Chapter 1288 Materials

Take the planetary vector engine currently under development by Jiuzhou Technology as an example. Its thrust mainly comes from the high-temperature gas ejected after the external air is inhaled and mixed with aviation kerosene for combustion.

The air inlet is the cold end component. Because the working environment is not harsh, it uses a special titanium alloy that has been successfully developed by the Titanium Star Department for a long time. It is light in weight and high in hardness.

The hot end components that need to perform high-pressure and high-heat work on the airflow to generate thrust require a lot of ultra-high temperature alloys, and not only a large amount of alloys are required, but also a large variety of types.

The four major hot end components in the aircraft engine, the combustion chamber, the guide, the turbine blades and the turbine disc all require alloys with different phases that can withstand ultra-high temperatures. In addition, the alloys used in weapons and equipment, afterburners and vector engine tail nozzles also require different types of ultra-high temperature resistant alloys.

For the high-temperature alloys of the parts of the planetary aircraft engine, Gu Qing is the main opinion controller of the data review team, because only he knows what "things" he wants to make.

The turbine speed of large and medium-sized turbofan engines must reach above 1, which will cause the temperature before the turbine to reach above 2100℃.

In the planetary aero-engines designed by the design department, the amount of ultra-high temperature alloys accounts for more than 50% to 70% of the total weight of the engine.

The demand is large and the demand categories are diverse, but Gu Qing can't really be an omniscient god and directly provide formulas and processes to these research groups.

After all, this thing is impossible to explain clearly.

Several research groups in the laboratory are leaders in the industry. Although they can't say that they understand all the top international processes, everyone has a rough idea in their hearts.

If they can see these "weird" advanced processes as soon as they come to Jiuzhou Technology, they will doubt whether Jiuzhou Technology has a group of Nobel Prize winners working for it.

After watching Professor Zhang leave, Gu Qing started a new round of disinfection and inspection before entering the laboratory.

The young man who was criticizing Professor Zhang not long ago saw Gu Qing wearing a special numbered lab coat and his expression immediately became much more humble.

When I just checked Professor Zhang's recent situation, the young man appeared very frequently in the picture displayed by the SR1 glasses, and almost every time he appeared recently, it was a "highlight moment".

Although Gu Qing did not instruct him to be strict with the young man, it was the personnel transfer order signed by Gu Qing himself to put such a person who could not tolerate any sand in his eyes in the position of the head of the research room.

The young man's name is Sun Ke. He is 36 years old this year. He was once a talent with special admission to a certain university. Later, he went to the United States for further studies. When he was about to complete his studies, he happened to encounter the semiconductor industry crisis in Daxia at that time. He resolutely gave up the high-paying recruitment, hastily finished his studies, and returned to China to start his struggle.

From starting a business to bankruptcy, working in several large companies, and then being recruited by Jiuzhou Technology, Sun Ke has always been engaged in material-related projects and has accumulated much deeper industry knowledge than talents from ordinary colleges and universities.

Of course, what Gu Qing values ​​is not his knowledge, but his responsible attitude.

After bankruptcy, the company's assets were sold at a low price, but the assets were still insolvent. He dared to bear the debt himself, and was unwilling to choose the path of company bankruptcy and personal safety, which was more than many people.

"How is it? Our company has several major project acceptance tasks this year. If there are any problems, they must be reported in time so that the company can mobilize resources in time to overcome the problems with all its strength."

Sun Ke heard Gu Qing's question and did not choose to shake out the "useless" professor just now. Instead, he nodded and said: "At present, our laboratory does need to add some more professional talents. The main reason is that our design is relatively advanced, and the aircraft engines used in the planet use standards comparable to vacuum environments.

For example, the requirements for turbine blades and guide blades are higher than conventional requirements. Since the cross-section of the blades is very thin, the smaller the cross-section size, the lower the creep rupture strength, but it is easy to form cracks.

So now the limitation of this project is the research and development and use of single and double crystal materials. After all, to avoid patents, re-development is necessary.

There are also several turbine engine design projects. The guide blades, one of the parts with the greatest thermal shock on these turbine engines, are also a research and development problem.

If the material does not improve, our overall project will stagnate."

At this point, Sun Ke paused and chose to keep silent about this project.

After all, this is the [Vector Nozzle Material and Cooling R&D Laboratory], not the company's material R&D headquarters, and some information cannot be leaked here.

Seeing that the young man was so tight-lipped, Gu Qing shook his head and snapped his fingers. After waiting for a few seconds, he saw Xuanwu reminding the display area of ​​the SR1 glasses that the information barrier was successfully established, and then he said, "Now we can talk about other projects here.

I think the degree of integration between your material R&D and actual operation is still not enough. Although there is so-called data support and even work on the front line, it is all in the past.

Material with high strength and excellent thermal fatigue performance, and high oxidation resistance and corrosion resistance, you should keep going from the project of casting high-temperature alloys. After all, this is an important project that has been proven to be successful. It is not shameful to follow the same path as others. As long as this path is in the right direction, we can go faster and more steadily than others.

In the think tank's investigation, Howmet and material companies in the United States basically use IN718C, Rene220 and R55 alloys as guide vane materials, and these alloys are the results of the high-temperature alloy casting project.

In addition, the manufacturing of the rear grate ring of the turbine guide of our Taihang FWS10 engine in Daxia also uses oxide dispersion strengthened high-temperature alloys.

In addition to the blades, when you developed the materials for the turbine disk of one of our turbine engines, although you have considered the special situation that the turbine disk is heated unevenly during operation, the rim of the disk is subjected to higher temperatures than the center, and a large thermal stress is generated.

However, you did not go deeper into the force detection more carefully. The tenon part of the turbine disk bears the greatest centrifugal force, and the stress it is subjected to is extremely complex.

Therefore, the alloy requirements of this component must have extremely high yield strength and creep strength, as well as good cold and hot and mechanical fatigue resistance.

Not to mention the linear expansion coefficient, it must be small enough, the low-cycle fatigue performance must be high, and the notch sensitivity needs to be reduced again and again, and strive for no notch sensitivity. ”

Speaking of this, Gu Qing once again emphasized: "Use the Spiritual Realm Ecological Laboratory more often. If there are results in reality, you should also use the Spiritual Realm Laboratory to replicate them again, so that the server data can continue to improve. "