1. Major countries in the field of aerospace titanium are concentrated in western countries, especially the United States. 60% of titanium materials are applied in this field.Asian countries, Japan and China all have titanium inputs of around 10%.However, with the rapid development of Asian aerospace in recent years, the consumption of titanium in the aerospace sector will increase.From a global perspective, the aviation industry plays a decisive role in the titanium market. Historically, the major cycles of the titanium industry have been closely related to the ups and downs of the aviation industry.
2. Civil aircraft
(1) reduce structural weight and improve structural efficiency
(2) meet the requirements of high-temperature parts
(3) meet the requirements of matching with the structure of composite materials
(4) meet the requirements of high corrosion resistance and long life
3. Military aircraft
The development and procurement of military weapons are developing towards the direction of portability and flexibility. In order to meet the combat performance requirements of fighter aircraft, in addition to the use of advanced design technology, it is also necessary to use materials with excellent performance and advanced manufacturing technology.It is one of the important measures to select a large number of titanium alloys and improve the application level of advanced titanium alloys.
Since the 1960s, the amount of titanium used in foreign military aircraft has been increasing year by year. Currently, the amount of titanium used in various advanced military fighters and bombers designed by Europe and the United States has been stable at more than 20%, and the proportion of titanium used in new aircraft is greatly increasing.
Reducing fuel consumption and emission of hazardous wastes (CO2, NOX, etc.) has become one of the main driving forces and directions of technological progress in the automobile industry.The research shows that lightweight is an effective measure to save fuel and reduce pollution.For every 10% reduction in vehicle mass, fuel consumption can be saved by 8% to 10% and exhaust emissions can be reduced by 10%.
In terms of driving, the vehicle's acceleration performance is improved after lightweight, and the vehicle's control stability, noise and vibration are also improved.From the consideration of crash safety, after the vehicle is lightweight, the inertia is small and the braking distance is reduced.
The first choice of lightweight automobile is to replace traditional automobile materials (steel) with lightweight materials with high specific strength, such as aluminum, magnesium and titanium.In 2009, the amount of titanium used in automobiles worldwide reached 3,000 tons.The application of titanium in racing cars has a history of many years. Currently, almost all racing cars use titanium. Titanium used in Japanese cars has exceeded 600 tons.
5. Medical industry
Titanium has a wide range of applications in the medical field.Titanium is close to human skeleton, and has good biocompatibility and non-toxic side effects on human tissue.Human body implant is a special functional material closely related to human life and health.Compared with other metal materials, the advantages of using titanium and titanium alloy are as follows:
(2). Low elastic modulus;
(5). Corrosion resistance;
(6). High strength and good toughness.
The amount of titanium in surgical implants is growing at a rate of 5-7% a year.Using titanium and titanium alloy manufacture of femoral head, hip, humerus, skull, knee, elbow, shoulder joint, joint, jaw and heart valves, kidney distinguishes the membrane, blood vessel expander, plywood, prosthesis, fastening screws and other hundreds of transplanted into the body of the metal, has obtained the good effect, gave a high evaluation by the medical profession.
6. Chemical industry
Titanium has excellent corrosion resistance, mechanical properties and technological properties, and is widely used in many sectors of the national economy.Especially in chemical production, titanium is used instead of stainless steel, nickel-based alloy and other rare metals as corrosion resistant materials.It is of great significance to increase output, improve product quality, extend service life of equipment, reduce consumption, reduce energy consumption, reduce cost, prevent pollution, improve working conditions and improve labor productivity.
7. Ocean engineering
With the development of science and technology and the depletion of land resources, the exploitation and utilization of the sea has been put on the agenda.Titanium has excellent corrosion resistance to seawater, and it is widely used in seawater desalination, ships, Marine thermal energy exploitation and seabed resources exploitation.
8. Daily life
Titanium is widely used in daily life and can be found everywhere, such as golf ball heads, bicycle frames, tennis rackets, wheelchairs, glasses frames and so on.
Titanium, with its light weight and high strength, has been applied in sporting goods, from the earliest tennis rackets and badminton rackets to golf heads, clubs and racing cars.
In 2008, sports and recreation accounted for 13 percent of the total consumption in China, among which the amount of titanium used for golf heads and clubs alone exceeded 1,000 tons.Titanium bicycle frames are also popular. Nearly 50 companies now make titanium bicycles. The United States is already the largest manufacturer and consumer of titanium bicycles.
Titanium has also been used in frames since the early 1980s because of its lightweight weight, its resistance to skin irritation, and the fact that its surface has been anodized to give it a rich color.
Titanium is considered a rare metal because it is dispersed in nature and difficult to extract.But it is relatively abundant, ranking 10th among all the elements.Titanium ore is mainly ilmenite and rutile, widely distributed in the crust and lithosphere.Titanium is also present in almost all organisms, rocks, water and soil.
Extracting titanium from the main ore requires either kroll or hunt.The most common compound of titanium is titanium dioxide, which is used to make white pigments.Other compounds include titanium tetrachloride (TiCl4), which ACTS as a catalyst and is used to make smoke screens for air cover, and titanium trichloride (TiCl3), which is used to catalyze the production of polypropylene.
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Titanium alloy characteristics:
High strength, titanium alloy density is generally about 4.51g/cm3, only 60% of steel, the strength of pure titanium is close to the strength of ordinary steel, some high-strength titanium alloy than many alloy structural steel strength.Therefore, the specific strength (strength/density) of titanium alloy is much higher than that of other metal structural materials, which can be made into parts with high unit strength, good rigidity and light weight.Currently aircraft engine components, skeleton, skin, fasteners and landing gear are all using titanium alloy.