Take Off My Aviation Era

It is no wonder that Lin Guanghua was so excited. Since the second half of 1991, Ascendas Group has been searching for this rare metal deposit called rhenium in China.

Three years have passed, except for a few derivative mines, no trace of rhenium has been found at all.

There is no way. Ascendas Group can only import from abroad. The problem is that this kind of rare metal with global annual output is no more than 500 tons, and the price is so high that gold is beyond the dust. Ascendas Group has spent a lot of effort to drop 150,000 US dollars. Only 20 kilograms of rhenium was purchased in South America.

The reason why Ascendas Group loves this rare metal, even if it is purchased in kilogram quantities, is for no other reason, because rhenium is a key factor in the success or failure of the second-generation 6 MW core machine of Ascendas Group.

Because rhenium, as a high temperature resistant metal, in addition to the characteristics of high density, high melting point, and high strength, these common high temperature resistant metals have, more importantly, this rare metal has strong oxidation resistance and minimal change at any temperature.

This may not be specific enough. Let’s take an American test example. During the development of the high-power engine of the Delta Heavy Rocket, Lockheed Martin made the rocket engine's tail nozzle with rhenium-containing alloy metal. The temperature can reach 2200 degrees Celsius.

In the thermal cycle test where the room temperature is rapidly increased to 2200 degrees Celsius, the conventional superalloy requires the exhaust nozzle to be scrapped after repeated several times.

However, high-temperature alloys containing rhenium can withstand the thermal fatigue of the fifth power cycle of 10 without failure in similar tests.

Draw an important point, not 10 times, but 10 to the fifth power.

This shows that rhenium's high temperature resistance, continuous stability, and its own strength and tolerance are so strong, and because of this, this kind of rare metal is regarded by the Americans as an important strategic material, from refining methods to smelting The refinement until the final alloy ratio is completely confidential. As for the export of technology transfer products, it is hard to even think about it.

Therefore, there has been no research on rare metals such as rhenium in China for many years, so that many people do not know exactly what they can do except for knowing that there is such a thing in the periodic table.

It was not until the disintegration of the Soviet Union that some Soviet experts were hired domestically, and the aviation industry did not know that there was something called rhenium, which was added to superalloys such as nickel-based alloys, which would increase the thermal endurance temperature of such superalloys by 300 to 500 degrees Celsius and the strength And life will be doubled.

This has attracted domestic attention.

It’s just that attention is paid to attention, but the action is a little slow. This is not because the relevant domestic institutions have slackened. The main reason is that the Soviets have not done much research in this area. Just a little bit, the Soviet Union disintegrated with a splash, so that a lot of smelting. The whole development process was interrupted due to the decline and fall of the country.

It is equivalent to saying that the country has received an unfinished project, and there is still a long way to go before the high-temperature alloy containing metal rhenium can be boiled out.

If that’s the case, at least it’s not starting from scratch. It saves a lot of effort. If you are willing to spend money, it will not be difficult to get it out. The problem is that there is a hurdle that cannot be circumvented.

And this hurdle is nothing else, that is, there are no rhenium deposits available for mining in the country.

To be more precise, the domestic precision smelting technology is not good enough to extract metal rhenium from the derived rhenium ore, and there is no aggregation of associated rhenium ore, which puts the domestic aviation industry into an embarrassing situation where it is difficult for a clever woman to cook without rice. .

If this is not the case, it is impossible for Ascendas Group to pay a high price of US$150,000 for 20 kg of rhenium.

However, the money spent by Ascendas Group is worth it, because after more than a year of research and testing by Ascendas Aerospace Materials Research Institute, the nickel-based alloy applied to the 6 MW core plus 9.7% rhenium is the highest The temperature has increased from 1020 degrees Celsius to 1382 degrees Celsius. If combined with composite high temperature treatment technologies such as film cooling technology and heat-resistant ceramic coating technology, the high temperature resistance temperature will be further increased to 1547 degrees Celsius.

This is not the most critical. Ascendas Group is preparing to apply the aluminum-titanium alloy to the third generation 15 MW core machine and the fourth generation 27 MW core machine. Because the addition of metal rhenium finally broke through the technical bottleneck for many years, Substantial progress has been made.

According to the latest experimental results of the Institute of Aeronautical Materials, the aluminum-titanium alloy with 16.7% metal rhenium has not only increased its strength by 320%, but its heat-resistant temperature has also increased from 1,100 degrees Celsius in the past to 1,563 degrees Celsius, and its service life is now even greater. 2.6 times that of commonly used nickel-based alloys.

In addition, the weight is lighter and the efficiency is higher. That is to say, the fuel economy of aero engines using aluminum-titanium alloy in the future will be higher.

Such a good thing Ascendas Group would like to immediately use it on its own aircraft engines.

However, the smelting process of this fusion rhenium metal is very high, and the laboratory is okay, but the industrialization is far from reaching the mature requirements, not to mention the 6.7% addition amount is really large, and the cost is not worthwhile.

Of course, the most important thing is that the domestic rhenium metal ore cannot meet the demand for large-scale production. Therefore, Ascendas Group has been putting rhenium-containing heat-resistant alloys in the laboratory for various forward-looking experimental studies. There is no urgency. Put into production.

This also allowed Lin Guanghua to pick up the 5000 km extended range version of the TRJ-500. The TRJ-500NB could not land for a long time. There was no way. The turbofan engine with a thrust of 6.5 could not be taken out. TRJ-500NB could only be eaten on the drawing. Gray.

Now it's fine to use the ten-year lease of two TRJ-500s and eight of the same model in exchange for the associated rhenium ore that is easy to smelt. Lin Guanghua only feels that this transaction is too worthwhile.

Not to mention that, even if it quadrupled, Lin Guanghua felt that he had made a lot of money.

It should be known that as long as the rhenium in this mine is controlled by the Ascendas Group, within two years, the second-generation nickel-based superalloy, which has been studied by the Institute of Aeronautical Materials for several years, will be mass-produced, and then the second-generation 6 MW core machine will be launched. , The 6.5-ton thrust turbofan engine can be put into production immediately in Cotton’s Aero Power Plant.

With the engine, let alone the 5,000-km TRJ-500NB, the 10,000-km TRJ-500ZB is a pediatric thing, because the second-generation core machine landed, 6.5 tons of thrust is only for pediatrics, 7.5 tons or even 8.5 tons of large ducts The turbofan engine comes off the production line of the Aviation Power Plant just like the dumpling.

At that time, TRJ-500NB and TRJ-500ZB can only be regarded as a younger brother~www.readwn.com~ To the 120-seater TRJ-700, TRJ-900 is the masterpiece of the Ascendas Group!

The metal element that is important to Ascendas Group almost determines its destiny and future, just like this, how Lin Guanghua is not heartbeat, and how not excited!

But Lin Guanghua’s unconcealed excitement fell in the eyes of outsiders with a look of envy. They did not know the content of the agreement, let alone the rhenium mine involved, but they saw the representatives of six countries. The consulate staff member Zhongxing Pengyue usually stuffed Lin Guanghua with the contract in his hand, and his positive appearance was the same as when fans saw a star, he almost went crazy on the spot.

But this is not the point. What really shocked outsiders is the number of purchases in these countries. The total amount and lease reached 118.

The total amount reached a staggering 5 billion US dollars.

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