"So I don't know what Elder Wang, you and Huayang Power can do?"

Jin Xiaoqiang asked Professor Wang, and Professor Wang was not polite and directly said his thoughts-1-

"Long before I came to see you, Xiaoqian has mentioned in front of me many times that the finishing level of your Huayang Power is very high, ahead of the same industry level in the country, to be honest, I didn't believe it very much, because in our country, you have to know that the best level of finishing enterprises is our military unit. Later, I looked at your HYWL5000 model machine tool, I have to say that I was very shocked, from this machine, I can see that your finishing level is indeed not low. And Xiao Qian has visited your finishing process production line, according to his description, your finishing ability is indeed not low, although I don't know how you got those high-precision machine tools. ”

When he said this, Professor Wang quietly winked at Jin Xiaoqiang, and Jin Xiaoqiang just smiled, after all, there are some things that everyone knows, and there is no need to put them on the table.

"And I heard that your special steel smelting capacity is also very good, Xiao Qian also described to me, we also purchased a part of your special steel products, conducted corresponding research, I have to say that your product quality is really good, many are close to the international top special steel products level. It can indeed be said to be the leader in China, and even the products of many of our military enterprises are not at the same level as yours. ”

To be able to get the affirmation of such an powerful Professor Wang, Jin Xiaoqiang's heart. Of course, he was a little proud, but he didn't dare to get too carried away, because he knew what Professor Wang said next. Definitely with one''.

This is not a reason for you to be proud, Kim. You must know what I said, your machine tools, special steel, is indeed good, that is, it is the top in the country, if you get the international, compared with the real international top level of products, there is still a certain gap. ”

Sure enough, the next '' made Jin Xiaoqiang feel a little cold. However, what Professor Wang said is indeed true, although in the past few years, Jin Xiaoqiang has been spending a lot of money on various advanced technologies through various means, and some technologies are not something you can get by spending money.

For example, the turbocharged blades used by the Americans to make jet engines. The kind of special alloy used, as well as the special processing technology, is not something that he can get with money, and even he doesn't dare to spend money on such technology, because if he spends money on such technology. I don't know when I'm going to be invited over for coffee by the Americans.

Over the past few years, there have often been news in the United States that scientists have helped our Celestial Government steal classified US scientific and technological information, and although some of them are completely slanderous and slanderous, a considerable part of them are not nonsense, and there is still a certain causal relationship.

"At present, the most critical core component for aero engines is the aviation turbine, and the key to this turbine lies in the blades of the turbine, for example, the tip of its blade has a soft structure, like a very thin piece of paper, which is attached to the outer ring, and rubs against the outer ring when it rotates, but the friction is very small, almost the same as nothing. What's in it for you? When the blade rotates, the air is squeezed and then the back of the blade is pressurized, and the return aerodynamic loss is much smaller. However, it is difficult to make the special materials required for this material, and even if it is made, it is a problem in terms of processing. ”

A difficult point casually raised by Wang Lao made Jin Xiaoqiang feel very headache.

"Many countries think that the manufacturing industry in the United States has declined, they are currently catching up with Germany and Japan in many fields, or even surpassing, such a view is very marketable, and in our country this market is the largest, many people are blindly immersed in the dream of our country's rapid development, in fact, we do not know that we and the United States in the total level of industry and manufacturing capacity, the gap in the level of technology, it can be said that not only is not narrowed, but is getting bigger and bigger, why do you say that, It's because of the mistakes we made in the direction of R&D. For so many years, we have been committed to the manufacture of energy-intensive, low-quality products, but the investment in real R&D projects is not more than a fraction of the others. For example, the two most difficult problems in aero engine manufacturing, the gap between us and others is still far away! ”…,

Professor Wang's remarks, Jin Xiaoqiang is indeed very agreeable, recently many Chinese people have been dazzled by the country's rapid economic growth, thinking that the gap between us and the United States is narrowing, in fact?

Our economic growth depends on the sale of resources and land, and the economic growth of others depends on the sale of creativity.

None of them!

"Don't think that Americans don't do national planning, others do the same. Since the 60s of the 29th century, the Americans have led more than a dozen aviation power research programs in a row by the military and the government, and all of them have achieved very good results. And since 1988, the U.S. and the government have once again led a research and development program aimed at the research and development of a first-class aero engine and a civilian cash engine with a thrust-to-weight ratio of 10, and at that time, the U.S. government, the military and the industry jointly launched a 'high-performance turbine engine integrated technology' development plan, and the program has been a great success, and in 2006 they carried out the follow-up plan of this plan, that is, ' So far, the Americans have come up with the seventh-generation core aero engine, and the aero engine on the F22 they are using now is the fourth generation of these seven generations. According to the American way of thinking, people should be at least thirty years ahead. When we develop products of the same level that can compete with the F22, people can calmly come up with the next generation of products and technologies. Suppress you again. So young man, we still have a long way to go, and the future depends on yours. Your future is a long way to go! ”

Jin Xiaoqiang had heard this kind of argument that Americans were 30 years ahead before, but he didn't believe it very much. And Professor Wang also saw Jin Xiaoqiang's attitude, so he said to Jin Xiaoqiang again very seriously.

"Xiao Jin, don't believe it. I'll just tell you that! Germany's level of industrial manufacturing is amazing, right? ”

Jin Xiaoqiang nodded, it is true that many people now think that the industrial finishing ability of the Germans is currently the top, completely surpassing the United States, and even Japan seems to be stronger than the Americans in this regard.

Japan, as a defeated country in World War II, would not be allowed by the Americans to study jet aircraft, so Professor Wang did not mention Japan. Jin Xiaoqiang can also understand.

"The Germans and the French, as well as some other European countries known for their precision manufacturing, jointly developed fighter jets, and they relied on France and Germany, the two most powerful joint industries, in terms of the engines of the fighters. Their engines are also claimed to have a thrust-to-weight ratio of 10, but their turbofan engines are the same as those of the Americans...... It's still not a level in comparison...... It is the most advanced engine currently taken out by the United States, which is composed of a three-stage fan + six-stage compressor + single-stage high-pressure turbine + single-stage low-pressure turbine, while Germany and France use the pattern of EJ200 and French M88 compressors. It is one stage more than the Americans' engines, and the compressor blades are also more than the Americans', but their engines are still a little worse than the Americans in terms of continuity and stability, so their fighters can only be regarded as third-generation and a half-generation fighters, not fourth-generation aircraft at all. ”

Professor Wang's words. Jin Xiaoqiang was in a cold sweat when he heard it, these countries in Western Europe can be said to be close relatives of the United States, and they are claimed to be quite close to the technical level, but it doesn't seem to be the case at present!

"Let's not talk about the technology of catching up with the Americans now, that is, the technology of the Russians, we can't compare, such as the turbine blades required by this aero engine, this kind of blades must be impact-resistant, high-temperature resistant, and can work in a high-temperature environment of more than 1,000 degrees, maintain no deformation, and can reach a maximum speed of more than 20,000 revolutions per minute, such turbine fan blades are a big problem for us." …,

Professor Wang seemed to be very sad when he talked about such turbine blades, but Jin Xiaoqiang was a little secretly happy when he heard it, in fact, they Huayang Power now has a variable section turbine technology in their hands, and the blades used in it are actually converted from the turbine blades on this aircraft engine.

At that time, Jin Xiaoqiang was also based on the golden finger of his later generations, so he knew the formula of the metal material needed for this blade, and after many smelting tests, he made this kind of blade.

However, unlike the blade grade required by an aero engine, the high temperature that this blade needs to withstand is seven or eight hundred degrees, and it is not necessary to work at ultra-high temperatures of more than 1,000 degrees like an aircraft engine, so it is not difficult to make that kind of blade.

If you want to make engine turbine blades like Professor Wang said, it is estimated that you can do it.

"In fact, in the final analysis, we have two very significant gaps with the Americans in the manufacture of aero engines, and these two points are also problems that have always plagued us. The first is the problem of machining accuracy, this machining accuracy is not the machining accuracy of your workpiece, but the machining accuracy of your entire industrial system, to achieve the most precise processing of each part, and then assemble it together to achieve the best effect. For example, the compressor booster ratio is high, like the compressor pressurization ratio in the United States is very high, and what we are talking about here is the actual pressurization ratio, not the design value. In order for as much air as possible to be pressurized, the compressor must not leak. The compressor blades were so close to the compressor casing that they were almost touching. As a result, air compression is highly efficient. The blades are so close to the casing, and the engine vibrates at 20,000 revolutions per minute, and it is very difficult to ensure that the blades do not rub against the compressor casing. That's why our compressor blades have to be farther away from the compressor casing. As a result, the compressor leaks. The boost ratio is lower. This is not only about the design and manufacture of the compressor, but also about the accuracy of all engine segments. Each section of the engine is welded together with stainless steel superalloy sheets, which will be deformed, how do you ensure the accuracy after processing the casing of these deformations? It's a big problem. You may say that I use the most sophisticated CNC machine tool for processing, and the accuracy of the machine itself is not more than one ten-thousandth of a millimeter. It didn't work. These receivers are soft, and when the tool touches it, it backs back, and when you finish cutting it, it springs again. If you don't master the processing method, no matter how precise the machine tool is, you can't do it. ”

As soon as Professor Wang said this, Jin Xiaoqiang felt a little understood, he used to think that he was engaged in high-tech, but now that he looks at it, he is still far from the real high-tech.

"The second difficulty is the single crystal casting of turbine blades, which is actually a technology in the sixties of the twentieth century, that is, half a century ago. China has not yet mastered that the worst component of the entire engine working environment is the turbine blades. It has to operate at 20,000 revolutions per minute in temperatures of more than 1,000 degrees Celsius, under enormous loads and severe vibrations. The pre-turbine temperature is close to its melting point, and its strength and rigidity cannot be a little problematic. Creep deformation is absolutely not allowed. This requires internal cooling, which requires a hole in the blade. Cooling air is introduced. We can do that. But this is not enough, in order to further increase the engine power, the pre-turbine temperature reaches the creep zone of the superalloy material. The temperature at which the material is used exceeds its creep limit. At this time, it is necessary to try to reduce the number of grain boundaries in the casting process of the blade to resist creep. This precise laser positioning and punching system is the key to this, which we simply can't do. At present, many aviation powers are developing a single crystal blade with a higher level of cooling, and the cooling effect is expected to reach 400~500 degrees Celsius. This higher-level blade means that it integrates advanced materials, advanced molding technology, advanced cooling technology, and advanced coating. So we still have a long way to go! ”

Professor Wang has finally finished teaching, and Jin Xiaoqiang has also gained a lot of knowledge, and he used to know that our aero engine manufacturing level is poor, and there is a gap compared with other foreign goods, but where is the real gap, so that for him, a layman, he really can't understand.

Today, after listening to Mr. Wang's explanation, he kind of understood, it turns out that the gap between us and others is here! (To be continued) RQ