Chapter 107 Is the ESR enough? If not, I have more

Mr. He and the others turned around and saw a tall, handsome young man standing at the door.

Mr. He stood up and held out his hand. “Hello, Comrade Gao Zhendong. I’m He Jingli from the Grassland Tractor Factory. I’m working on the same project as Mr. Guan who visited you last time. I’m in charge of guns and artillery.”

Gao Zhendong remembered that last time he was talking excitedly with Mr. Guan from the Grassland Tractor Factory and wanted to talk about the firepower part, but Mr. Guan stopped him and said that he wanted to invite their chief gunner to come and listen in person.

It seems that the armor is quite effective, breaking through the defense of the one who was responsible for the firepower, so they came to find me.

Gao Zhendong extended his hand enthusiastically and shook hands with Mr. He: "Welcome, welcome. Hello, Mr. He. Hello, Mr. He."

Mr. He introduced the people he brought with him to Gao Zhendong. They were all the core members responsible for firepower. It was obvious that he attached great importance to this communication.

Gao Zhendong shook hands and greeted everyone who was traveling with Mr. He one by one. Probably to maintain confidentiality and avoid suspicion, the people from the computing institute did not follow up here. Gao Zhendong himself also sat down next to Mr. He.

"Mr. He, what do you want to ask me this time when you come to Beijing?" Although Gao Zhendong knew roughly why they came, he couldn't just come up and say, "Is there anything you want to ask me?"

Perhaps because he saw that Gao Zhendong was too young, Mr. He showed a bit of embarrassment: "Hello, Engineer Gao, this is what happened. Last time, our Mr. Guan came back from your place and brought back a lot of good stuff. He hit me hard in the face several times at the shooting range, haha."

Mr. He didn't say everything explicitly, but Gao Zhendong knew that his guess was correct.

The thing that Guan brought back that impressed him the most was undoubtedly his work nemesis: the one who deals in firepower.

Gao Zhendong also cooperated and showed a bit of embarrassment: "Hehe, I was just daydreaming. I hope it works."

Young man, you are being disrespectful. Mr. He is a little upset, and you are making me look bad just by imagining things? Are you being modest or are you deliberately hitting me in the face?

But there is no way, being bad is the original sin, and I just can’t handle it.

Mr. He had no choice but to take the initiative to explain his purpose: "Comrade Zhendong, I heard from Mr. Guan that you also have some ideas about firepower. Last time, due to professional reasons, he was not able to communicate with you about this matter. After I cooperated with him to complete the test of the results he brought back, as soon as the results came out, he urged me to come to you."

Gao Zhendong smiled and said, "Yes, yes, that's right. At that time, I thought that since General Guan was here, it was all about the tank, so I just asked him to convey it. But General Guan attached great importance to confidentiality and professional division of labor, so we didn't communicate about this. Now that General He has come here in person, that's great."

Mr. He and his entourage took out paper and pen to record their conversation with Gao Zhendong.

Gao Zhendong waved his hand and said, "Well, Mr. He, I have training to attend later, so I don't have much time now. I just came here to confirm what's going on. You guys won't leave Beijing today, right?"

Mr. He was a little embarrassed: "I'm sorry, Comrade Zhendong, we are affecting your work. We are here to learn from you. We will not leave until we get the scriptures."

Gao Zhendong was very happy. After all, he was still in the training process and could not spare much time to communicate with them. However, if he missed this opportunity, it would be a pity if what he had in his head could not be realized in the development of 5DL or even the next generation of tanks.

Although I can leave the courtyard for a short time, if I go to the Grassland Tractor Factory specifically, it will probably take 10 to 20 days to go back and forth, which is too long.

Now that Mr. He and his team are here, it would be great if I could take this opportunity to dump out everything in my head. What's more, I once won a book on tank weapon stability and control in a lottery, so I have a channel to use it.

Since Mr. He won't be leaving in the short term, things can be easily arranged.

Gao Zhendong thought for a moment and said to Mr. He, "Mr. He, I'm not free at the moment, but it's not appropriate to let you wait. Let me write you a note. Go to the Technical Department of the Third Steel Rolling Plant and find Engineer Liang Faming of the First Research Laboratory. Ask him to show you some comparative test records of electroslag remelting and refining alloys that we have been doing recently. You must be interested in this. Get familiar with it first. Then you can stay at our factory's guesthouse. I'll come over in the evening and we can have a good chat there. What do you think?"

In fact, one of the basic technologies for the takeoff of domestic artillery is ESR.

Of course, there are other technologies. Although Gao Zhendong did not master these technologies, he had no problem in proposing the principles. Mr. He and his colleagues are also top technical talents. It should not be difficult for them to come up with something with the principles and ideas.

Hearing that Gao Zhendong's arrangements were both tight and thoughtful, Mr. He also felt that it was very suitable, so that no one would waste time or delay things.

Seeing that Mr. He agreed to his arrangement, Gao Zhendong took out a pen and paper and wrote a note, inviting them to go to the third steel rolling mill.

Holding the note, Mr. He walked out of the operation office, scratching his head, wondering how he got to the Third Steel Rolling Mill again.

He said he was here to learn from others, and it seemed to be true. Although it was not as difficult as going through all the difficulties, it was still a long journey. He came to the Third Steel Rolling Mill with Gao Zhendong's note, and Mr. He quickly found Liang Faming through Mr. Chen.

After Liang Faming verified Gao Zhendong's license certificate, he took out a document from the database.

It does not involve other things, it is just a comparison of various aspects of the same material before and after ESR refining.

Mr. He took the materials and read them carefully by himself. The materials obtained in this way were not qualified for other accompanying personnel to read.

Mr. He himself is actually very experienced in refining special alloys. Their existing cannon steel is made using a vacuum induction furnace.

However, after he read the ESR's test comparison records item by item, he couldn't help but applaud and praise it repeatedly.

This made his entourage feel itchy. What good thing could make Mr. He so excited? However, despite this, they knew the rules and did not ask too many questions.

The special alloy refining of the Third Steel Rolling Mill adopts the method of vacuum induction furnace (VIM) + electroslag remelting (ESR).

Mr. He is familiar with the characteristics of VIM, so when he saw that after ESR refining, on the basis of VIM, ESR materials showed further advantages such as high purity, low sulfur content, few non-metallic inclusions, smooth surface, uniform and dense crystallization, uniform metallographic structure and chemical composition, etc., he was very familiar with this aspect, and his first reaction was: "I can increase the chamber pressure again, Lao Guan, you wait!"

For artillery, the most basic thing is chamber pressure, which is everything. If the chamber pressure can be increased safely, it means range and power. The so-called chicken blood cannon is one that increases the chamber pressure without taking into account the issues of safety, reliability and lifespan. If all these can be taken into account, it is not a chicken blood cannon, but the truth!

When Liang Faming saw that Mr. He had finished reading the materials, he took them back and took Mr. He to watch the ongoing ESR sliding crystallization experiment from a distance. Mr. He drooled as he saw this product. The aspect ratio of this product is so large that it is naturally suitable for making gun barrels. As the saying goes, the longer and thinner, the stronger the lethality.

Since Gao Zhendong was not around, there was only so much Liang Faming could do.

Having seen some initial hope, Mr. He and his companions stayed in the guesthouse of the Third Steel Rolling Mill, anxiously waiting for Gao Zhendong.

At dinner time, they finally waited for Gao Zhendong. Gao Zhendong finished class a little early today and came all the way to treat Mr. He and others to dinner. After all, they came from so far away, so Gao Zhendong still had to observe basic etiquette.

We invited Mr. He and his friends to have a meal in the small canteen. The dishes were cooked by Sha Zhu, so we could contribute a little to Sha Zhu's small lunch box. It was obviously not appropriate to talk about these things in the canteen, so Mr. He and his friends ate in a hurry, thinking about something.

After dinner, Gao Zhendong brought Mr. He and others to his office.

Several people sat down. Gao Zhendong poured some water, sat down and asked with a smile: "Mr. He, what do you think of our electroslag remelting test records today? Can they be used?"

Mr. He slapped his thigh and said, "This is really useful. With this alone, I can increase the chamber pressure of our gun by a large margin!"

Gao Zhendong nodded: "Yes, that's what I thought too. The electroslag remelting + single-barrel self-tightening technology can greatly increase the chamber pressure of your guns. Not only your guns, but any guns, these two things are very effective."

"A single flesh tube tightens itself?"

Mr. He and his team were very familiar with the barrel self-tightening of artillery, but single-roulade barrel self-tightening? For a moment, they were even unsure which of the two words "single" and "roulade" meant, so they had to write "dan rou barrel self-tightening" in their notebooks.

It is normal that Mr. He and his colleagues are not aware of this technology now. The world's earliest single-barrel self-tightening technology appeared on John Bull's L1959 7 rifled gun in 105.

Before this, the barrel of a high-pressure gun basically had two layers, a hard inner layer and a tough outer layer.

The two layers of gun barrels are installed with interference fit. Simply put, before installation, the outer diameter of the inner tube is larger than the inner diameter of the outer tube. Once installed, they cannot be pulled apart.

As for how to put it in? As the saying goes, big factories rely on freezing, small factories rely on burning, and roadside stalls rely on banging. Anyway, everyone has their own tricks.

Earlier, for example, the navy's large-caliber naval guns even used steel wire wrapped around the outer layer to ensure the strength of the gun barrel.

It looks like a simple gun barrel, but in fact, even in the future, the number of countries that can produce it beautifully can be counted on one’s fingers. As for tank guns, which have more demanding working conditions, even one hand is enough.

Hearing their questions, Gao Zhendong smiled and said, "Yes, it's a single-tube self-tightening, or a single-layer tube self-tightening."

(End of this chapter)