What industry uses raw materials such as titanium plates and titanium rods?

Passive titanium and titanium-based alloys are new structural materials, mainly used in the aerospace industry and marine industry.

The main uses of titanium plates: electronics, chemicals, watches, glasses, jewelry, sporting goods, mechanical equipment, electroplating equipment, environmental protection equipment, golf and precision processing industries.

The main uses of titanium wire: military industry, medical, sporting goods, glasses, earrings, headwear, electroplating hangers, welding wire and other industries.

The main uses of titanium tubes: environmental protection equipment, cooling tubes, titanium heating tubes, electroplating equipment, rings and various precision electrical appliances.

The main purpose of titanium rods: mainly used in mechanical equipment, electroplating equipment, medical, various precision parts and other industries.
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Industrial pure titanium is graded according to the content of impurity elements

Titanium has many obvious superior characteristics: low density (4.5kg/m3), high melting point (1660°C), strong corrosion-resistance, high specific strength, good plasticity, and high mechanical properties can also be produced by alloying and heat treatment. The various alloys are ideal structural materials for aerospace engineering. Α-phase titanium-containing a certain amount of oxygen, nitrogen, carbon, silicon, iron and other element impurities. It has excellent stamping process performance, good welding performance, insensitive to heat treatment and structure type, and has a certain strength under satisfactory plastic conditions.

Industrial pure titanium is graded according to the content of impurity elements. Its strength mainly depends on the content of interstitial elements oxygen and nitrogen. It has high corrosion resistance in seawater but is poor in inorganic acids. It is generally used to manufacture various sheet parts or forgings that work at a temperature of -253 to 350°C and does not bear much force. It can also manufacture rivet wires and pipes. Application examples: In addition to the use of industrial pure titanium to make parts, titanium alloys are widely used in the industry. It has been widely used in aviation, aerospace, chemical, shipbuilding and other industrial sectors, manufacturing gas turbine components, making biomaterials such as prostheses.
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Titanium alloy is more suitable for spacecraft manufacturing than steel

Aerospace vehicles work under extreme conditions such as ultra-high temperature, ultra-low temperature, high vacuum, high stress, and strong corrosion. In addition to relying on excellent structural design, they also rely on the excellent characteristics and functions of the materials. Titanium alloy combines the characteristics required by aerospace products and is known as "cosmic metal" and "space metal". Titanium alloy has become an ideal manufacturing material for aircraft and engines due to its high strength, good mechanical properties and good corrosion resistance, but its poor machinability has restricted its application for a long time. With the development of processing technology, in recent years, titanium alloys have been widely used in the manufacture of parts such as the compressor section of aircraft engines, engine hoods, exhaust devices and the manufacture of structural frame parts such as aircraft girder frames.

Compared with general alloy steel, titanium alloy has the following advantages: higher specific strength: the density of titanium alloy is only 4.5g/cm3, which is much smaller than iron, and its strength is similar to that of ordinary carbon steel. Good mechanical properties: Titanium alloy has a melting point of 1660°C, which is higher than iron, and has higher thermal strength. It can work below 550°C and usually shows better toughness at low temperatures. Good corrosion resistance: A dense oxide film is easy to form on the surface of titanium alloy below 550℃, so it is not easy to be further oxidized. It has high corrosion resistance to the atmosphere, seawater, steam, and some acids, alkalis, and salt media.

High-temperature titanium alloys: The research and development of supersonic cruise bombs, hypersonic cruise bombs, reusable vehicles, and suborbital reusable transatmospheric vehicles require titanium alloys to be used at high temperatures of 600°C and above, which requires Titanium alloys must have excellent high-temperature resistance. The first high-temperature titanium alloy in the world is Ti6Al4V developed by the United States, which can be used at 300～350℃. Ti6Al4V alloy has both α + β two-phase characteristics and is widely used in the aerospace field. In order to maximize the effect of Al solid solution heat strengthening, Sn, Zr, Mo and Si are also added to the titanium alloy, and alloys such as IMI679 and Ti6242 with a use temperature of 450 ℃ have been developed successively, and IMI685, Ti6242S and other alloys using IMI834, Ti1100, BT36 and other alloys at a temperature of 550-600°C.

Low-temperature titanium alloys: With the rapid development of space technology, the application of titanium alloys in low-temperature and extremely low-temperature environments has increased, and the development of low-temperature titanium alloys is extremely important. Research has found that reducing the content of interstitial elements such as H, O, N and Al can improve the low-temperature performance of titanium alloys, so that they can be used for a long time under a 20K temperature environment.
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The development status of titanium in the bicycle industry in recent years

Bicycle components refer to the crankshaft positioner, pedals, handlebars, etc. connected to the frame. The titanium component industry is developing faster than the Ti-3AL-2.5V frame industry, and most of the components are produced with Ti-6Al-4V, Most of the parts are machined from bars or plates. The purchasing power of Ti-6A1-4V for parts is only 1/3 of that of Ti-3 gusset 2.5V frame, about 10t in 1997. Casting parts can become more and more common, but the development in this area may be slower than the development of machined parts. Titanium suppliers start to provide titanium parts manufacturers with cheap materials. Most of these low-cost bicycle-grade materials are actually Obsolete aviation materials.

The material requirements of the bicycle frame are very simple, but the driving characteristics are particularly critical, which complicates the selection of materials in some aspects. Most transportation vehicles, structural elements and internal facilities and operating elements are separated. Until recently, all bicycles The frame requires structural integrity and suspension function. There is no titanium alloy specially designed for bicycles. Only some materials have been improved for bicycles. Most people consider cost reduction issues and accept titanium components. The main problem is rigidity rather than cost. Ti-3Al-2.5V is the most commonly used titanium alloy for bicycles. Although it is developed for aircraft hydraulic systems, it is due to formability and corrosion resistance. The high fatigue strength to weight ratio and good elongation makes it meet the bicycle market performance standards. Compared with other titanium alloys, the biggest advantage of Ti-3Al-2.5V is the yield strength and easy tube forming. The disadvantage is its price and mold. The ratio of volume to density is poor. It is not easy to extrude Ti-3Al-2.5V as the dominant frame material. Ti-6AI-4V also has a certain attraction, and its modulus and strength are better than Ti- 3Al-2.5V is higher, but it is difficult to process into a tube with a small diameter like a bicycle frame. Ti-15V-3Al-6Cr-4Mo-4Zr is also easy to shape, but its higher density and lower modulus offset its strength The improved advantages.
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Development characteristics of titanium alloy materials and titanium product processing technology

Due to the high manufacturing cost of titanium alloys, in order to reduce costs, the competitiveness of titanium alloys in the entire metal material market has been improved at a lower price. It is generally believed that titanium has incomparable superior performance compared to other materials, but the price of titanium often discourages consumers (especially car manufacturers). The emergence of high-quality, low-cost titanium alloys will certainly help the popularization and application of titanium and titanium alloys.

Judging from the application status at home and abroad and the development of titanium processing technology, the plastic processing technology of titanium and titanium alloys will develop in the following directions in the future:

1) High performance, that is, the development of alloys with higher service temperature, higher specific strength, higher specific modulus, better corrosion resistance and wear resistance.

2) Multi-function, namely the development of titanium alloys with various special functions and uses, such as high damping, low expansion, constant resistance, high resistance, resistance to electrolytic passivation and hydrogen storage, shape memory, superconductivity, low modulus biomedical And other titanium alloys, and further expand the application of titanium and titanium alloys.

3) Deepen the research of traditional alloys, improve the practical performance of existing alloys, and expand the application range of traditional alloys through the improvement of equipment and processes.

4) Adopt advanced processing technology and large-scale continuous processing equipment to develop continuous processing technology, direct rolling technology, cold forming technology and near-net forming technology to improve the production efficiency, yield and product performance of titanium alloys.

5) Reduce costs, develop alloys that contain no or almost no precious metal elements, and add cheap elements such as iron, oxygen and nitrogen, and develop titanium alloys that are easy to process and shape, easy to cut, and have cheap alloy elements and master alloys. Develop titanium alloys and use banned materials to increase the recovery rate and utilization rate of banned titanium. This is particularly important for reducing the cost of civilian titanium alloys.

6) Use advanced computer technology to simulate the deformation and processing of the workpiece, predict the evolution of the metal microstructure, and even predict the mechanical properties of the product (yield strength, tensile strength, elongation, hardness, etc.). ), and design or improve molds and tooling; analyze and process test results, reduce test volume, improve work efficiency, and reduce development costs.
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Application of titanium plate in medicine

There have been successful cases in the application of titanium plates in the medical field. Titanium is a metal that is compatible with the human body. Titanium will be more and more widely used in the medical field in the future.

Among surgical implant materials, titanium and titanium alloy materials have become artificial joints, bone trauma products (titanium intramedullary nails, titanium plates, titanium screws, etc.), spinal orthopedic internal fixation systems, dental implants, Dental trays, orthodontic wires, artificial heart valves, interventional cardiovascular stents and other medical implant products are the materials of choice.

Compared with traditional treatment methods such as small titanium plate, titanium wire internal fixation, single jaw ligation, intermaxillary traction, a titanium plate in the treatment of maxillofacial fractures, it has the advantages of simple operation, small damage, precise and reliable In addition to the condyle and zygomatic arch fractures, an extraoral incision is required. For other mandibular fractures, intraoral incisions are often used. There is no scar on the face and can avoid damage to the facial nerve.

The problem of intermaxillary traction during titanium plate internal fixation. We believe that intraoperative intermaxillary traction can provide the correct reduction of the fracture end and a good occlusal relationship, and it can also prevent drilling. When the titanium screw is installed, the fracture segment will be displaced again. The occlusal relationship is disordered. Except for the cases of combined mandibular fractures, which need to be assisted for about 1 week after internal fixation, traction and fixation are generally not required after other fracture fixation. Because of the short traction time, it is very difficult for patients. The temporomandibular joint has little effect on the function, easy to maintain oral hygiene, can eat, is conducive to nutrition and wound healing of patients, and at the same time greatly reduces the pain of patients compared with the past.
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What are the chemical element classifications of titanium tubes

Titanium tube is an allotrope with a melting point of 1720°C. When it is lower than 882°C, it has a close-packed hexagonal lattice structure, called α titanium; above 882°C, it has a body-centred cubic lattice structure, called β titanium. Using the different characteristics of the above two structures of the titanium tube, adding appropriate alloying elements to gradually change the phase transformation temperature and phase content to obtain titanium alloys with different structures. At room temperature, titanium alloys have three matrix structures, and titanium alloys are divided into the following three categories: α alloys, (α+β) alloys and β alloys.

Titanium tube is a single-phase alloy composed of α-phase solid solution. It is α-phase no matter at normal temperature or at higher practical application temperature, with stable structure, higher wear resistance than pure titanium, and strong oxidation resistance. At a temperature of 500°C to 600°C, it still maintains its strength and creep resistance, but cannot be strengthened by heat treatment, and its room temperature strength is not high. It is a single-phase alloy composed of β-phase solid solution. It has a high strength without heat treatment. After quenching and aging, the alloy is further strengthened. The room temperature strength can reach 1372 ~ 1666 MPa, but the thermal stability is poor and it is not suitable for use at high temperatures.
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