Monster Factory - 379

“Professor Cai, please comment. My students, using the materials of your school’s laboratory, sintered this two-color metal ring, what technical level can it achieve?”

As soon as Ye Qing entered, he saw a middle-aged man in a blue suit with some pox marks on his face. He laughed and patted the young student next to him like a slot machine.

In the hands of this student, there was a metal ring that attracted Ye Qing’s attention.

This is a metal ring with a square cross-section, the size of which is the same as that of an ordinary bracelet.

The metal ring sintered in the powder metallurgy laboratory is naturally processed by powder metallurgy technology. But this metal ring is half golden and half silver.

The most important thing is the intersection of the two colors, without any traces of splicing and polishing, it is completely integrated.

“Very…awesome.” Professor Cai Chenning is leading the team at Zhongyun University. At this moment, I don’t know if the temperature emitted by the sintering furnace in the room is too high, or some other reason. Anyway, Professor Cai Chenning’s forehead was already covered with fine beads of sweat.

However, on the side of Nikkei University of Science and Technology, all of them looked happy, with no sweat on their foreheads.

“Then can you also ask your school to show us powder metallurgy technology?” Professor Kobayashi, led by the Nikkei University, bent over and made an inviting gesture: “It does not have to be two metals sintered together, other This is fine, as long as your school thinks it is advanced.”

Lost another game…

The veins on Professor Cai Chenning’s forehead pulsed back and forth.

In terms of rankings, there is no doubt that the University of Japan Science and Technology is much better than Zhongyun University. However, Professor Cai Chenning was a little simple before that this academic exchange was not the most cutting-edge national industrial laboratory technology competition between the two countries.

It’s all about college students versus college students. Even if the technology gap doesn’t mean Zhongyun University, there is nothing that can’t be produced to open the eyes of the students of Japan Institute of Technology.

However, as a result, Professor Cai Chenning’s heart jumped out.

Up to now, there have been seven technical competitions in total, and Zhongyun University has only pulled back one round.

Sure enough, the game they lost in the morning was found in the afternoon.

In the afternoon, I visited the powder metallurgy laboratory. Professor Kobayashi, who led the team, couldn’t wait to let one of them use the materials in the laboratory to teach students from the Department of Mechanical Engineering a good lesson.

Sintering of dissimilar metals.

In the field of industrial processing, such a problem is often encountered.

How to weld two different materials of metals together?

As the saying goes, different things don’t work together, and this is also true in the metal welding industry. Different metals are forcibly welded because of their different melting points and characteristics. They will surely fall to the ground due to the low strength of the welded joints and break into two pieces.

The welding of dissimilar metals is extremely difficult. Not only do we need to have a very deep understanding of metal materials, be able to come up with various flux schemes according to local conditions, but also master the master welding technology to weld industrial parts with qualified strength.

Those who master this technology are all the treasures of the major factories competing with each other.

In powder metallurgy, the sintering of dissimilar metals is also a constant problem.

Because of the difference in the melting point of the metal, it is necessary to add a layer of adhesive that can stick the two materials at the junction of the two metals. In this way, if you want to sinter a qualified product, you often have to scrap more than a dozen products.

Inherent deficiencies, whether it is dissimilar metal welding or dissimilar metal sintering, it can only be a very small and very deep processing technology.

But just this afternoon, a graduate student at the University of Nikkei used silver and copper metal powders to successfully sinter a perfect heterogeneous metal ring without adding a binder.

However, this product is not something you can’t seem to use.

In order to prove this point, the student had already handed over his work to Zhongyun University and tested it with a tensile tester.

“Professor Kobayashi, it’s getting late, I think the students in your school must be hungry, the cafeteria specially prepared a piece of roast duck for everyone tonight, why don’t you let the students eat and chat?” Professor Cai Chenning started helplessly. He was sloppy and admitted in disguise that the students of Zhongyun University could not come up with similar powder metallurgy technology.

The Japanese University of Science and Technology sent a graduate student, so in accordance with the established rules, Zhongyun University can only send graduate students or college students.

Professor Cai Chenning can never play by himself.

“I’m not hungry or hungry.” Kobayashi raised his head, and two triumphant rays of light came out of his eyes: “Tanaka, you can talk to them about the firing techniques of dissimilar metals.”

The student holding the metal ring raised his head proudly and looked around the audience: “The physical properties of different metals vary greatly. The one-time sintering technique I use is based on the principle of gradient joints. First, put the two metal powders one by one. In the mold and pre-pressure forming, followed by the electric furnace sintering process, the requirements for temperature control are the most stringent.”

“The melting point of silver is 961 degrees, and the melting point of copper is 1083 degrees. How to find the balance point of the melting points of these two metals is based on the different pressures of the two material powders. Because the density of the voids between the materials determines the melting speed.”

The students at Zhongyun University avoided Tanaka’s gaze one by one.

If you lose, you lose. Who makes the technology inferior to humans?

Fortunately, this Tianzhong student didn’t take the opportunity to show off a sense of superiority, otherwise they would find a way to get in.

Tanaka’s people are good. Not only did they explain the technical points, but they didn’t hurt people.

This group of students are too naive, and the Japanese University of Science and Technology has come across the oceans to avoid hitting people. Isn’t that a waste of time?

“only……”

“During the operation, I found several problems.”

The student named Tanaka suddenly changed his tone, and his tone became proud: “Your equipment is too backward, in our school laboratory. The stamping machine used for embossing is a multi-angle CNC machine from Yamazaki Mazak. punch.”

“For your equipment, the angle is not adjustable, even the impact coefficient is not adjustable.”

“Our school, the obsolete equipment piled in the warehouse is also more advanced than yours.”

“There are also these metal powders. As early as the 1960s, Professor Ueda Ryoji invented the ultrafine metal nanoparticle preparation technology.” Tanaka twisted the remaining metal powder on his fingers: “But you still use this Use for things as coarse as flour.”

“The most critical electric sintering furnace is not as good as our technological level of the last century. The laboratory must look like a laboratory. How can this kind of obsolete equipment promote the advancement of powder metallurgy technology?”