"Our Shenzhou floating dock has also arrived. The time is just right." When Qin Tao stepped off the huge Kuznetsov, he was pleasantly surprised to find that a huge ship had been moored on the pier in the distance.

The floating dock, the big characters with flying dragons and phoenixes on the side, are very clear.

During this period, there was no delay at all, just in time for the Shenzhou floating dock to arrive.

Thinking of what happened along the way, Yang Xi was filled with emotion. With Mr. Qin, everything is possible. They successfully visited the entire Kuznetsov and listened to the confrontation outside. Later, the Northern Fleet came to respond.

The warships arrived, and the Americans had to leave angrily.

Along the way, he has seen too many things. After leaving the nuclear submarine, he never thought that he would still have this kind of opportunity. It was really rare.

At this time, Yang Xi sighed while watching Uskimenko walking towards them with a man.

"Mr. Qin, let me introduce you. This is Kanishevsky. He is responsible for the scrap iron in the north of Kola Port. He will take you there." Uskimenko said.

After getting this heavy-duty aircraft-carrying cruiser back, there were still many follow-up things, so Uskimenko went to work. Before leaving, he personally introduced the person in charge to Qin Tao, showing his respect for Qin Tao.

of attention.

"Okay, thank you." Qin Tao said to Uskimenko, and then looked at Kanishevsky: "Thank you for your hard work, please take us over to have a look."

Several people got into a Lada car and drove along the Kola Peninsula. After walking for an hour, they arrived at a desolate pier.

Surrounded by white snow, a dark green train appeared on the flat land. This train was still an ancient steam engine. It gasped for breath and dragged four flatbed cars away. On each flatbed, there were

There was a steel tank placed, and on the side that was not covered with snow, the skull logo could be vaguely seen.

"Those things..." Yang Xi said in surprise, but did not continue.

"I guess the items transported inside are dismantled items from the nuclear submarine reactor." Qin Tao said, "These items were transported away and buried deep underground in an uninhabited area, right?"

Kanishevsky nodded: "Yes, you are right, this train runs every three months..."

At this point, Kanishevsky also stopped, and he shouted to the driver: "Ivan, drive slower, let's stay away from that guy, you didn't see the extra installation on our car

Is your Geiger counter ticking numbers right now?”

Ivan stepped on the brakes.

After the train started to leave, it stopped for another three to five minutes before continuing on the road, passing through the railway crossing, and continuing forward.

Retired nuclear submarines, like sharks, float side by side next to the port. It is a freezing day, and the parts of the nuclear submarines that are exposed to the water are covered with a thick layer of white snow, but the sea water next to them does not freeze.

It looks very weird.

"The submarines here have all had their nuclear reactors removed and are already the safest. Therefore, I suggest you choose scrap metal from here. Your Excellency Uskimenko has told us not to treat our good friends badly."

This can be regarded as a coincidence. If it had not been for the experience of driving a warship back with Uskimenko, I guess Lao Maozi would strongly recommend bringing a nuclear reactor. After all, they don't want to deal with nuclear waste. Qin Tao might still

You have to accept it, but now, the relationship between the two parties has become more friendly, so the priority is to choose from the nuclear submarines with the reactor dismantled.

"This is also a nuclear submarine? Is it too small?" Yang Xi pointed to a submarine in front and said.

Yang Xi is a submarine soldier and is very familiar with all kinds of submarines. The submarine in front of him has a very smooth appearance. Even the command tower is perfectly integrated with the submarine body. It is quite beautiful.

But is it too small? According to visual estimates, it is about two to three thousand tons. Even ordinary diesel-electric submarines can achieve this displacement. Nuclear submarines are at least five to six thousand tons.

ah.

However, Qin Tao couldn't help but get excited after seeing it: "If I guessed correctly, it should be a Type 705 nuclear submarine, right?"

Kanishevsky nodded: "Yes, it is our second-generation nuclear submarine."

Only then did Yang Xi react: "Titanium alloy..."

Before he finished speaking, Qin Tao stepped on him and shut up.

"We want the scrap metal price for this submarine!"

Unexpectedly, I picked up a treasure when I came up. I actually encountered a titanium alloy submarine. I bought titanium alloy at the scrap price!

In later generations, titanium alloys have become commonplace. Even eyeglass frames can be made of titanium alloys, which are lightweight and durable. This is also an advantage of titanium alloys.

Specifically, the density of pure titanium is about 4.5 grams per cubic centimeter, which is only about half that of carbon steel. However, the ratio of tensile strength to density reaches 62, and after alloying, it reaches more than 200, while the ratio of ordinary carbon steel

The value is only 36.

In other words, under the same performance, using titanium alloy to build a submarine can greatly reduce the weight of the submarine itself. Under the same weight, the submarine will be very strong and can dive into deeper water.

At the same time, the low magnetism of titanium alloy itself can help submarines better conceal themselves underwater and avoid detection by geomagnetic detectors. Therefore, from the characteristics of the material itself, titanium alloy is suitable as a manufacturing material for submarines.

However, except for the use of titanium alloys in aerospace, we have never seen the use of titanium alloys in submarines of other countries.

The advantages are outstanding, but the disadvantages are even more prominent!

The first disadvantage is that it is expensive. In the era of building 705-class nuclear submarines, the price of titanium alloy plates per kilogram was as high as 14.5 rubles! It is not only expensive, but also complicated to process, because pure titanium and titanium alloys absorb hydrogen after high temperatures

, the ability of oxygen and nitrogen increases significantly, eventually causing the welded joint to become obviously brittle and the mechanical properties to seriously decrease. Therefore, titanium alloy cannot be welded in the air and needs to be protected or even carried out in a vacuum environment.

For titanium alloy welding of aerospace engines, welders wear full suits and get into a fully enclosed welding workshop, just like astronauts. However, for welding submarines, it is impossible to build such a large sealed workshop.

Therefore, welding is difficult.

Lao Maozi's first titanium alloy submarine was the Type 661, which took more than ten years to build. Moreover, as an experimental submarine, only one was built.

Type 705 is the second titanium alloy submarine.

Why do nuclear submarines only have a displacement of two to three thousand tons? Isn’t it because they have to be made of titanium alloy! It’s so expensive, so difficult to weld, and it’s too big. How much will it cost and how long will it take?

Lao Maozi also has to calculate the cost. Therefore, this type 705 submarine has an underwater displacement of just over 3,000 tons. It is simply the younger brother of nuclear submarines. However, relying on the 48-OT3 titanium alloy pressure-resistant hull, it is more powerful than ordinary submarines.

When it can only dive two to three hundred meters, its diving depth can reach 400 meters. Although it cannot be compared with the 685 submarine that is more than 1,000 meters long, it is still very powerful in this era.

Yes.

The size of the submarine is smaller, and other components have to be shrunk. Although the ordinary pressurized water reactor is safe, it is too large. Therefore, it uses the VT-1 lead-bismuth liquid lead-bismuth metal reactor improved from the Type 661 submarine.

, small in size and powerful in power, it has successfully enabled this submarine to travel at an underwater speed of more than forty knots, even faster than some torpedoes. Therefore, when it encounters a blow, it can still rely on endurance like the MiG-25.

win.

But the shortcomings are also huge. Whether it is titanium alloy or liquid reactor, they are all too advanced technologies, and these technologies mean risks.

During the service of the 705 submarine, there were many accidents abroad. For example, the first submarine K-64 had cracks in the pressure hull before it was put into service in 1971. In 1972, the reactor cooled and solidified. In 1974, it was decommissioned and dismantled.

Got it.

The K-123 boat suffered a leakage accident in the primary circuit of the reactor in 1982, causing the entire boat to suffer nuclear contamination.

At the beginning, Lao Maozi built a total of seven submarines of the same model, but none of them survived normally. After they all joined the Northern Fleet, they were basking in the sun on the dock all year round and were unable to go to sea to perform tasks at all.

Therefore, last year, all Type 705 submarines were decommissioned and placed on the dock.

If it were another submarine, just throw it here and it would be over. However, the Type 705 submarine is different. It uses a liquid metal reactor!

What's the problem with this?

What a big problem! Except for mercury, ordinary metals are solid at room temperature. Therefore, after the 705 submarine's nuclear reactor is assembled, it must be in operation all the time, and the heat inside must keep the metal in the pipes.

liquid state.

Other nuclear submarines can just shut down their reactors, but this kind of submarine can just shut down their reactors.

Therefore, other decommissioned nuclear submarines can be placed here to bask in the sun and wind, but the Type 705 is different. After docking at the dock, the reactor must be dismantled and taken away.

Therefore, it definitely does not have a nuclear reactor, and it saves Qin Tao a lot of trouble. However, only this one is not enough.

"Is there any scrap metal of the same type as it?" Qin Tao asked Kanishevsky.

"This K-316 is the first ship to be dismantled. Currently, K-463 is being dismantled. It will probably take a few days." Kanishevsky glanced into the distance. Here

Although it is a submarine cemetery, there are still workers working. The lonely dock in the distance is equipped with cranes and other equipment for dismantling nuclear reactors.

Qin Tao nodded: "Then let's wait a few more days. After dismantling them, we will take away both submarines." Qin Tao said: "Next, let's see if there are any other suitable scrap metals.

"

If you buy two 705 submarines at the scrap iron price, you will make a lot of money from this business. The titanium alloy material used in a 705 nuclear submarine is 600 tons! Qin Tao was very pleased.

In addition to making money, the appearance design of this kind of nuclear submarine is also quite good. If you take it back and study it, it may also bring inspiration to the designers of nuclear submarines.

Qin Tao wouldn't need it anyway. His Mingzhou Shipyard didn't have the ability to tinker with nuclear reactors, at least for the time being.

In addition to titanium alloy and liquid reactors, this type 705 nuclear submarine also has other technologies. For example, in terms of power supply, it uses a specialized 400 Hz, 380 volt AC power system, and an ordinary 50

Hertz circuits are completely different, improving the efficiency of alternating current and reducing the size of various electronic components. They can be taken back for study.

There are also automated attack systems, etc., which are all good.

My floating dock is very large, so it is not suitable to bring only two small submarines. Anyway, I have to go there and see if there are any other scrap metal.

However, all good luck seems to have run out, and none of the remaining submarines are attractive. They are all old-fashioned first-generation submarines with nothing useful inside, they are just pure scrap metal.

"I heard that one of your Type 941 submarines had an accident during the exercise?" Qin Tao thought of the Typhoon class and couldn't help but ask Kanishevsky.

"Yeah, it didn't explode at that time. It's really lucky. The Shark went back to the Severodvinsk Shipyard for repairs."

Like other nicknames, Typhoon was given by NATO. Here at Lao Maozi, the Typhoon-class nuclear submarine is called Shark.

There are many shipyards in Laomaozi. The 444th Shipyard in Nikolayev City is well-known to everyone because it can build aircraft carriers. However, before this shipyard built aircraft carriers, it was not even ranked in Laomaozi.

.After all, the Baltic Sea was the most important place during the Tsarist Russia era.

There are two nuclear submarine production plants in Lao Maozi, the largest of which is the Admiralty Shipyard in St. Petersburg (also called the Admiralty Shipyard, the 194th Shipyard). This factory was established in 1704 and has a long history. After the end of World War II,
To be continued...