When Su You got angry and was slapped on the head at every turn, Su You turned around and ran to mix carburizing paste with Shi Fu.

It sounds very fancy, but it is actually the main component of carbon black chimney ash; the sodium carbonate plant ash solution is poured and filtered repeatedly, and then the sodium carbonate and potassium carbonate are separated by heating crystallization method; add oil in proportion and mix it into a paste.

The carburizing box is even simpler. Add water glass and coal ash to make a refractory board, then paste the water glass into the box and bury it in the coke pile.

For various tools that need carburizing, various turning tools, files, carpentry chisels, planers, and drill bits are wrapped in carburizing paste into thick clay embryos, placed in a box, and fired in the kiln.

The color of the fire must be controlled by Shi Fu. After the box starts to turn red, remove the fire and keep it warm inside the box for an hour. Take it out and use hot oil to cool it down. Then break the embryonic shell and take out the iron parts.

Shi Fu used the previous file to file these iron parts: "Fierce! So fierce! The file is slipping, and my teeth are all flattened..."

Su You checked the iron parts and found that the carburizing depth should be more than three millimeters. He tested it with a steel sheet and found that the hardness was at least 6.7. He couldn't help but smile and said: "The carburizing technology is finalized. Shi Tong didn't bring it when he came.

A few kilograms of good pork, but I won’t give him this skill!”

Shi Fu was very anxious: "It took me so long to look at the drawings with a micrometer, wait until next time to see how I deal with him!"

Su You was not in a hurry. In half a year, he was able to finalize the design of the first machine tool master bed and build a prototype from scratch. In his mind, it was an act that defied heaven. He couldn't help but say good things for his apprentice: "

Slow work brings out the best, and we still have a lot to do here. Now that carburizing technology has been used, many stamping molds can be trial-produced."

There are many things to do, such as plates, bowls, wine glasses, basins, split wine bottles, soup pots... They all need to be poured out of the iron mold with a sand mold first, then the iron mold is made smooth, carburized to adjust the hardness, and then polished again to shape.

There are also carvings and blank spaces on various utensils, and there are not as many things as usual.

However, in order not to delay production, Shi Fu and Su You first made the stamping die for the folding knife blade. They first folded and forged the steel material on a forging machine, and then hammered it into thin sheets. Then, the children worked and punched out individual pieces on the iron sheet.

The razor blade is coming.

In order to facilitate the grinding of blades, Su You invented a foot-operated workbench.

The workbench is actually similar to the lower part of a pedal sewing machine, but the tabletop becomes a grinder, which is used to sharpen the blade into a large size, and then sends it to a belt sander driven in the same way to finely grind the blade.

Using a universal vise, guide rails, and angle rulers, the dimensions of the polished blades were exactly the same. Shi Fu became the workshop director, measuring the accuracy of the blades with a centimeter all day long.

Su You was only responsible for determining the process, writing technical manuals, and paying attention to matters such as never blowing iron filings with your mouth. He completely became a hands-off shopkeeper and picked up rhyme studies again.

Just kidding, I want to be a scholar and a doctor...

But the children in the dragon were mobilized again, and they were responsible for collecting one thing when hunting pigweed: lichen.

Collecting alone is not enough. You also need to remember the location to facilitate a second inspection.

Since he came back, the area around the ancestral hall has become lively again, and now there are so many fun things. Children come here to join in when they have nothing to do.

Su You saw that the fire was still going on, so he simply expanded the room into two more rooms, and used pipes to provide floor heating and hot water for classes.

Now the kids like to come here even more. Apart from anything else, at least they are warm!

Su You didn't care. Even if he came to study with him, he would definitely have to leave in the future, and he didn't know when he would come back. It was a good thing to leave some seeds in Kelong.

The course was still one section of literature and one section of science and engineering, which took a whole morning. After the class was over, the mouse came to talk to him, with tears in his eyes.

Su You quickly pulled him to sit down: "What's wrong with the mouse?"

The mouse said: "Xiaoyou, tomorrow, tomorrow I won't be able to come, wow..."

After saying that, I couldn't bear it anymore and started crying loudly.

Su You couldn't help asking: "Why? Are you going to visit relatives?"

Shi Wei was helping to clean the blackboard when she heard this and said: "The mice's grandparents won't let the mice come, saying it's useless to study!"

Su You asked Mouse: "Third brother really said that?"

The mouse said: "Well...my dad said that I always play here with you and eat and use your food. This is not good."

Su You said: "You eat what I have and use what I have, but you also help me cut the pig grass, cook the pig grass, and feed the pigs and chickens and ducks. It's not like you eat and use it for nothing."

The mouse said: "How can this be the same? My father said... He said he saw it when he went to the city. The white paper and the reading book you gave me are very expensive."

Su You smiled: "They are all home-made things. Selling them to others is more expensive. The cost is, in fact, that's it. I can provide this, so you don't have to worry."

The mouse continued: "My father also said... From now on, you will go to Beijing to take the master's exam. Once you become an official, you will never come back. If I become lazy and lazy, my life will be difficult in the future..."

These words hit the point, Su You couldn't help but frown, and after thinking for a long time, he said: "Xiao Mouse, do you want to study?"

The mouse cried again: "Of course I do, Xiaoyou. I have dreamed about it several times, sitting here listening to you tell stories and knowledge..."

Su You patted his back: "Shouba didn't come today. Is it the same situation at his place?"

The mouse said: "Yes, I was crying and making trouble to come. My mother told my father to let me come one more day."

Su You smiled and said: "Xiao Xiao, you are very good. If you have a problem, let us talk about it and we can find a solution together. Don't worry, I can't be the master of this matter, and your parents can't be the master. Even your grandparents,

You can’t make the decision either!”

Shi Wei asked: "Brother Xiaoyou, then who has the final say?"

Su You stood up and said, "Let's go! Aren't we children? Let's go to Ba Gong to file a complaint!"

…

Hachiko is cleaning the pig pen, twice every morning and evening.

According to Su You, the pigs should be killed in one month, so there is really no need to work so hard.

But Hachiko didn't think so. He said that if you raise them for a day, you should take care of them for a day. These two pigs are worthy of the family. They look so fat and happy to look at them!

Seeing the three children coming over, Hachiko put down what he was doing and said, "Hey, what's wrong with the mice? The boys don't want to cry!"

Su You was the first to attack: "Hachi! But you told me that all the children in Kelong must study!"

Hachigong said: "Ah, yes, that's right. I also said that I would talk to Mingyun about this matter after the new year, hire a gentleman or something, but how do you do science and engineering? I guess no one except you in Meishan City can understand..."

Su You said: "Let's not talk about that first. The mice have learned well, but their parents said they don't want them to come."

Hachigong put down the bucket: "You turned against them! Are you living a good life like crazy?! Xiaoyou, go ahead and ask the third and fifth sons to meet me at the ancestral hall!"

Su You smiled: "Hehehe, okay!"

Shi Wei shouted: "Brother Xiaoyou, wait for me, I'll go too!"

…

In winter, the farmhouse is busy, and the third brother and the third sister-in-law are turning mustard greens.

There are many kinds of mustard, and the current kind has long stems. Sister-in-law picked out the best ones, which reached halfway to the thighs, and removed the leaves, leaving only the stems.

The third brother took a knife to chop the vegetable leaves and prepared to mix them with chaff to feed the chickens: "Old lady, go get the eggshells and hammer them into pieces first. Youwa said that eggshells and clam shells are fed to the chickens. After eating the eggs, the shells are still hard!

"

The third sister-in-law said: "No, what Xiaoyou said is that you need oily pole vegetables. This child has done a lot for the villagers. There is nothing else at home. There are so many vegetables, I have to pick out better ones and send them over!"

The third brother was impatient: "Why don't we be busy for a while... Hey, Youba has been talking about it for a while, and Wei'er is here too? Where are our mice?"

Su You smiled and said, "Hey, this vegetable is growing really well! Did Sister-in-law keep the seeds? We will plant them again next year!"

The third sister-in-law said with a smile: "This dish has a bitter taste and is not as delicious as the wok. I don't know how much you want. Do you want to see if it is enough? If it is not enough, my sister-in-law will chop it for you!"

Su You smiled and said: "As much as you want, don't ask for it for nothing, just spend money to buy it!"

The third sister-in-law was not happy: "What is this kid talking about? How much can my brother eat?"
Chapter completed!