After five years of teaching support, Daming became an empire on which the sun never sets.

Chapter 168 Demonstration of the God Machine Gun

"The second is to use rifling technology or smoothbore technology. The rifling is also called the windmill line, which is engraved inside the barrel and is divided into two types: Yin line and Yang line. Its function is to give the bullet the ability to rotate, which can ensure the accurate head after the bullet is shot out of the barrel. ."

"Rifled guns are suitable for long-range sniping and can kill people from hundreds of meters away. Fire guns use iron pellets to fire, but they are not suitable for rifled and smoothbore. Smoothbore is suitable for shotguns."

"Why, are you also interested in this?" Qin Yu asked after the explanation.

"Too interested," said the crowd.

"Okay, everyone go back to the classroom, and I'll draw it for you." Qin Yu said.

I understand their obsession with firearms, it seems to be in the nature of boys.

"In addition, I will give you another course on blast furnace ironmaking and steelmaking. Anyway, blast furnace ironmaking is also a required course in chemistry."

He quickly walked into the classroom with the crowd, and Qin Yu first drew a picture of a blast furnace for the students.

"Modern blast furnace ironmaking is developed and improved on the ancient shaft furnace ironmaking method.

Its main body is the blast furnace, and the blast furnace body is divided into five parts from top to bottom: the throat, the body, the waist, the belly, and the hearth…”

Just to improve and develop?In other words, our Daming's iron-making method only needs to be improved to become the blast furnace iron-making that Mr. said?The crowd thought excitedly: This is too convenient.

"The throat of the furnace is divided into small hoppers, small bells, large hoppers and large bells, etc. It is the place where the raw materials are poured..." Because there are pictures and facts, it is extremely easy for people to understand when they are studying.

"The ironmaking process is to transfer iron-containing raw materials - sinter, pellets or iron ore, fuel - coke, pulverized coal, etc., and other auxiliary raw materials - limestone, dolomite, manganese ore, etc., from the blast furnace in a certain proportion. The top of the furnace is loaded into the blast furnace...the process is called charging."

"And from the hot blast furnace at the lower part of the blast furnace, hot air is blown into the blast furnace to help the coke burn - this process is called heating."

"The carbon in the coke is combusted with the oxygen bubbling into the air at high temperature, producing carbon monoxide and hydrogen.

Raw materials and fuels decline with the progress of smelting in the furnace. When the charge falls and the rising gas meets, heat transfer, reduction, melting, and decarbonization occur successively to generate pig iron—this process is called smelting. "

"The smelted pig iron comes out of the discharge port. The pig iron is hard, wear-resistant, and has good castability, but it is too brittle, so it needs to be refined into steel.",

"The reason why pig iron is too brittle is because there is too much carbon in it. Steelmaking is to reduce the carbon content in pig iron, eliminate P, S, O, N and other harmful elements, and retain or increase Si, Mn, Ni, Cr and other beneficial elements. elements, and adjust the proportions between them for optimal performance..."

After Qin Yu finished speaking, he explained the general process of steelmaking to the students again.

The students studied very seriously, because there were too many knowledge points in this class, and the crowd was afraid that they would not be able to understand or remember for the time being, so they recorded every sentence Qin Yu said and every picture he drew. on the notebook.

……

It's another weekend, and the students are going home for vacation.

Xu Da came to the home of a hunter in the village.

"It turned out to be Teacher Xu." Orion Lu Dabiao said.Xu Da is now a physical education teacher at Lujia Village Primary School. Because the villagers respect Qin Yu, they also respect the people around him.

"Sell me the fire gun made by Mr. Qin." Xu Da said.

"Sell it to you?" Lu Dabiao hesitated. After all, this thing was very useful, and even tigers and leopards were beaten to death. He was unwilling to easily transfect it.

"I'll give you five taels of silver." Xu Da said.

"Alright then." Lu Dabiao said, immediately handing over the fire gun.Although the modified gun is very useful, it is difficult to obtain gunpowder and iron pills in Lujia Village, and its value is far less than five taels of silver.

After Xu Da bought the modified gun, he handed it over to Zhu Biao: "Report to the prince, the matter has been completed. Please go back to the prince, and be sure to ask the emperor to cast a large number of them and use them in the army."

"Mr. Qin transformed gunpowder and fire guns into muskets. Although his original intention was to hunt hunters. But if such a good thing is not used in the army, it is simply a waste of life."

"I know." Zhu Biao said.

"In addition, the conditions in Lujia Village are poor, and there is no way to make a better one. The conditions outside are much better than those in the village." Xu Da said, "Therefore, many aspects of this gun can be improved. If it is made of iron, it will be more stable and durable.”

"Well, um." Zhu Biao said, "I will tell the father and emperor about this."

……

Ying Tianfu.

The Imperial Palace, the open space outside Fengtian Hall.

The emperor and all the civil and military ministers gathered together.

"Biao'er, you asked us and the minister of civil and military affairs to go outside the hall. What's the important thing?" Zhu Yuanzhang asked Zhu Biao with loving eyes.

In fact, he has always been very satisfied with this prince, but he has rarely shown it before.

Zhu Biao's request, he almost never did not meet.

"My son wants to show one thing to the father and the other ministers." Zhu Biao said.

After speaking, he took out a modified gun from behind him.

"What is this?" Zhu Yuanzhang asked, and when he took a closer look, he realized that he seemed to recognize it. Isn't this just fixing the fire gun on the wooden frame?
Looking more closely, it seems that it is very different from the traditional fire gun. For example, a lot of accessories have been added to the wooden handle.

"The prince showed us the fire gun." A minister whispered.

"The fire gun has already been equipped in our Ming army."

"However, the disadvantage is that it is troublesome to set fire, and the power is not enough."

The ministers also recognized it, and kept pointing and talking in a low voice.

"Biao'er, you want to show everyone what's so special about this fire gun?" Zhu Yuanzhang asked.

"Your Majesty, this is not an ordinary fire gun. It's Mr. Qin's improved gun." Zhu Biao said, "The gun was called a fire gun in the Song Dynasty, and then changed its name to a fire gun. Mr. Qin seems to prefer calling him a gun."

"Is it Mr. Qin's improved gun?" Zhu Yuanzhang's face showed joy, but he was still a little skeptical. "It's just an improvement. There shouldn't be much difference, right?"

"Your Majesty, the firearm has developed from the burst gun of the Song Dynasty to the current fire gun, and its power has not changed much in the past few hundred years. Therefore, I feel that even if Mr. Qin made some changes on it, it would not be much. changes." Li Shan said long.

"That's right. It's impossible to make the fire gun more powerful." Hu Weiyong said.

"That Mr. Qin is only a little more knowledgeable, and the improvement of firearms requires extremely skilled craftsmen of the Armament Bureau." Another minister said, "He is just a private school gentleman, and he has never been in contact with ordnance. What big changes can be made?"

(End of this chapter)