Monster Factory

"Professor Cai, let me comment. My students, using the materials of your laboratory, the two-color metal ring sintered, can you reach the technical level?"

When Ye Qinggang entered, he saw a middle-aged man in a blue suit with some acne marks on his face. He was laughing at the young students next to him while taking a slot machine.

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

This is a metal ring with a square cross-section that is the same size as a regular bracelet.

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

The key is the intersection of the two colors, without any traces of splicing and polishing, completely integrated.

"Very...awesome." Zhongyun University is the team leader, Professor Cai Chenning. At this moment, I don’t know if the temperature in the sintering furnace in the room is too high, or what other reasons. Anyway, Professor Cai Chenning’s forehead is already covered with fine sweat.

However, on the side of the University of Science and Technology, one by one looks good, and the forehead has no sweat.

“Can you please also ask your school to show us the powder metallurgy technology?” Professor Xiaolin Jing, led by the University of Science and Technology, bent over to make an invitation posture: “It is not necessary to have two metals sintered together, others It’s OK, as long as it’s what your school thinks is advanced.”

And lost another game...

Professor Cai Chenning’s blue veins on his forehead bounced back and forth.

In terms of rankings, it is no doubt that the University of Science and Technology is much stronger than Zhongyun University. However, Professor Cai Chenning had some simple thoughts that this academic exchange was not the most advanced national industrial laboratory technology competition in the two countries.

All college students are college students. Even if the technology gap does not mean Zhongyun University, there will be no things that can't be taken out, so that the Japanese students can open their eyes.

However, the facts have made Professor Cai Chenning’s heart jump out.

Up to now, there have been seven technical comparisons in size. As a result, Zhongyun University only pulled back one game.

Sure enough, they lost a game in the morning and found it back in the afternoon.

In the afternoon, I visited the Powder Metallurgy Laboratory. Professor Xiaolin Jing, who led the team, couldn't wait to let one of them look at the students, and use the materials in the lab to give them a lesson in the mechanical engineering department.

Dissimilar metal sintering.

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

How to weld two metals with different materials together?

As the saying goes, the difference is not the same, this is also applicable in the metal welding industry. Different metals are forcibly welded because of the difference in melting point and characteristics. It is sure that the strength of the welded joint is too low, and it will fall to the ground, and the "啪嗒~" will be broken into two pieces.

Welding of dissimilar metals is extremely difficult. It requires not only a very deep understanding of metal materials, but also the ability to take out various flux solutions according to local conditions, as well as master-like welding techniques to weld qualified industrial parts.

Those who master this technology are the treasures that the major factories compete for each other.

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

Because of the difference in melting point of the metal, it is necessary to add a layer of adhesive capable of bonding the two materials at the bonding 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.

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

However, just this afternoon, a graduate student at the University of Science and Technology, using silver and copper metal powder, successfully sintered a perfect heterogeneous metal ring without adding a binder.

This product is not a product that can't be used.

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

"Professor Xiao Linjing, it is not early in the sky. I think the students in your school must be hungry. Tonight, the cafeteria specially prepared a sliced ​​roast duck for everyone. Would it be better for the students to eat while chatting?" Professor Cai Chenning said helplessly. The sloppy eyes also admitted that the students of Zhongyun University could not find similar powder metallurgy technology.

The University of Science and Technology of Japan sent a graduate student, so according to the rules of the convention, Zhongyun University can only send graduate students or college students.

Professor Cai Chenning can't play himself in person.

"Not hungry or hungry." Kobayashi raised his head and shot two smug eyes in his eyes: "Tanaka, you talk to them, the firing technique of dissimilar metals."

The student holding the metal ring, looked up proudly, and looked around the audience: "The physical properties vary greatly between different metals. The primary sintering technique I use is the principle of the base gradient joint. The two metal powders are placed one by one. The mold is pre-applied with pressure, and then the temperature control requirements are most demanding during the sintering process of the electric furnace."

"The melting point of silver is 961 degrees, and the melting point of copper is 1083 degrees. How to find the equilibrium point of the melting point of these two metals, the pressure of the two kinds of materials is different. The density of the gap between the materials determines the melting. speed."

The students at Zhongyun University have avoided the eyes of Tanaka one by one.

If you lose, you will lose. Who makes the technology worse?

Fortunately, this Tanaka student did not take advantage of the opportunity to show a sense of superiority, otherwise they found a heart that has been sewed into it.

The people in Tanaka are good, not only telling the technical points, but also not hitting people.

It’s too naive for these students. The Japanese Polytechnic University is far from the ocean, not hitting people. Isn’t that white?

"just……"

“In the operation, I found several problems.”

The student named Tanaka suddenly turned his voice and became proud of his voice: "Your equipment is too backward, in our school's laboratory. The stamping machine for pressing the embryo is the multi-angle CNC of Yamazaki Mazak. punch."

"You can't even adjust the angle of this equipment, even the impact coefficient is not adjustable."

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

"With these metal powders, we invented the ultrafine metal nanoparticle preparation technology in the early 1960s, Professor Ueda Nakaji." Tanaka licked the metal powder remaining on his fingers: "But you still take this Use as thick as flour."

“The most critical electric sintering furnace, even the technical level of our last century is not as good. The laboratory must have the appearance of a laboratory. How can this kind of elimination equipment promote the advancement of powder metallurgy technology?” Continued., Your support is my biggest motivation.) 16-10-3104:42:08