A big country of aerospace with black technology

The results of the initial structural test of the combustion chamber were quite in line with Zhang Xingyang's inner expectations.

However, there are still some problems that cannot be ignored.

Zhang Xingyang found Geng Bo, who is currently in charge of structural simulation, and Qiao Yang, who has already started mechanical simulation.

In addition, Su Xiao, who had been helping Zhang Xingyang with material tests before.

Several people simply held a small meeting.

"The shell pressure test of the combustion chamber of the new engine was carried out yesterday, and the results are not bad. Qiao Yang, tell them about the test results."

Everyone is a familiar young man, and Zhang Xingyang has always disliked putting on airs, so he directly discussed technical issues straight to the point.

Qiao Yang directly picked up the test report placed in front of him and started talking.

In fact, everyone present in the lab report has a copy, but professional interpretation of the lab report is still very necessary.

It can let others understand the more important and critical places.

"By observing the macroscopic characteristics of the screw fracture, we found that the fracture is dark gray, the ports are flush, and radial ridges can be seen on the cross section, and the end where the ridges gather is the starting point of the crack.

However, through observation with a high-power microscope, it can be seen that a large number of high-density short and curved tear ridges appear on the screw section, and there are a large number of secondary cracks in it.

Therefore, we judge that the port is the quasi-cleavage fracture.

Metallographic analysis shows that the structure of the fractured screw is mainly lath martensite, and a large number of carbides are precipitated on the phase boundary.

To sum up, it can be seen from the mechanical analysis done by me and the material analysis done by Comrade Su Xiao.

The screw heat treatment process system is unreasonable, the austempering time is short, and the transformation of martensite to bainite is insufficient.

In the process of supplementary tempering, there is a phenomenon of temperature control and overtemperature, and a large amount of carbides are precipitated on the phase boundary, resulting in a decrease in the toughness of the screw material. "

Qiao Yang introduced in detail the process of the experiment and the post-event analysis of the test results.

After Qiao Yang finished speaking, Su Xiao frowned and looked at Zhang Xingyang and said:

"Dean Zhang, it's impossible for us to ask the hardware factory to develop a new screw for us, right? This is simply unrealistic."

Zhang Xingyang nodded and said:

"Indeed, it is simply unrealistic for the factory to open a furnace just for our few screws.

So I plan to use the small processing factory in the research institute to transform it into a processing center dedicated to processing some high-performance parts. "

In recent years, the concept of machining center has been synonymous with relatively high-end products in China.

There is no such thing as later generations, where there are several units in any factory of a certain scale.

Zhang Xingyang looked at the people present, no one jumped out to object, so he continued:

"One more thing, the design of the engine combustion chamber may need to be optimized, after all, the original design is based on carbon-carbon composite fiber material design.

Now it is applied to the shell made of high-strength structural steel, and all design parameters actually have to be recalculated.

Geng Bo and Qiao Yang, I will leave this job to you two. "

Zhang Xingyang assigned the two of them tasks for the next period of time, then turned to Su Xiao and asked:

"Basically, the equipment at Institute 703 is in place, and the next step is to enter the stage of technical training for their workers.

Su Xiao, in terms of the materials of the research institute, there is no one who can afford it except you.

At least you have personally been in contact with the development of the first new material.

So I plan to let you be the leader of the technical guidance group of 703 factory. Do you have any ideas? "

Su Xiao was stunned when he heard Zhang Xingyang's decision.

After all, she is still a student who has just left school, although she has learned a lot from Zhang Xingyang in the past few months.

But let himself be the leader of a technical guidance group, Su Xiao still thinks that he does not have this ability now.

So after struggling for a while, Su Xiao said:

"Dean Zhang, I don't think I'm qualified for such an important task, you should let someone else lead the team."

Zhang Xingyang had long expected that the other party might refuse, and he had already thought of words of persuasion in his heart, and said:

"Besides me, you are the one who knows the most about new materials in the research institute. Do you want me to lead the team?"

Zhang Xingyang's words are harsher, mainly because there are really not many scientific researchers in the academy who can produce materials.

Except for Su Xiao who was present almost the whole time when Zhang Xingyang was preparing the new materials, there were almost no other people in the courtyard who knew the new materials well.

After Su Xiao was severely criticized by Zhang Xingyang, he felt aggrieved and lowered his head in silence.

At this time, Zhang Xingyang also softened his tone, and said softly:

"Su Xiao, don't worry too much. I will also go there for the first two days of technical guidance. I will not leave until your technical training is initially on the right track."

Hearing that Zhang Xingyang, who has always mastered this technology, would accompany him there, Su Xiao felt that his heart, which was originally up and down, calmed down a little.

After taking a few deep breaths, Su Xiao felt his mood stabilized, and then said firmly:

"Dean Zhang, I will definitely do a good job of technical guidance this time!"

Zhang Xingyang smiled and said:

"I believe in you and can do this job well."

"However, I would like to remind you that this cooperation is related to whether the combustion chambers and nozzles of many subsequent rocket engines can meet the performance requirements of the predetermined design, and almost all of them are based on new materials.

I say this not to put too much pressure on you. But almost everyone in our current rocket research institute is carrying the burden of the last rocket accident.

And if we want to get rid of all kinds of hats on our heads, we can only prove it with success.

If you want to be successful, you must do all the work from design to processing to testing. "

Zhang Xingyang looked at everyone present with sincere eyes, and continued to speak:

"I think we've learned enough from the last accident.

We all do not want to see such a tragedy happen. "

Su Xiao and Qiao Yang, who came to the research institute after the accident, did not feel that deeply about this incident.

But Geng Bo, who had experienced it at the time, was greatly touched by this.

Geng Bo also knew in his heart that every time Zhang Xingyang talked about the accident, Zhang Xingyang would definitely feel bad.

After all, his father died in that accident.

Geng Bo stood up and said resolutely:

"Dean Zhang, we must be strict with our requirements, and we will not relax at all, and try our best to ensure that there are no problems in the entire design."

Even Geng Bo, who usually has a good relationship with Zhang Xingyang, did not call him by his nickname - Xingyang at this time.

Instead, calling him his position also represents the seriousness of Geng Bo's words at this time.

"Everyone, we don't have much time left. If we don't succeed this time, I think you all know the consequences."

Zhang Xingyang glanced at everyone present and said seriously.

Everyone understands that there were rumors more than two months ago that the Rocket Research Institute may be disbanded and reorganized.

If it fails again this time, the Rocket Research Institute may really be dismantled and divided into various research units.