The old academician who scolded Lin Hongfei for not learning and not knowing how to do it looked painful, hating iron and not steel.

Only the old academician has such an expression, but if all the materials science experts present are like this with the expression of "mourning his misfortune and being angry", when he looks at the bastard child in his family who "doesn't learn and doesn't know", Lin Hongfei can't stand it: What did I do wrong, you look at me with this expression?

But he immediately realized that the situation was not right: what did the elder say? This kind of single-crystal casting superalloy is the most advanced superalloy technology that European and American countries only began to develop in the 80s?

"That'...... The technology of our company's nickel-based single crystal high-temperature casting alloy is the world's leading level? Lin Hongfei, who realized this, immediately asked the senior elder cautiously.

"To be precise, it is the advanced level of the world, and it can be immediately put into engineering applications," as soon as he said this, the 73-year-old academician had a red face, "Now the common working temperature of the turbine blades of our aero engines is 750 degrees Celsius, and the common working temperature of the turbine disc is 700 degrees Celsius. Do you know that with this nickel-based single crystal alloy, the engine performance of our national fighter can be greatly improved. ”

"That's not right," Lin Hongfei frowned, he remembered a news he watched some time ago: "Senior senior, didn't you say it on the news some time ago, saying that our country was first started in China in the early 80s by the AVIC Institute of Aviation Materials to start the research of single crystal alloy and blade technology, and has successfully developed the first generation of single crystal superalloy DD3 in our country, and has successfully developed China's first single crystal hollow turbine blade in the mid-80s. The development of the second generation of single-crystal superalloy DD6 with better performance has also begun......"

Although the words were not finished. But his meaning has been clearly expressed: the technology you are talking about in the former Soviet Union is still the first generation of single crystal superalloy technology, our country has begun to develop the second generation, what do you have to be excited about?

"I don't understand anything," the senior academician unceremoniously gave Lin Hongfei such an evaluation, but the qualifications of the senior academician are there, he wants to train people, and others can only listen respectfully, "Development does not mean that it can be used in engineering applications, you are also a state official, and you still don't understand propaganda matters?" ”

"Oh oh......" Lin Hongfei nodded again and again. He really understood the words of the old academician: since the Americans and the Soviets have a single crystal alloy, if we don't have it, how can we reflect the superiority of socialism? You have to know that it was the early 80s that had just ended 10 years of turmoil, and the social trend of catching up with the United States was still very popular.

Seeing Lin Hongfei's attitude so correct. Only then did the senior academician nod with satisfaction, looking old-fashioned. "It's really unlearned. Forget it, let me tell you about it, the first generation of single gold alloy appeared in 1982, and the main representative products are Pratt. PW1480 from Whitney, CMSX-2 from Cannon-Muskegon and Rene-N4 from General Electric. The second generation of monocrystalline alloys began in 1988, but was developed to meet the design requirements of turbine blades for high-performance aerospace turbofan engines. The main product is Pratt. Whitney's PWA1484, Cannon-Muskegon and Allison Pre-Research, and Rolls. The CMSX-4 co-produced by Royce and, by the way, the Rene-N5 from General Electric. ”

"Compared to the previous first-generation single-crystal alloy, the second-generation single-crystal alloy has an increase of 28 degrees Celsius in the operating temperature of the turbine blades. And improve the high temperature creep strength, just this year, General Electric and Cannon-Muskegon have announced the start of the development of the third generation of superalloy Rene-N6 and CMSX-10, the purpose is to improve the high temperature performance of the alloy, improve the creep fracture strength, high temperature creep performance than the second generation of single crystal alloy at least 25 degrees Celsius, and strive to increase to 30 degrees Celsius. According to my analysis, it should be to increase the content of refractory elements, further increase the content of rhenium, and at the same time, the performance of low cycle fatigue and high cycle fatigue should also be significantly improved compared with ......the second generation.

Although the elder didn't say anything, the thick disdain on his face was obviously aimed at the words said by the propaganda system: If you don't brag, will you die?!

Many material experts around him looked embarrassed, but the old academician is not only the first person in materials science in our Republic, especially in aviation high-temperature materials, and a well-deserved master of materials science, but also a person from a democratic party, who does not give face to some people...... I won't give it, who will make the family an old qualification.

"Oh oh......" Lin Hongfei nodded again and again, although he is a designer, but it is obviously not good for designers to understand materials, although he can only barely understand what the senior academician said, but this does not prevent him from making his own judgment based on what the senior said, "Then, senior, the first generation of single crystal alloy and the second generation of single crystal alloy of the Americans are mainly quoted in the engine?" What exactly is it? ”

"Of course, it is the engine of the US military's active fighter jet, that is, the current F100-PW-200 various modifications all the way to the F100-PW-229 turbofan engine, well, the specific part is high-pressure turbine and low-pressure turbine," it is rare to meet Lin Hongfei, a young man who is so interested in technology, and the problem of being a good teacher has come up again, "On the high-pressure turbine, the guide blades of the early models of F100-PW-220 are PW1480 single crystal alloy, However, after the second generation of single crystal alloy came out, the mid-term improved models of F100-PW-220 turbofan engine, F100-PW-220E and F100-PW-220E+ and F100-PW-229, the guide blades were improved from PW1480 alloy to PW1484 single crystal alloy, and the outer sealing material of turbine rotor blades was a better PW1485 single crystal alloy; On the low-pressure turbine, the first stage of uncooled rotor blade material PW1484 single crystal alloy with disc IN100 ...... Hey, I'm telling you what this is for, you don't understand. ”

Speaking of the last one, the senior academician waved his hand, quite a little excited.

The old academician looks a little disappointed, but Ms. Guo Yunyi is not, she is also a big bull in the field of materials in the Republic, especially in the field of high-temperature materials, okay? It's nothing more than that he is not as awesome as his husband, at this moment her husband is happy, Ms. Guo Yunyi came to point out the taste of Fang Xuan, and said to Lin Hongfei, "Xiaolin, you may not know the Tao, over the years, the countries in the world attach great importance to the research and development of nickel-based single crystal superalloys, especially the Americans, the investment in this area is simply spared, they have been engaged in this single crystal superalloy since the 60s, and they also know that the Tao was successful in the 80s, since the early 80s, The first-generation single-crystal superalloy PWA1480 and Rene-N4 have been widely used in a variety of aero engines, and have also brought rich returns to relevant R&D institutions: look at how well the F-15 and F-16 fighters using the F100 series engine are sold in the world? ”

"Since the late 80s, the second-generation single-crystal superalloy blades represented by PWA1484, PWA1485 and Rene-N5 have also been widely used in advanced aero engines such as CFM56, F100, F110, PW4000, etc., and the second-generation single-crystal superalloy in the United States has matured and is widely used in military and civil aviation engines. Now that the United States has begun research on the third-generation single-crystal superalloy CMSX-10, we have to catch up. ”

She sighed, and her mood couldn't help but be a little low, but immediately, her mood immediately became high, "However, Xiaolin, the first-generation single-crystal superalloy information you got from Russia is of great significance to our country, with your information, it won't take a few years for our country's fighter to have a more powerful heart......"

Ms. Guo Yunyi said impassionedly, but Lin Hongfei couldn't care so much, and after understanding the value of the single crystal high-temperature casting alloy in his hand, Lin Hongfei immediately became vigilant, "Then what does the country plan for this information of our company?" Is it a plan to nationalize this technique? ”

"Of course," Ms. Guo Yunyi's face was taken for granted, not only Ms. Guo Yunyi's face was taken for granted, but all the academicians of the Institute of Metal Materials of the Chinese Academy of Sciences and the academicians of the Academy of Future Engineering present were also taken for granted, "This is the country's top strategic-level technology, representing the international advanced level of single crystal superalloys, and it will definitely be nationalized." ”

As soon as he heard that he was going to be nationalized, Lin Hongfei's face turned green instantly, "Why, our company spent a lot of money to get it back from Russia, why did the country take back the state-owned in a word?" Besides, it's not the world's top technology, this is the first generation, and the third generation is coming out. ”

"It's not because the country needs these things...... Academician Shi said. (To be continued......)