Chapter 43 Thermocouple, done!

Another busy day has passed. On Friday night, Gao Zhendong sat at home and sorted out the things he had been doing recently and the current progress. There were more and more things to do recently, and he had to sort them out.

There was a piece of paper in front of Gao Zhendong, and he was writing and drawing on it, with lines of words appearing on the paper.

Thermocouple: The electrode trial production is basically completed, and the comparative test is in progress. The protection tube material is waiting for the progress of 3Z-591, and the welding and assembly of the secondary meter head trial product are completed. [Progress is normal] [Priority - high]

ESR: Learning and digesting. [Normal progress] [Priority - Low]

3Z-591: I have completed the trial production of ingredients and heat treatment. It is being handed over to Fang Yinghong and Liu Rongguo for performance verification tests. The new research plan has been submitted to Lao Chen for review. [Progress is normal] [Priority - high]

Transistor computer system: copying of instruction materials [not started yet], configuration of input and output devices [not started yet], compilation of basic operating environment [not started yet]. [Priority - High]

Special materials: Trial production completed with 3Z-591, heat treatment completed. Performance verification needs to be done in person. [Progress normal] [Priority - Medium]

The special material written by Gao Zhendong here is the alloy material he picked out from the GJB standard he drew earlier.

After taking a closer look and going over it in his mind, he decided that there was no problem with the thermocouple and that he could just proceed according to the plan. Besides, there were enough manpower and Gao Zhendong basically didn't need to worry about the details.

The trial production of 3Z-591 high-temperature alloy was fine except for the confidentiality issue. As for confidentiality, Gao Zhendong believed that Sister Fang and Xiao Liu also felt something from the trial production process of this material. In addition, according to Gao Zhendong's instructions, the two of them basically just worked and did not ask questions, so there was no need to worry about confidentiality.

The special material issue is going smoothly and there is no need to rush. Even if there are problems with the trial-produced product, as long as either of the two projects, the thermocouple and 3Z-591, has not been completed, we can do it again at any time.

ESR has been digested for a small part. Gao Zhendong is not in a hurry for this matter. It will be possible to promote it only after the thermocouple and 3Z-591 projects are settled and the positive effects appear for a long time. He has plenty of time. The technical time span in "Electroslag Remelting (ESR) Technology Principles and Latest Progress" is large enough, so it does not matter if it is earlier or later.

Transistor computer system, this is the most urgent. You can start copying books at any time, but you have to get familiar with the input and output devices, otherwise you will have no way to start the next step of basic operating environment compilation.

Gao Zhendong decided to go to consignment shops, supply and marketing cooperatives, hardware stores, etc. on Sunday. He had some ideas in his mind, but he wanted to see if he could find what he needed. If not, he would think of other ways.

After arranging his next personal work plan, Gao Zhendong took out paper, pen, and drawing tools and began to copy the CPU instruction materials.

The first parts he copied were the architecture and instruction set. After he finished copying these two parts, he had the ability to compile a basic working environment. After all, although he was familiar with the architecture and instruction set of 8086/8088 in his previous life, he had never learned 8008, so there was a certain difference.

In this way, he can copy books for a while, program for a while, and change his mind while working. Everyone knows that doing the same thing for a long time is not a pleasant experience.

He doesn't even have to wait for the configuration of the input and output devices and program memory before doing the work, because he can write it on paper first.

When Gao Zhendong thought about the museum related to the development history of domestic computer technology in the future, he would put his copied explanatory materials and original programming paper records in a glass display case, with a line of big words on the sign: "The design data and original program manuscript of the first domestic all-transistor computer. - Compiled by: Gao Zhendong", coupled with the female guide next to him and the cute children who came to visit one after another, Gao Zhendong was so happy that his nose was about to burst. Hey! I have thought too much, I have thought too much. Gao Zhendong collected his thoughts and continued to work.

Around four o'clock on Saturday afternoon, Gao Zhendong and his colleagues were in jubilation in the vacuum induction furnace laboratory.

"It worked! It worked!"

Deputy Section Chief Wu is also here. He is responsible for coordinating and cooperating with other departments outside the technical department and is usually not in the laboratory. However, as the most critical step in thermocouple research is about to be taken, Gao Zhendong specially invited him over.

Gao Zhendong was holding two test records in his hands.

One is a K-type (nickel-chromium-nickel-silicon) thermocouple, the nickel-chromium ratio of the positive electrode material is 90:10, the nickel-silicon ratio of the negative electrode material is 97:3, and the electrode insulation material is magnesium oxide.

一份是N型（镍铬硅-镍硅）热电偶的，正极材料的镍铬硅比为84.4：14.2：1.4，负极材料的镍硅镁比为95.5:4.4：0.1，电极绝缘材料同样为氧化镁。

After cold-end temperature compensation, the output thermoelectromotive force of both is about 1000mV at 40℃. Due to the lack of ultra-low temperature equipment, the current test working range is -20℃~1300℃ without a protective tube.

According to the verification experiment and comparative test records, both types of thermocouples have the advantages of good linearity, large thermoelectromotive force, high sensitivity, good stability and uniformity, strong anti-oxidation performance, low price, etc., and can be used in oxidizing inert atmosphere.

At the same time, the electrode repeatability verification showed that the manufacturing process of the electrode was very successful. Both K-type and N-type used the same material ratio, and three sets were trial-produced continuously using the same process, and their respective repeatability was very good.

The biggest difference is that from the temperature-electromotive force curve, the N type is smoother than the K type.

At this point, it can be said with certainty that the thermocouple has been made! Even without the 3Z-591 high-temperature alloy, the existing materials can make it work in many applications. After all, not all applications that require high temperature measurement need to be as high as 1300℃. For environments at 1300℃, specially selected material protection tubes can be used. 3Z-591 is the last piece of the puzzle that can make it possible to mass-produce thermocouples for use in 1300℃ environments.

Gao Zhendong held the test record and explained every item in it to Deputy Section Chief Wu. Deputy Section Chief Wu was smiling happily. As the deputy section chief of the technical department, he understood very well the value of this thing. It could not only be of great use in the production of this factory, but also provide a lot of support to sister factories and mines.

When everyone had vented their emotions, Gao Zhendong raised his hand to suppress them.

The members of the research team knew that he was going to arrange work, and they all fell silent.

Gao Zhendong first made a summary and set the tone: "I know everyone is very happy, and I am very happy too. Having come this far, we can say that this thing has been accomplished. We will continue to work hard and do the remaining work well, and then we can report our work to the organization and the factory!"

Everyone responded in unison: "Okay! Let's do it!!"

(End of this chapter)