The simple way to increase the power of an aero engine is to increase the temperature of the gas that drives the turbine, but in this way, neither the combustion chamber nor the turbine blades can withstand the high temperature, and the result is either burned or blown up entirely.

The gas turbine power unit made by the Jet Power Office of the Tengfei Factory is currently stuck here, although Qian Qiang, Yan Tiancheng and others have copied it bit by bit according to Hamilton's T-62T gas turbine power unit.

Even if the size of each part is exactly the same as the original sample, even then once the imitation is on the test bench, the longest will not last more than 40 hours.

And the original T-62T gas turbine power unit can easily rotate for three or four hundred hours.

The reason why the gap is so huge, without him, is only because the level of metallurgical fields between the two countries is too different, no way, the United States is also a superpower, the world's first industrial country, because of this, the United States in the field of basic metallurgy can be described as unique in the world.

If nothing else, let's just say that the most basic aviation aluminum alloy, the United States can be lighter, more leathery, but it is difficult to do this in China, in the final analysis, the basic industry of metallurgy is inferior to others.

As for the metallurgical process of metal materials on the aero engine, it is even worse than that of the United States, take the T-62T gas turbine power unit imitated by the Tengfei Plant as an example, the Hamilton Company began to develop it in the 50s, and completed the finalization in the 60s, which has a history of more than 20 years.

However, the powder metal metallurgy process was already used at that time, which made the engine parts more heat-resistant and the service life was doubled.

On the other hand, in China, powder metal metallurgy is not nothing, but the application range is not extensive, but it is only in some engine improvement or new machine trial production to do some local applications, not that I do not want to use it on a large scale.

The main reason is that the domestic powder metal process is too rough to carry out large-scale industrial production, so it can only concentrate limited resources on a few cutting-edge projects that are urgently needed in China.

This has led to many aero-engine factories have been using the old technology and old technology provided by the Soviet Union in the fifties and sixties, Yonghong plant is the most typical example, the equipment in the factory has not changed for decades, and the technical department of the factory has not studied the new process, but it is a pity that the equipment in the factory can not complete the requirements of the new process, and can only stay on paper.

Tengfei plant is the same, even in some aspects is not as good as Yonghong factory, after all, Yonghong factory also has a set of special equipment for aero engine production, Tengfei plant gas turbine device is still each workshop equipment for processing.

As for the materials, the first-class materials with low output are not enough for several key trial models, and naturally they cannot be given to the Tengfei factory, so they can only use some mainstream aero engine alloy materials in China at this stage.

In this way, the gap in quality between the two has been opened at once, coupled with the lack of experience and processing of the Tengfei factory, it is not enough to fail the test run repeatedly.

Fortunately, it is not only the material that solves the problem of heat resistance of aero engine components, but also high-quality cooling technology.

This is just like our army in the war years, the equipment is insufficient, just give full play to the tactical advantage, the Tengfei factory is not as good as the original American in terms of basic alloy materials, then work hard in other aspects, as long as the problem can be solved, it does not matter what path.

It is a pity that whether it is Tengfei Factory or China, this year in the air film cooling technology is in the research and exploration stage, a little better can also do an aero engine casing air film cooling, the engine's annular combustion chamber and afterburner gas film cooling can be reluctantly made, but the quality is not very stable.

As for the most critical air film cooling technology for turbine blades, there are a lot of theoretical articles, but I haven't heard of anyone actually making it.

The reason why this is so is not a matter of materials, but that such advanced manufacturing requirements cannot be met in the processing and manufacturing process.

In fact, as early as the 70s, China has begun the research of air film cooling technology, and the relevant calculation and engineering methods have long formed a system.

Don't look at just punching a few small holes in the part, but these small holes are very particular, not only the edge finish of the hole is extremely high, but the hole can not only not form a high-temperature coating around the hole when molding, but also can not have cracks around.

There is no way, the aero engine is a very delicate thing, and the slightest error may make the engine scrapped, so these small holes that form the cooling of the air mold look inconspicuous, but they are important, and an accidental, expensive aero engine may be gone.

The problem is that if these three requirements are brought out separately, a factory with a good foundation can still cope with it, but if the three are superimposed, no one in the country can complete it several times.

In fact, not only domestic, but also looking at the world, there are no more than five fingers of enterprises that can do a good job of these three conditions at the same time, otherwise how can the threshold of aero engines be so high, and a small hole in a turbine blade alone can turn away a bunch of enterprises and even countries.

Zhuang Jianye wanted to ignite the turbine power device, but the basic materials were not good, so he turned to tackling key cooling technologies, Qian Qiang and others had such a solid theory, and naturally knew the importance of air film cooling.

Of course, it is the whole country to find a capable unit to see if it can make such a hole, but as a result, I ran a lot of places, and also tried a lot of equipment, either the high-temperature coating around the hole is too thick, or the finish is not enough, resulting in the gas turbine power unit often turbine blades broken and stopped.

Tengfei factory is not without thinking of buying advanced porosity processing equipment from abroad, the problem is that this kind of equipment is the same as multi-impeller shot blasting machine, no matter how much money you give, people will not sell you, because this thing is really a strategic resource, subject to control.

Because of this, the ignition turbine power unit of the Tengfei plant almost came to a standstill, and the two mountains of materials and manufacturing could not be solved, and the whole project could only crawl at a turtle speed.

Just when Zhuang Jianye was at a loss, the messy information collected by Company H from Japan actually allowed Zhuang Jianye to find hope for breaking the situation in adversity.

Because after the explanation of the theory of the large pile of gas film cooling, the Japanese experts with a very professional spirit put forward a very feasible hypothesis, that is, the use of hollow titanium tube electrode, the surface is wrapped with insulating resin, the top is exposed metal, and there is a negative voltage of 8 to 12V between the workpiece and the electrode.

When the strong acid electrolyte flows from the titanium electrode tube, the positive and negative electrodes fuse to form a magical ionization phenomenon, which can instantly form small process holes on the workpiece.

Because the electrochemical reaction principle is adopted, and there is no thermally integrated forced perforation, the finish of the process hole is very well controlled, and there is no coating and cracks.

Seeing this, Zhuang Jianye can be said to be smiling, isn't this the core equipment of the turbine blade air film cooling hole, electrochemical perforation equipment, ECM device, really what do you want.