Technology: breaking the hegemony that monopolizes the world

Take the planetary vector engine currently being developed by Kyushu Science and Technology as an example, its thrust mainly comes from the high-temperature gas ejected after the air inhaled from the outside is mixed with aviation kerosene and burned.

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

However, the hot-end parts 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 the amount of alloys required, but also the types of alloys required.

The four hot-end parts in the aero-engine, the combustion chamber, the guide, the turbine blade and the turbine disk all need alloys with different phase properties and high temperature resistance. In addition, they are also used in weapon equipment, afterburner and vector Alloys on components such as engine tail nozzles also require a different type of superalloy.

Gu Qing is the main opinion controller of the data review team for the high-temperature alloys of aero-engine parts in the planet, because only he knows what "thing" he wants to make.

The turbine speed of large and medium-sized turbofan engines should reach above 19000r/min, which will cause the temperature before the turbine to reach above 2100°C.

In the intraplanetary aeroengine designed by the design department, the amount of ultra-high temperature resistant alloy accounts for more than 50% to 70% of the total weight of the engine.

The demand is huge and there are many types of needs, but it is impossible for Gu Qing to be an all-knowing and omnipotent god to directly provide formulas and crafts to these research teams.

After all, this thing is impossible to explain clearly.

Several teams in the research room are industry leaders. Although it cannot be said that they understand all the top international craftsmanship, everyone knows it well.

If they can see these "weird" advanced technologies as soon as they come to Kyushu Technology, they will wonder whether Kyushu Technology has a group of Nobel Prize winners working.

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

Not long ago, the young man who was still criticizing Professor Zhang saw Gu Qing wearing a special numbered lab coat, and his expression immediately humbled a lot.

When I just checked Professor Zhang's recent situation, in the screen displayed by SR1 glasses, this young man has a very high appearance rate, and almost every appearance recently is a "highlight moment".

Although Gu Qing was not instigated by this young man's harshness, it was a personnel transfer order signed by Gu Qing himself to put this kind of person who can't put sand in his eyes in the post of head of the research laboratory.

The young man's name is Sun Ke. He is thirty-six this year. He used to be a special-education talent admitted by a certain university. Later, he went to the United States for further studies. When he was about to finish his studies, he happened to encounter the crisis in the semiconductor industry in Daxia at that time, and he resolutely gave up recruiting high salaries. , hastily finished his studies, and returned to China to start his struggle.

From starting a business to going bankrupt, going to "part-time jobs" in several large companies, and then being recruited by Kyushu Technology, Sun Ke has always been engaged in material-related projects, and has accumulated much deeper industrial knowledge than ordinary college talents.

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

After bankruptcy, selling the company's assets at a low price and being insolvent, and daring to carry the debts on your own, rather than choosing the path of company bankruptcy and personal safety, has surpassed many people.

"How is it? Our company has several major project acceptance tasks this year. If there is any problem, it must be reported in time, so that the company can mobilize resources in time to solve the problem."

Hearing Gu Qing's question, Sun Ke didn't choose to shake off the "useless" professor just now, but nodded and said: "At present, our laboratory really needs to add some professional counterparts, mainly Or our design is relatively advanced, but the aircraft engine used in the planet uses a standard comparable to a vacuum environment.

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

Therefore, the limitation of this project is the research and development and use of single and double crystal materials. After all, if we want to avoid patents, we must re-develop them.

There are also several turbine engine design projects where guide vanes, one of the most thermally impacted parts on these turbine engines, are also a development challenge.

Without progress in materials, our overall project would come to a standstill. "

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

After all, this is the [Vector Nozzle Material and Cooling R\u0026D Laboratory], not the company's material R\u0026D 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, waited for a few seconds, and saw Xuanwu reminding him that the information barrier was successfully established in the display area of ​​the SR1 glasses, before he said: "Now we can talk about other projects here.

I think that the degree of integration between your material research and development and actual operation is still not enough. Although there are so-called data support, and you have even worked on the front line, that is all in the past.

For materials with high strength and excellent thermal fatigue performance, as well as high resistance to oxidation and corrosion, you should start with the project of casting high-temperature alloys. After all, this is an important project that has been proven to be successful, just like others. There is no shame in the road we follow, as long as the road is in the right direction, we can walk faster and more steadily than others.

In the investigation of the think tank, the American Howmet Company and the material company basically use IN718C, Rene220 and R55 alloys as the materials of the guide vanes, and these alloys are the results of the project of casting superalloys.

In addition, the manufacture of the rear grate ring of the turbine guider of our Taihang FWS10 engine in Daxia is also made of oxide dispersion-strengthened superalloy.

In addition to the blades, the turbine disk, one of our turbine engines, when you developed materials, although you have considered the uneven heating of the turbine disk during work, the rim of the disk bears a higher temperature than the center, resulting in a large This particular case of thermal stress.

But you didn't go into the force test more carefully. The tenon tooth part of the turbine disc bears the largest centrifugal force, and the stress it receives is extremely complicated.

Therefore, the alloy requirements of this part must have extremely high yield strength and creep strength, as well as good cold and heat resistance 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, striving for no notch sensitivity. "

Speaking of this, Gu Qing once again emphasized: "Use the spiritual environment ecological laboratory more often. If there are results in reality, you should use the spiritual environment laboratory to reproduce it again, so that the data of the server can continue to improve."