"The two basic material projects that we need to pay the most attention to: superalloys for turbines and a new generation of aluminum-lithium alloys."

Both materials are indispensable things in the aircraft, and it goes without saying that high-temperature alloys are used in engines, the so-called high-temperature turbine alloys, a generation of new engines. This illustrates the significant impact of the new superalloys on turbojet engines.

Since the practical application of turbojet engines, the importance of heat resistance of high-temperature turbines has been increasing, and finally turbine temperature has become a major indicator of engine performance.

The republic has always been a big problem in the high-temperature turbine in later generations, and has become a major obstacle to the progress of the engine industry.

"Well, this high-temperature turbine material must be supported, and it will definitely be of great use in the future, and every increase in turbine temperature is a huge boost for the engine. And this material is necessary for all engines, as long as the engine has a high-temperature turbine, then it needs high-temperature materials, and this must continue to be supported. ”

As the general manager of the base's manager's association, Director Bai is also responsible for the development and manufacturing of engines, and it is not an exaggeration to say that he is a giant of the base.

Now that it is said that it is necessary to continue to support the high-temperature turbine, naturally no one objected, originally this fund was obtained by Yang Hui, and Yang Hui's personnel relationship is actually in the second institute, which is absolutely under the control of Director Bai.

"Everyone voted by a show of hands on whether to invest in high-temperature turbine projects."

Again taking out the banner of democracy, it is indeed invincible, and the manager of ten people will abstain with two votes. The advantage of eight votes goes straight through.

The result was clear: "Well, after a collective vote." Southwest United Aviation Science and Industry Corporation invests in research on high-temperature turbine materials. ”

It was decided to invest in high-temperature turbines, and then it came to the most extensive research on aluminum alloy skin materials for aircraft.

Yang Hui once again assumed the responsibility of Secretary-General. Since it was a question he raised, it was natural that he still needed to explain the specific situation of the project to be prepared for investment research.

"Leaders, let me introduce a new situation that we heard about the first time we participated in the Paris Air Show, at the air show, the world's two largest aluminum alloy manufacturers, the British Alcon and the United States Alcow, the two giants announced their new aluminum products: aluminum-lithium alloy. We must immediately follow in the footsteps of these two companies, and it is urgent to develop our own aluminum-lithium alloy. ”

The so-called aluminum-lithium alloy has actually been seen a lot in later generations. The yellow aircraft skin of later generations is the use of aluminum-lithium alloy, before the emergence of aluminum-lithium alloy, the aircraft are all used aluminum-magnesium alloy - dura aluminum.

The color of Dularu is naturally the most common silvery-white. This is also the reason why in the early propaganda caliber of the Republic, the aircraft has always been called the Silver Eagle.

For example, Super Jianjiao VII originally used Dulalu, but Yang Hui had a big brain, and he was painted with Tuhao Yellow, which also reflected the huge advantages of aluminum-lithium alloy over traditional aluminum-magnesium alloy after the emergence of one aspect.

Of course, it is not too strange to aluminum-magnesium alloy for aviation, at least this thing has appeared for many years, but it has not appeared on a large scale in the Republic for various reasons, and it has long been used in the manufacture of aircraft in Europe and the Soviet Union.

The advantage of aluminum-lithium alloy is that it weighs much less than aluminum-magnesium alloy. In the development of the A5 carrier-based attack aircraft in the United States, aluminum-lithium alloy was used to replace the aluminum-magnesium alloy originally used on the wing and flat tail.

The benefits are also clear: the entire aircraft has been reduced by six percent, which is definitely a remarkable breakthrough, which means hundreds of kilograms of weight reduction.

However, there was also a great breakthrough in aluminum-magnesium alloy at that time. The emergence of a new generation of aluminum-magnesium-copper alloy has temporarily pushed the aluminum-lithium alloy down. However, after the energy crisis of the sixties, aluminum-magnesium alloys began to be used in passenger aircraft. Until the new generation of aluminum-magnesium alloy launched at the Paris Air Show in 83.

Yang Hui is not the only one who has participated in the Paris Air Show in 83. Director Bai also went to participate in the air show, and he still remembers the new generation of aluminum-magnesium alloy exhibited at the air show.

"Yes. I also know this, this is the third generation of aluminum-magnesium alloy. In terms of weight and material strength, there has been a greater breakthrough in the second generation of aluminum-magnesium alloy, and it can be said in person that no matter how much aluminum-magnesium alloy is improved, it will be difficult to shoot, and aluminum-lithium alloy will definitely be the direction of aircraft skin in the future. ”

Director Bai is engaged in engines, which has nothing to do with the skin of the aircraft, and now he stands up to speak for the aluminum-magnesium alloy, strongly supports the aluminum-magnesium alloy, and predicts the bright future of the aluminum-magnesium alloy in the future. Then Chief Engineer Yu, who is engaged in aircraft design, must also stand up and say something.

"Aluminum-magnesium alloy is a good thing, there is no doubt about it, and now that the international community has begun to use it on a large scale, the future of aluminum-magnesium alloy will definitely be replaced by aluminum-lithium alloy. So now we are investing in the research of aluminum-magnesium alloy, which is definitely promising, at least now we have no factory in China that has come up with even the first generation of aluminum-magnesium alloy mass production plates. ”

It is not the same thing that the leaders of the two design institutes have always spoken, and the leaders of other factories still have the right to speak, and some problems still need to be said.

"The two directors said that this new aluminum-magnesium alloy is so good, then we want to ask, how much money will be invested in this thing, how much time will it take to come up with the finished product, in case we throw the money out, it will not be effective for decades, then it will be meaningless."

It's a bit of a quick success, and it's really not clear when the material development will be developed, it's all about smashing with money, and then according to some unclear laws, to carry out continuous experiments.

After constantly throwing money and investing, it will slowly produce results, of course, it is not excluded that there is that kind of thing, just invested money and then lucky, character explosion, and this thing was experimented.

Material development is a kind of probabilistic experiment, no one can say clearly, the only effort is to increase the probability of winning as much as possible.

Now no one can say this question clearly, and they are not professional materials, and the two directors can't come up with a definite answer, so they can only be silent and think about what to say.

Yang Hui is different, young people don't have so many concerns: "Leader, the problem of this material research is not so easy to do, we are not professionals, and now we are only discussing which project is promising." As for how much money is needed for this project and how much time it will take to produce results, this needs to be communicated with the aluminum alloy R&D unit before we can draw conclusions. ”

After Yang Hui spoke, Chief Engineer Yu also nodded in agreement, the development of this kind of material is not what the base should do, and the base has to find a research and development unit, and then cooperate in the project.

"Yang Hui is right, we definitely need to sum up this project with relevant units, so that we can come up with an approximate capital demand, and when will the results be produced."

When it comes to the research and development unit, it is now necessary to make a good summary of who to cooperate with, which is a very critical issue, or to talk about the development of high-temperature materials first.

Director Bai has come into contact with a lot of single crystal research and development units, and naturally he will be discharged as soon as he says it: "There are many single crystal material development units in our country, such as the Institute of Aeronautical Materials in the imperial capital, the Chinese Academy of Sciences, and the National Iron and Steel Research Institute, these are the first generation of single crystal development units, and we need to sum it up and choose a suitable research and development unit." (To be continued......)