesh and blood just like real bones, and plays a role of support and reinforcement.

Second, the field of sporting goods: the advantages of high strength and low density also make titanium widely used in the field of sporting goods. For example, high-quality bicycle frames and golf clubs are usually made of titanium, which is not only strong and durable, but also light in weight.

3. Application of titanium screws in aerospace and military fields. Titanium has very good durability, so in aircraft engines, bulletproof parts, strengthening parts, reinforcement parts, combustion chambers, turbine shafts, turbine disks, nozzles, etc., most of them are made of titanium alloy materials. It can be seen that titanium is a metal element. The best material for aircraft production.

Gr3 Pure Titanium Foil     Gr12 Ti-0.3Mo-0.8Ni Titanium Pipe     Gr5 Ti-6Al-4V Titanium Sheet     Gr2 Pure Titanium Plate

Empty titanium bar rolling

The light metal micro-arc oxidation surface treatment technology is a kind of direct in-situ growth of a ceramic film on the metal surface, which plays a role of protection and wear resistance. The core principle of this technology is to place Ti, Al, Mg and other light metals and their alloys in an aqueous electrolyte as anodes. Using electrochemical principles, under the combined action of thermochemistry, plasma chemistry and electrochemical processes, through control Current density and other technical process parameters, spark discharge is generated on the surface of the material, and the spark discharge phenomenon is used to generate micro-arc oxidation spots on the surface of the material to form a dense oxide ceramic layer, thereby improving the surface quality of light metal parts such as titanium and titanium alloys. A kind of surface modification technology.

The wear resistance, corrosion resistance and insulation performance of the surface of light metal products such as titanium, aluminum, magnesium, etc. treated by the micro-arc oxidation process are greatly improved. In addition, the surface treatment process technology has no emissions of three wastes, no pollution to the environment, short process flow, simple operation, good energy conservation and economy. This process can replace the traditional surface treatment methods such as chromium-nickel electroplating and anodic oxidation that have serious pollution.

The micro-arc oxidation ceramic layer on the surface of light metal formed by the micro-arc oxidation process technology is combined with the substrate in the form of metallurgical micro-melting to form a denser protective film on the surface of the part product. This micro-melting metallurgical structure surface protective film greatly enhances the corrosion resistance of the substrate and improves the hardness and wear resistance of the product surface. After the micro-arc oxidation treatment, the formed micro-oxidized ceramic layer is not only firmly combined with the substrate in metallurgical micro-melt type, but also has a large number of blind hole micro-domain layers on the surface, and the distribution is uniform, and the specific surface area is large, which is conducive to anti-friction conditions The formation of a continuous oil film of the parts improves the lubrication conditions of the parts, reduces the friction coefficient and prolongs the service life. On the other hand, for products that require a special anti-corrosion protective coating treatment on the surface, this process can be used as a preliminary surface treatment, and the formed micro-arc oxidation surface is conducive to subsequent surface treatments such as sealing or powder spraying, and improves the bonding strength of the protective coating And firmness, thereby improving the quality of surface treatment.

Metal surface micro-arc oxidation treatment technology can be widely used in aerospace, aviation, weapons, machinery, automobiles, transportation, petrochemical, textile, printing, hood, electronics, light industry, medical and other industries. Titanium, aluminum, magnesium and their alloys Anti-corrosion and wear-resistant treatment on the surface of parts products. This process technology has been industrialized, and can mass-produce and process various shapes of titanium, aluminum, magnesium and their alloy products to meet the high requirements of users for product surface quality.

titanium bar     High Quality Titanium Wire     titanium welded pipe     titanium rolling sheet

Finishing of different plastic processing techniques for titanium

After the titanium is plastically processed, a series of post-processing operations are carried out to meet the user's final requirements for the surface quality, size, shape and certain properties of the titanium material, collectively referred to as finishing. In other words, the overall process of post-processing is finishing.

It can be seen from the process flow of titanium processing that different plastic processing processes require different finishing processes for titanium materials; different types of titanium materials have different finishing processes after processing. In practice, the finishing of the process can only be designed according to actual needs.

However, in general, the finishing house includes processes such as heat treatment, surface purification, cutting, straightening, surface treatment, inspection, marking, and packaging. For wire and strip, it should also include coiling and uncoiling shear. In order to expand the product variety, the surface treatment of the product can also be included in the finishing range. The above process is briefly introduced below:

(1) Heat treatment. In order to improve the microstructure, residual stress state and mechanical properties of titanium materials, heating, cooling and heat preservation procedures. There are a variety of heat treatment methods, which are carried out according to the needs of general technical users.

(2) Surface purification. Titanium materials after plastic processing are often accompanied by oil, and some are coated with oxide scale, which must be degreasing and deoxidizing. These oxide scales are firmly attached to the outer surface of the drink materials, and it is often necessary to take different methods to remove them according to different thicknesses of the oxide scales. Sometimes it is often necessary to use alkaline washing and acid washing to achieve the purpose of surface purification.

(3) Cut off. After the titanium is plastic processed, it is cut according to the size requirements of the special product. At this time, the two ends or irregular parts of the product can be removed to obtain the required size. When the local defect of titanium material is serious and cannot be repaired, the defect part should also be removed. Plates and strips are usually cut with a shearing machine, and pipes are cut with a sawing machine.

(4) Straightening. The process of correcting shape defects after titanium plastic processing. Shape defects such as the floating of the titanium plate, the bending or twisting of the titanium tube, etc., all need to be corrected to make it into a straight and neat qualified product.

(5) Surface treatment. Because titanium is sensitive to notches, surface defects such as cracks and gettering layers during the production process should be cleaned up in time by grinding and other methods to prevent further deepening during the deformation process. At the same time, in order to make the titanium surface color, oxidation resistance, corrosion resistance, wear-resistance and surface activity improvement, sometimes surface treatment is required.

(6) Coiling. It is a process in which the button belt and titanium wire are rolled into a roll. To facilitate storage and transportation, the products are supplied in rolls. The coiling is carried out on the coiler.

(7) Uncoiling and cutting. The process of unrolling the rolled titanium wire or titanium ribbon, flattening and cutting, and cutting into a single sheet or narrow ribbon or small titanium wire coil required by the user.

(8) Detection. In order to ensure that the product meets the standard or meets the requirements of the user, the size, shape and surface defects of the finished product before sale are checked. The defects detected are then corrected, trimmed, excised or discarded according to the situation. At the same time, sampling and testing the mechanical properties and organizational properties of the drilling materials, and adding non-destructive testing to the sky-slit pipe. At the same time, a qualified report is issued to the customer.

(9) Logo. In order to facilitate the user's use and transportation, and to track the quality of the product, all products should have a mark. The logo can be printed directly on the product, and the logo can be tied to the product at the same time. Because drinking materials are valuable products, each diamond product should have a printed logo. The content of the mark shall include the brand name, specification, batch number, factory standard, etc.

(10) Packaging. In order to facilitate product transportation. And to prevent the towel from damaging the product during transportation, it needs to be bundled and packaged before leaving the factory. Bundling methods vary depending on the product. For example, small cross-section profiles and bars can be bundled or coiled; strips and wires can be coiled; plates and tubes should be packaged and protected by wooden or thin steel plates.

Finishing is very important. It is a guarantee for the quality, geometry and weaving performance of the product to meet the standard requirements after the titanium is made. Only after the processed titanium material has been carefully sorted and packaged by this series of post-processing (ie finishing), its quality can be recognized by users. Therefore, finishing is also a "face-saving project", a plastic repair process.

6al4v titanium bar     titanium spring wire     titanium mig welding wire     titanium hydrogenate powder

Improve the application performance of titanium dioxide by surface treatment

Titanium rods have good physical and chemical properties, low density, lightweight, non-magnetic, high strength, good corrosion resistance, and good mechanical properties and welding properties. Baoji titanium rods are widely used in chemical equipment, seawater For desalination, ship parts, electroplating industry, etc., titanium's corrosion resistance is 10 times that of general stainless steel, and titanium metal is a metal with relatively low human body rejection, so the processed parts of medical titanium rods are widely used in human implants and medical devices use.

skills requirement:

1. The chemical composition of titanium and titanium alloy bars should meet the requirements of GB/T 3620.1. When the buyer is re-inspected, the allowable deviation of the chemical composition should meet the requirements of GB/T 3620.2.

2. The diameter or side length of the hot processed bar and its allowable deviation should meet the requirements of Table 1.

3. After hot processing, after turning (polishing) the bar and cold rolling, the allowable deviation of the diameter of the cold drawn bar shall meet the requirements of Table 2.

4. The out-of-roundness of the turned (polished) bar after hot working should not be more than half of its dimensional tolerance.

5. The indefinite length of the bar in the processed state is 300-6000mm, and the indefinite length of the bar in the annealed state is 300-2000mm, and the fixed or double-length should be within the range of indefinite length

grade 5 titanium rod     Gr2 Polished Titanium Wire     titanium seamless tubing     6al4v titanium plate