Chapter 712: We don't want it!

As one of the leading aero-engine experts in China, Lin Yunwen has been worried about another problem after this engine has solved the key material problem, which is the bearing problem.
For the time being, domestic bearings are used, and imported bearings are still being purchased, and progress has been relatively slow. Lin Yun's expectation is that these domestic bearings should be able to withstand a series of verification tests, including 300 hours of long-term test runs.
I didn't think about it, Lin Yunwen was a little too optimistic. One of the main bearings of this aero engine that had been tested for 300 hours had a major problem.
Under the magnifying glass, a very small "pit" appeared on the surface of one of the bearing balls. It was very, very small, and it could only be seen clearly under the illumination of light with the help of a magnifying glass.
This is a big deal!
Aviation bearings are absolutely different from general bearings. If they are bearings for general machinery and equipment, there is no problem at all and can continue to be used, but aviation bearings cannot!
For general structural components, even slight cracks can ensure safe use. This is called damage tolerance in professional terms. However, there is no damage tolerance for key transmission components such as aero engine main bearings. No damage of any kind is allowed.
Seeing Wang Xudong’s concern, Lin Yunwen said solemnly:
Mr. Wang, we have encountered a big problem. The shortcomings in the barrel principle have appeared. These domestic bearings basically represent the highest level of domestic bearing manufacturing, but these bearings The service life is only more than 300 hours."
The working environment of bearings in aero-engines can be described as "purgatory". They not only have to run at a speed of tens of thousands of revolutions per minute for a long time, but also endure various forms of stress extrusion, friction and ultra-high temperature.
Operating under high-speed, high-temperature, and complex stress conditions, the quality and performance of the main bearing directly affect the performance, life and reliability of the engine. One of the key indicators of an aero engine is high reliability.
To ensure reliability, one of the prerequisites is to ensure that the bearings in the engine have the life of the main bearing with a long life. Military aircraft engines require more than 3,000 hours, and civil aircraft engines require more than tens of thousands of hours.
Obviously, the life of these bearings is not enough, only 300 hours of life, which will seriously restrict the overall life of this engine.
If there is no excellent aero engine, it means that even if this engine is mass-produced, it will be overhauled every three hundred hours in order to replace the main bearing.
There was a big problem with the bearing, and it is gratifying that the turbine blades of the engine are intact. It seems that these blades will have no problem even if they work for thousands of hours.
For aero engines, turbine blades are also one of the life parts. If the blade life is not enough, it will also be a big problem.
This big problem did not appear. After 300 hours of prolonged test run and high temperature test, these turbine blades are as good as they were before. This is something that made Lin Yunwen feel gratified. The frowning brows were finally relaxed.
Lin Yunwen said with emotion: "Everyone has a look. It is worthy of the super high temperature alloy of Sanlian Special Steel Group. This kind of material is definitely the world's top."
In this engine, many high-temperature components use super high-temperature alloys of Sanlian Special Steel Group, such as turbine discs, turbine blades, etc. From the current point of view, this material performs very well.
Super stainless steel of Sanlian Special Steel is widely used for the cold parts of the engine, such as compressor blades, casing, etc. After inspection, the performance of super stainless steel is also very good, even the color has not changed a little, and it is as new as ever!
On the whole, this engine performed very well, and the only downside was that its domestic bearings did not perform well.
Are there imported bearings on this engine? there must be!
Wang Xudong picked up one of the imported bearings in his hand. This is a small bearing, not the main bearing of the engine.
It is estimated that foreign bearing manufacturers also know that this is not the main bearing of the engine, so they can safely sell it to the aero engine manufacturer of China.
As for the main bearing of the engine, it is generally not sold. Even if it is to be sold, it must be limited and expensive. You don’t own top-level aviation bearings, and others sell them at high prices. You can only pinch your nose to recognize it.
Because of this, Lin Yunwen reluctantly adopted the domestic bearings. Where did he know that the domestic bearings were not strong enough and could only carry them for 300 hours.
Imported aviation bearings can be imagined with their toes, and they must use top bearing steel materials. Wang Xudong quietly activated the "God-class mine owner" system, and started "analysis" with this imported bearing as a sample. "The bearing steel material of this bearing.
Soon, the "analysis" was completed, and Wang Xudong used the system to immediately generate detailed smelting technical materials for this bearing steel.
In other words, as long as this smelting technology information is given to Chen Sanlian, Sanlian Special Steel can smelt this kind of bearing steel.
This is something produced by the system, and the sample used for analysis is imported aerospace bearing. Needless to say, the new type of bearing steel produced must be the top bearing steel in the world. There is no doubt about this!
That's it!
I came here to look for Lin Yunwen. Wang Xudong didn't look at any aeroengine, but the main purpose was to get an imported aviation bearing, analyze it well, and generate a full set of smelting technical data. Now, it has been successfully completed.
In the database of the system, there is a smelting technology data of the world's top bearing steel. Blue is better than blue. The new bearing steel material produced is definitely much better than the imported bearing material used for analysis.
Wang Xudong took this small imported bearing and said with a smile: "Expert Lin, this is an imported bearing."
Lin Yunwen said: "Yes, it is imported, it is an excellent aviation bearing, but unfortunately, it is not the main bearing of this engine."
Because it is a technical blockade, foreign suppliers generally do not sell bearings, but only sell these small bearings, and the price is still very expensive and limited.
Wang Xudong said: "Expert Lin, I can tell you the good news. Sanlian Special Steel Group has developed the world's top bearing steel material and is ready to smelt. It will soon be able to sell a large number of the world's top bearing steel."
what!
Lin Yunwen first stared at Wang Xudong blankly. After several seconds, he finally reacted. He walked over and was extremely excited. He held Wang Xudong's hand tightly, and asked, "Mr. Wang, this is really?"
Everyone nearby, including the technicians, was dumbfounded, feeling like they were hit by a huge pie.
I am worrying about the life of the bearing. Now it's alright, Sanlian Special Steel Group has successfully developed the world's top bearing steel!
It’s the world’s top class. Everyone never doubted it, because Sanlian Special Steel Group developed this kind of bearing steel. Which kind of super stainless steel, super high-strength steel and super high-temperature alloy used in this engine were developed before. Not the top in the world.
It is Sanlian special steel, and then developed a world-class bearing steel, no one would think it is impossible, never doubt it.
Seeing everyone looking at him, Wang Xudong nodded vigorously and said affirmatively: "Yes, the research has indeed been successful, the world's top bearing steel!"
With the world's top bearing steel, and relying on China's industrial strength, can it not be possible to manufacture the world's top aviation bearings? It can definitely be made!
Not only the world's top aviation bearings, but also the world's top industrial bearings, because of the top bearing steel materials of Sanlian Special Steel, they will all be manufactured like bamboo shoots after a spring rain.
Holding Wang Xudong's hand tightly, Lin Yunwen was so happy that he didn't know what to say. He opened his mouth several times, but he didn't say anything until he was too excited.
After a long time, he said, "Mr. Wang, you have done me a big favor again, no, you have helped China's aviation industry a big favor!"
A middle-aged man, sweating profusely, walked over with an anxious look, and reported: "Mr. Lin, our import bearing purchase has encountered a big problem. The overseas supplier that had promised to sell our bearings suddenly changed its course. ."
The domestically-made main bearings are not strong enough, and imported bearings from overseas are not available. If this problem was heard a few minutes ago, Lin Yunwen would have become anxious. Now, definitely not.
Lin Yunwen smiled happily and asked, "Mr. Wang, when will Sanlian Special Steel Group smelt the first batch of bearing steel?"
Wang Xudong said affirmatively: "It will not be more than three months."
With a full set of ready-made smelting technology materials, plus the current strength of Sanlian Special Steel, three months is enough.
After hearing Wang Xudong's answer, Lin Yunwen took a reassurance, smiled happily, and said magnificently: "They don't sell, we don't want it yet, tell them, we don't buy it!"
What, don’t buy it!
What about this engine? It is a new type of fighter engine that the military urgently needs. It is waiting for mass production. Without imported bearings, how can it be mass-produced? Even if mass-produced, it is estimated that the service life of the engine will not increase. .
As soon as he heard that the other party did not sell, he immediately came over in a hurry. He didn't know that Sanlian Special Steel had successfully developed the world's top bearing steel material. He looked at Lin Yunwen with a puzzled expression. His face was happy, and he was even more puzzled.
What's wrong!
Someone among them reminded him ~EbookFREE.me~ patted his shoulder lightly, smiled and said, "Lao Tan, just do as Mr Lin said, we will not buy it, because we will have the world's top We are able to produce the world’s top aviation bearings on our own."
what!
We ourselves have the world's top bearing steel materials, no way!
"Lao Tan is true. Sanlian Special Steel has successfully developed the world's top bearing steel material. Our aviation bearings no longer need to be imported. They don't want to get stuck on our necks anymore. They don't sell them, and we don't buy them. "
So that's the case.
He turned around happily and went to tell the overseas supplier that we don’t want your bearings!
………
The third one is sent!
That's all for today's update, thank you everyone! ! !