Mu Yang has been busy at Shangfei Company for two days and is finally done.

He also visited the leap-1c aviation engine purchased by Shanghai Aircraft Company from CFM International.

Mu Yang has not yet purchased aero-engine technology, and does not know the specific engine technology well enough. However, he has purchased civil aviation large aircraft technology, and is familiar with technologies other than civil aviation large aircraft engines.

He visited the leap-1c aero engine. Academician Wu Hui explained the engine technology to him, but he thought Mu Yang was just curious.

"Academician Wu, it is not easy to manufacture this rotor blade."

The rotor blades of aeroengines have curved surfaces. If conventional machining methods are used, it is very difficult to ensure that each blade is exactly the same.

If the shape is different, the weight will be different, the rotation will not be balanced, and the repetition rate of the blades will be poor, that is, each set of blades will not be completely different.

Now that Xinghai Group has solved the problem of metal additive technology, manufacturing blades is no longer a problem for them. However, like other metal 3D additive manufacturers, the technology is not up to standard and the blades produced have poor material performance and cannot be used.

Wu Hui stood aside and sighed: "It is very difficult to manufacture light turbine blades, especially the blades in the combustion zone, which are subject to high-speed rotation and high-temperature impact of more than 2,000 degrees Celsius, so the blade material for this part is

Heat-resistant alloy steel increases the difficulty of processing. If the processing is not accurate, the repeatability of the blade shape will be very poor, resulting in a decrease in engine performance.

There are many small holes in the blade root. The heat dissipation air from the turbine shaft flows to the outside of the blade through these small holes, taking away the heat from the blade.

It is really difficult to ensure that each blade is exactly the same and has a curved surface.

If these holes are not straight, they cannot be machined using traditional machining methods.

Mr. Mu, now that your company has metal 3D additive technology, it will be much simpler to manufacture engine blades.

If it were before, it would be very difficult for many of our domestic manufacturers to process this blade. Even if it was processed, the performance would not meet the design requirements."

"Haha, yes, this kind of clock-level precision engine has many small heat dissipation holes densely packed in the thumb-sized blades. I have not dismantled an actual engine so far, and my understanding of it is only theoretical. In fact, I don't know

How are these small holes arranged, and I don’t know how the air path is routed." Mu Yang said truthfully, without in-depth study of the engine blades. Some things seem simple, but in fact they are unstoppable.

These blades have different lengths in each stage. The further forward, the thinner the shaft and the longer the blades; the further back, the longer the shaft and the shorter the blades. The molds of each stage are different. When it comes to the combustion zone, the blades of these two stages will also have different lengths.

It's as long as a thumb, but the material and manufacturing cost of these two levels, in terms of weight, are worth no less than gold.

The material contains nickel, chromium, titanium, tungsten and other rare metals, with a larger proportion. These rare metals are not much more expensive, mainly because of the high manufacturing cost. It is required to use a welding gun to burn it to 2,000 degrees Celsius and then smash it with a hammer.

Transformation is very difficult.

We all know that materials will soften at high temperatures. If it is more than 2,000 degrees Celsius, if it is steel, it will melt. Even ordinary high-temperature resistant materials have poor high-temperature creep resistance.

"Academician Wu, the blade speed can reach 10,000 to 20,000 revolutions per minute, and the centrifugal force is very strong. Have you ever experienced a blade breakage?" Mu Yang was a little curious about the consequences of a blade breakage in this case.

Wu Hui is an expert in this field and has been developing aircraft for decades.

After Mu Yang finished speaking, Wu Huile said leisurely: "Of course I have, and the blades in the cold section and the hot section have broken.

Broken blades in the cold section are also very harmful and can shatter the entire engine; broken blades in the hot section can penetrate the engine barrel wall and then penetrate out of the aircraft casing, which is quite dangerous.

Broken turbine blades often occur. If maintenance personnel can find it on the ground, it will be a meritorious service.

There are usually signs of fracture. The source of the fracture may be just a tiny bit of crack. No matter how long or short it is, it is considered a failure. The first person who can find it will definitely achieve third-class merit.

In the past, there were no means of flaw detection. We just relied on sight and no feeling by touch.

Nowadays, PT penetration testing is generally used, but you also know that it is impossible to remove the engine blades for testing. The outer blades can still be tested with PT. The inner blades are inconvenient to detect and cannot be seen with the naked eye, unless it is time for overhaul and the entire engine is inspected.

It can be easily removed for inspection.”

Mu Yang understood what Wu Hui said. PT is the most convenient detection method. You cannot disassemble the engine. You can spray cleaning agent directly on the blades, wipe them with a dry cloth, then spray red penetrant and wait for fifteen minutes for the penetrant to penetrate into the cracks.

, then wipe it dry, and then spray white developer. If a crack is found, it will appear red, because the white developer cannot cover the red penetrant that penetrates into the crack. The efficiency is very fast and can be detected in dozens of minutes.

PT is commonly used to detect cracks on shafts, surfacing STL6 surfaces, etc.

Once a crack occurs, no matter how big or small it is, it must be scrapped, because the crack will extend, just like a piece of cloth, a small gap will appear, and it only needs to be torn open with a little force.

Therefore, cracks are one of the most serious defects.

Wu Hui recalled what happened in the past few years and recounted: "It turned out that there was a training force of the Southern Air Force Air Force, and a section of the turbine blade of a J-5 was broken during takeoff and landing, and the section turned into a spiral.

It is driven out from the passage between the afterburner chamber and the outer cylinder wall and out of the nozzle.

The length of this broken blade is only a few centimeters, but the weight of the symmetrical blade is unbalanced. When the speed is extremely fast, the turbine can reach 11,000 rpm in 5 minutes, and the imbalance is very obvious, so

The rotor immediately spun randomly and became eccentric, scratching a deep dent in the outer ring of the engine and bending the blades.

That plane was lucky and landed safely. If it had been further away from the airport, it would not have survived.

At that time, there was no ejection seat, so you had to jump at a height of more than three thousand meters. You would not be able to survive if you jumped from a height of several hundred meters."

Mu Yang learned a lot of interesting things about previous aircraft from Academician Wu, and his knowledge of aircraft engines deepened.

"Academician Wu, have you ever considered that if the beautiful country imposes restrictions on us, we will no longer be able to buy leap-1c aero engines."

After listening to Mu Yang's words, Wu Hui was silent for a long time before saying: "We have considered your concerns, it is very possible, we just don't know when.

We also hope to gain manufacturing experience from the leap-1c aero engine, and we also hope that we will encounter fewer obstacles in terms of airworthiness certificates in various countries. In fact, it is just a transaction.

We have registered for engines and other core components.

However, there is a long way to go, and it is difficult for domestic engines to meet the conditions."

Mu Yang heard that what he was worried about had actually been thought of by the GUO family for a long time. He just said that there were many things that were very helpless and he was helpless.

Regarding Xinghai Group's entry into aircraft engine research and development, Mu Yang did not tell Wu Hui, and he could keep it secret for as long as he could.

He stayed at Shangfei Company for two days and returned to Tomson Yipin's house for a day on the 22nd.

Then we visited Xinghai Group’s partners and returned to H City on August 25.

I haven't seen the two little guys at home for a few days, and Mu Yang really misses them.

It has been nearly two months since birth and the baby already weighs 12 pounds. The doctor said it is normal and the baby is healthy.

My hair is also relatively long, and since the weather is hot, it would be better to cut it short.

Mu Yang was afraid that he might hurt the child because of his poor skills, so he asked a baby nurse who often cut children's hair to take care of him.

Of course, after finishing the grooming, Mu Yang found that the grooming was not very good either.

But it doesn't matter, as long as it doesn't hurt the child.

"Can't you crawl now?" Mu Yang asked his wife curiously.

"Of course not. It's an exaggeration to be able to turn over in two months. If it were faster, it would take six months to crawl." Song Xuelu explained.

"Oh, I don't understand this very well. Have you taken photos of them recently?"

"I took a lot of photos, every day, and saved them in the computer. When they grow up, they can see what it was like when they were young."

"You won't take pictures with your crotchless pants open, right? If it gets posted online one day, it will be very embarrassing for them, haha."

"Husband, what are you thinking about? I'm still paying attention to this image issue."

"Honey, do you have any photos of your crotchless pants when you were a child? Let me take a look." Mu Yang suddenly remembered this matter and didn't ask.

"No!"

Song Xuelu rolled her eyes at her husband. Even if she did, she couldn't say it was true, let alone let him see it.

Thinking of her husband's business trip to Shanghai Airlines, she suddenly remembered the private jet he mentioned to her some time ago and asked, "Do you really want to buy a private jet?"

"I have entrusted Jiang Jun to help me purchase a second-hand Boeing BBJ3. I used it for half a year and then renovated it," Mu Yang said.

"BBJ3? What model is it? 747?"

"The 737-900 is a business jet modified from the original model. The 747 is too expensive, costing US$400 million."

"How much did you spend on this? Isn't it expensive?"

"I bought it from someone else, and I bought it at a premium. It cost 100 million U.S. dollars, which is more expensive than a new phone. The new phone has been waiting for too long, and it is difficult to deliver the new phone in less than two years. I travel a lot on long distances.

Few, just a few times a year. In addition to myself, it can also be used by employees, otherwise it will be wasted." Mu Yang said, "Just get dozens of seats, and just leave a boss seat for me.

.”

"It's still not safe to fly. If you can, just take it less." Every time Mu Yang takes a plane, Song Xuelu feels a little uneasy.

"Well, if it's less than a thousand kilometers, I'll take a car. Our Future 01 is still safe, even if it's hit by a gravel truck, it'll be fine."

"You still mention this matter. You scared me to death that time. You are not allowed to mention this matter in the future."

Mu Yang felt very happy when he returned home. He had his wife by his side and two little ones. He didn't want to die young.

Regarding the future arrangements for the two children, Mu Yang has discussed with his wife that the children can live happily before they become adults. After they become adults, they still hope that they know some business matters. Even if they do not manage the company, they must at least understand this aspect.

Knowledge cannot be fooled.

After finally setting foot in his current upper class society, how could he allow his descendants to mess around?

He had to face the reality that even in a peaceful society, social classes still exist and everyone wants to climb up.

Not to mention other things, there is still internal fighting in his own company, and the purpose is to climb up. Even if Mu Yang emphasizes team spirit many times, it cannot be avoided.

On the evening of August 28, when Mu Yang was preparing to take a rest, he received a message from the reading system.

Come and achieve something.

[System prompt 1: If your personal wealth reaches one trillion yuan, you will get +500 achievement points]

[System prompt 2: Personal wealth reaches new heights, becomes the richest man in the world, and gains achievement points +300]

Seeing these two messages, Mu Yang felt ecstatic, hugged Song Xuelu next to him, and kissed her a few times.

"What are you doing!"

"It's okay, I just suddenly want to kiss my wife, haha."

"You're already a dad, you're not serious at all." Song Xuelu scolded and continued to fall asleep.

Mu Yang no longer cares about his wife, and his accumulated achievement points have reached 2484.5 points, exceeding 2,000 points.

However, his financial achievements have reached their peak, and it is no longer possible to gain further achievement points from wealth.

With so many achievement points, Mu Yang didn't dare to spend them randomly. He was waiting for the reading system to reach level 7.

The next day, Mu Yang came to the company.

Feng Younan, chief engineer of Nanche Company, which produces high-speed trains, and Luo Ming, vice president of purchasing, brought their team to Xinghai Group. Mu Yang was acquainted with them and received them.

"Mr. Mu, the location of your office building is really amazing. Facing the West Lake, you can have a panoramic view of the entire H City. At first, many people laughed at Xinghai Group for building skyscrapers in industrial parks and spending money indiscriminately. Now,

I stand here and feel that you spent the money right." Luo Ming stood in front of the large glass window, admiring the scenery in the distance.

"Mr. Luo, please stop boasting. They are right. Building Xinghai Building in an industrial park is a waste of money and will not produce any industrial effects. When others stand in the distance and point at our Xinghai Building, they will probably say

, I don’t know which idiot suggested building a skyscraper in an industrial park." Mu Yang said leisurely, "However, now that H City has a height limit, it’s no longer possible to build any more. This is my unique one and the best in the world.

Fool."

"Haha, Mr. Mu is really good at joking. You are very discerning. If others could see it, you would already be the richest man in the world."

After the two parties finished their polite greetings, they began to discuss the purpose of Feng Younan's visit to Xinghai Group: high-end bearings.

Xinghai Group has developed high-end bearings, firstly for bearings used in local automobiles, and also manufactured bearings used on high-speed rail buses.

For a long time, my country's high-speed rail transmission components have basically relied on foreign technology, such as SKF, FAG, and NTN.

China is the undoubted super power of bearings. This year, domestic bearing output may reach 19 billion sets, ranking third in the world. The smallest bearings produced are 0.6 mm in diameter and the largest are 11 meters in diameter. They are everywhere in the sky and on the earth.

That being said, high-end bearings still rely on imports, and even if the import price reaches ten times the cost price, they have to accept it.

There are too many types of bearings, and the breadth of the coverage areas is also complicated.

Xinghai Group has produced top-grade steel with an oxygen content of less than 3PPM. The two most basic and difficult processes of high-end bearing manufacturing, namely raw materials and processing technology, have been solved and applied in the latest Hummer EV and future models. At the same time, it has solved the problem of the country's high-speed rail

Use high-end bearings.

High-end bearings for high-speed rail can be said to be one of the nine key components of high-speed rail. Feng Younan brought his team here to visit the production and manufacturing of high-end bearings of Xinghai Group.

In the early stage, the business department of Xinghai Group has sent some samples to Nanche Company. After their internal testing, they concluded that they are better than imported ones.

Without Muyang's relationship, it would be very difficult to sell products to Nanche Company. No matter how good the product is, people may not necessarily adopt it.

For Mu Yang, bearings are a small business and there is no need to discuss them in person. However, he has a good relationship with Feng Younan, so he accompanied Feng Younan to the bearing steel raw material production workshop and bearing production workshop, and asked the technical manager to introduce the situation to the guests.

After visiting the bearing production, Feng Younan praised: "I went to Laoyang Bearing Group to visit their production workshop and compared the production equipment with yours. The difference is more than two grades, and the process execution is very strict. No wonder your bearings are so good."

"Haha, no way, we can't buy imported production lines, so we can only develop it independently." Mu Yang said with a smile.

"I don't think it's because I can't buy it, but I don't care to use other people's production lines. FAG's production lines are not as advanced as yours."

"Well, I agree with this." At this time, Mu Yang admitted without humility.

Which bearing company is the best in the world? Look for Xinghai in Jiangnan, China!

When it comes to business negotiations, Mu Yang won't get involved.

Bearings used in high-speed rail involve safety issues. Even if the two parties have initially agreed on cooperation, there are still many processes to go through. For example, Xinghai Group's bearings will have to undergo more stringent tests.

If Xinghai Group's bearings are finally chosen, Nanche Group will truly abandon imported bearings, which is indeed bad news for FAG and other importers in Germany.
Chapter completed!