Since 1906, the German scientist Wilm discovered the aging phenomenon of aluminum-copper-magnesium alloys, and created a series of aluminum alloys on this basis. The more famous ones are alloy 2015 invented in 1917, 356.0 cast aluminum alloy in 1930, and alloy 2024 in 1933.

The most influential in World War II was the 2024 aluminum alloy. This type of alloy contains magnesium 1.2~1.8%, manganese 0.3~0.9%, silicon 0.5%, zinc 0.25%, chromium 0.1%, tensile strength 476MPa, elongation 10%. According to statistics, 80% of the fuselage skins, wings and other stressed parts of the 140,000 aircraft produced by the United States in World War II were made of this alloy, which can be said to have played an immeasurable role in the victory of the anti-French XS in World War II. Even the 2524T-3 alloy used in China's ARJ21 aircraft was developed from it.

However, when Philip appeared, a series of aluminum alloys with better properties than these aluminum alloys appeared in advance! And brought unexpected changes to the development of the world aviation industry.

Philip came to Bofors again with a few series of aluminum plates, and in the months since he left Bofors, he has been busy with the construction of the Dragon Soul Aircraft Manufacturing Company, and he has not really been there for anything other than attending a few shareholders' meetings and meetings of the Kooshi Defense Weekly. This time, he wants to cooperate with Bofors to jointly produce these aluminum alloys, which can not only be supplied to the Dragon Soul Aircraft Manufacturing Company, but also sold abroad to make a lot of money.

Carl was a little surprised by Philip's arrival! Because since Philip left, the development of the Vulcan cannon has come to a standstill, but the sales of the Gungnir assault rifle are extremely hot! Orders from various countries flew like snowflakes, and although two production lines were expanded, they were still too busy, and the production plans were scheduled until 1933! Because these orders add up to almost 400,000 pieces!

The Swedish military alone procured 50,000 of them, because during the trial period of several months, the performance of the Gungnir assault rifle was so good that it was loved by most soldiers, but the 500 free Gungnir assault rifles were too few, and the generals of various military districts were vying for it. In the end, these guns passed through the hands of many soldiers, and the barrel of each Gungnir assault rifle was scrapped, because the tens of thousands of rounds fired from each gun had exceeded the design life of the Gungnir assault rifle! Under the unanimous demand of the whole army, the Swedish military decided to completely replace the Gungnir assault rifles, and the first batch of troops to be reequipped are elite divisions such as the Royal Guard, because 50,000 Gungnir assault rifles are far from enough, and Bofors cannot make so many at once, and the rifles that were originally equipped also need to continue to be used until they are scrapped.

Due to financial problems, the Chinese side postponed the purchase plan of 300,000 Gungnir assault rifles indefinitely, and the second batch of orders was only 20,000 units, but this is already a large order.

However, the four big countries of the United States, the Soviet Union, Britain, and France, purchased a total of 300,000 pieces at once, of which the United States alone purchased 150,000 pieces. Not to be outdone, the USSR procured 100,000 units. The old empire Britain was also in dire need of this new rifle to train its army, and purchased 30,000 of them. The French were the most stingy, purchasing only 20,000 pieces. There are also small countries that have placed orders in small quantities.

Although some arms companies want to imitate this assault rifle, but without exception have failed, you must know that this assault rifle has very high requirements for materials and manufacturing processes, without mastering these, just through surveying and mapping imitation, the produced gun simply does not meet the requirements.

Carl was so happy that he often woke up laughing when he went to sleep, and if he continued like this, it wouldn't be long before Bofors became one of the top arms dealers in the world.

What surprised him even more was that Philip actually brought another amazing news: Dragon Soul Aircraft Manufacturing Company is ready to jointly develop and produce several series of aluminum alloy materials with Bofors! You must know that Bofors started with metallurgy, and almost all the metals used by Bofors to make guns are self-produced, and Bofors' steel and non-ferrous metals are also sold abroad, which has a good reputation.

In the field of aluminum alloy manufacturing, Germany is a well-deserved king. In 1906, the German scientist Wilm developed an aluminum alloy, which provided aircraft designers with a strong light metal that was more in line with the requirements of aeronautical technology. According to Wilm's theory, the hardness and strength of an aluminum alloy with 4% copper, 0.5% magnesium and 0.5% manganese increased after being placed at room temperature for 4-5 days and nights, but without loss of plasticity. The alloy was eventually trial-produced at the Dylan Metallurgical Plant in Dylan, Germany, and the material was later named "Dura Aluminum" after the city. Compared with the original ordinary pure aluminum, the tensile strength of dura aluminum reaches 36-38 kg/mm², which is 4-5 times that of the original.

Of course, Bofors mainly relies on technology in the field of steel smelting and manufacturing, and is not so strong in aluminum alloy manufacturing. Now listening to Philip say that he wants to jointly develop and produce aluminum alloy with Bofors, Carl shook his head and said: "Philip, I know that your aircraft manufacturing company needs a lot of high-quality aluminum alloy materials, but we Bofors is still blank in aviation aluminum alloy materials, and you also know that we mainly produce cannon steel. ”

Philip suddenly laughed and said, "My friend, what do you look at here?" With that, Philip put down the bag in his hand and took out a few lightweight aluminum alloy plates from it.

As soon as Carl saw these aluminum plates, he understood a little, he was pleasantly surprised to grab an aluminum plate, looked at it repeatedly, and broke it hard, the aluminum plate was as hard as steel, no matter how hard he tried, he couldn't bend the thin aluminum plate in his hand.

Carl looked up and looked at Philip in disbelief: "You made this up?" ”

Philip smiled and nodded, and asked rhetorically, "What, does Mr. Karl still have any questions?" ”

Carl put down the aluminum alloy plate in his hand and said, "Philip, are you sure that these aluminum alloy plates you brought can be manufactured in batches?" I took a look at it, and these plates are very dense in appearance and very high in strength, and they are indeed some good aluminum alloys. However, to produce these aluminum alloy products, the investment is also very high. ”

Philip secretly slandered in his heart, Carl is really an old fox, at this time, when he mentioned the high investment in production, didn't he just want to get more benefits in the cooperation! But I really can't do anything, I can't really find a better partner if I don't cooperate with Bofors, and I am still a shareholder of Bofors, and I have a share of the profits, although it only accounts for one percent, plus Lucas and Anna also have three percent.

Thinking of this, Philip laughed and said, "Mr. Karl, you really deserve to be the most shrewd businessman. In this way, the Dragon Soul Aircraft Manufacturing Company provides the technology and takes only 10% of the profits. Bofors provides the production base and shares 90% of the profits. What do you think? ”

Carney laughed and said, "Okay, I agree!" If the project loses money, Bofors will also bear 90%, but I guess that's almost impossible, right? ”

Philip nodded and said, "Mr. Karl is right! These high-performance aluminum alloys will definitely become the most needed materials for the aviation industry in the future, and I believe that no one will be able to manufacture them in a short period of time. Like our Gungnir assault rifle, I know someone is copying it, but it doesn't work out! ”