Chapter 431 (2/2)
Seeing that many engineers are confused, baozixuan smiled and said, ”since you are already a member of weasel factory, that is, the core engineer of heiyun group, there is no need to hide from you.”
”This material I'm talking about is carbon fiber material. Carbon fiber is a special fiber mainly composed of carbon elements. Its carbon content varies with different types, generally more than 90%. Carbon fiber has the characteristics of general carbon materials, such as high temperature resistance, friction resistance, conductivity, heat conduction and corrosion resistance, but different from general carbon materials, its shape has significant anisotropy, softness, can be processed into various fabrics, and shows high strength along the fiber axis. Carbon fiber has a small specific gravity, so it has a high specific strength. ”
”Carbon fiber is made of man-made chemical fiber with high carbon content and non melting during heat treatment. It is made by heat stable oxidation treatment, carbonization treatment and graphitization.”
”Carbon fiber is a new material with excellent mechanical properties. Its proportion is less than 1 / 4 of that of steel. The tensile strength of carbon fiber resin composites is generally more than 3500MPa, 7 ~ 9 times that of steel, and the tensile elastic modulus is 23000 ~ 43000mpa, which is also higher than that of steel. Therefore, the specific strength of CFRP, that is, the ratio of the strength of the material to its density, can reach more than 2000mPa / (g / cm3), while the specific strength of A3 steel is only about 59mpa / (g / cm3), and its specific modulus is also higher than that of steel. ”
In the eyes of many people, these things are difficult to understand, but the people who can be in this office are from science and engineering. The material data is very clear. After hearing the boss say that, they all think that this material will have great prospects in the future.
As early as 1969, Japan Carbon Corporation successfully developed high-performance polyacrylonitrile based carbon fiber. In 1970, Japan Toray company developed high-performance polyacrylonitrile based carbon fiber by relying on advanced polyacrylonitrile precursor technology and exchanging carbonization technology with United carbide company of the United States.
In 1971, Toray put high-performance polyacrylonitrile based carbon fiber products on the market. Since then, the performance, variety and output of products have been developing continuously, and they are still in the leading position in the world. Since then, Japan's Toho, Asahi Kasei, Mitsubishi Rayon and Sumitomo have successively invested in the production of polyacrylonitrile based carbon fibers.
Baozixuan obtained the patented technology and production authorization of carbon fiber materials from the Japanese through patent exchange. At present, this material has not received much attention, at least in Japan. It can be said that baozixuan picked up a leak.
There's another point baozixuan didn't say. Titanium alloy and carbon fiber are luxury ground effect aircraft. In the future, aluminum alloy version may be produced because of the cost, or steel version ground effect aircraft may be produced because there is not so much capacity demand. In short, in the future, ground effect aircraft will be equipped with multiple versions of high, medium and low, and will be customized according to customer needs. It is believed that many people will choose ground effect aircraft as a means of transportation, provided that the products are safe and mature enough.
Bao Zixuan: ”the material problem has been solved. Next, we have to process all kinds of parts. Our time is limited. I hope you don't waste every minute here.”
Fortunately, the drawings left by the Germans are very detailed, and baozixuan is only slightly changed. Otherwise, it will take quite a long time to test the structural layout and parts alone, and it is impossible to complete the prototype production before the Falklands war.
The data assigned to each engineer is different from the drawings. We all know that this is the boss's precaution against them. At the same time, it is also a detailed division of labor for them to make their work more efficient. This is normal in the production of large equipment, but if anyone can easily see the detailed drawings. It is very difficult to keep the product secret. Competitors can easily copy it by digging someone in the past.
Looking at the detailed drawings and technical parameters, we feel that this money is not easy to make. After all, this is not development. It is more about processing parts and testing the responsible area.
Although there are detailed drawings, engineers still have to test each produced part. After all, there is still a big difference between the things on the drawing and the real object. The most important production of aviation equipment should not be careless. Any problem in any link may lead to the crash of the whole aircraft.
Never let the company suffer losses because of your negligence, let alone human life. If this happens, their days in dark clouds will come to an end. Moreover, the most important reputation has been destroyed. It is estimated that it is difficult to find a job in the whole industry. No aviation or shipbuilding company will use an engineer without sense of responsibility.
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