Chapter 60

After listening to Lin Guanghua's story, Zhuang Jianye was also a little surprised. He did not expect that this guy was in the final assembly. He did not expect that when he was about to write a paper in his life, someone sent him an invitation for a core journal. Zhuang Jianye said that he was not interested in it. It was a fake. You know, his father-in-law forced him to write a paper and publish it in order to lay the foundation for further promotion. The bigger the journal, the better it will be The more confident you are.

However, on second thought, it was quickly rejected by itself, because Yonghong factory really lacks the application basis of relevant processes. After all, the brazing process of aviation products is different from that of ordinary industrial products, and each step is very difficult.

If you have time to take your time, it's nothing. It's only a week. It's too short for even the immortals to come down to earth.

So he shook his head: "the time is too short, and the factory lacks supporting hardware. Really, it's not that I don't help you, it's really that there is no such condition."

As soon as Lin Guanghua heard this, his face turned pale. What Zhuang Jianye said was the truth. Yonghong factory did not use the soldering technology, but used the old-fashioned soldering technology of the Soviet Union in the late 1950s. The lack of hardware and equipment was the biggest limitation. Even if the theory was magnificent and there was no practical verification, it was still not convincing.

Realizing this, Lin Guanghua finally accepted his fate. Thinking that he would go to the 23rd branch soon, he was filled with sadness. He sighed, as if he wanted to solve the mystery. He asked, "can you tell me what hardware you need? Even if I fall, I have to figure out where I fell! "

Zhuang Jianye stored water in Lin Guanghua's empty teapot, and then he looked at Lin Guanghua pitifully: "we don't have a vacuum brazing furnace. Our factory doesn't have one at all, but it doesn't matter. The provincial Welding Research Institute has a small test furnace. Anyway, the top cover of the labyrinth is not big, so we can use it reluctantly. The key is the material!"

Hearing that there was a place to replace the key equipment, Lin Guanghua's disappointed eyes gradually regained their look and asked, "what material?"

"Metal felt!" Zhuang Jianye said.

Lin Guanghua was stunned and immediately asked about the specific situation of the metal felt. Since the words were all about this, Zhuang Jianye also introduced the situation of the metal felt.

The so-called metal felt is a kind of material made of metal fiber through non-woven paving, stacking and high-temperature sintering. Due to its good filterability, the general metal felt is generally used in the fields of polymer filtration, electronic high-temperature gas dust removal, etc.

However, aviation grade metal felt is not only a filter, but also an excellent sealing and gasket material. Due to the unique structure and working environment of jet engine, the material used must be durable, light and safe.

Therefore, the general gasket sealing material is not suitable for Aeroengine at all, so people think of using some durable metal alloy sintered metal felt to play this important role, among which the most widely used one is an alloy metal felt with Cr Ni ratio between 0.25 ~ 0.408 and C Ni ratio between 0.12 ~ 0.15.

This kind of metal felt can not only withstand the high temperature of nearly 900 ℃, but also has very good sealing effect. Zhuang Jianye used this material several times in his last life, and the effect is very good.

It's a pity that this kind of material can't be produced in China at present. As for the preparation technology of the material, it's a scientific and technological tree that goes straight into the sky. Zhuang Jianye's own work has not yet been understood, so naturally he can't understand anything else.

Because of this, even if he wrote the technology of labyrinth top cover in black and white, it was useless. It was hard for a skillful woman to cook without rice. Without key materials, everything was in vain.

That's why, after he perfunctorized chief engineer he, he hid from the old man. On weekdays, he didn't talk about brazing technology. There was no way. He really didn't have the conditions. He couldn't say it, but he was beaten in the face. Why bother.

However, Lin Guanghua's reaction seems not to give up. His burning eyes still want to fight.

"Are you sure that the composition of the metal felt is chromium nickel ratio between 0.25 and 0.408; carbon nickel ratio between 0.12 and 0.15?" Asked Lin Guanghua.

"Yes, what? Do you have any Zhuang Jianye asked.

"I didn't, but my wife did!" Lin Guanghua replied.

This time, Zhuang Jianye didn't say anything. He just looked at Lin Guanghua in surprise. Lin Guanghua understood and immediately explained that Zhuang Jianye realized that the old man's lover had participated in the 10th project. During this period, he had tested a lot of high-performance aviation materials, many of which were rare imported products in China, including the metal felt just mentioned.

Coincidentally, these days, Tang Lili often brings information home to rush to work. Lin Guanghua accidentally sees something about metal felt, and even automatically calculates a standard constant for his wife. That's why he is impressed.

There's such a coincidence in the world. If you want to sleep, someone will give you a pillow. Zhuang Jianye can't be surprised. Don't say anything, just do it.