The Military-industrial Scientific Research System of the Academic Master Chapter 1030

Chapter 1030 I am torn apart

At this time in August 2002, the Turbofan 10 had been finalized, and the Turbofan 20 project had not yet been officially approved. It happened to be in the gap between the two major models.

For the current aviation power group, Chang Haonan's task at hand is the first priority.

Even among the entire Science and Technology Committee sequence, its importance is at the forefront.

Therefore, his request naturally received a quick response from his superiors and fraternal units.

Especially 621.

Although Institute 621 was retained under the umbrella of the Aviation Industry Corporation of China during the split that year, a research and development team was organized to rush to Haojing in the shortest possible time.

Even came earlier than professors from two local universities...

Chang Haonan didn't do too much, and directly received a group of technical staff from the other party in the archives dedicated to the project team.

Sure enough, the effect is outstanding.

When the leader saw a filing cabinet full of information in front of him, he was so shocked that he even dropped the briefcase in his hand.

After staring blankly at the door for a while, he noticed Chang Haonan sitting not far away.

For a moment, the atmosphere around was a little awkward—

What should I do if the leader is ignored on the first day of reporting? Waiting online, very urgent.jpg

Finally, Chang Haonan stood up and half-jokingly took two steps forward:

"I heard before that Researcher Hang Zhibin could forget about his wife when he fell in love with research materials. When we met today, he really lived up to his reputation..."

Several people following Hang Zhibin also let out a burst of good-natured laughter in cooperation, finally making the scene lively again.

"Hello, Mr. Chang."

Hang Zhibin quickly shook hands with Chang Haonan, and then said:

"Originally, after hearing about your situation two days ago, my mentor Cao Xiaochun, Academician Cao, was planning to come over in person. However, because he suddenly felt unwell, he had to temporarily let me lead the team. I hope Mr. Chang can give me more advice... "

Cao Xiaochun, a leader in the 621 Institute specializing in titanium alloy materials, has presided over the research and development of a series of titanium-aluminum alloy materials and processing techniques, including TC2, TC4, and TC11.

Due to this outstanding contribution, he was elected as an academician of the Chinese Academy of Sciences in 1997.

To a certain extent, the reason why Chang Haonan was able to quickly apply his knowledge to the field of aviation design after his rebirth in 1996 without encountering particularly great resistance in materials was because he had received a lot of scientific research from Academician Cao Xiaochun. dividend.

High-temperature-resistant titanium alloys that can withstand working temperatures of 550°C or even higher are its current focus.

Of course, although it is said to be tackling key problems, it is actually just entering the exploratory stage.

China has indeed developed several titanium alloy materials used in aerospace engines in the past.

But those are used for fans and compressors, which are cold-end components.

It is completely different from Luo Luo, who directly goes to the turbine.

Now Chang Haonan suddenly got thousands of pieces of information, and it was also information certified by Luo Luo.

The 621 Institute naturally hopes to see it as soon as possible.

"Any advice... we can't talk about it yet."

Chang Haonan motioned to the people at the door to sit down around a small table:

"I came to you this time mainly because I need your support in the research and development of titanium alloy materials. After all, Haofa... In fact, including myself, I have never systematically studied titanium alloy materials in the past. I only relied on the British These things given to me are sometimes not enough..."

After all, China did not directly introduce a full set of technologies, so it is naturally impossible for Rolls-Royce to really provide complete information -

It is still difficult to process on the basis of semi-finished blanks, let alone reverse engineering to produce high-temperature titanium alloys with the same or equivalent technology.

At least it's not just a matter of following the information.

"Where is it... Our research team has been paying attention to the direction of computational materials science proposed by Mr. Chang before. There are still many details that we would like to take this opportunity to confirm with you..."

In fact, titanium alloy materials should be divided into two directions.

Some people are responsible for developing the laser processing process, while others are responsible for researching the materials themselves.

However, in the early stages of research, what needs to be done on both sides is exactly the same.

Make representations.

Although the information provided by the British side already includes the microscopic morphology and metallographic structure, this process is still indispensable after it is in China's own hands.

Because the representation object is not just the semi-finished product itself to be processed.

There are also materials that have been processed by different processes, especially laser processing with different wavelengths and pulse widths.

In terms of performance, they can only be regarded as waste products produced during process development. But for materials science, especially the computational materials science that Chang Haonan is studying, the waste itself is also valuable.

Of course, the test does not require Chang Haonan to do it himself.

However, the construction of material type spectra and related databases, as well as the interaction between titanium-aluminum-chromium-niobium-oxygen particles, still require his decision to build these.

To talk about the composition of titanium alloys like the British, it is not complicated.

Ti-47Al-2Cr-2Nb.

Referred to as 4722.

For Chang Haonan, it is a classic product of a generation.

So much so that when he saw the results for the first time, he was not surprised at all.

Because even in the previous life, its improved version 4822 was the first high-temperature resistant titanium alloy put into practical applications in the world.

It's just used by General Electric on the GEnx, which is the 787 engine.

As for the material itself, it was developed earlier.

Now it seems that the reason why it has not been applied in advance is probably because it encountered great difficulties in processing.

After all, without him, the Trent 900 would most likely have to replace the low-pressure turbine with a nickel-based alloy.

Therefore, after the initial preparation phase, Chang Haonan was already ready to overcome difficulties.

But even so, what happened next was still somewhat beyond his expectations—

At the earliest, Chang Haonan's plan was to first use other brands of titanium-aluminum alloys to test algorithms and processes, form a database like nickel-based alloys, and then try to process 4722 materials.

After all, the British gave them a limited number of semi-finished blades.

Although the contract stipulates that normal use during the trial production process will not be included in the processing loss, and Rolls-Royce can also provide new samples later.

But not to mention the delay in international mailing, more importantly, the terms also stated that all processing waste must not be disposed of randomly and must be returned to the British side.

On the surface, this is not surprising.

But it means that if the entire process development process is tested using materials provided by Rolls-Royce, then the other party may be able to infer some useful information from these waste products.

However, after all, the initiative in this kind of matter still lies with China.

Therefore, Chang Haonan thought about using other brands of titanium alloys that can be produced independently for preliminary experiments.

It is equivalent to giving the other party only one answer in the end, and the process is a big "omission".

Anyone who has gone to school should understand this kind of lethality.

However, according to the process parameters fitted through this process, cracks appeared during the first sample test.

It's not even the kind of microcracks that require a microscope to see clearly.

But macro cracks...

"Mr. Chang, according to the test results, the internal shape of the hole is basically up to standard, but the appearance of the hole wall is very unoptimistic."

Lu Qingsong, who was also sent from Institute 606, came to Chang Haonan's temporary office with a test report and a sample in his hand:

"After the probe goes in, you can see very obvious warpage and defects such as burrs. Some of the cracks that spread out from these defects can even penetrate the gap between two adjacent air film holes. part…"

"Let it go first..."

The latter was also holding a photo of the sample in his hand and was having trouble. After seeing him come in, he sighed with a headache, and then pointed to the only place on the desk that was not filled with information:

"Also, let the trial production team pause for a moment. There are obviously some things that we haven't noticed, and they were ignored during the calculation process."

"good."

Lu Qingsong nodded, but did not turn around and leave immediately.

As an engineer who has been fully involved in the development of ultrshort laser processing technology, he has some ideas of his own:

"Mr. Chang, our next step is to adjust the calculation process and fitting parameters first?"

But Chang Haonan shook his head:

"The processing results this time have a bit of a deviation. It may be difficult to adjust the process parameters alone. The process needs to be adjusted."

Having said this, he leaned back in his chair, looking a little hesitant, obviously struggling with something.

After a while, he suddenly continued:

"We need to adjust our strategy... Let's work with Researcher Hang to understand the material forming mechanism and process first!"

(End of chapter)

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