bonanza

Chapter 867 Plasticity

After listening to Yang Dongsheng's words, Liu Weiguo frowned and began to think.

He was the commander of the XX Battalion during the Huaihai Campaign, so now he must be at least in his eighties.

But Liu Weiguo thought about the characters in Taiwan, but he didn't match anyone.

"Is there any problem?" Yang Dongsheng asked.

"No!" Liu Weiguo hurriedly stood up straight, "I'm leaving for Taiwan today!"

Yang Dongsheng nodded and said, "Let's go!"

Back in the office, as soon as he got out of the elevator, Director Li began to report, "This morning, Volcano XX violently erupted again, and the plume reached a height of 50 kilometers! Affected by this, the Hong Kong stock market, which had just opened, plummeted again..."

Outside the office, many people are waiting to meet.

Yang Dongsheng nodded and walked into the office.

Director Li finished reporting the work schedule for the morning, closed his notebook, and looked at Yang Dongsheng.

"Find me a map of East Asia!" Yang Dongsheng picked up the teacup, thought for a while, and pointed to the side, "Just put it here!"

After processing several documents that needed priority processing, Director Li led someone to take out the documents and brought a map at the same time.

Yang Dongsheng started the meeting in the morning, and the first person to come in was Vice President Wang of Dongsheng Heavy Industry.

Vice President Wang handed Yang Dongsheng a thick document, which was a research report submitted by Dongsheng Heavy Industry's "No. [-] Material Research Group".

Just after reading the first page, Yang Dongsheng was taken aback.

"Are you sure?" Yang Dongsheng looked at Vice President Wang.

"We were surprised at the beginning!" Vice President Wang said.

Their latest research found that the nickel-iron alloy produced by Yang Dongsheng not only has ultra-high strength and ultra-high hardness, but also has very good shape.

In general, the hardness and plasticity of materials are contradictory.

The reason is simple. Plasticity is the ability of a material to undergo permanent deformation under static load without breaking.

Hardness is the ability to resist deformation.

Taking steel as an example, the higher the carbon content, the higher the hardness, and the worse the plasticity and toughness.

The intuitive performance is that it will become brittle, for example, it cannot be used to shoot garlic!

To put it bluntly, plastic deformation is the slippage, dislocation, and grain deformation of the grains inside the metal-including a series of changes such as elongation and fibrosis.

The higher the hardness of the metal, the stronger the internal crystal grains, the greater the bonding force between the crystal grains, and the harder it is to displace and deform.

If it is forced to deform, the end result is that the material fractures.

So when Yang Dongsheng saw the hardness of this nickel-iron alloy, he simply didn't ask the question of plasticity.

Instead, they try to find materials with better plasticity and compress them underground.

But the result was unexpected. With the in-depth study of this nickel-iron alloy by the "No. [-] Material Research Group", it was found that it not only has super high strength, but also has super plasticity.

This is so useful!
The nuclear magnetic resonance machines used in hospitals now use superconducting coils made of niobium-titanium alloys.

The superconducting critical temperature of niobium-titanium alloy is minus 265 degrees, which is much lower than the boiling point of liquid nitrogen at minus 196 degrees.

Therefore, the nuclear magnetic resonance machines used in hospitals now need to be cooled with liquid helium.

In order to prevent the liquid helium from evaporating, a layer of liquid nitrogen should be placed outside the liquid helium for heat insulation.

Such a layer of layers is not only complex in structure, bulky, but also expensive in liquid helium.

The cost of purchasing and using the nuclear magnetic resonance machine is very high!
Scientists have not found superconducting materials with critical temperatures above the boiling point of liquid nitrogen.

In the 80s, people discovered copper oxide compounds that can achieve superconductivity above the boiling point of liquid nitrogen.

However, the materials needed to manufacture nuclear magnetic resonance machines not only require materials that can be superconducting, but also have good processing plasticity.

Niobium-titanium alloys co-draw well with copper.

When drawing, the niobium-titanium alloy is usually rolled into a cylinder with a forging press.

Then put a copper sleeve on the outside of the cylinder.

Finally, the niobium-titanium alloy and copper are drawn together into wires, so that coils can be made.

In the previous life until Yang Dongsheng's rebirth, niobium-titanium alloy was still almost the only choice for manufacturing medical MRI machines.

The manufacturing cost of superconducting coil accounts for about half of the nuclear magnetic resonance machine, and it is also the core technology of the nuclear magnetic resonance machine.

More than 80% of the world's nuclear magnetic resonance machine market share is monopolized by "GPS", that is, in the hands of three companies: General Electric (GE), Philips (PHILIPS), and Siemens (SIEMENS).

Whether through acquisitions or self-development.

To put it bluntly, the core technology they have mastered is to pull the niobium-titanium alloy into very long wires.

"GPS" sells MRI machines in our country, usually twice what they sell for in their own country.

Not to mention the expensive purchase price, once there is a problem with the machine, the manufacturer has to send someone to repair it.

The behavior of these foreign monopoly enterprises is a virtue!
Maintenance personnel must at least fly business class.

Even if the hotel you live in is not a five-star hotel, it must be the best in the area.

They go to China as a business trip, and their hourly wages are much higher than when they work in their own country.

Naturally, these costs have to be borne by our hospital.

It's expensive, but the attitude is extremely bad.

No matter how urgent the user is, he will work strictly according to the eight-hour working system.

When they work, they will drive out all the Chinese personnel.

If we dare to touch the machine a little bit, even if we unscrew a screw by ourselves, they dare to declare the machine scrapped, and you will lose tens of millions.

If Dongsheng Heavy Industry can manufacture a nuclear magnetic resonance machine that is directly cooled by liquid nitrogen.

The manufacturing and operating costs of nuclear magnetic resonance machines will drop a lot.

The price of an MRI taken by ordinary people may be reduced to the same level as that of an X-ray.

This is definitely a good thing that benefits the country and the people!

"The problem now is that although this material has good plasticity, it will not break so easily during stretching like other high-hardness materials, but it is too difficult to process!" Vice President Wang said.

This is easy to understand. The strength required to stretch a piece of steel is definitely not the same as stretching a piece of plasticine.

At this moment, Director Li hurriedly opened the door and came in, "Mr. Yang, it's bad, the wind direction in the disaster area has changed!"

Yang Dongsheng was taken aback, "How could the direction of the wind change?"

"At this time of year, the wind direction over there is already very unstable!" Director Li said.

"What kind of wind has it become?"

"Northeast wind!"

Originally affected by the northwest wind, all the airports in the southeast direction near the disaster area have been suspended.

Fortunately, the economy is developed there, and there are many airports.

They can choose to land at the airport around the disaster area, and then drive to the disaster area.

But now it's dangerous.

Yang Dongsheng stood up suddenly, "Which airport was our plane scheduled to land at?"

(End of this chapter)