There are eight people sitting around the large desk, which is the only team that has the ability to do the test of titanium alloy machined parts, and six of the eight people are young people, which is indeed very young.

"I'm sure everyone is curious about the reason why I called you, it's simple: now we are going to carry out a project with a high level of secrecy, and after observation, it is believed that you have the ability to carry out the project without relying on Soviet experts, so I will bring you here."

It turned out that I wanted to let my people carry out a confidential project, which is really faintly looking forward to it! It was the first time that young people who had only graduated from university for two or three years had the opportunity to come into contact with such a program.

Busy nodding to express determination: "There is no problem, I will do my best to contribute to the project"

It is more meaningful to have a project to practice than to follow Soviet experts to learn basic technology, as long as a project is done, the technology that should be learned and possessed is available, which everyone still knows.

After extensively listening to the opinions of the eight members of the project team, the first titanium alloy processing and performance scientific research team started the project in this way, and no longer talked nonsense.

"Since it is a scientific research team that does titanium alloy processing technology, our scientific research project this time must be related to titanium alloy, and the specific situation will be sent to you later, now I will briefly introduce it."

Turn around and write the name of the project on the blackboard: "Operation after the Tolerance Fit Between Titanium Compressor and Titanium Receiver".

It's not too difficult to understand the actual description of a scientific research project, but it does take a bit of pen and ink to describe it accurately, and it often requires a long title.

Of course, this is not without benefits. At least you can see what the project is about.

For example, at this time, Yang Hui had just finished writing the name of the project. Everyone has already understood some of the situation, and more or less guessed some of the situation. After guessing this project in my heart. The doubts and incomprehensions of the project are deeper.

The tolerance fit between the impeller and the casing is strictly technical, usually based on experience, plus the special conditions of the engine before manufacturing, this thing is okay who will change it, even if it is to change, there is no point.

Since it's research, don't worry too much about it, and just put forward two possibilities.

The first is the expansion of the tolerance fit, which causes the compression efficiency to plummet, which no one usually does; The other is a narrowed tolerance, which causes huge friction between the impeller and the casing. The end result is a prolonged friction that causes the engine blades to break, or the receiver to wear through.

There are many such things: for example, when Yang Hui first arrived at the Southwest Science and Industry at that time, he encountered a major danger in the air of the Jian-7 aircraft, which almost blew up half of the rear fuselage.

Post-mortem analysis: This is a typical accident caused by too small a tolerance gap between the impeller and the casing. Further investigation of the reason for the narrowing of the tolerance fit is actually caused by human negligence, as long as it is made according to the technical indicators, this problem will not occur at all.

Now after the introduction of a number of foreign advanced processing equipment, the blades can be completely interchangeable, similar to the turbojet 7 engine accident will definitely not be possible again.

Since the tolerance between the impeller and the casing will no longer be reduced. The results caused by the expansion of tolerances have already borne fruit, so the project that Yang Hui is proposing now seems to have no need to study it at all.

Xiang Qiao was the first to think of these problems, and she pointed out these two points without hesitation, and criticized them mercilessly.

“…… So I think. There is no need to study this project, whether it is made of titanium alloy, steel blades, and casings. They are all the same result. I think it would be better to use the funds to study other aspects, such as the reprocessing of hardened skins formed by titanium alloys during machining. ”

Sure enough, she is a legendary strong woman. Speak sharply and straightforwardly, and at the same time have a high level of self-confidence. As soon as he came up, he was ready to challenge one of the five major problems in titanium alloy processing, which made Yang Hui have to sigh that gold can shine anywhere.

Xiang Qiao is very correct, the international academic community has long studied the tolerance between the compressor and the casing, but the authority is not suitable for all places.

"That makes sense, but what I'm not doing now is to study the tolerances specified in the design, which has long been decided and I don't object to it at all. What I want to study is that in long-term use, the diameter of the impeller increases due to deformation, which leads to an interference fit with the casing, and what problems will arise at this time? ”

After the engine is used for a long time, the tolerance fit will change, and even change from a gap fit to an interference fit, resulting in friction

"There is also a lot of research on this problem, the user will have regular inspections, and there will be no problems immediately after the friction between the blades and the casing, and after the problems are found in the regular inspection, they can be replaced directly."

A middle-aged technician saw Xiang Qiao and a little girl talking eloquently just now, and he also stood up at this time, he wanted to support the field for the old man, what he said was reasonable.

Normally, this is also true, as long as it is not the friction between titanium alloy and titanium alloy parts, everything is not a problem, but ......

Nodding his head to affirm that this is true, this is usually the case, and Yang Hui is ready to talk about the specific situation in the current research project.

After the silence, Xiang Qiao found something, and was excited: "If it was put in the past, this was not bad at all, but now with the extensive use of titanium alloy in aero engines, this point is no longer true!" ”

Shaking his head firmly, Xiang Qiao figured out why Yang Hui proposed to study this project, but now the international community is not aware of this problem, once the problem erupts, the consequences are absolutely unimaginable.

Yang Hui originally planned for him to talk about the problem, but now the situation is beyond his expectations, Xiang Qiao seems to see the key node under his own reminder.

In this way, Yang Hui has no need to compete for the limelight: "Okay, let Comrade Xiang Qiao talk about her views, she has different views, maybe not the same as the mainstream views." ”

sat down silently and handed over the topic to Xiang Qiao, the strong woman is going to shine after all.

There was no excuse, and he took over the topic of Yang Hui and began to express his conjectures.

"Even if there is high-speed friction between the traditional steel blades and the casing, there will be no inevitable disaster immediately, but now we have to put the conditions of friction between the casing and the blade in the titanium alloy is different, and the friction between titanium and titanium will inevitably misfire, which is caused by the inherent shortcomings of titanium alloy!"

This can be described as a breakthrough in one sentence, if you don't think of this, forget it, but as soon as these words are said, everyone breaks out in a cold sweat.

The problem of high-speed friction between titanium and titanium is recognized by the academic community, and this conjecture is 100% correct, and the results can be obtained with a little experiment.

At this time, everyone understood that Yang Hui proposed this scientific research project that seemed to have no research significance, why was it meaningless?

At present, the slightly more advanced engines in the world all use a large number of titanium alloys, and it is too common for the casing and blades to use titanium alloy at the same time.

Xiang Qiao was right, Yang Hui affirmed this again: "That's right, titanium alloy casing and blades can't be used at the same time, but now many engines in the world have made this big mistake, and the typical one is the GE9 core engine of General Motors." ”

A technical strongman, coupled with a hidden talent in management, Xiang Qiao heard Yang Hui say that the famous GE9 core machine of General Motors has such a big hidden danger, and immediately read out the place where it can be operated.

"If our research is published, it will be absolutely disruptive, but we should never publish it now. When GM's engine problems erupt, we can sell it for a good price, or exchange it for some kind of technology that we desperately need. ”

While speaking, the aura of the strong woman loomed, which made people's eyes shine. (To be continued.) )