Chapter 1209

As Zhuang Jianye said, he shoved the huge guide vane into the hands of the person in charge of the aeroengine manufacturing plant in front of him. The person in charge of the aeroengine manufacturing plant was really surprised, because the guide vane is not small, and it's half the size of a small arm. In addition, this thing is directly facing the existence of the so-called strongest high temperature in front of the turbine between the combustion chamber and the turbine It is made of nickel base alloy with complex cooling annular channel, and its weight is not as light as ordinary aviation parts.

So when Zhuang Jianye suddenly jammed in, he really surprised the person in charge of Hangfa manufacturing factory. If one of them didn't catch it, who would be responsible for falling to the ground?

If it's just him and Zhuang Jianye, it doesn't matter. If they can't catch it, they can't catch it. Anyway, it's not his. The problem is that at this moment, the old chief engineer, the deputy director general and the leaders of many other brother factories are all here. No matter how hard this person is, he has to maintain a certain image, so he is really surprised.

But as a result, the person in charge of Hangfa manufacturing factory was not angry because of Zhuang Jianye's reckless behavior. Instead, he held the huge guide blade with one hand, his eyes were incredible, and his lips trembled twice: "how light?"

Yes, in the past, the guide vane made of pure metal such as nickel base alloy was not much heavier than steel of the same volume, but it was not much lighter.

Even if you admit that you can pick it up easily, you need to use some strength to support it.

But at the moment, although the shape and volume of the guide vane on hand are no different from those in the past, the overall weight of the guide vane is at least one third lighter than that of the traditional nickel base alloy guide vane.

You should know that the factory where the person in charge of the aero-engine manufacturing plant holds the guide vane is the most core thermal components of the aero-engine, such as the guide vane and turbine blade, because he is not only aware of the weight of such components, but also extremely sensitive.

As soon as you know, the products of Tengfei group are much lighter than those of their factory.

What does it mean to be so light in the same size and shape?

One is to make a decisive breakthrough in materials, and the other is to realize disruptive innovation in processing technology. Neither of the two is enough.

However, before the person in charge of the aviation development plant recovered from the light guide blade in his hand, another person in charge of the aviation development plant grabbed the guide blade and looked at it for a long time. Not to mention that, he even called his assistant over, took out his portable magnifying glass and carefully looked at the surface for a long time Then he looked up at Zhuang Jianye and asked in disbelief: "you don't have cooling holes on this blade? Direct use of the material itself hard resistance? Even if ceramic materials can have strong high temperature resistance, in the atmospheric environment, the oxidation resistance of ceramic materials is very poor, and its ductility is even worse. The combination of the two leads to the strength is not as good as different low carbon steel. At the same time, the heat flow just ejected from the combustion chamber is fierce and unstable, and the impact is very strong. How do you do it? Not only that... "

I don't know whether the person in charge of the aviation development plant was really surprised or curious. He took the guide vane and asked Zhuang Jianye a series of questions, which confused the other persons in charge of the aviation development plant around him. But none of them came out to stop him, including the deputy director and the person in charge of the aviation development plant who followed Zhuang Jianye.

The reason is very simple, because they also found that there are no complicated film cooling holes on the guide vane.

When we checked the wd-66 turbofan engine with large bypass ratio, they didn't pay attention to this detail. It's not that they didn't look at it carefully, but that this kind of film cooling hole itself is very small. During the high-temperature impact and burning process of the aero-engine, there will be different degrees of oxygenation reaction, which leads to the black surface of the blade. It's very slow to identify the film hole, so it's difficult to identify the location of the film cooling hole It's normal not to notice.

But now, Zhuang Jianye's blade is brand new, without any trace of burning and oxidation. Naturally, they will be discovered by senior people in the field of aviation development at a glance.

But just because of this, except for Zhuang Jianye and the old chief engineer, none of them were shocked that the guide vane facing the temperature in front of the turbine was not equipped with a film cooling hole, and directly used the material itself to eat the high temperature above 1300 ℃.

Such a simple and crude way of doing things, let alone the deputy director and others, is inconceivable. The core engineers of Ge, Pratt & Whitney and Luo Luo also feel numb.

What is the degree of heat resistance of the material itself to be so hard to eat the absolute high temperature before the turbine?

It is necessary to know that the internal structure of nickel base alloy is no longer stable at 1100 ℃. If it is not, it is impossible for Aeroengine engineers to develop a cooling structure as complex as the film cooling hole, but even so, the temperature will be raised to 1300 ℃ at most, no matter how high it is.

Therefore, in addition to further tapping the potential of nickel base alloy single crystal structure materials and making this single crystal structure as extreme as possible, the rest is to try to develop heat-resistant coating materials to coat nickel base alloy blades with skin.However, whether we dig deep into the single crystal structure of the material or apply a layer of skin, the focus is on the nickel base alloy itself.

In this respect, the United States, Europe and Russia are among the leading aviation powers in the world, but China lags behind a lot. There is no way that those aviation powers have accumulated more than half a century in this respect, accumulated more experience than explosion, and are still moving forward.

Of course, China also wants to catch up in this aspect. However, the domestic aviation industry started late, and the real thing to straighten out is to wait until the first flight of the 10th project, which is more than 40 years behind the aviation power as a whole.

Nickel based alloy is an extremely experienced thing, especially the single crystal structure, the ratio of various metal elements, the smelting temperature, the heat treatment process and so on, which can not be solved overnight. It is the best solution that needs tens of years and tens of millions of tests.

If not, how can those aviation powers dare to publish the latest metallographic data of nickel based alloys as research results?

It's not clear how to do this. Even if other countries know the metallographic data, they can't make similar products, because the key of such things is not the data, but the whole production process.

Of course, other domestic aviation manufacturers know this cruel reality, but they have no way at all. If they want to catch up, it will take 20 or 30 years at the fastest. In other words, they can't see any hope.

If there is no hope, there will be no achievements. If there is no achievements, there will be no political achievements. When all the cadres are in this position, who does not want to leave a heavy mark in the future history of the factory?

Can oneself have that ability, how to do?

As a result, many factories have paid more attention to Russia or Ukraine, using their superior manufacturing technology of aeroengine thermal components to do OEM work for domestic aeroengine manufacturers, and then take them to China to affix the factory logo as "domestic" installation.

Of course, maozi are willing to make money. But the problem is that the quality control of maozi is too poor, and the business reputation is also bad. Several domestic air hair factories are eager to be immortal, but they have to suffer. Russia and Ukraine only look at money, while the United States and Europe are desperate for money. So even if maozi are disgusted and fucked up, domestic air hair factories will also lose their teeth Swallow.

Now, it seems that Tengfei group has found another broader solution besides nickel base alloy, and the heads of several aviation development plants on the scene begin to feel alive. Now that they are fed up with the old hairy bird spirit, can they come to an import substitution and take over the products of Tengfei group?