Vol 2 Chapter 606: Lubricating material

Zhou Linlei may still have some concerns, so his words are a bit vague. After listening to his narration, Qin Hai recalled in his mind the equipment that needed this kind of performance material, and combined with the steel No. 98 from the premise of the early Ming Dynasty, he could already guess a few points about the materials that Zhou Linlei cares about.
"Zhou Gong is talking about the sealing material of the steam catapult?" Qin Hai asked with a smile.
High temperature and sealing, these two requirements have been pointed out very clearly. In addition, Ji Ming said earlier that the successful development of No. 98 steel has a close relationship with this work, and No. 98 steel is used to build aircraft carriers. Qin Hai Zai If you can't guess the purpose of this sealing material, it is also known as a material genius.
The so-called steam catapult is a device on the aircraft carrier used to eject the aircraft. China uses the former Soviet Union's Varyag to transform the aircraft carrier, which uses a jump-skip approach, which is only applicable to lighter fighters. For relatively heavy bombers, early warning aircraft, and heavy fighters, taxiing on the carrier deck alone is not enough to obtain sufficient lift, and it is necessary to use catapult methods to achieve the necessary take-off speed.
At present, the only practical ejection method in the world is steam ejection. Its principle is to use high temperature and high pressure steam to push a set of sliders on the deck, so that the sliders are pushed forward at a high speed. The aircraft that needs to eject and take off is connected with the slider. When the slider slides, it drives the aircraft forward. When the aircraft reaches a sufficient muzzle speed, release the slider and the aircraft can fly.
The pipe of the steam catapult is a structure with a gap at the top. There is a piston in the pipe, which can slide under the pressure of high-pressure steam. The piston is connected with the slider outside the pipeline through a connecting piece, and can move the slider together when sliding. The connector must be able to move at high speed along the gap of the pipeline, and at the same time avoid high-pressure steam in the pipeline leaking through the gap. The intermediate seal is very critical. It must meet the requirements of wear resistance, high temperature resistance and good sealing performance. Under these conditions, the requirements for materials are very demanding.
Wu Qinhai had participated in the demonstration of the sealing material of the steam ejection device in the previous life. He had some understanding of this technology, so I heard Zhou Linlei say this. He knew what the other person wanted.
"This ..." Zhou Linlei did not expect that Qin Hai would be able to guess what he was pointing at, and he was a little lost. The construction of the aircraft carrier is a military secret, and the development of the steam catapult is naturally also within the scope of confidentiality. Such confidential things were broken by others. This is very unexpected. He turned to look at Ji Mingchu, wondering whether it was better to admit it or deny it.
At the beginning of Ji Ming, he laughed heartily: "Xiao Zhou, do you understand now? Xiao Qin is not an ordinary person, what you say. I can't hide his eyes. I don't think you need to hide Tibetan mastiff anymore, yes Just say anything. "
Lin Zhou Lei is also in his 50s, but he can only be called Xiao Zhou in the mouth of Ji Ming. Hearing this from Ji Mingchu, he felt a little embarrassed on his face, turned his head to look at Qin Hai, and hummingly wondered where to start.
"According to the information I have read, the steam catapult used on the US aircraft carrier uses a double-layer steel belt as the seal, and a special rubber is embedded in the middle. Zhou Gong now finds it difficult. The steel belt is still rubber. Qin Hai asked, he intentionally brought up the situation of the US military in order to disguise his understanding of the matter, and made Zhou Linlei think that he might have learned about this technology from foreign military materials.
Sure enough, Zhou Linlei listened to Qin Hai talking about the US military and was relieved. Since Qin Hai knew everything about the technology, he didn't need to hide it anymore, so he said honestly: "Comrade Xiao Qin was really well-informed, but he even paid attention to the technology of foreign troops. Yes, we are The steam ejector developed is based on the design ideas of the US military aircraft carrier. It uses two layers of steel belts and one layer of rubber as seals. At present, some research work on high temperature resistant rubber has made some progress, but the steel belt materials on both sides exist With relatively great difficulties. "
"What's the difficulty? Is the processing precise?" Qin Hai asked.
Zhou Linlei shook his head. Tao: "The problem of precision machining can be solved. The difficulty is the wear resistance of the steel belt. The steel belt and the pipe must be tightly combined to prevent steam from leaking out and the steel belt to slide at high speed. We have done experiments. Existing steel basically wears out after about 200 reciprocating slides, which is completely unable to meet practical requirements. "
Even in normal times. The aircraft on the aircraft carrier also needs to take off and land dozens of times a day for daily training. During wartime, the number of takeoffs and landings in a day may be as high as the last time. If the service life of the steel belt is only 200 times, it means that the steel belt must be replaced every one or two days. Changing the steel belt is not a simple operation, and it may take several days to change it. Therefore, a steel strip that can only be used 200 times back and forth is no different from waste, and it simply does not meet the requirements for normal use.
Qin Hai understood this. He nodded and said, "If this is the case, then it is necessary to develop a steel with better wear resistance, mainly because the surface of the steel must have sufficient toughness to allow for sealing. Performance while avoiding wear, right? "
"That's right." Zhou Linlei replied that Qin Hai was able to say clearly the performance requirements of the materials, which made Zhou Linlei somewhat surprised. He always believed that Qin Hai was just an entrepreneur. Even if he knew some technologies, it should only be Limited to some fur. Now hearing Qin Hai say so, it seems like an expert.
"The properties of the material are very clear, but it is difficult to develop. We have invited many steel experts to demonstrate it, but at present there is no good solution." Zhou Linlei said.
"Our materials institute can give it a try." Qin Hai said, in fact, he did not have any good ideas about this steel, but because he was brought in early in the Ming and Ming dynasties, it was incumbent on him.
Zhou Zhou Lei was not polite. He heard Qin Hai take the matter to himself, instead of expressing his gratitude, he asked aggressively: "If you do it, when can you get qualified products?"
"This is really hard to say." Qin Hai frowned. There are many uncontrollable factors in the development of materials. When you are lucky, you may find the right formula and smelting process at once, and you do n’t need to spend much time to solve the problem. But when you are unlucky, you may turn left and right at the gate where you finally found it, and you just have to spend a few years casually. According to Qin Hai's own experience, the latter situation is more common in material development. Researchers often have to walk dozens of times before they suddenly find that the right path is right in front of them.
Zhou Linlei turned his head to the beginning of the Ming and Ming Dynasties, and said with a bitter smile, "If this is the case, our problem has not been solved. The Seventh and Fifteenth Institutes have stated that they can do research in this area, but their situation is the same as Comrade Xiaoqin It ’s because they have n’t got a clear idea yet and can only keep trying. If I do this, I ’m worried that I ca n’t keep up with the equipment.

Qi Ji's eyebrows also frowned. When Zhou Linlei first reported the incident to him, he thought of asking Qin Hai to help. Based on Qin Hai's previous performances, Ji Mingchu felt that he should be able to create a miracle again and solve this problem in a short time. Now it seems that Qin Hai also has some problems that can't be solved.
"Xiao Qin, you have no good way to solve this problem in a year or two?" Ji Mingchu reluctantly asked.
Qin Haidao: "At this point, Zhou Gong is very clear that the requirements for this steel are harsh, and basically the same requirements cannot be found in the civilian field, so it is difficult to find useful products. Americans have readily available technologies, but they have This is also highly confidential, and no public information can be seen at all. If we can find a way to get a little of this steel, even if it is only iron filings, we can increase our research by several times. "
"Iron filings?" Ji Ming thought for a while, then shook his head and said, "Don't think about this idea. We don't have such a strong ability to get iron filings on US aircraft carriers."
"Even if our people can board the U.S. military aircraft carrier, they may not be able to find iron filings. The steel belt and the groove on the pipe are tightly coupled. If iron filings fall inside, the steel belt will wear out long ago." Zhou Linlei Added ~ EbookFREE.me ~ This is also ... wait, what did you just say? Qin Hai responded casually, and then suddenly felt a spark in his head. He seemed to think of an important question, and stared at Zhou Linlei.
"I just did it?" Zhou Linlei was a little confused. He recalled it and said, "I said just now that it is impossible for the steel belt used by the US Army to grind out iron filings. The bonding surface between the steel belt and the pipeline is very smooth. No impurities are possible, otherwise steam will leak out. "
"Yes! That's the sentence." Qin Haimian was pleased and asked, "Can you be sure that they are directly connected? I mean, is there no lubricant in the middle?"
"Lubricant?" Zhou Linlei stunned, then said: "We have also considered this issue. If a layer can be added between the steel belt and the pipe groove, it can indeed act as a buffer, thereby reducing the wear of the steel. But The question is, what kind of lubricating material can withstand such high temperatures? Here is not only the temperature of the high-pressure steam, but also the heat generated by the friction of the steel strip. We have calculated that the instantaneous temperature may reach more than 800. Various lubricating greases are at this temperature. Will break down. "
Qin Hai laughed: "Of course it is not possible to lubricate with grease, but if it is replaced with other lubricating materials, the temperature of 800 is not a problem."
"What material are you talking about?" Zhou Linlei asked Qin Hai staring.
碳 "Carbon, what do you think?" Qin Hai replied with a confident smile. (To be continued.) Xh118