Chapter 1023

"Chief, you see what you said, you even used the word" you ". You think highly of our Tengfei group. We want to upgrade, but it's not so easy. At most, it's just a slight improvement on the basis of h-zb800 and nb-2800x."

Zhuang Jianye smiles modestly and says more modestly. The problem is that the head of the headquarters doesn't eat this at all. He squints his eyes and asks Zhuang Jianye, "do you want money?"

"Yes Zhuang Jianye did not hesitate.

"Then be honest!" The head of the headquarters didn't have a good voice.

"In fact, it's nothing, that is, the strength and toughness of h-zb1000 carbon fiber composite is twice as high as that of h-zb800, reaching the material properties of F-22 inlet lip, wing edge, vertical tail leading edge and other key positions prone to shock wave resistance in the United States..." It is self-evident that

can not be seen in the head of the headquarters. Zhuang Jian Ye can only explain it honestly. In fact, the advanced stealth fighter like F 22 and B 2 is actually much better than the advanced stealth fighter, although the manufacturer claims to use much carbon fiber composite material, and the advanced points are not bad. Even the decimal points are more accurate than the reports submitted to the Ministry of defense.

But if anyone follow these words to do stealth aircraft, they have to touch one end of the bag.

The reason is very simple. It's true that Americans use carbon fiber composites on stealth fighters. The problem is that people use more than four kinds of carbon fiber composites instead of one.

Because according to the aircraft in different states, the composition of aerodynamics and the actual force of the body, the comprehensive cost situation, it is necessary to make a choice in terms of materials.

This is similar to the idea of producing different materials such as steel for body frame, aluminum alloy for door and high strength alloy steel for chassis.

As the only next generation fighter in the world, the F-22 also applies this idea. The traditional t500 and T800 carbon fiber composites are used in the manufacture of horizontal tail or vertical tail panel.

The wing, back skin and some structural parts are made of ultra-high strength and high toughness carbon fiber composites equivalent to h-zb800.

however, neither T500 nor T800 nor H ZB800 can reflect the advanced nature of F - 22, because the three kinds of carbon fiber composites lack a key index, that is, super heat resistance.

After all, the most typical performance index of the next generation fighter like the F-22 is supersonic cruise. In the process of transonic, the windward side of the aircraft will produce a very strong shock resistance, which not only has strong force, but also produces great heat energy to burn the key parts of the airframe.

In order to reduce the effect of shock resistance, titanium alloy is generally used as an ideal material to counteract this kind of key force.

The problem is that there is no problem with titanium alloy on the third generation fighter. If it is used rashly on the next generation fighter, there will be a big problem. The reason is very simple. Another key index of the next generation fighter is radar stealth. As a metal material, titanium alloy has super radar reflectivity.

Because of this, as the structural frame of the next generation fighter, titanium alloy has no problem with the internal truss, but it is not suitable to be exposed as skin.

Unless the ground crew is willing to bear the maintenance work from changing state to explosion, it will take 100 hours for each flight hour, and it's almost the same to apply wave absorbing coating all over the body.

Therefore, the ideal material for the fuselage skin and other components of the next generation fighter like F-22 is carbon fiber composite. In addition to low radar reflectivity, it can also achieve subtle reflection of radar waves through multi-layer braiding and other technological means, so as to achieve the so-called "absorbing" effect.

Combined with the stealth design of aerodynamic shape and the support of absorbing coating, the overall radar stealth ability instantly reaches a new height.

However, although the carbon fiber composite is good, it has one disadvantage, that is, the heat resistance is particularly poor. This is not because of the carbon fiber composite itself, but because of the characteristics of the epoxy resin connecting the carbon fiber.

At normal temperature, the epoxy resin used for bonding and curing will not have any problems. Once the temperature reaches a certain value, the epoxy resin will decompose rapidly under the action of high temperature, resulting in rapid failure of carbon fiber components until disintegration.

Because of this, in the past, although carbon fiber composites were used in the third generation combat aircraft, they were only placed in the non heat bearing parts. That's why.

The problem is that the third generation aircraft can not care, and the next generation combat aircraft can not ignore it. Otherwise, how can we achieve radar stealth?

It is obvious that Americans have come to the forefront of the world in this respect. Both B-2 and F-22 have proved with practical actions that Americans have achieved industrial mass production in this respect.

Of course, Tengfei group can't get the relevant core technology from the United States. Let alone Tengfei group, it is the British aerospace company which is wearing the same pair of trousers as the United States. Therefore, the h-zb1000 of Tengfei group naturally uses its own core technology."The chemical industry of Americans is developed, so they can work hard on epoxy resin to make epoxy resin that can resist high temperature and oxidation, and then use automatic wire laying machine to complete industrial production.

We don't have such good conditions as the Americans, so we have to find a new way. Therefore, when we summed up the reasons for the failure of the last recoverable satellite, we found that although the ceramic based heat-resistant materials we are responsible for producing do have poor high-temperature oxidation resistance, they are not useless.

So we studied this idea and found two broad application paths. One is high-precision cutting-edge ceramic tools, which can be used as fast cutting tools for precision machine tools and special machine tools.

The other is the h-zb1000 carbon fiber composite material with ultra-high strength, ultra-high toughness and extremely strong heat resistance. We do not agree with the previous carbon fiber materials. We use part of the ceramic matrix composite technology in the h-zb1000 internal fiber, and integrate part of the ceramic fiber into the new fiber material formed after curing with the carbon fiber.

Then, through our specially developed nb-2800x composite fiber 3D weaving equipment, we weave it into materials that meet the specifications, and then shape it in a high-temperature solidification furnace at high temperature. Only in this way can the materials meet the requirements. Through our experiments, the torsional heat generated when the helicopter blade deflects will not have any impact on our h-zb1000.... "

Zhuang Jianye talked about the new materials in detail, but the head of the headquarters browed more and more when he heard them. Finally, he couldn't help but interrupt: "is that all you summarized about the failure of the recoverable satellite?"

"There is something else It's just that there are some difficulties in funding. Chief, look... "

"I..." The head of the headquarters was so angry that he couldn't laugh or cry. He said a lot about waiting for him here, so he lit Zhuang Jianye's head and said, "can you be more reserved when you see money? Anyway, he is also the person in charge of a large enterprise. Can I have a little face? "

Zhuang Jianye nodded: "OK, but I have turned over my face to the state a few years ago. Otherwise, chief, do you think this is OK? My face and funds will be approved by you this time? "