The results of the initial structural test of the combustion chamber were relatively in line with Zhang Xingyang's inner expectations.
However, some problems have been exposed that cannot be ignored.
Zhang Xingyang found Geng Bo, who was currently responsible for structural simulation, and Qiao Yang, who had already started mechanical simulation.
Plus Su Xiao, who had been helping Zhang Xingyang conduct material experiments.
A few people held a brief meeting.
"Yesterday, we conducted a casing pressure test on the combustion chamber of the new engine. The results were pretty good. Qiao Yang, please tell them about the test results."
We were all relatively familiar young people, and Zhang Xingyang never liked to put on airs, so he went straight to the point to discuss technical issues.
Qiao Yang directly picked up the test report placed in front of him and started talking.
In fact, everyone present has a copy of the lab report, but professional interpretation of the lab report is still very necessary.
It allows others to understand the more important and critical aspects.
"By observing the macroscopic characteristics of screw fractures, we found that the fracture surface was dark gray, the ports were flush, and radioactive ridges were visible on the section. The end where the ridges gathered was the starting point of the crack.
Through high-power microscope observation, it can be seen that there are a large number of high-density short and curved tearing ridges on the cross section of the screw, and there are a large number of secondary cracks in them.
Therefore, we judge that the port is a quasi-cleavage fracture.
Metallographic analysis shows that the structure of the fractured screw is dominated by lath-like martensite, and a large amount of carbides precipitate at 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 isothermal quenching time is short, and the transformation of martensite to downward bainite is insufficient.
During the supplementary tempering process, there is a phenomenon of temperature control and over-temperature, and a large amount of carbides are precipitated on the phase boundary, resulting in a reduction in the toughness of the screw material. "
Qiao Yang introduced in detail the process of the experiment and the post-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 special furnace just for our few screws.
So I plan to use the small processing plant within the institute and transform it into a machining center specially used to process some high-performance parts. "
In recent years, the concept of machining center has been synonymous with relatively high-end products in China.
It's not like in later generations, where just a few factories of some size can have a few units.
Zhang Xingyang looked at everyone 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 initial design plan was based on carbon-carbon composite fiber materials.
Now when applied to shells made of high-strength structural steel, all design parameters actually have to be recalculated.
Geng Bo and Qiao Yang, this work will be left to you two. "
Zhang Xingyang assigned the two of them tasks for the next period of time, then turned to Su Xiao and asked:
“The equipment at the 703 Institute is basically in place, and the next step is to enter the stage of technical training for their workers.
Su Xiao, in terms of research institute materials, there is no one else who can afford it except you.
At least you have personally come into contact with the development of the first new material.
So I plan to let you serve as the leader of the technical guidance group of Factory 703. Do you have any ideas? "
When Su Xiao heard Zhang Xingyang's decision, she was stunned.
After all, she was still a student who had just stepped out of school, although she had learned a lot from following Zhang Xingyang in the past few months.
But if she is asked to serve as the leader of a technical guidance group, Su Xiao still thinks that she does not have this ability now.
So after struggling for a while, Lidya Su said:
"Dean Zhang, I feel that I am still not 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 mind, and said:
"Besides me, the person in the institute who knows the most about new materials is You. Do you want me to lead the team?"
Zhang Xingyang's words were harsh, mainly because there really weren't many scientific researchers in the hospital who could produce useful materials.
Except for Su Xiao, who was present almost all the time when Zhang Xingyang was preparing the new materials, there were almost no other people in the hospital who knew much about the new materials.
After Su Xiao was severely criticized by Zhang Xingyang, she felt a little aggrieved and lowered her 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 be there for the first two days of technical guidance. I will not leave until your technical training is initially on track."
Hearing that Zhang Xingyang, who had always mastered this technology, would accompany him, Su Xiao felt that her originally uneasy heart had calmed down a little.
After taking a few deep breaths, Lidya Su felt that her mood had calmed down, and then she said firmly:
"Dean Zhang, I will definitely do a good job in providing technical guidance this time!"
Zhang Xingyang smiled and said:
"I believe you can do a good job this time."
"But 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. Almost all of them are based on new materials.
I don't mean to put too much pressure on you by saying this. But almost all of us at the Rocketry Research Institute currently carry the baggage of the last rocket accident.
And if we want to get rid of the various labels placed on our heads, we can only use success to prove it.
If you want to succeed, you must do all the work from design to processing to testing. "
Zhang Xingyang looked at everyone present with sincere eyes and continued to preach:
"I think we have learned enough lessons from the last accident.
No one wants to see such a tragedy happen. "
Su Xiao and Qiao Yang, who only came to the institute after the accident, did not feel that deeply about this matter.
But Geng Bo, who had experienced it at that time, was greatly touched by it.
Geng Bo also knew in his heart that every time Zhang Xingyang talked about the accident, Zhang Xingyang would definitely not feel better.
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 not relax even a little bit, so as 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, he was addressed by his position, which also represented the seriousness of Geng Bo's words at this time.
"Everyone, we don't have much time left. If we can't succeed this time, I think you all know the consequences."
Zhang Xingyang glanced at everyone present and said seriously.
Everyone knows that there were rumors more than two months ago that the Rocket Research Institute might be disbanded and reorganized.
If it fails again this time, the Rocket Research Institute may really be dismantled and divided into various research units.
