Gao Pet didn't sleep all night, he forced himself to put himself on the shelf at the highest family meeting, and everything was not fully planned to start early, as Gu Tian's previous life, it was a phenomenon that had never been there. There is no composure of this nearly fifty-year-old soul at all.

There is also a set of lathe mother machine drawings that have not been drawn, Fu Bo has waited at the door, and the second uncle has also rushed over. Seeing the appearance of the second uncle, he didn't sleep well, and his eyes were painted with black circles.

Let them into the room, Gao Pet took out the list of materials and drawings, and said to Fu Bo: "This is the list of materials, Fu Bo you have to buy it in person, don't tell people what to do, especially a few are controlled materials, it may be difficult to buy." ”

Before Gao Pet finished speaking, the second uncle snatched the list, looked at it a few times and said to Gao Pet: "It's better for me to do this, like this gall, lianxi, and mercury are difficult to get." ”

"Second uncle, it's okay for you to go, there are more things about Fu Bo today, when you buy, buy more other things that are difficult to buy, and buy more if you can buy more of the things in the list."

"I know what's involved, don't worry, I'll go first."

Waiting for the second uncle to go out, Gao Pet said to Fu Bo: "This set is the wooden ox and flowing horse of Zhuge Kongming earlier, I have improved some aspects, I call it a wheelbarrow, this carriage and horse can be used, no matter what road can be used to transport goods, it is a very useful thing, if it is used in the military, it can save a lot of manpower." You ask the shipyard to do it, make a set to try first, and then mass produce it after there is no problem. ”

"There are also a few sets of drawings for bows and arrows, crossbows, bows and other key parts, you want to find a way to get you to the official's ordnance workshop, I have made it in the past two days, and I have put it aside separately. In addition, you take the wood parts to the shipyard to do, copper and iron parts you want to make a way, each to do three sets, there are two specific requirements, one is to rush out as quickly as possible, and the other is to ensure the best accuracy. When someone asks you what these things are, you don't know what I told you to do, so don't say anything. ”

There are a few things that the technology of the Song Dynasty cannot do, such as the torsion spring, spring, drill bit, etc. of the bed crossbow, involving modern technologies such as material selection and heat treatment.

"Dazhu, you go and call Gao Yang and Gao Fan over, ask Mr. Private for a leave, and I'll take them to the iron factory."

Tongling's iron factory was still a high-class iron factory, and the chisel gold tiger head gun that Gao Chong's grandfather gave him on Gao Chong's birthday last year was made here, and it took almost a month, so Director Li here was very polite to the people of the Gao family, and when he saw that Gao Chong was still with the second son and the third son, he was even more busy.

"Childe, if you have anything, just send a word, and ask you to come over in person." Director Li is very good at talking.

"That's not it, I mainly want to bring my two younger brothers to you to see and practice, they haven't been to the iron factory yet, and the second is that I'm really afraid that you won't be able to make my things."

"Oh, there's something we can't do, I'm going to see it."

"You see this spring, it is made of a thin wire, and it has to be very elastic when it is done. Pressing it can shrink into a ball, let go and return to its original state, have your people done it? ”

"You see this one is a drill bit, which is used to drill holes in iron and copper parts, and it must have a lot of hardness, and it can punch holes in iron and copper, and it must be able to withdraw the iron filings and copper filings that are punched out by itself. I don't think your people did. "It is true that in ancient times, it was a pointed cone that was punched back and forth, and it was okay to punch it on wood, but it was difficult to punch it on iron.

"For these two things, the selection of materials is very important, without the right materials, the corresponding hardness cannot be achieved, too hard, and difficult to process. You brought me the highest carbon content here, and I came to see if it was appropriate.

"Gao Yang, Gao Fan, I brought you here so that you can learn something here, you have to listen carefully, and ask if you don't understand."

Director Li brought some materials, didn't go away, eavesdropped on the side, and Gao Zhong ignored him. He said to his two younger brothers:

"You see the hardness of steel is related to the fact that there is something called carbon in the steel, and of course there are other things, but the main thing is this carbon. If there is no carbon or very little in the steel, this kind of steel is called wrought iron, it is very soft, and it is not very useful to make things. When there is too much carbon, this iron is brittle and can be cast by casting, but what is made can easily break or crack. To change it so that he has the appropriate strength, hardness or elasticity, there are two main methods of current technology: one is hammering, repeated hammering, I have heard a word, 100 refining into steel, that is what it means, according to the number of refining, there are 50 refining and 70 refining, many weapons engrave the number of refining on it, you go back and pay attention to it. Especially some good weapons. However, this method is aimed at those with more carbon content and less surface content, which can only allow him to appropriately increase strength and toughness. The other is to fry the steel, the carbon is more and the noodles inside are slowly burned off by copying, and the charcoal is added when the carbon is less, so that the iron contains noodles to a certain requirement. It's what I saw on the road ahead where the molten iron and steel were splashed. So how to judge the carbon content, we can't see how much is in the molten iron, this requires experience, so the master's experience is very precious. We don't know, they know at a glance. No one can make a precise estimate by a simple method, but a rough estimate is also very simple. ”

"Master Li, please find some leftovers" When Gao Pet said, the masters stopped to listen, and when they heard that Gao Pet asked for leftovers, they immediately sent it over. I took a piece of material and grinded it on a hand grinder, and there were dark red sparks.

"You see, this is a piece of wrought iron, or very little carbon, and when there is more carbon, it will emit bright white sparks" Take a piece of steel that Director Li brought earlier and grind it again.

"Have you seen it, this is the steel with a higher carbon content that Director Li brought before, are there any bright white sparks bursting out one after another? The same is true when looking at molten steel. Steel with different carbon stocks has different uses. "Pick out a piece of high-carbon steel and give it to Director Li.

"Master Li, you asked people to divide this piece of steel into two pieces, one into wire, and the other into a pattern, and put it on a carbon furnace without bellows for an hour after it was beaten. Then place it on the sand and let it cool. ”

"Every requirement mentioned by my brother is purposeful, the carbon content of the steel determines the properties of the steel, but it can also be changed through other treatments, which is called heat treatment." One morning, in the process of production, the two younger brothers were taught a popularization class on steel and heat treatment, although these are basic, they are definitely the top technology in the Song Dynasty. Director Li and the masters in the factory also benefited a lot. Very welcoming. Money was also confiscated for several parts.

Back at home, Gao Chong sent his younger brother back to dinner, and asked them to come back in the afternoon and return to the yard by themselves.

The second uncle has come back and bought several cars of things. There are materials and utensils. The car was parked in the yard, and the things had been unloaded, and several things such as nitrate, alkali, sulfur, and gallium were packed in wooden barrels. A person was drinking tea in the living room, and Xiao Cui was talking. Seeing Gao Pet come back, he greeted him.

"Darling, I heard Xiaocui say that you went to the iron factory?"

"Went and hit a few parts. The second uncle has worked hard. ”

"I'm nothing, you see if there's anything missing or buying the wrong one. I'm going to make it up. Gao Pet looked at the list.

"Everything is ready, let's do it in the afternoon."

"Then let's go to dinner together." The second uncle saw that the matter was over, and he also said to Gao Pet during dinner.

When I arrived at my mother's place, the two little ghosts were excited when their hands and faces were cleaned, and they chattered endlessly with the old lady, and their worship of the boss rose to a new height.

The dishes at noon were very rich, and I poured a bowl of wine for the second uncle. Aunt Zhang desperately put vegetables into Gao Pet's bowl. During the meal, the second uncle talked about a trivial matter when buying things, and the Yang family in Dongcheng desperately inquired about what the Gao family was going to do, and what important things the second brother of the Gao family wanted to do in person, and he also sent two boys to follow several places.

"Darling, in the morning, I have asked people to vacate the west courtyard for you to toss, there are few people there, I have let people guard it, and ordinary people are not allowed to approach. In the morning, you took your two younger brothers out, and they have come back to say that you are doing a good job, and you have worked hard to bring them in the past two days, so that they can learn for a long time. But where the danger is you have to beware. Yang'er, Fan'er, you have to listen to your brother's words, don't be naughty. ”

Let the subordinates move the things in the courtyard to the west courtyard. The two younger brothers had arrived. The west courtyard is very large, it seems that he also wants to open a workshop, the second uncle said, originally wanted to make wine here, but later because he could not do business, the winery moved to Gaocun, so it was empty.

"In the afternoon, we mainly did two things, one was to make gunpowder, and the other was to make copper. This is a top-secret technology, unless absolutely reliable people can't come in, the two younger brothers are only allowed to see and ask, can't move, and can't hear clearly? Dazhu's task is to take care of the second and third brothers, and they will run around and drive them out immediately. Do you hear that? ”

"Second Uncle go and check if there are any idlers." Gao Pet arranged the same orders, and several people were also very obedient, even the second uncle was like a small worker.

After moving nitrate and sulfur, the color is not very good, and the charcoal has to be freshly ground, so I will bring a few of them over.

"Second uncle, the color of these nitrate, sulfur, and alkali is not very good, and it is probably like this on the market, and the effect of doing so will be greatly affected. But it's not that it can't be used, and the explosive power made is worse. The second and third brothers should pay attention to the fact that the purity of the item sometimes has a great impact on the finished product, which should be kept in mind. Today we will not do purification, the method of purification will be taught to you next time. I'll start with this black powder. This black powder has been invented by someone in the court, but due to the formula, materials and other reasons, the effect is poor and there is not much application. Because few people have studied it, in fact, this gunpowder is very useful. As you know, when we open mines, we are all manually smashed out with a pickaxe, and if we can blow up the big stones, it will save a lot of effort and reduce costs. If it is used to fight a war, make a bomb and explode in the enemy's formation, and a radius of more than ten steps is not dead but wounded, then can this battle not be won? It can be said that this is a great invention, a thing that changes the times. Except for a few of you, no one in the family can say, Gao Yang, Gao Fan, Dazhu, whoever you let arrest can't be said even if you are killed. This is not a matter of whether you die or live alone, but a matter of the life and death of tens of millions of people, and the survival of the country. Let you know that it is because you are living and dying with this family, and you should not regret it, if you don't have this determination, you can just walk out of this door. No one will laugh at you. And do not say to the outside world that you know. Got it. Hearing Gao Chong's serious words, everyone's faces were grim.

"The ratio of black powder is 6:1:1, or 75:15:10, and the explosion force in front is worse, but the combustion speed is faster. To increase the explosive power, the amount of sulfur can be appropriately increased, and the amount of nitrate should be appropriately increased to burn faster. Those that burn quickly are called propellants, and those with strong explosive power are called explosives. They have different uses, and you will understand it when you are exposed to it later. There is also a kind of explanation called triggering WuXi to do it the day after tomorrow. ”

"Black powder is the most afraid of moisture, and when it is wet, its power decreases, and it does not even explode. It is also the most afraid of fire, and it will explode when it meets fire. The raw materials are agglomerated and should be dried. But not with an open flame. Gao Zhong explained while mixing gunpowder, made several gunpowder, the proportions were different, some also added stones or small pieces of iron, and made a few long fire ropes or fuses, and finally took paper to make five double cannon battles. Originally, they were going to smelt the copper and then go to the gunpowder test, but these people couldn't wait to see the effect of the gunpowder, and asked Gao Pet to take them out for the test.

When I arrived in Gao Village, I asked people to collect wooden targets for experiments, and the second uncle also let me lead a few sheep. Set up the shooting range and teach them a few test essentials. Gao Pet lit the first black powder explosion of the fire rope, ran to the safety zone, waited for more than ten breaths, only to hear a loud "boom" explode. The test worked well, and a sheep at ten paces fell to the ground and died, charred and fleshy, and a broken wooden target. Fifteen paces away, the lamb has several blood holes on its body, barking non-stop, and the wooden target is crooked. Tested artillery battles, too powerful and unsafe. Explosives packs with ironstone are much more lethal.

The Zhuang household in Gao Village was talking about the test, although he didn't know the specific situation, but he was guessing and talking, and when the people who were interested knew about it, it was also a troublesome matter, and the second uncle rushed over and gave a gag order.

In the evening, Gao Pet reported the situation of the afternoon to his mother, and Gao Pet's alarm bell in the afternoon had an effect, and the two younger brothers, no matter how their mother asked, refused to say, and ate quietly.