Chinese Eagle titanium alloy parts, 3D printing technology molding
It is widely believed that the United States led the industrial revolution. In the near future, a few messages from China have shocked the world.
The synthesis of these messages confirms the fact that China has become the only country in the world to possess the manufacturing technology and practical applications of laser forming titanium alloy large main bearing components.
With the titanium alloy 3D printing technology, China is in the field of aviation materials for the first time to the forefront of the world advanced level.
Put the powdered material into the printer, and under the magic of the laser, you can get what you want - from toys, models, artifacts, fakes, car parts, to human organs. This dream scene is the 3D printing technology that is popular all over the world and is considered by the British economist as "will promote the realization of the third industrial revolution".
China's top fighters "blowout" a major contributor
Recently, in the Chinese Beijing International High Tech Expo, China Aviation Industry jointly with the Beihang University show won the 2012 annual "National Technological Invention Award" aircraft titanium alloy large key components of laser forming technology, and through a 5 square meters of its production of titanium alloy reinforced frame.
According to foreign media reports, 3D printing technology is being used in large China being developed in the first aircraft carrier aircraft fighters -15, multi-purpose fighter f -16, the fifth generation heavy fighter f -20 and the fifth generation medium fighter -31, and to fly the civil aircraft C919.
Chinese Eagle titanium component, 3D print
According to CCTV news channel reported, the -15 chief designer Sun Cong revealed during the two sessions, titanium and M100 steel 3D printing technology has been widely used in the main part of the -15, including the entire front landing gear.
Huang Weidong, a professor at the school of materials science at Northwestern Polytechnical University, has produced a 3 meter long titanium alloy component as an important component of the C919 wing. According to him, China has been developing 3D printing technology which can replace the traditional complex manufacturing process for nearly 20 years.
In fact, China now has the use of laser forming more than 12 square meters of complex titanium alloy components of the technology and ability.
The application of 3D printing technology has greatly accelerated the progress of research and development of domestic sophisticated fighters. Relying on the laser titanium alloy molding, low cost and fast speed characteristics, Shenyang aircraft industry group in a year to continuously assemble the "-15", "-16", "-31" and other fighters, and test flight.
The biggest benefit is that the fighter's performance has been greatly improved
Titanium alloy with light weight, high strength and high temperature resistance is the key material of military aircraft. However, the expensive price of titanium alloy and the special material attribute lead to the parts produced by traditional forging technology, and the maximum size is not more than 4.5 square meters.
According to the deputy chief designer of the Shenyang aircraft design and research Wang Xiangming, titanium alloy to 400 thousand to 500 thousand yuan a ton, while the traditional process of the material utilization rate of less than 10%, such as casting titanium alloy U.S. F-22 fighter the main load-bearing components, 95% of raw materials will be cut off as scrap. "Besides, the titanium alloy is very sticky, and the processing time is long and expensive."
The laser titanium alloy forming technology has solved the difficult problem completely. "Processing 1 tons of titanium alloy complex components, the traditional process costs about 25 million yuan, while the laser 3D rapid prototyping technology is only about 1 million 300 thousand yuan."." In addition, there is no need to manufacture a dedicated mold, which was equivalent to material costs of one to two times the processing costs, now only 10% of the original.
In addition to saving time and money, and more importantly, through the 3D printing, complex structure, special titanium alloy components can be integrated into one without forging them out and welded together, which greatly improves the strength of the fuselage.
Special "awesome", according to expert estimates, F-22 titanium alloy forgings, if manufactured using 3D printing technology China, while the strength of considerable weight, can reduce 40%. This will greatly improve the performance of the fighter aircraft performance, get a huge boost.
So in theory, the existing Chinese turbofan engine, if used in the wide application of 3D printing technology to produce -20 fighters and five generation fighter, and not too large thrust weight ratio gap F-22. As a result, our relatively backward engine technology will not be too "drag" behind.