"It''s good if there''s no problem. Now let people check the dimensions of these products, and then make records. After cleaning, weigh and seal the packaging, otherwise it will be oxidized..." the temperature is a little high these days. Even the tungsten and molybdenum atoms that are not easy to react with oxygen will soon be oxidized in the hot air.
The finished product of pure molybdenum crucible is silver white. If it is oxidized, there will be many gray spots due to the problem of density, which makes the phase of the whole product too ugly.
"By the way, Xiao Zhang, have the purity and density of our sintered crucibles been sent to the physical and chemical analysis room for testing? If the purity and density can''t meet the requirements of 91 material, it''s troublesome... "
Xue Daoming, who had just breathed a sigh of relief, suddenly remembered that the small molybdenum crucibles produced in several batches in front of him were rejected by 91 material because their purity did not reach 99.95% of that proposed by 91 material, only 99.8%; At the same time, the density did not reach 9.98 gcm3-10.03 gcm3 proposed by 91 material. It is precisely because of this problem that the small molybdenum crucible, which originally required only three days for the production period, has not been delivered until now.
"Leader, the density has been reached, but the purity is still a little different, only 99.91% - 99.96%. This..." when he heard this, Zhang Defu, who was full of confidence, immediately became sad.
Although the process is proposed by the Jiuyi material, the Jiuyi material only provides a range for many production parameters, but it is not accurate to specific values.
This is very painful for the technicians of 754 factory.
However, they also know that there will be slight differences in the molybdenum crucible produced by different isostatic pressure and pressure holding time after powder loading.
The problem of purity is the problem of raw materials.
The molybdenum powder suppliers have no way to determine the purity of the molybdenum powder. They bought several tons of raw materials and spent hundreds of thousands of material costs for the order of about 30000 from the 91 Research Institute. If it were not for the production of some electronic components, Xue Daoming would have to cry blind.
"Alas! We''ll have to wait and see what Yun Fei says when he comes. Get the test report ready. I think he''s coming. " Xue Daoming also knows that in terms of purity, they can control only a small part.
Pure tungsten powder is obtained through chemical reduction reaction. They can only purify in a small range in the physical and chemical analysis laboratory. The most important thing is the sieve powder in the first process. If those large grains cannot be selected, it is impossible to achieve too high density.
"Mr. Yun, Mr. Xue went to the fifth branch factory. Why don''t you sit in the reception room for a while and I''ll call Mr. Xue?" As soon as Yun Fei appeared at the gate of factory 754, Chen Xiaoqiong, who was waiting for him in the guard room, rushed out and said to Yun Fei, who had not yet been stopped outside the door.
"It''s all right. I''ll just go to the fifth branch factory. My purpose is to go to the fifth branch factory to see our products..." Yun Fei said with a smile to the middle-aged woman who wanted to introduce herself.
"..." Chen Xiaoqiong was shocked, but Xue Daoming told her to invite Yun Fei to the office first and wait for him to come back from the Fifth Branch
But now Yunfei is going directly to the fifth branch factory. Where does she have any good reason to stop Yunfei?
Tell Yun Fei that Xue Daoming has no confidence in the products produced by the fifth branch? You need to confirm before you can come back and take Yunfei to see it?
In that case, Xue Daoming will definitely kill her!
"Mr. Yun, why did you come directly to the workshop?" Seeing Yunfei with two tough middle-aged men entering Zhang Defu''s office company of the fifth branch, didn''t he let Chen Xiaoqiong stop Yunfei at the door?
"I can''t let go until I see the finished product. Mr. Xue, you haven''t seen Deng Lanqing, my chief engineer. You are very strong. You come to my office every day. Who can stand it?" Yun feipi said with a smile.
Deng Lanqing''s Biao Han is hot, and the whole city of Chengdu knows it.
When she was carrying out the experiment, Xie Heping took some customers with investment intention to visit the 91 Research Institute and wanted Deng Lanqing to stop the experiment and introduce it to the customers. As a result, Deng Lanqing, who had not made progress for a long time, was driven out of the laboratory, which made the whole Chengdu know.
Even the Sichuan girl, who is famous for her shrewdness, is weaker than Deng Lanqing, a northern girl.
"Yun always joked. Such a thing will never happen again... "Xue Daoming immediately felt that the weather in the morning became hot at once when he heard Yun Fei''s words.
If Deng Lanqing came to the door, it would not be as easy to talk as Yun Fei.
Deng Lanqing is a madman in the eyes of many people!
A bitch!
If this woman comes to the door, how can she live?
"Where is the product of the first furnace? Let''s have a look first. If I don''t see the finished product, I really can''t let go! " Yun Fei is telling the truth.
This thing is crucial to the study of Nd-Fe-B.
Many projects are waiting for the materials to be put into the pot.
In the past two years, with the rapid development of China''s electronic information industry, automobile industry and other industries that need NdFeB rare earth permanent magnet materials, China has more and more requirements for these high-performance rare earth permanent magnet materials. There are not many foreign manufacturers monopolizing these high-performance materials, and they have also formed a price Alliance for China. Now they are ready to raise prices by a large margin, Negotiations are under way with China!
The 91 research institute does not have much of this material.
The sensor needs of production equipment, the sensor needs of robot and the research of computer hardware. With the acceleration of research progress, the demand is increasing
"Are these molybdenum crucibles contaminated with water?" The small molybdenum crucible of the first furnace is not large, with a diameter of only 140mm. Yun Fei frowned as soon as he got the product.
It must be that these guys started to take the furnace before the temperature in the furnace was completely cooled to normal temperature, and the sweat of the workers dropped on it. Otherwise, no matter how hot the weather is, the sintered small molybdenum crucible will not be oxidized so soon
"No, after we took it out, we cleaned it with alcohol. How could it be stained with water?" Seeing several gray spots on the bottom of the crucible in Yun Fei''s hand, fine beads of sweat began to appear on his forehead.
The purity and density of this product are not enough. The problem of oxidation is a troublesome thing.
Everyone''s sweat is salty!
Moreover, the small molybdenum crucible used for sintering rare earth permanent magnets cannot be washed with alkali or acid water. Otherwise, the acid or alkali remaining in the crucible will damage the rare earth permanent magnets in the crucible
"Sweat!" Yun Fei said coldly.
At high temperature, salt water can quickly react with molybdenum atoms
"This, this..." Xue Daoming became anxious. For the production process of this small molybdenum crucible, more than a ton of materials have been wasted, coupled with labor, energy and others, hundreds of thousands of costs!
What if the cloud cancels the order and there are no subsequent orders?
Domestic enterprises that can use small molybdenum crucibles simply don''t look up to enterprises like them.
If it can''t create benefits in a short time, it is likely to be sold or directly closed down by the whole Chengdu city government!
In recent years, too many enterprises have gone bankrupt in China.
"Let''s not talk about this first, Mr. Xue. What are the technical conditions of these small molybdenum crucibles?" Seeing those spots that oxidize rapidly because of workers'' sweat, Yunfei is very happy. He is worried about how to sell the deionized water anti-oxidation technology to 754 factory.
It''s like dozing into a pillow.
As long as these products meet their technical standards, and then sell this anti-oxidation technology to them, it is absolutely certain.
Many semi-finished products such as wooden yuan plates, tungsten target blanks and molybdenum yuan blanks produced by the fifth branch of 754 were returned by 91 materials because they failed to pass the anti-oxidation technology. These materials used in electronic products can not be cleaned with acid and alkali at all
This technology doesn''t sell much. Let 754 factory give $3.5 million, which is almost enough.
Many enterprises in China need such technology. Even if they sell ten, they can earn an income of $35 million.
This is much higher than investment!
Hundreds of percent.
"Mr. Yun, due to the immaturity of the process, the purity is still a little unable to meet your requirements..." Zhang Defu said to Yunfei with embarrassment on his face.
Yun Fei was stunned.
Nima, it''s been several months. The production process is not mature yet? I provided a complete production process at the beginning. Although I have more than three or two times, I can master the parameter range!
"Tell me the specific data. What''s the difference? One percent is also a little, and 0.1 percent is also a little! " Yun Fei''s face began to get cold.
Directly speaking of the data, you can understand the difference at once!
I said a little bit in general!
"The purity is only 99.91% - 99.96%. This..."
"All?" Yun Fei frowned.
Whether tungsten crucible or molybdenum crucible, purity 99.95 is the minimum standard. The higher the purity of the crucible, the longer the service life.
Even if the density reaches 99.95%, the service life of these crucibles is generally three months later!
The cost of a small molybdenum crucible of about 5kg is about 3000 yuan. In the cost of producing Nd-Fe-B rare earth permanent magnet, it needs about 30 yuan per kilogram!
If the service life is short by one day, the cost will have to be increased
"Yes, Mr. Yun, we will certainly improve in the future, but this, you see..." Wu Daoming has strangled the hearts of those people in the production department and the marketing department. If it weren''t for them, where would such a problem occur?
"You mean concession?"