Chapter 175: Provide Umbrellas to the Navy and Army (3k)
Gao Zhendong did not ask Duan Gong carefully what the solution he said was, but since he said so, he should be sure of it.
In fact, tungsten copper or tungsten silver materials are undoubtedly more suitable for this situation, but this thing has nothing to do with the Carbon Research Institute. These two things are not even alloys, but use tungsten and these two This thing is made only if the materials are not wetted.
Tungsten-molybdenum alloy can also be used, but again, this is not what the Carbon Research Institute is good at.
However, he still mentioned it to Duan Gong: "If it can't be solved, there are other materials that can solve it, but it is not graphite material or graphite material is not the main one. Graphite material, in my opinion, also has Compared with the silicon-infiltrated materials you have now that are not copper-infiltrated, the tensile strength is higher, the tensile modulus is lower, and other mechanical properties are better, but the thermal conductivity is lower.”
After hearing this, Duan Gong was not interested in the graphite material mentioned by Gao Zhendong for the time being, probably because of the tensile modulus and thermal conductivity issues. However, in fact, the higher the tensile modulus, the better. The higher the hardness, the more brittle and poor the elasticity and toughness.
After all, the Carbon Research Institute specializes in graphite materials. If Duan Gong is not interested, then it will be difficult for him to continue doing what he does best. Maybe the Carbon Research Institute is the professional one when it comes to graphite materials.
But now I have a certain degree of freedom in scientific research. How about I just go to the Carbon Research Institute for Graphite Materials and develop metal materials myself?
Anyway, I have people under my command, and the 17th Ministry of Machinery will give strong support to metal materials. It is just another way to use high-temperature materials for rockets. After all, not everything is suitable for using graphite.
Moreover, in addition to throat linings, metal materials can be used as nozzles, gas rudders, substrates, base materials, and many other places. In this regard, stronger metals have inherent advantages.
After guiding him to see the dawn of solving the ground threat, Gao Zhendong has been thinking about another problem. It may be difficult for me to handle the aircraft, so I will take some time to at least help our navy and air force hold up an umbrella!
But there is no rush now, it’s almost time to get off work, so I invite Mr. Duan and the others to have a meal in the factory. They have come all the way to deliver the components, so it is appropriate for me to entertain them on behalf of the factory.
Duan Gong has found out the material problem in his yard and is overjoyed. Now he has to go through the handover procedures for some graphite components. Gao Zhendong made an appointment with him on a time and place and went straight to the canteen. .
I saw Sha Zhu in the cafeteria when I was having lunch today. Now go over and fix him first. Now Sha Zhu’s craftsmanship is becoming more and more famous. The middle-level and above leaders in the factory are opening in the canteen. Xiao Zao likes to call him chef when entertaining guests, so he has to take action early.
After dinner, Gao Zhendong, Duan Gong, and Shazhu jumped into the car where Duan Gong and the others delivered the graphite components, and went back to the courtyard together.
The car couldn't get in when it was some distance away from the courtyard. Several people got out of the car and moved the things brought by Duan Gong into the courtyard. Duan Gong was very particular and moved himself, Gao Zhendong and Shazhu without asking the Carbon Research Institute. The others who came started to work together.
Of course, drivers at this time, especially those from the public sector, may not pay attention to you if you ask them for help. The Eighth Member is very awesome.
When the things were moved into Gao Zhendong's house, Duan Gong exchanged a few pleasantries, drank a few sips of water, and said that the door was open and he would come back later. He was tired today, so he left first.
Think about it, Gao Zhendong, this man is really a wonderful person.
Gao Zhendong took apart two pieces of roe deer meat from what they brought and handed it to Silly Zhu: "Now, the Chinese New Year is coming soon. One piece for you and one piece for the old lady in the backyard. It can be regarded as a New Year gift, haha. ”
Silly Zhu was not polite to him: "Okay, it's nice to eat it in normal times, but it's not fun to take it. During the New Year, it's like eating you from a big family, haha."
Gao Zhendong suddenly remembered that Lou Xiao'e was at his place at noon during the New Year. At the same time, he said to Silly Zhu: "By the way, on the twenty-ninth day of the twelfth lunar month, are you free at noon? If you are free, can you come to my house to cook a meal for me? By the way, call Yu Yu and the old lady. There are only three of us in the yard. Even if we don’t rely on each other, we can still live happily together.”
Si Zhu was stunned and said, “What’s the rule at your house, is there a New Year’s Eve dinner at noon?”
Gao Zhendong smiled: “In the evening. I'm going to Lou Xiao'e, haha."
Shazhu suddenly realized: "Haha, I forgot about this. It seems that good things are coming soon. Leave it to me when the time comes." >
The two of them agreed on the matter. Silly Zhu said goodbye to Gao Zhendong and staggered home with two pieces of roe deer meat. He also drank a lot with Gao Zhendong and the others in the factory and got a little high. Duan Gong and others As expected, he is from the Northeast and can drink.
As soon as he wandered to the door of his house, someone from behind called him softly: "Si Zhu, Si Zhu."
Si Zhu didn't even need to turn his head, he knew it was Qin Huairu just by the sound of his voice.
He turned his head unsteadily. Under the dim street lights, Qin Huairu looked really good-looking.
Being a bit cocky, he quickly shook his head a few times: "Sister Qin, what's the matter?"
Now slowly, he no longer calls Qin Huairu "Sister-in-law of the Jia family", but starts to call her "Sister Qin". The reason is unclear. Anyway, I don't know when this gradually changed.
Qin Huairu pointed to his hand: "What good things did you bring back today? Let me take a look?" Qin Huairu is also used to getting something from Sha Zhu here. Today Sha Zhu was in the factory with Gao Zhendong was eating, but when he didn't come back after dinner, at least one dish was missing from her table.
Today I saw Shazhu carrying two long things in his hands. There was a vague smell of oil. Although it didn’t smell like pork, it was definitely meat. When I thought about it at home The child, the funeral expenses that were running low, and the upcoming Spring Festival, she simply went all out.
Anyway, Si Zhu is an acquaintance and often helps his family, so he should be thick-skinned.
Silly Zhu hid the thing he was carrying behind his back: "I can't give this to you. It wasn't brought back from the canteen. Zhendong gave it to the old lady in the backyard."
He knew that he had nothing to do with Qin Huairu, so Gao Zhendong Moved out with the old lady.
But although Qin Huairu didn't dare to take advantage of Gao Zhendong's things, she knew Gao Zhendong's character.
"Don't hide it. I don't know what Director Gao is like? If you have the old lady's share, then you must also have your share. I'm not afraid of the old lady's share. I want your share." I'll take some, and I'll buy it with the money."
Silly Zhu thought about it, and it seemed that it was not impossible. The problem now is that it is difficult to buy meat even if you have money. Maybe Sister Qin really can't buy meat.
Anyway, he is not small, and on the 30th of the twelfth lunar month, he has to prepare Luonian's "night" dinner for Zhendong. According to usual practice, Gao Zhendong must have given the rest to himself.
After calculating the inside and outside, it is not impossible to even her out by half.
As he spoke, he opened the door, took out the knife on the spot, cut half of it and gave it to Qin Huairu.
Qin Huairu took half a piece of roe deer meat and said with a smile: "Thank you, Silly Zhu. I will have more money later and give you the money."
Huh? Co-author: Are you coming with nothing?
Before Sha Zhu completely let go of Rou's hand, he was about to pull it back. Qin Huairu's face darkened, and she let go, tears streaming down her face.
Si Zhu looked at Qin Huairu's appearance, and his heart softened inexplicably. With such a mother-in-law in the stall, her two children were pitiful, so she should just take care of Dongxu.
"Dede, de, take it as what I owe you, take it, take it." Silly Zhu, who was sitting on top of Jiu Jin, handed back half of the meat.
Qin Huairu took half the meat and burst out laughing.
It’s so beautiful, Shazhu thought in his heart.
——
After the arrival of the graphite components from the Carbon Research Institute, the basic debugging of the graphite components and other parts of the single crystal furnace was handed over to Yu Yuncheng and others. Gao Zhendong himself was debugging various aspects of the single crystal furnace. control system.
He is planning to transfer the parameters collected by various sensors to the DJS-59 and directly control it with the DJS-59.
The core of automatic control of single crystal furnace is equal diameter control and growth control. Apart from other factors, these two things are mainly affected by temperature and pulling speed, so the precise control of the thermal field in the furnace is The core requirements of single crystal furnace control system.
However, this control process is a typical slow time-varying process, and is seriously interfered by various conditions in the furnace. It is a non-minimum phase system, and it is difficult to control it with general simulation or instrumentation.
To put it simply, the typical characteristics of non-minimum phase systems are slow response, long rise time and adjustment time. If you don’t use a computer to run algorithm control, but rely on an analog system or instrument to control based on input, it will be very difficult, and even reverse. It's very possible.
When Gao Zhendong looked at what he had in hand, he simply went to the DJS-59. This thing can be directly controlled by the PID control algorithm. Although it is a bit wasteful, it is better to make it first. The big deal Apply for another one.
He believed that as long as silicon monocrystals could be pulled out, Machinery Department No. 17 would have no problem with equipping a single crystal furnace with a DJS-59, and would even like to have a few more sets. Besides, there would be more to come later. Is there any other way to solve it?
Different from the power supply of ESR, the power supply of this single crystal furnace needs to adjust its output power at any time to control parameters such as the temperature and melting speed of silicon in the thermal field.
So this time the control system even has to control the power supply, but the rectifier and inverter power supply at this time is not as easy to use as it will be in the future,
In future power supplies, at least semi-controlled thyristors (silicon-controlled thyristors) will be used as power components. Later, there will even be fully controlled GTOs (gate-turn-off thyristors), IGBTs (insulated gate bipolar transistors), etc. Better.
But there are none now. There are only devices such as mercury arc thyristors and high-power electron tubes. Their switching speed, amplification performance and other indicators are very different from the above-mentioned semiconductor power devices.
As for why not yet, look at the names of these power devices: semiconductor power devices, and look at what Gao Zhendong is doing now? Isn't this pulling silicon monocrystalline?
This is a question of which comes first, the chicken or the egg. Fortunately, it is still barely usable, not great, but it solves the problem of whether or not it exists.
(End of this chapter)