Monster Factory

“Professor Cai, please comment. What technical level can my students achieve with this bi-colored metal ring sintered with materials from your lab? ”

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

In the student's hand, there was a metal ring that attracted the attention of Ye Qing.

This is a cross-sectional metal ring with the same size as a regular bracelet.

Metal rings sintered in powder metallurgy laboratories are naturally processed using powder metallurgy techniques. But this metal ring, it's half golden and half silver.

The most important thing is the intersection of the two colors, without any signs of stitching and polishing, completely integrated.

“Very... awesome.” This side of Zhongyun University leads the team, is Professor Chenning Cai. It is not known whether the temperature emitted by the sintering furnace in the room is too high at this moment or for any other reason. Anyway, Professor Cai Chenning's forehead is already covered with fine sweat beads.

But on the Japanese Polytechnic side, a pleasant look, no sweat beads on the forehead.

“Could you ask your university to show us powder metallurgy?” Professor Kobayashi, led by the Nippon Polytechnic University, bends over and makes an invitation posture: “You don't have to sinter the two metals together, and the rest, as long as your university thinks it's advanced. ”

Another defeat...

Professor Tsai Chenning beats back and forth with the blues on his forehead.

In ranking, there is no doubt that Nippon Polytechnic University is much stronger than Zhongyun University. But Professor Tsai Chenning had previously held the view that this academic exchange was not the most advanced national industrial laboratory technology competition between the two countries.

College students against college students, even if the technology gap does not represent Zhongyun University, there is nothing that cannot be handled to open the eyes of the Japanese science and technology students.

However, the fact is that Professor Cai Chenning's heart is about to burst out.

So far, there have been seven technical trials, the result of which is that Cloud University has only taken back one game.

Sure enough, they threw a round in the morning and found it back in the afternoon.

Visiting the powder metallurgy lab in the afternoon, Professor Kobayashi, who led the team, couldn't wait to make one of them look good, use the materials in the lab, give them the mechanical engineering students a good lesson.

Heterogeneous metal sintering.

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

How do you weld two different metals together?

It is also true in the metal welding industry that the saying that there is no plan to make a difference is also true. Different metals are forced to weld due to different melting points and characteristics. They will definitely fall to the ground because the strength of the weld is too low, and “snap ~” is broken into two pieces.

Welding of heterogeneous metals is extremely difficult and requires not only a very deep understanding of the metallic materials, the ability to come up with various welding solutions according to local conditions, but also the mastery of welding techniques in order to weld industrial parts with acceptable strength.

The masters of this technology are nothing but competing treasures from major factories.

In powder metallurgy, sintering of heterogeneous metals is also a major challenge.

Because of the different melting points of the metal, a layer of adhesive capable of adhering to both materials needs to be added at the adhesion of the two metals. As such, more than a dozen products are often scrapped in order to sinter a qualified product.

Innate deficiencies, whether foreign metal welding or foreign metal sintering, are destined to be very small and deep processing techniques.

But just this afternoon, a graduate student at the Nippon Polytechnic University, using two metal powders, silver and copper, successfully sintered a perfectly heterogeneous metal ring without the addition of adhesive.

This product is biased, it doesn't look useless.

To prove this, the student has given his work to Zhongyun University and tested it with a pull tester.

“Professor Kobayashi, it's getting late. I think your students must be hungry. Tonight the cafeteria specially prepared a skin roasted duck for everyone. Why don't we let the students eat and talk?” Professor Cai Chenning somehow punched so-so eyes and disguised himself as acknowledging the students of Zhongyun University, unable to come up with similar powder metallurgy technology.

The Japan Polytechnic University sends a postgraduate student, so according to the agreed rules, only postgraduate students or university students can be sent from Zhongyun University.

Professor Cai Chenning could not appear on his own.

“Not hungry, not hungry.” Kobayashi raised his head and shone two glows of pride in his eyes: "Tanaka, talk to them about the techniques of burning Fae metals. ”

The student with the metal rings looked up proudly and looked at the whole field: "Physical performance varies greatly from metal to metal. One sintering technique I use is the base gradient joints principle. The control of temperature is most demanding when two metal powders are first placed in the mold and pre-pressure-formed, followed by sintering in an electric furnace. ”

“The melting point of silver is 961 degrees, the melting point of copper is 1083 degrees. Tips on how to find a balance between the two metal melting points, based on the different pressures applied to the two material powders. The melting speed is determined by the density of the voids between the materials. ”

Students from Zhongyun University, one by one, avoid the eyes of the field.

If you lose, you lose. Who makes technology worse than people?

Good thing this Tanaka student didn't take the opportunity to show a wave of superiority, otherwise they would find a heart to sew into.

Tanaka is a good man, not only speaks out the technical points, but doesn't strike people.

These students are too naive. The Japanese Polytechnic University came all the way across the ocean and didn't strike people. Isn't that for nothing?

“But…”

“During the operation, I noticed several problems. ”

This student named Tanaka suddenly turned his head and became proud: “Your equipment is too backward, in the lab of our school. Embryo press machine is a multi-angle CNC punch machine for Yamazaki Mazak. ”

“It's fine if the angle of your device is not adjustable, even the impact coefficient is not adjustable. ”

“Our school, the end-of-life equipment stacked in the warehouse, is also more advanced than yours. ”

“And these metal powders, we invented ultra-micrometal nanoparticle preparation as early as the 1960s, by Professor Ryoji Ueda.” Tanaka twisted the metal powder left on his finger: "But you still use it like flour. ”

“The most critical electrocaloric sintering furnace, it's not even as skilled as we were in the last century. Laboratories need to look like laboratories. With this kind of decommissioning equipment, how can we advance powder metallurgy technology? ”