Chapter 667

"The cost of composite materials used is low?"

After listening to Lin Guanghua's words, Professor Ali Khan's slightly cloudy gray eyes under the square glasses narrowed subconsciously. There was no other words, but such a repeated query had already shown the meaning of the expression without reservation.

As for Rahman and Zarif, the members of Pakistan's military delegation at this time, they all set their eyes on the people of Tengfei group, just like a series of X-rays, hoping to see the heart, liver, spleen, stomach and kidney of Zhuang Jianye, Lin Guanghua and others clearly.

How can a high-rise composite material have a low cost?

That thing is the representative of the cutting edge of technology. If it's not expensive, how can it afford high-end and low-cost technology? Do you think Tengfei group is bullying us in Pakistan? Where are you fooling?

Lin Guanghua had long guessed the reaction of Professor Ali Khan and others. He turned his head to look at Zhuang Jianye beside him. Zhuang Jianye nodded. Lin Guanghua showed a knowing smile and immediately called out to a workshop worker not far away: "Xiao Gao, take two pieces of boards."

"All right!"

Xiao Gaojian was called by chief engineer Lin. he answered quickly, and then took down two pieces of metal plate the size of keyboard from his own processing platform.

Lin Guanghua received it, padded it and handed it to Professor Ali Khan: "Professor, look at this."

Professor Ali Khan held the sheet in his hand. The sheet was very thin, about 1.5mm thick, and it was full of metallic luster. It was light in his hand, but it didn't look special.

"This seems to be an ordinary aluminum alloy material. I can't see the details now, but from my experience, it should be aluminum alloy." After a long time, Professor Ali Khan finally came to a conclusion.

Lin Guanghua smiles and hands the other piece to Professor Ali Khan again without saying anything: "Professor, you are looking at this."

Professor Ali Khan took another sheet metal of the same size into his hand. The next moment, his wrinkled face suddenly shook. He immediately looked up at Lin Guanghua and said, "this How is that possible? "

It's no wonder that Professor Ali Khan is like this, because the moment he starts with the second plate, he obviously feels that the weight of two plates of the same size is obviously different, and the first one is much lighter than the second one.

Obviously, the first plate that he judged as ordinary aluminum alloy was lightweight aviation metal material after special treatment, and the second one was the real aluminum alloy.

As a veteran of aviation technology who has worked in Lockheed, Airbus and Boeing for half of his life, he may not be familiar with other metal materials, but aluminum alloy, which is the most widely used material in aviation manufacturing plants, will be very shameful if we don't know about it.

The result is good, oneself beat wild goose all day long, still was pecked by wild goose eye.

"The second one is Al Li alloy, and the first one is our newly developed super hybrid composite, which is not only 15% lighter than ordinary Al Li alloy, but also 2% to 5% higher in strength and fatigue resistance than Al Li alloy."

Just when Professor Ali Khan was trapped in the shadow of wrong judgment, Lin Guanghua's voice came slowly and penetrated his ears. However, Professor Ali Khan did not completely recover from it. Until Lin Guanghua's next sentence, he immediately made Professor Ali Khan tremble as if he had been baptized by divine oil, so that his eyes almost disappeared It's all protruding.

"Of course, the most important thing is the cost of this material. On average, it is about two-thirds of the cost of aluminum lithium alloy, which is basically equivalent to the cost of slightly better ordinary aluminum alloy."

"How could it be?"

Now professor Ali Khan is not incredible because of his wrong judgment. He is really shocked.

Professor Ali Khan has not seen composite materials before, but has used them by himself. He is very clear about the complexity of the process and the difficulty of preparation. Otherwise, the cost of composite materials would not be as high as astonishing.

However, this so-called super hybrid composite material is not much better than the commonly used aviation high-end aluminum alloy in performance. At most, it is a little lighter.

However, in the field of aviation manufacturing, the core is the weight reduction of aircraft. 1% light is a significant progress, not to mention 15% light of ultra hybrid composite materials. Not to mention subversive, it also creates a new field.

We should know that the weight reduction effect of aircraft using this material will be very obvious, and the improvement of efficiency is even more obvious.

How can the cost of such high-quality materials reach the sky high price? The result is similar to the slightly better aluminum alloy.

Professor Ali Khan only feels that the aviation materials science system, which has been in Europe and the United States for half a lifetime, has collapsed. He has a feeling of entering a dream. He doesn't know what year his brain is now.

"Mr. Lin, you're not kidding. It's 15% lighter than aluminum lithium alloy, and the material properties are 2% to 5% higher, but the cost is only two-thirds of the latter. It sounds like a dream."

I don't know how long it took for Professor Ali Khan to react. Although his dark face was still shaking, he didn't say anything perfunctory or evasive because of his face. Instead, he expressed his true feelings.Lin Guanghua nodded: "to be honest, in the process of developing haidongqing type A, when we got this kind of super hybrid composite material, I felt the same as you. I never thought that a composite material would be so cheap, but it really happened. It took me a long time to get used to it."

"Well How did you do that? " Professor Ali Khan asked curiously.

"Very simple, we just replace the aramid fiber in the aramid reinforced aluminum matrix composite with glass fiber with lower cost, and then we have this kind of low-cost composite with the same characteristics as aluminum alloy, but lighter in quality."

When he said this, Lin Guanghua's face was full of laughter, but his heart was full of emotion.

In fact, this kind of super hybrid composite is one of many fiber reinforced metal matrix composites in the R & D center of Tengfei aviation technology. It was tested many years ago. However, this kind of low-cost material was not mature at that time. It can only be said that it was an alternative variety of aluminum alloy.

Until Zhuang Jianye in the audit of haidongqing project found that the cost is not in place, if the unit price of mass production is more than Yun 8, who will buy it at that time.

At this time, Tengfei aviation technology research and development center turned to this glass fiber reinforced aluminum matrix composite in its own technology accumulation.

Then, by using the latest metal matrix composite production process, the weight of the material is greatly reduced and the cost is well controlled.

However, Lin Guanghua can't tell Professor Ali Khan about these details, but even so, Professor Ali Khan opened his mouth in surprise: "God, glass fiber and aluminum, oh, it's really hard to imagine that the combination of these two materials will have such amazing effect!"