Great warships

Chapter 474 Got the T-45 back
A beautiful umbrella flower appeared in the sky.

Malandrino's body relaxed and his vision gradually became clearer.

What about Delano?What about that plane?Where did you go?

If it has fallen into the sea, why didn't you see the debris of the plane, and the remaining fuel will pollute the sea area!
Although he was puzzled, he would not doubt his old friend's determination to commit suicide. He just thought that Delano had some special means to plunge the plane directly into the sea, and then continued down to become a submarine.

In fact, with his eyesight, if he turned his head and looked far behind, he could see the T-45 trainer flying close to the sea.

Pfft!
Marandrino entered the water, his parachute dropped before entering the water, and then he pulled the inflated lifebuoy, tried to lie down, and then, just wait.

The moment he ejected, the distress device was activated. The base must have received the news and contacted the helicopter to rescue him. As for the punishment, it will be considered after returning. At worst, it will all be pushed on Draenor The body is healed, and Draenor is dead anyway.

The dead man Delano has completed the process of shelling the golden cicada. He is flying a T-45 on the sea surface. The waves are flying from the bottom of the wing, as if he could hit him at any time. However, Delano is not afraid at all. When he was flying a tomcat, he had already done these movements more than once, but now he just repeated them.

Delano hummed a ditty, and got 1000 million dollars, all in his pocket!
In the vast sea, it is quite difficult to fly with simple instruments. However, the U.S. Naval Aviation has a more advanced means: the global positioning system.

In that war, the global positioning system played a huge role. After that, this device has been more commonly used. The T-45 trainer has this kind of receiving terminal, which allows him to calibrate the route more conveniently.

The needle on the fuel gauge showed that it was halfway through, which meant that his flight had become a one-way plane, and he could never go back, but he didn't care, he was just taking a risk.

This kind of stimulation will make him more enjoyable.

The sun gradually slid to the west, and the sea was sparkling.

Delano looked at the sea and searched hard. After adjusting the direction again, he finally found Zhenhua-[-] which was circling in the distance.

The difference between that special ship and other ships can be seen at a glance, and when Delano flew over, the people on the ship also found the plane, so someone climbed to the highest point of the ship, There waving small flags of two colors.

Confirmed!

Delano looked at the fuel gauge and found that the needle had stopped moving. However, in order to avoid accidents, he still flew around Zhenhua-45 twice until all the fuel was exhausted. He drove the T-[-] and approached the At the surface of the water, the pull ring between the legs was pulled.

The T-45 poked into the sea with a graceful posture. Due to its slow speed, no accidents happened, it entered the water and sank slowly.

A small boat got off the Zhenhua-[-] and headed for the parachuted Draenor.

After Delano boarded the boat, he excitedly said to the responding personnel: "My mission has been completed, and it's up to you whether this plane can be salvaged!"

Unless it is an aircraft carrier, otherwise, the T-45 will not be able to land at all. Even if the tanker is hundreds of thousands of tons, the deck is not flat, and it is full of pipes, unless it is modified, and it can For the carrier-based aircraft to land, the strength of the welded steel plate must be high enough, and there must be Fresnel light boxes and the like.

Therefore, we can only throw the plane into the sea first, and then salvage it.

In order to facilitate salvage, they deliberately found a relatively shallow place. Now the depth of the sea water here is less than 2000 meters, which is the shallowest place that can be found nearby.

However, Delano is not clear about whether it can be salvaged. If it cannot be salvaged, it has nothing to do with him. He has already completed his own task, and the 1000 million US dollars is all his own.

"Of course there is no problem. Our salvage work has already begun." The responding personnel said, pointing to Zhenhua No. [-]. Behind this huge special ship, a crane is sending down a small submersible. The submersible The casing of the watch is shiny, and it is very high-end at first glance.

This is of course the tall Jiaolong deep-diving lifeboat! The seawater of 2000 meters is definitely a piece of cake for it that can dive to a depth of 7000 meters. So far, Jiaolong has completed all sea trials and has officially become a deep-sea all-rounder.

Rescue, salvage, scientific research, proficient in everything, for it now, it is just a small test.

The T-45 fell into the nearby sea area. After the Jiaolong was lowered into the sea by the crane, it immediately tracked forward and downward along the dropped position. When the T-45 finally fell to the bottom of the sea, it also The front and rear feet followed suit.

Tie up the cables with a manipulator, and then connect them to the top for hoisting. When it was dark outside, the T-45 was hoisted into the cabin of Zhenhua No. [-], covered with a camouflage net, and the ship began to return at full speed. .

Everything went well!

When Delano was leisurely returning to the east with Zhenhua-[-], Malandrino took a helicopter and returned to the base. After returning, he reported everything that happened with a pale face, and his leader immediately roared.

"Damn it, it's fine for that guy to seek death, and he wasted our plane!"

"Shall we salvage the plane?"

"No need, that plane is almost at the end of its flight life, salvage is meaningless, and it will cost a lot of money, that damn mad dog!"

No one paid attention to the T-45 that fell into the sea. After all, it was just a trainer.

When the good news came back to the East, Qin Tao was attending an academic exchange meeting at the Capital University of Aeronautics and Astronautics.

Originally, it was not about Qin Tao's business, Qin Tao only wanted to stay in Huating, but the father-in-law called Qin Tao back after a phone call.

When Qin Tao entered the conference room, he saw some familiar faces, including Zheng Ming from the Navy, Luo Yang from the 601 Institute, Shi Lao from the 320 Factory, Wang Hua from Huating, and even Mingzhou Iron and Steel Plant. The technicians, and some others, were unknown to Qin Tao.

After seeing Qin Tao, these familiar people all smiled, especially Shi Lao, who frequently cast expectant glances, which made Qin Tao flattered.

Everyone is here, are they here to discuss matters related to carrier-based aircraft?
"Even if we don't consider the need for catapult takeoff, but only consider the landing of carrier-based aircraft, we still need advanced materials to manufacture the landing gear of the aircraft." Zheng Ming was in charge of presiding over the meeting, and he spoke: "And our land-based The fighter jets of the navy are different, and the carrier-based aircraft of the navy are used in the ocean environment. Therefore, our materials must not only have high enough strength, but also have corrosion resistance. Today, we will discuss this topic. I hope we can solve it as soon as possible this problem."

"Everyone, let me first introduce the development process of our aircraft landing gear steel. This will not take too much time for everyone." An old professor with gray hair said, and after speaking, he looked towards Qin Tao : "After all, Mr. Qin is not in our industry, so he may not know much about it."

Qin Tao smiled: "Thank you."

"The high-strength steel used in our landing gear has gone through three generations." The old professor said: "In the 50s, we mainly emphasized the static strength design, that is, the tensile strength and yield strength of the material. At that time, we used 1175 MPa high-strength steel 4130, 30CrMnSiA and other materials to manufacture by manual arc welding and other methods."

"However, later on, we found that it was enough to use simple static strength to measure, and the landing gear would be fatigued and damaged, so we later adopted the 1580 to 1760 MPa ultra-high-strength steel 30CrMnSiNi2A with higher strength. , 4330M, 4340, etc."

Qin Tao listened very seriously. In fact, he really didn't understand. After all, he was a warship builder. But now, the old professor talked with such relish, he had to pretend to be listening carefully.

"In the 60s, we developed a low-alloy ultra-high-strength steel 1860CrMnSiMoVA steel with a tensile strength of 40 MPa. It has good process performance and comprehensive mechanical properties. It is used in J-80 and Qiang-300, but because of unstable quality, gradually Withdrawal. In order to solve the steel used for aircraft landing gear, in the [-]s, we established a joint research group of the General Iron and Steel Research Institute, the Capital Aeronautical Materials Research Institute, and Fushun Special Steel. After unremitting efforts, we finally succeeded in smelting [-]M steel. This The fatigue crack formation life of this steel material is significantly extended, so that the landing gear and airframe of our aircraft have finally reached the same life."

The old professor can't stop talking about this, because he is the person in charge of the research team of this project, Mr. Zhao!
"Now, the landing gear of our domestic aircraft is made of 300M steel, but this is still the second generation of steel after all, so we plan to continue to research and develop a steel that is equivalent to the ultra-high strength steel AerMet100 used by the advanced fighter jets of the United States. A-100 steel, the strength of this steel must reach two thousand megapascals, and it must also have ultra-high strength and high fracture toughness, excellent plastic toughness, fatigue resistance, stress corrosion resistance and impact load resistance, as our The carrier-based aircraft and the first choice material for the landing gear of the new generation of fighters."

What reflects the basic industrial level of a country is the smelting of steel. This 300M steel has reached the world's excellent level, but it is not enough!

The United States has developed a powerful AerMet100 steel, which is specially used in fighter jets, especially carrier-based aircraft.

Take the famous F-35 as an example. The landing gear of A and B are made of different materials. The former uses 300M steel commonly used in commercial aircraft landing gear, and the latter will use carrier-grade Aermet 100 high-strength steel.

China also needs to develop advanced landing gear steel!
Qin Tao finally understood that today's meeting is probably to decide on the development of aircraft landing gear steel!
"Therefore, we hope that relevant departments can invest funds, like the research and development of 300M steel, and cooperate with important departments in the country to carry out scientific and technological breakthroughs, breakthroughs in key technologies such as ultra-pure metallurgy, precise control of large ingot components, and large-scale bar blank forging. The third-generation aviation ultra-high-strength steel A-100 with international advanced level has been developed to meet the needs of domestic fighter jets. Mr. Qin, what do you think?"

Qin Tao wanted to nod subconsciously, for our carrier-based aircraft to be successfully developed, advanced steel is inseparable!What should be studied by one's own side must be studied.

Moreover, there were personnel from the Mingzhou Iron and Steel Plant present, and maybe they would join forces with the Mingzhou Iron and Steel Plant to tackle technical problems together. He should support it.

But what is Wang Hua doing here?
He is engaged in 3D printing, and he has already achieved a lot of results. What is his purpose for coming here to attend the meeting?
You can't express your opinion easily!
"Is there only such a road in our country?" Qin Tao asked.

"Of course not!" Sure enough, Wang Hua, who was sitting below, said, "These are just conventional technologies. Even if they are materials that can produce landing gear, they are quite wasteful to use."

The waste of this traditional craft is too serious!
You only need to look at the structure of the landing gear of the aircraft. Generally, the landing gear of the pillar sleeve type is used, which is composed of a buffer pillar connected by the outer cylinder and the piston rod. The wheel is directly connected to the lower end of the pillar, and the upper end of the pillar is fixed on the aircraft body. on the skeleton.

This also means that a large forging blank is used, and precision machining is required. The material cut out is many times that of the remaining material, and a large amount of high-strength metal is wasted!

"The outer cylinder of the landing gear and the piston rod are cylindrical components. The traditional forging and machining methods are adopted. The solid part of the cylinder needs to be removed by deep boring and cutting, resulting in waste of materials, and the processing is difficult and the manufacturing cycle is long. Especially , when conducting trial production, it is time-consuming and labor-intensive to process brand new parts. Therefore, we believe that it is the best solution to use our 3D printing technology, rapid prototyping, and change the design at any time. We believe that 3D printing technology manufacturing The landing gear that comes out can fully meet the needs of use.”

Sure enough, just as Qin Tao thought, Wang Hua came here because he wanted to use 3D printing technology to make landing gear!

His courage is getting bigger and bigger. He used to only make small parts. Later, with the investment of Anxi Kingdom, he began to make some larger titanium alloy parts. It is said that he recently made a titanium alloy wing with 3D printing technology. box!
"Moreover, no matter what kind of steel is used, 300M or A-100, it cannot resist the corrosion of seawater. Therefore, it is necessary to add a coating on the outside to improve the corrosion resistance. If titanium alloy is used, there is no need to do any treatment on the surface, just Can satisfy the use."

"Yes, this technology can be used, but the cost of using titanium alloy to manufacture aircraft landing gear is too high!" Mr. Zhao said: "We know that Mingzhou Group has a source of titanium alloy, but if Is this batch of titanium alloy used up? What’s next? The cost will definitely rise.”

What is titanium alloy?
The most expensive aerospace metal!Only when Lao Maozi has a mine in his home, can he luxury use titanium alloy to build it. Other countries dare not do this, even the United States.

The current domestic titanium alloy 3D printing technology has gradually matured and can manufacture various parts, but what about in the future?After running out of Lao Maozi's titanium alloy submarine casing, what will I use in the future?
You have to think about it for a long time!
Qin Tao finally understands, no wonder he was asked to come, he came to make a decision, what kind of technical route to take, this is too critical!

"President Qin, President Qin!"

Someone called Qin Tao a few times, and Qin Tao recovered from his thoughts.

"Boss Qin, which of these two technical routes do you prefer?" Zheng Ming asked Qin Tao.

"I'm just a shipbuilder, and I'm really not familiar with these technologies." Qin Tao said.

He is really not familiar with it, so he can't comment on it.

However, Zheng Ming will not let him go, Zheng Ming said with a smile: "Mr. Qin, you, a layman, often have more reference than experts' opinions. In my opinion, you should give me an opinion!"

Qin Tao thought for a while: "At present, the two solutions have their own advantages and disadvantages. Using 3D printing technology to form one-time molding saves raw materials, but the materials are more expensive. Using our high-strength steel and traditional craftsmanship to manufacture is wasteful. If Let’s combine the two methods together.”

When thinking of this, Qin Tao suddenly had a big brain hole: "If we use 3D printing technology, but instead of using titanium alloy, we use this kind of high-strength steel, whether it is 300M steel or A-100 steel that we plan to continue researching. , Will manufacturing in this way solve all the problems?"

Can 3D printing only use titanium alloy?

The answer is of course no, since titanium alloys can, then other alloys should also be able to!

Using 3D printing technology, that is, melting special steel with lasers, to manufacture landing gear?

Everyone was stunned by Qin Tao's idea.

"Old Wang, you are an expert in this field, do you think it's okay?" Qin Tao looked at Wang Hua.

Wang Hua frowned, pondered for a moment and said: "I think it is feasible, as long as the relevant units provide us with relevant special alloy wires, we can try to melt these alloy wires with lasers, and then directly deposit them to form related products."

"Is this okay? Is the structure not strong enough?" All the old experts present began to question.

"At least we have achieved the relevant performance requirements in the use of titanium alloys. The strength of titanium alloy parts manufactured by 3D printing technology is no worse than that of forgings. As for this new type of alloy, such as 300M, we still need to go through some procedures. Experiment." Wang Hua was very strict.

He can't pat his chest and say yes here, it would be irresponsible, but he can try.

Definitely another breakthrough if you can.

Through the use of advanced processing technology, the purpose of simplifying the production process and saving costs can be achieved, and at the same time, rapid trial production can be carried out. Such an operation can be tried.

"Then, are we still studying our advanced steel?" Mr. Zhao asked.

"Of course we need to study. In addition to carrier-based aircraft, the new aircraft we will develop in the future also need world-class steel." Qin Tao said: "Since Lao Wang said to try, I think we can walk on two legs. On the one hand, Try to use 3D printing technology to use the existing 300M steel to manufacture the landing gear, on the other hand, we also need to develop a new steel, and strive to reach the world's advanced level."

Zheng Ming smiled wryly there, Mr. Qin, what you said is simple, the research and development of a brand new steel product will cost a huge amount of money, you know that we can't afford it!

Perhaps because he knew what Zheng Ming was thinking, Qin Tao said: "The personnel from our Mingzhou Iron and Steel Plant are also here, so we can also join in the fun and put the research work in our Mingzhou Iron and Steel Plant. All technicians, They all go to our Mingzhou for research, we fully invest, and of course, the final steel production will also be placed in our Mingzhou Group."

Zheng Ming nodded: "Okay, then follow what President Qin said."

Investment is the most important thing. To develop a new steel product is actually to keep trying over and over again. It takes a lot of effort and a lot of money. If Mingzhou Group undertakes this project, they will produce related steel products in the future. That is logical.

Anyway, Mingzhou Group has plenty of money.

"As for the use of 3D printing technology to manufacture landing gear, the funds still need to be provided by the Navy. I have a hunch that this will be easier, and a breakthrough may be made in a few months. At that time, we can use it first, even if the lifespan is not enough. In the mid-term To replace the landing gear, we must first achieve independent production.”

Zheng Ming nodded.

This project, just like this, is very important for the development of two types of fighters.What's more, Qin Tao didn't know at this time that this kind of high-end 3D printing technology is quite suitable for manufacturing aircraft landing gear, and it is simply a revolution.

Break through the specification limit, reduce the waste of raw materials, shorten the processing and manufacturing cycle, ... moreover, the most critical anti-fatigue performance has also been improved by 20.00%!

Originally, Qin Tao planned to stay and discuss with everyone to see how the development progress of the two carrier-based aircraft was. Their simulation base was still waiting.Moreover, since he has come to Capital University of Aeronautics and Astronautics, he can also see if there are any talents he can poach. Qin Tao had thought of setting up a private aerospace company before.

However, before Qin Tao said anything, Xu Zhengyang came in and whispered something in his ear, so Qin Tao was instantly overjoyed.

"Everyone, if you have nothing to do, I will leave first. By the way, Mr. Shi, if you have nothing to do, you can go with me!"

Mr. Shi originally came here for soy sauce. Although their project also needs to use landing gear with the strength of a carrier-based aircraft, their aircraft is light after all, and the existing ones can make do with it. At this time, hearing Qin Tao say this, Elder Shi suddenly thought of something and was excited.

Shi Lao and Qin Tao came out together and got into the car outside.

"President Qin, is the prototype here?" Elder Shi asked excitedly.

"That's right, the prototype is here!" Qin Tao nodded: "This plane arrived at the dock of Zhenhua Group along with Zhenhua No. 26, and we went there to pick up the goods. Then stuff it into the cargo bay of our Mi-320 helicopter and ship it directly to Factory [-]!"

The cargo compartment of the Mi-26 is 12 meters long, just enough to fit the T-45, but the width and height are not enough, so it is enough to remove the wings and vertical tail.

"Well, I contacted the factory and asked them to send the technicians to Huating! By the way, we also brought the test pilots there, maybe we can fly this kind of aircraft back directly!"

Qin Tao smiled and shook his head: "Do you dare to fly a plane soaked in water?"

If you don't soak in water, you can't get the plane back without anyone knowing it. Although it hasn't been soaked in sea water for a long time, it's still soaked in water. If something goes wrong and it falls into the sky, then There will be big troubles.

It's hard to get a second one.

(End of this chapter)