Take Off My Aviation Era

It's not just Professor Zhao who feels this way, Tong Xia and Wu Ping also do the same.

　　As long as you are engaged in helicopters, you don’t care about the performance of the bearings. As long as you care about the performance of the bearings, you will not fail to know the excellence of silicon nitride bearings.

　　 It is important to know that in the domestic helicopter field, apart from chronic heart disease, the biggest difficulty is high-end bearings.

　　 This is also why we need to introduce related technologies from abroad. We want to achieve the goal in one step and raise our own level. From the effect point of view, some technologies have achieved results, but those high-end core technologies still cannot be broken.

There is no other reason, just because the high-end core technology is not to get some samples and do a physical and chemical analysis to make it according to the gourd drawing. It needs the accumulation of multiple basic disciplines and slowly explores to gradually form its own. thing.

　　 In other words, these high-end technologies have no shortcuts at all.

For example, the turboshaft engine on a helicopter. The turboshaft 8 used for the introduction of the "Dolphin" helicopter can be gradually localized in accordance with the French technical indicators, but it is also localized. If you want a more powerful turboshaft engine, the turboshaft 8's production plant can borrow the convenience of the scroll 8 is actually not much, it is still necessary to start again.

　　Because the test of the aero engine is a test of knowledge and accumulation, there is no room for speculation, one can only complete the first step of the Long March by going through all the steps step by step.

　　 The same is true for the **** in high-end bearings. Don’t look at that thing inconspicuously. The polished stone does not lose the appearance of those balls, but the inside involves extremely high-end material science and manufacturing technology.

　　 Take silicon nitride bearing as an example. Everyone knows that this thing is good. However, except for the large-scale application of it to the helicopter field in the United States, Europe and the Soviet Union are also considered advanced aviation technology, but there is no large-scale application. Why? It's not because this thing is difficult to make and cannot be applied on a large scale.

　　It is such a high-end thing. Ascendas Group actually called it the product of experimental failure. It was just a small thing for pocket money. Oh my God, what kind of freak this Ascendas Group is like!

　　 Fortunately, these words Tong Xia and Wu Ping are just thinking about it in their hearts. If they are heard by Zhuang Jianye and Liu Chun, they will definitely point to the sky and swear that they are really not deceiving.

　　 Because silicon nitride is really the thing that failed in the experiment of Ascendas Aviation Technology R&D Center.

　　 As for the experiment, it is high-end. A certain long-range missile includes the heat insulation material on the outside of the missile head.

　　 You must know that Ascendas Aviation Technology R&D Center has only done one thing for so many years, that is, carbon fiber reinforced composite materials derived from carbon fiber materials are a major branch of it.

　　 is divided into two categories, one is the carbon fiber reinforced metal matrix composite material that has been widely used in the aerospace field, and the other is the carbon fiber reinforced ceramic matrix composite material.

　　 The former can be used as the main material for aero engines or long-range missile bodies, while the latter is the essential technology for the upgrading of key components such as the combustion chamber of aeroengines and turbine blades and the loading of long-range missiles into the warhead.

As we all know, the only way for aeroengines to improve performance is to increase the temperature in front of the turbine and increase thermal efficiency. However, ordinary metal materials simply cannot be maintained at a high temperature of more than 1,000 degrees for a long time. Even if various methods are used to increase the cooling efficiency, it is always There is a limit.

　　 So the engineers thought, can a layer of heat-resistant material be coated on the heated parts of the aero engine to increase the working temperature of the combustion chamber, turbine and turbine blades?

In this way, high-end ceramic materials have entered the field of vision of aero-engine engineers, because the stiffness and strength of ceramic materials are good, and more importantly, the heat resistance of ceramic materials is very good, generally at 1800 to 2000 degrees Celsius, plus the previous increase The technical means of turbine front temperature, combined with ceramic coating, will greatly improve the performance of aero engines.

　　 The loaded warhead of a long-range missile is the same. Due to friction with the atmosphere in the atmosphere when falling at a high speed, a large amount of heat will be generated.

　　In the past, alloy steel was used with thermal barrier coating to resist the high temperature of reentry into the atmosphere.

　　 But this will virtually increase the weight of the warhead, reduce the weapon load, and reduce the attack efficiency. Therefore, major countries in the world have carried out research on lightweight heat-resistant materials in order to apply them to the warhead to increase the weapon load.

　　As an important material provider in the aerospace sector, Ascendas Aerospace Technology R&D Center, like other materials research institutions in the aerospace sector, undertakes research in this field.

And quickly based on its own advantages, came up with a carbon fiber reinforced ceramic matrix composite material program, and in the past more than a year developed four types of carbon fiber reinforced ceramic matrix of zirconia, zirconium boride, silicon carbide, silicon nitride Composite materials.

　　 After the technical verification of the aerospace department, zirconium boride and silicon carbide based carbon fiber reinforced ceramic matrix composite materials have become emerging materials for long-range missile loading warheads, and the other zirconia and silicon nitride have been shot back.

　　 If this is another R&D unit, the failed product returned is estimated to be thrown into the pile of old papers and become the so-called "technical reserve."

　　 However, the Ascendas Aviation Technology R&D Center is not an ordinary technology R&D unit after all. The benefits brought by the transformation of technological achievements for many years have long been ingrained. What happened to the failed products returned by the aerospace department? Can it not be used as waste?

　　 Aerospace thermal barrier materials can’t be used, so can’t our own aero engine be used? As a result, it was another half year of bulk research and found that zirconia can be used as a coating material for engine combustion chambers and turbine blades to improve the thermal efficiency of aero-engine turbine fronts. This has been strongly supported by the group, and funding bonuses have been poured in like rain drops.

In contrast, silicon nitride is not so lucky. Due to the nature of the problem, the silicon nitride coating is easy to fall off during operation and cannot be used as the core material of aero-engines. Naturally, the attention will be lowered. To the full support of the group.

But if it is wasted like this, the Ascendas Aviation Technology R&D Center is not reconciled. After all, it is the result of such a long time. If it does not make a profit, it would be too bad, so based on the nature of silicon nitride, Ascendas Aviation Technology R&D Center changed it to The main materials of machine tool cutting tools and bearings are sold to various branches in accordance with the group's internal pricing model.

　　 Liu Chun came over this time to listen to people from other branch factories saying that the batch of machining tools and bearings made by Ascendas Aviation Technology R&D Center is not bad~www.readwn.com~ Come and see if their aviation power plant can use it.

　　 However, I didn’t expect the machining tool to have good performance, so I didn’t get it. I just made two bearings and prepared to take it back and test it to see where it could be used.

　　 In any case, I did not expect that the low-end goods made by the Ascendas Aviation Technology R&D Center can make the old Beihang professors react so much. Is it possible that the Ascendas Aviation Technology R&D Center has done something amazing?

"Brother Zhao, don't get excited. If this thing doesn't work, you have to make progress and have been tested. If it doesn't work, aren't you happy for nothing?" Seeing Professor Zhao's doubts about life, Liu Chun was also taken aback and spoke quickly. Consolation: "What's more, the bearing is welded with two low-carbon steels, not as solid as the cast ones."

"Welding?" Professor Zhao finally recovered after hearing the words, and brought the steel ring to his eyes, but his eyes were almost sinking and the weld was not found, so he asked: "What welding process do you use? ."

　　 "Laser welding." Liu Chun said nonchalantly.

　　 "What?" Professor Zhao's tone has changed...