Intelligent Industrial Empire

The high-temperature furnace project must be undertaken by Jiuyi Heavy Industry.

This project is related to many things, especially the powder metallurgy industry that is gradually emerging. The most important large tungsten crucible for sapphire smelting must also be burned at a high temperature of over 2250° for at least 48 hours before it can be used.There is a great demand for tungsten and molybdenum products in industries such as nuclear industry, electronic industry raw materials and machining tools...

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 production are ranked in the forefront of the world.In the early twentieth century, the prosperity of Guangxi warlords was due to the export of tungsten ore.Even many years after the founding of the People’s Republic of China, China was unable to produce tungsten powder by itself and could only export tungsten ore.

This thing was used in the military for a long time before, and civilian use is the main ingredient in the production of metal cutting tools. After entering the 21st century, with the accumulation of Chinese technology research, various tungsten products began Mass production and export to many countries in the world.Among them, the large tungsten crucible used to refine sapphire and single crystal silicon is the most typical representative.

The gun barrel adds a certain percentage of tungsten powder to the molten steel when the material is smelted to improve the abrasion resistance of the gun barrel, thereby increasing the service life of the gun.

The melting point of tungsten exceeds 3300 degrees. To make a crucible that can withstand such a high temperature, with the world's existing technology, it is basically more difficult than climbing.Therefore, powder metallurgy, namely metal sintering, can only be used to process various tungsten products.

Vacuum high-temperature furnaces are generally used in powder metallurgy, the highest temperature can reach 2700 degrees in the furnace temperature, and the large tungsten crucible with a purity greater than 99.95% is used for loading parts.

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

A vacuum sintering high-temperature furnace with an inner diameter of 800 mm costs more than two million, and the large tungsten crucible inside is worth more than 1.2 million.

For high-temperature furnaces, the most difficult part of the group lies in the manufacture of the Dawu crucible.

Yunfei originally worked in a state-owned enterprise. Although it was only at the grassroots level, he still has a good understanding of the industry. That is because a large part of the products in their workshops are tungsten and molybdenum products.

The production of the large tungsten crucible occupied a large proportion in their company before he left that world.When his company was developing the Dawu crucible project, he and several masters were in charge of the machining project.

The production of Dawu crucible requires many processes from tungsten ore to the final product. The means to obtain very high-purity tungsten powder are all chemical reactions. What Yunfei knows is not very clear, although their company did this at the time. Yes, but because of departmental relations and some confidentiality, he is not very clear about the process before the powder.

The powder is put into a special mold, and then manually tamped (this is impossible to use machinery, the current technology, the equipment with a high degree of automation is loaded with tungsten powder, the performance of the manufactured tungsten crucible can not be compared with the manual, the service life is very short , You can’t load too much powder each time, usually five to ten kilograms), put it in an isostatic pressure of 170 MPa, and keep the pressure for more than half an hour, and then use a vertical lathe. Shape, this is the powder car process.

The powder truck is very critical, because at this time the workpiece will fall apart if it receives a little bit of external force.

After the powder truck, the risk of demolding is very high. A large dock crucible with a diameter of 330mm, the diameter of the powder body exceeds 370mm (the shrinkage of powder metallurgy products is very large), and the weight of the powder exceeds 400 kg. The radial force of the rubber sleeve on the outside of the powder billet and the radial force of the steel sleeve pulls the crucible powder billet out slowly by using the gravity of the inner core weighing more than 300 kilograms.If you don't pay attention, the powder compact is broken.

After the powder car, it is sintered in a high-temperature furnace at a high temperature of 2250 degrees.

Finally, after mechanical processing, the Dawu crucible is obtained.

Machining is also a difficult problem. Most of the components of general cutting tools are tungsten. That is to say, the difficulty of machining tungsten with tungsten 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.

Yun Fei could only smile at such thoughts.

Tungsten is a very wear-resistant and high-temperature resistant material.Tools like diamond and cubic boron nitride are almost cut in the grain structure of the part surface. For processing general materials, they are artifacts at the level of Yitianjian and Tulongdao, but for ultra-difficult materials such as tungsten products, it is estimated to be It is equivalent to cutting bones with a bone knife or stone knife of the Stone Age.

For the processing of large tungsten crucibles, domestically made tools are quite good in rough turning.At that time, Yunfei and the others experimented with various tools, and finally selected YS8 domestically-made tools, which not only had high cost, good processing efficiency, and the cutting depth could reach 1-1.5mm per side, which required high technical level of workers.

For finishing, you can only choose Guizi's or American ultra-fine powder alloy tools.A small blade of 5mmX5mm, 100mm length, excluding tax, 400 RMB!This is still a friendly price, and people who have no access in Japan or the United States can't buy it at all.

There is no such artifact in the domestic market. If Yunfei'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 terms of finishing.

For such a difficult project, that investment cannot be afforded by Jiuyi Heavy Industry in a short time.

But this is related to the third generation of smart phones and some high-end digital products. It also has a lot to do with the upgrading of chips. If you want to realize that products such as sapphire and monocrystalline silicon are manufactured in China in this era, even if they are large Difficulties have to be done.

Otherwise, once the chip company makes all countries in the world feel painful, the most important silicon raw material must be cut off by the U.S. under Jewish control.

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

But this matter, no matter how you look at it, can't be done by a private company.Without the support of the state, without the investment of a large number of scientific research departments of the state, let Yun Fei do it himself, he would definitely not do such a fool.

There are many domestic companies producing tungsten and molybdenum products. At least, group companies such as Xiamen Tungsten and China Minmetals have research institutes and manufacturing companies that specialize in materials in this area.

Unfortunately, they can only study the low-tech tungsten wire used to make the lamp filament, and the production of mechanical cutting tools that are not advanced, and even the molybdenum wire for wire cutting in electrical machining. come out.

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

"Lao Sun, I know what you two mean. However, this project, a private company of Jiuyi Heavy Industry, simply can't afford it! We do not have specialized materials researchers and specialized materials research laboratories. We only rely on smelting. The shabby laboratory in the workshop simply cannot support the research of nanometer cubic boron nitride and related supporting projects."

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

"Xiaoyun, when we proposed this project, we did not mean that Jiuyi Heavy Industry should undertake the research funding for this project. As long as we start the project in advance and make certain progress, we can apply for project funds from the state... "This matter, although Yun Fei's face was dull, but Situ He Yun still didn't want to give up.

He also knew that it was too unfair for Yun Fei to allow Jiuyi Heavy Industry, which was already in short supply, to undertake the initial research funding of this project.

When there are certain results in the future, the country will definitely accept it and it is 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 own the technology exclusively.

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

"Project establishment? Mr. Yun, you are absolutely reliable in this matter? Our company can count how many materials professionals? Can it be possible to produce materials that the entire country has not produced based on these personnel in our company? "Yun Fei was really angry about Situ He Yun's ignorance.

I'm not afraid to offend this old guy now.

Take my private money to serve the country, I am so selfless?

No!

I am a petty citizen!

"I remember that you are engaged in automatic control? You are a master in electronic circuits. Are you also in materials? Jiuyi Heavy Industry is not easy to make money. Now there are several projects in the laboratory waiting for funds to start construction! "The more Yun Fei said, the less polite he became. At this moment, I still forget that Situ Heyun, an academician who enjoys a special state allowance, just volunteered to help Jiuyi Heavy Industry develop CNC machine tool technology.

"You..." Situ Heyun was so angry that he was speechless by Yun Fei's words.

"Mr. Situ, are you okay?" Seeing Situ Heyun clutching his chest and speechless, Mao Yadong, who was sitting not far from the door recording the meeting, hurriedly stepped forward to help the old man caress his chest, and kept giving Yun Non-passive winks.

However, Yun Fei, who was about to continue speaking, did not see her hint. When Yun Fei saw that the old man was frustrated, he was instantly stunned.

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

"Old Wu, what are you doing in a daze? Call the Aerospace Hospital and call for an ambulance!" Yun Fei froze for only a second.

Wouldn't it make the old man angry out of heart disease?

If so, I will die!

The most important thing is, who will lead your own CNC machine tool research team after the old guy has his braids?