"Can I try this edge?" Hibbs couldn't pretend to be reserved anymore, and he couldn't wait to ask Qin Hai.

Qin Hai smiled: "Please, but you want a small ......"

Before he could say the word "heart", he saw a touch of red bloom on Hibbs's fingers, and this unbelieving fellow actually tried the edge of the rake blade with his hand, and the result was a clean cut.

"It can't be!" Hibbs shouted out in a gaffe, "How did you solve the problem of ceramic cutting blades!" ”

Everyone knows that ceramics are a highly wear-resistant material, and Tolfsen also has a team working hard to solve the problem of cutting edge of ceramic basic parts. Or, more precisely, to study how to make ceramic ware thinner while maintaining strength.

Ceramics are fired from porcelain clay, which itself is not too sticky, and if it is made too thin, it is easy to break. In order to improve the viscosity of porcelain clay, ceramicists try to mix colloids into porcelain clay to turn porcelain clay into viscous cement, and then use extrusion or forging to make thinner utensils.

After the appliance is formed, it is sintered, which is an indispensable process in the production of ceramics. During the sintering process, the colloids in the porcelain clay will evaporate due to high temperatures, leaving only the porcelain clay to become ceramics after being transformed into ceramics. The problem lies in the evaporation of the gums, which will leave countless tiny holes in the porcelain clay after evaporation, which will reduce the strength of the ceramic products, and may even leave the hidden danger of foreign body penetration.

Unable to solve these technical challenges, Tolfsen's engineers were unable to manufacture a sufficiently thin ceramic harrow, let alone cut it. However, the ceramic rake piece that Qin Hai took out was really cut at the cutting edge, and Hibbs proved several points at the cost of blood: first, the blade was thin enough; Second. The surface of the knife edge is very smooth; Third, the material was dense enough that not a single trace of the blood from Hibbs's hands penetrated into the ceramics. From the latter two items, it can be seen that the Chinese have solved the problem of fine pores after gel evaporation.

This disc rake piece is a new product developed by Qin Hai under the guidance of Quwu Brothers Ceramics Factory. Its porcelain clay is made of nano-sized zirconia powder, which is pressed with a special gel. with this gel. Combined with the special sintering process, it can ensure that the green body shrinks when the gel evaporates, so as to eliminate the pores of the gel and obtain dense and high-strength ceramic products.

Qin Hai spent so much energy developing this new process, of course, not to produce disc rake chips. In fact, the manufacture of disc rake sheets from nano-scale zirconia materials is too extravagant. Qin Hai's target was a very popular household item in later generations - ceramic knives.

The hardness of zirconia ceramic knives is second only to diamond, and it can achieve almost never wear out when used in a home environment. You don't have to sharpen your edge as often as you would with a metal knife. In addition, ceramic knives are beautiful, easy to clean, never corroded, and do not produce the same fishy smell as ordinary metal knives when cutting food, which quickly became popular around the world at the beginning of the 21st century.

Last time, Liu Shuo and Huang Yanling went to Qin Hai's house and proposed to enter the civilian ceramic market. In order to be able to borrow such a platform as the Agricultural Machinery Exhibition. He specially asked Liu Shuo to make a few ceramic disc rakes, although it was overkill. But it can be used for advertising, and it is also worth the money.

With all the twists and turns in between, Qin Hai naturally wouldn't explain too much to Hibbs, seeing that Hibs was bleeding on his hands, he gloated and said "sorry", and then handed the blade to the staff. Get them to be included in the test.

"How is this possible?" Hibbs's mind was dizzy, and he was almost a little suspicious of what he saw, but the blood on his hand reminded him that this qiē was true.

"Mr. Qin, you said that there is no product that has been tested to the upper limit of durability. Is this ceramic rake piece? Hibbs asked.

Qin Hai nodded and said, "Yes, because of time, we were not able to complete the test of its durability limit, however, in our test, the same rake blade withstood more than 500 hectares of durable solid yàn, and the knife body did not show significant wear." ”

"It'......s natural," Hebbs muttered, adding that the wear resistance of ceramic materials is not comparable to that of metal, and it is not surprising that if steel can only wear 100 hectares, ceramics can reach 500 hectares.

"Can you tell me what kind of ceramic is this rake piece made of?" Hibbs asked again.

"It's zirconium dioxide, and in addition to some trace amounts." Qin Hai replied briskly.

Qin Hai is planning to buy and sell ceramic knives, so the main material of the knife must not be hidden, not to mention, this kind of thing can't be hidden, others can just buy a knife to conduct a test can be analyzed. The real technical secret of the ceramic knife lies in the gel and sintering process used by Qin Hai, which is a problem that countless people have spent 20 years to solve, and Qin Hai only crossed this technical threshold with the help of crossing such a cheat.

The gel has evaporated during the sintering process, and its composition cannot be explored from the knife. The sintering process is even more tricky, there are millions of combinations of temperature and time, and no one can guess it out of thin air unless industrial spies can be sent to spy on it.

After Qin Hai sent all the basic parts in, the staff started the equipment and began to test. Although the criterion for evaluation is the durability of the foundation in soil operations, the real test is not carried out on the land, because hundreds of hectares of real life are often unacceptable, both in terms of time and cost.

The test method used by the organizing committee is to place the basic parts in a machine to rotate them at high speed, and then use friction materials to make contact with them to calculate the speed of wear of the basic parts. Such tests can simulate the effects of hundreds of hectares of farming in a relatively short period of time, and for the sake of visualization, the final test results are also presented in terms of working area.

The whole expo has a large area of the venue, but the interpersonal circle is very small, and these manufacturers of agricultural machinery have more or less some connections with each other. The Chinese brought some basic parts for the production of special materials and special processes, and said that they could exceed the world's advanced level, and such a news quickly spread throughout the venue. As a result, before Cui Hongchun led people to set up the booth, there was already an endless stream of people who came to visit and exchange. You know, the real time for the start is tomorrow.

"Sir, how do you treat the surface of your knives?"

"Excuse me, is this a pure ceramic knife? Oh, cake seller, how did you make the ceramics so thin? ”

"Can I use it to cut paper? Behold, it is sharper than a paper cutter......"

"I visited your country three months ago, but we didn't hear anything about these knives at that time, did you deliberately block the news?"

"I'm curious to know, do you need an agent for the European market......"

People of all colors gathered in front of the Chinese delegation's booth, looking at the various basic pieces displayed on the booth, and at the same time pulling the Chinese in the booth to ask long and short questions. This time, it can embarrass everyone. In this group, in addition to the translators, there are only five who can speak English, including Ning Jing and Qin Shan, two high school students. Compared with those factory directors in their 50s, Ning Jing and Qin Shan are simply "super good" in English.

"Little girl, you can help me listen, what are they talking about?" Zhu Detai, the director of the North Agricultural Machinery Factory, pulled Qin Shan to his booth, pointed to the two white people who were talking lively, and said in a begging tone.

"Uncle Zhu, my English is not good...... Qin Shan replied embarrassedly.

Zhu Detai didn't have the demeanor of an elder, and said with a dead face: "No matter how bad your English is, it is much better than your Uncle Zhu...... Alas, if I had known this, I would not have come out to show this eye. Now Uncle Zhu has no choice, you have to help Uncle Zhu no matter what. ”

"Otherwise, I'll try." Qin Shan is a kind-hearted girl, and she can't help but feel a little unbearable when she sees Zhu Detai's boss pretending to be so pitiful at his age. She stepped forward, desperately searching for English words in her stomach and communicating with the other party. When she encountered something she really didn't understand, she simply pulled a piece of paper, asked the other party to write out the words, and then coped with the scene with a blind guess.

"Uncle Zhu, they said, they're here in the United States, and their company is called ...... You see, it's this word, I don't know how to translate it, and they ask you if the performance indicators of these disc rakes that you mark are real. After listening to a paragraph, Qin Shan began to translate to Zhu Detai.

"YES, YES, WHAT'...... Xiao Qin, you tell them that our indicators are true and correct, we have been repeatedly tested in China, the performance is stable, the quality is reliable, and the implementation of the three guarantees ......" Zhu Detai couldn't help but recite the propaganda slogan in the factory.

After hearing this, Qin Shan frowned, and turned her head to explain to the other party. The other party also knows that the English level of Chinese is not high, and they are not very picky. They nodded while listening, and from time to time they helped Qin Shan correct her vocabulary and grammar, which was equivalent to being a free English teacher for Qin Shan.

Finally sent this group away, and before Zhu Detai could say a word of thanks to Qin Shan, another factory director over there ran over in a hurry, grabbed Qin Shan's hand, and shouted: "Little Qin girl, help your uncle, uncle is in a hurry......

Qin Shan couldn't cry or laugh, and hurriedly responded: "Uncle Zhang, don't worry, I'll come over." …… Uncle Zhu, I'll go first. ”

"Hey, Xiao Qin, don't go, I'm ...... Alas, Lao Zhang, how can you kid rob Hu! Zhu Detai jumped to his feet in anger and scolded. (To be continued......)

PS: I recommend my friend's new work "Game Development Giant" "Smoke and Rain", which goes back to 1984 and started developing games. Although it is not a work of the Industrial Party, it is also an entrepreneurial article. 200,000 words, not counting seedlings, interested students can take a look.