Chapter 905: Special-Shaped Air Film Hole, Drilling Successful!

Preparations before the start of trial production lasted almost a week.

In fact, although the entire testing workload is heavy, it is basically repetitive work, so the process itself is not complicated.

It was already arranged for the next day.

But anyone who has ever been in a factory (regular factory) knows that safety training takes up the longest time before starting work.

Ordinarily, those chosen to come to the capital are all master craftsmen, but the situation of laser processing is different from mechanical processing after all, and the equipment itself is not very stable.

Therefore, Chang Haonan and Academician Hou even spent two days demonstrating some precautions in the operation of this equipment.

Finally, everyone was given two days off.

After recuperating, trial production officially begins!

As usual, this first process test naturally requires a very high specification configuration...

As the head of the production technology group of the Turbofan 10 team, Zhong Shihong fixed the first turbine blade that had been coated on a special fixture.

Immediately afterwards, Chang Haonan, who was sitting in front of the computer, copied the process parameter setting code that he had written before into the command line interface——

Due to the tight schedule, there was no time to design the UI interface of the control system. Settings could only be made by connecting an external laptop and inputting operating commands on site.

Han Zhigao, who leads the light source control team, turns on the power insurance of the laser and opens the valve of the solution circulation module.

Huo Penghua, the leader of the signal transmission team, conducted routine safety inspections before processing.

…

The testing workshop in the laboratory is naturally not large.

There are nearly thirty people in the entire team, and several of them have to run before and after, so it is indeed a bit crowded.

However, under the command of Chang Haonan, the entire boot process was carried out in an orderly manner to the end.

Academician Hou Xun, the general person in charge of hardware research and development, personally pressed the yellow button to start processing...

"Buzz——"

With a slightly harsh buzzing sound, the micro vacuum pump started working, pumping the special neutral salt solution stored in a tank not far away into the workbench.

The surface of the workpiece is slowly immersed in the liquid.

At the same time, several consecutive sets of booster coils increase the current in the high-voltage system to the laser's operating level.

In order to prevent some relatively fragile electronic components from thermal breakdown, a cooling system that has nothing to do with the processing itself but is bulky and essential has also been started.

"If there are superconducting materials with relatively strong availability, the working efficiency of the entire laser can continue to improve."

Academician Hou leaned on a table, looked at the equipment that was still in the yellow light (waiting for processing), and slowly said to Chang Haonan next to him:

"Although some optoelectronic technologies are used at the control signal level, the energy system still uses electricity. Now the thermal effect is more obvious. In addition to the time-consuming preparation phase before processing, the allowable continuous working time of the entire laser also has to be used. The lifespan is not very satisfactory either.”

Hou Xun is already quite old and may be forced to withdraw from the frontline of scientific research at any time due to physical reasons.

Therefore, he was even more eager to seize this last opportunity and personally implement the technology he had studied for many years.

And, to achieve perfection

"I have considered this before."

Chang Haonan replied helplessly:

"But current research generally believes that the road to copper-oxide superconductors has been exhausted. The upper limit is basically around 130K, and it can only be realized at a very ridiculous high pressure. There is almost no possibility of being put into application..."

Now that we have decided to go in the direction of computational materials science, high-temperature superconductivity and even room-temperature superconductivity will definitely be a technical difficulty that must be overcome sooner or later.

However, before his rebirth, Chang Haonan did not know much about the field of superconductivity, so he was unable to gain as much foresight as in the aviation field.

We can only rely on some papers from this era to understand the situation.

He had probably heard of some concepts of iron-based or nickel-based superconductivity, but after checking a series of information, he found that in 2001, the academic community still seemed to be inclined to believe that iron was not conducive to the formation of superconductivity.

Obviously, there should have been an evolution on a theoretical level.

So the workload involved probably won’t be too small.

Chang Haonan currently cannot spare much time to systematically engage in research in this area.

If we just create a few scattered superconducting materials based on the few words I heard in the previous life...

It may not be difficult to write about Nature or Science.

However, it is not what Chang Haonan really wants.

He doesn't lack those papers.

On the contrary, it is possible for competitors to notice this direction in advance.

Therefore, superconductivity is an "important but not urgent" issue on Chang Haonan's timetable, and is ranked relatively low.

Looking at Academician Hou who looked melancholy, he wanted to say a few words of comfort, but for a moment he didn't know how to speak.

You can't tell people that if you insist on living a few more years, you might be able to see that day...

Fortunately, at this time, the long swing forward of casting the spell is finally over.

A weak, but clear and crisp sound of "pah-pah-pah" interrupted the somewhat oppressive silence at the scene.

This is the sound the ultrashort laser makes when it is working.

At this time, the laser processing light source has also been immersed in the salt solution together with the workpiece.

In a place that no one can see, the laser beam is continuously strengthened and narrowed through a series of components such as the pump cavity, aperture, output mirror and beam expander, and finally emitted from a partial reflector and hits the surface of the turbine blade to be processed.

After 10 femtoseconds, due to the intense inverse bremsstrahlung radiation, the electrons around the metal atoms begin to absorb the laser energy, and the average kinetic energy increases rapidly.

In the following 90 femtoseconds, the increasingly violent collisions between electrons begin to affect the vibration energy of the metal atoms themselves, and the molecular groups that were originally firmly "bound" together by the binding energy begin to become active.

Finally, within a time scale of less than 1 picosecond, the energy possessed by the particles breaks through the binding energy that binds them together, just like a wall hit by a catapult, falling off the surface of the material in a series of microscopic "explosions"...

Humans cannot accurately observe this process through any precision equipment, but it does exist.

And, according to the settings of this experiment, it will happen 500,000 times per second.

...

Time passes by minute by minute.

For the people sitting (standing) around the equipment, they can only see the dazzling green light still flashing through the dark glass and the monotonous but rhythmic popping sound to judge that the equipment is still in working condition.

All they can do is wait.

Finally, after two hours as long as two centuries, the working status indicator of the instrument changed from red to yellow again.

This means that the processing process has been completed.

As long as the working fluid is discharged and the equipment is cooled, this round of processing is officially completed.

It was still Zhong Shihong who pulled open the cover covered with dark glass and carefully took the blade out of it with both hands.

It is no exaggeration to say that he did not use such a gentle action when he held his own child for the first time.

"Mr. Chang, look."

There was a tremor in Zhong Shihong's voice.

From the appearance, rows of neatly distributed dustpan-shaped air film holes can be seen on the surface of the blade.

This rather complex channel shape is one of the key factors for the turbofan 10 to achieve "three and a half generations" performance with relatively backward materials.

But at the same time, it is also the "culprit" that has caused its production capacity to be unable to complete the ramp-up.

Of course, the processing effect is something that cannot be seen with the naked eye.

Therefore, after a little appreciation of his masterpiece, Chang Haonan calmed down and ordered:

"Quick, pack the samples into bags and seal them, and send them to the next door for inspection!"

"Yes!"

Zhong Shihong stood at attention, then found the sealing bag as quickly as possible, and then left the test workshop with another technician.

Four years ago, when Chang Haonan improved the drilling process for the turbojet 14, this kind of inspection even required a special flight to Lianhai.

Now, the main building of the Torch Laboratory, less than 100 meters away, already has a fully functional testing center.

It can be said that it is a shotgun for a cannon.

And the results of the huge investment were also shown at this critical moment.

Even before lunch time, the two ran back excitedly.

In addition to the samples brought back, there was also an additional test report in their hands.

"Report to President Chang!"

Zhong Shihong came to Chang Haonan. Perhaps because of running, he was a little out of breath. After taking several deep breaths, he opened the report in his hand:

"According to the detection of a total of 45 air film holes on the surface of the workpiece, the hole diameter, positioning accuracy, and heat-melting layer thickness of all air film holes meet the production requirements. The roughness and curvature of the inner surface of the hole are slightly higher than the requirements, but still better than the optimal result after EDM processing..."

"..."

"Huh--"

After listening to this report, Chang Haonan's hanging heart finally let go:

"Comrades."

There was obviously suppressed excitement in his tone:

"I declare that the first round of the first production test of the ultrashort pulse laser processor was a complete success!"

The moment Chang Haonan's voice fell, cheers resounded throughout the workshop.

Especially on the team of Academician Hou, many people even burst into tears.

If it weren't for the string of safety regulations, I'm afraid some people would jump three feet high--

It is normal that the first trial production does not get a product that fully meets the requirements.

On the one hand, the processing speed, including the processing effect, must still have an optimization range, otherwise there would be no need to bother with trial production, and commercialization would be the end of it.

On the other hand, as long as the parameters that are not easy to modify, such as positioning accuracy and aperture, are fine, the remaining parts, even if some are beyond the allowable range, can still be recovered through subsequent finishing processes.

Achieving this result has exceeded the psychological expectations of everyone present.

Next, as long as the test proceeds step by step, it is only a matter of time to get a relatively optimal set of process parameters.

In other words.

The mass production of WS-10 is coming soon!