For the high-temperature furnace project, Jiuyi Heavy Industry must be engaged.

This project is related to many things, especially the powder metallurgy industry that is gradually emerging, and there must be a large tungsten crucible, the most important for sapphire, which must also be burned at a high temperature of more than 2250 degrees for at least 48 hours before it can be used. Industries such as raw materials for the nuclear industry, electronics industry, and machining tools have a great demand for tungsten and molybdenum products......

In fact, the core of the high-temperature furnace project is the large tungsten dry pot project.

Tungsten is a high-hardness, high-density non-ferrous metal, and China's reserves and output are among the top in the world. In the early twentieth century, the prosperity of the warlords in Guangxi was due to the export of tungsten ore. Even many years after the founding of the People's Republic of China, China did not have the ability to produce tungsten powder on its own, and could only export tungsten ore.

After entering the 21st century, with the accumulation of China's technical research, various tungsten products began to be produced in large quantities and exported to many countries in the world. Among them, the large tungsten crucible used to smelt sapphire and monocrystalline silicon is the most typical representative.

When the material is smelted, a certain percentage of tungsten powder is added to the molten steel to improve the wear resistance of the gun barrel, so as to improve the service life of the gun.

Tungsten has a melting point of more than 3,300 degrees, and it is basically more difficult to make a crucible that can withstand such high temperatures than to ascend to the sky with the existing techniques in the world. Therefore, all kinds of tungsten products can only be processed by powder metallurgy, that is, metal sintering molding.

Vacuum high-temperature furnace is generally used in powder metallurgy, and the maximum temperature can reach 2700 degrees in the furnace, and the large tungsten crucible with a purity greater than 99.95% is used to load parts and products.

China is a big tungsten producer, and in the early part of the 21st century, it has ranked first in the world, far higher than the second United States and the third Russia.

The price of a vacuum sintering high-temperature furnace with a diameter of 800mm in the furnace is more than two million, and the large tungsten crucible inside alone is worth more than one million and two million.

High-temperature furnace. The difficulty of the group lies in the manufacture of the dock crucible.

Yun Fei originally worked in a state-owned enterprise, although he was only at the grassroots level, but he still has a considerable understanding of this industry, and that is because a large part of the products in their workshop are tungsten and molybdenum products.

The production of large tungsten crucibles played a large part in their company before he left the world. When their company was developing the dock crucible project, he and several masters were responsible for tackling the machining project.

The production of Dawu crucible, from tungsten ore to the most finished product, has to go through many processes, and the means to obtain tungsten powder with very high purity are all chemical reactions, and the specific cloud is not very clear. Although their company also did this at that time, because of the relationship between the department and some confidential things, he was not very clear about the process before the powder.

The powder is loaded into a special mold, and then manually compacted (this can not be loaded with tungsten powder by machinery, the current technology, the equipment with a high degree of automation, the performance of the tungsten crucible manufactured cannot be compared with manual at all, the service life is very short, and the powder can not be loaded too much each time. Generally, it is 5 to 10 kilograms), put it into what seems to be 170 megapascals of isostatic pressure in the pressure for more than half an hour, and then use a vertical lathe to turn the shape, which is the powder turning process.

Powder car. It is very critical, because at this time, the workpiece will fall apart if the external force is slightly greater.

After the powder car, the demoulding is carried out. The risk is very high, a large dock crucible with a diameter of 330 mm, and a billet diameter of more than 370 mm (the shrinkage of the product of powder metallurgy is very large). The weight of the powder is more than 400 kilograms, and when the powder is demolded, the crucible powder is slowly taken out by the gravity of the mold core weighing more than 300 kilograms by the radial force axial pull of the rubber sleeve and the steel sleeve on the outside of the powder. If you don't pay attention to it, the powder will break.

The powder truck is then sintered in a high-temperature furnace at a temperature of 2250 degrees.

After the most coward, it is then machined to obtain a large dock crucible.

Machining is also a problem, most of the components of general tools are tungsten, that is to say, tungsten is used to process tungsten, the difficulty can be imagined. Of course, some people say that there are tools that are harder than tungsten, such as diamond blades, cubic boron nitride and the like.

For such an idea, Yun Fei could only smile.

Tungsten is a material that is very resistant to wear and high temperatures. Diamond and cubic boron nitride tools that are almost cut in the grain structure on the surface of the part, and the processing of general materials is a magic weapon at the level of the Heavenly Sword and the Dragon Slayer, but for ultra-difficult materials such as tungsten products, it is estimated that it is equivalent to cutting bones with a bone knife or stone knife in the Stone Age.

For the processing of large tungsten crucibles, domestic knives are still quite good in rough turning. At that time, Yun Fei and they tried a variety of tools, and finally selected YS8 domestic tools, which not only have high cost, good processing efficiency, and the depth of the knife can reach 1-1.5mm on one side, which has high requirements for the technical level of workers.

As for finishing, you can only choose the ultra-fine powder alloy tools produced by the devil or the United States. A small 5mmX5mm, 100mm length knife strip, excluding tax, 400 RMB! This is still a friendly price, and people who don't have access to Japan or the United States can't buy it at all.

There is no such artifact in the domestic market, if it weren't for the fact that Yun Fei's company had a joint venture factory with Japan for tungsten and molybdenum products, they would not be able to compete with other domestic companies in finishing.

For such a difficult project, that investment is not something that Jiuyi Heavy Industry can afford in a short period of time.

But this is related to the third generation of smart phones and some high-end digital products, and the upgrading of chips also has a lot to do with the upgrading of chips.

Otherwise, once the chip company makes all the countries in the world feel the pain, the most important silicon raw material will definitely be cut off by the United States under the control of the Jews.

Stretching his neck out for others to pinch is absolutely unacceptable for Yun Fei now!

However, this matter, no matter how you look at it, cannot be done by a private company. Without the support of the state and the investment of a large number of scientific research departments in the country, let Yun Fei do it himself, such a big injustice. He's never going to do it.

There are many companies that produce tungsten and molybdenum products in China, at least, such as Xiamen Tungsten Industry and China Minmetals, but there are research institutes and manufacturing companies specializing in this aspect of materials.

Unfortunately, they can only study tungsten filaments used to make lighting filaments with low technical content, as well as the production of not advanced mechanical cutting tools, and even molybdenum wires for wire cutting in electrical machining.

Before the 21st century, 100% of China's CNC tools for precision machining were imported!

"Old Sun. I know what you mean. However, this project, we Jiuyi Heavy Industry, a private enterprise, simply can't afford it! We don't have dedicated materials researchers, we don't have dedicated materials research labs. The cold laboratory in the smelting workshop alone cannot support the research of nanoscale cubic boron nitride and its related supporting projects. ”

In order to continue to let the two old guys work hard for Jiuyi Heavy Industry, Yun Fei had to explain in detail.

"Xiaoyun, when we proposed this project, we didn't mean that we wanted Jiuyi Heavy Industry to bear the research funds for this project. As long as we set up the project and start the project in advance, and make certain progress, we can apply for project funds from the state ......." Although Yun Fei said that his face was gloomy, Situ Heyun still didn't want to give up.

He himself knew that it was too unfair for Yun Fei to let Jiuyi Heavy Industry, which was already short of funds, bear the initial research funds for this project.

Wait until there is a certain result later. The state will certainly be fully accepted, and it will be possible to dominate the research work, at that time. Unless Jiuyi Heavy Industry is fully responsible for all the research funds, it is impossible to exclusively own that technology.

Judging from his understanding of Yun Fei in the past few years, this young man seems to have an incredible and even fanatical attachment to exclusive ownership!

"Project initiation? Yun Lao, are you absolutely reliable in this matter? How many professionals can we count in our company? Could it be that just these people in our company can produce materials that the whole country has not produced? For Situ Heyun's ignorance, Yun Fei was really angry.

I'm not afraid of offending this old guy now.

Take my personal money and do things for the country, I am so selfless?

No!

I'm just a little citizen!

"I think you're in automatic control, right? You are a champion in terms of electronic circuits, but are you also in terms of materials? It is not easy for Jiuyi Heavy Industry to make money, and now there are several projects in the laboratory waiting for funds to start building factories! The more Yun Fei said, the more polite he became, at this moment, he still forgot that Situ Heyun, an academician who enjoys special national allowances, only volunteered to help Jiuyi Heavy Industry develop CNC machine tool technology.

"You ......" Situ Heyun was so angry by Yun Fei's words that he couldn't speak.

"Mr. Situ, you're fine, are you?" Seeing Situ Heyun holding his chest and unable to speak, Mao Yadong, who was sitting not far from the door to record the content of the meeting, hurriedly stepped forward to help the old man stroke his chest, and kept giving Yun Fei a look.

However, Yun Fei, who was about to continue, didn't see her hint, and when Yun Fei saw that the old man was angry, he was instantly stunned.

In case the old man gets angry, not only is it difficult for the company to explain, but Yun Fei is also difficult to explain.

"Lao Wu, why are you stunned, call the aerospace hospital and call an ambulance!" Yun Fei was stunned for only a second, and then went crazy.

Shouldn't it make the old man's heart attack angry!

If that's the case, you'll die!

The most important thing is that after the old guy braids, who will lead his CNC machine tool research team? (To be continued......)

PS: This chapter is late again, and the gourd is dead! Despise the company's network, which has not recovered for two days.

Thank you for the 10,100 coins of the Demon Dragon War Ghost again.,Thank you for the gentle pain big reward.。

Thank you Feng Zhimeng 2123, Demon Dragon Battle Ghost, and Liu Liu Tianxia for several big monthly passes. The next chapter is already halfway through, and it is expected to come out around eight o'clock, so please forgive me!