If you say a thousand words, the first element in making cannons is the cannon body.

This cannon body is not shaped by watering.

First of all, you have to use good cooked iron or bronze to make the cannon body, so that the cannon body can be strong and durable.

If there are too many impurities inside and you can't use them for a few dozen or a hundred times, you will have to burst all of them. Not only will it be useless, it will also hurt your own people.

Even if you add dozens of tightening hoops outside, it won't work.

Then the inside of the cannon body must be smooth and smooth, so that the inside will not be bumpy, which will greatly affect the firing distance of the cannon body and the use time of the cannon body.

Even so, the cannon body must be maintained every once in a while, and then take it back and continue to use the turning knife to smooth the chamber wall, so that the wear and tear in the battle can be restored.

This requires that the gun wall must be thick and very purity of cracked iron or bronze.

This is not a problem for Liu Mingqi.

Refining more refined purity cooked iron can be done by using relatively simple methods.

Not to mention anything else, hasn’t the civilized steelmaking happened in the past 1950s and 60 years?

In fact, this idea and step are correct, but the key is that most people do not have this experience and have no skilled means, so they have made a lot of scrap steel.

I heard that in that era, the bronze statues in temples suffered disasters, and even those precious ancient cultural relics did not escape.

For example, the famous Xuande Furnace of the Ming Dynasty was destroyed in this incident, and from then on, there were basically no real products.

Speaking of steel making, it was not so backward in ancient times.

For example, during the Spring and Autumn Period and Warring States Period in my country, the swords of the kings who were excavated reached the level of medium carbon steel.

This is an amazing thing!

Many people don’t know that steel is actually roughly divided into three types: low carbon steel, medium carbon steel, and high carbon steel.

Among them, low carbon steel is called mild steel and has special uses. Because high carbon steel is too hard, it is usually made of drill bits and reamers... Oh, by the way, there are a lot of uses on machine tools.

The one we usually come into contact with the most is medium carbon steel.

For example, cars, ships, weapons, etc., as well as various daily buildings, household appliances, parts, steel products, etc., all use medium carbon steel.

So more than two thousand years ago, our ancestors had already made cold weapons of medium carbon steel, which was a miracle.

Unfortunately, this technique is not produced through technical and standardized production, but is created by some superb craftsmen and some chances.

Cannot copy.

Not being able to copy means that it is a sign of whether a technology is successful.

In addition to this accident, ancient people have been pursuing steel making and have developed effective methods such as steel filling and steel frying.

The ancients did not understand modern knowledge and did not have the concept of carbon content.

The main basis for distinguishing pig iron and marinated iron is its performance. Those with hard and brittle are "raw", those with forging are "cooked", and those with strong nature are "steel".

Because the ancient stir-frying process was carried out in a semi-liquid state, it was difficult to separate slag and iron, and the product often contained more inclusions. Therefore, even if the carbon content is high, it can only be called "fried iron" because it is not rigid in nature.

In fact, the biggest difficulty here is to remove the impurities after the melting of iron ore.

Includes various elements in the molten iron.

But it is very simple to point it out, that is, to oxidize these impurities and get rid of the molten iron.

In the end, medium-carbon steel can be obtained by reaching a carbon content of about 0.25%-0.65%.

Yes.

You read that right, what Liu Mingqi has to do now is to go over bronze and cooked iron and directly use medium carbon steel to cast the cannon body.

This not only has better stability, but also makes it less likely to explode, but also makes it lighter and makes it more durable.

Don't underestimate the change in the material of this cast cannon.

Its impact on the entire weapon is a revolution that is directly updated.

The transformation from iron to steel is no less than an industrial revolution.

Now Liu Mingqi has a surging sense of mission.

This time, it is also my turn to take the lead again!

After all, we will be far ahead in the research and application of this steel!

...

A few days ago, after seconding a group of blacksmith masters, Liu Mingqi handed over the "steel stir-frying method" and "steel filling method" he had sorted out to them.

There are also ways to increase air circulation and make the combustion temperature higher.

In fact, it is also very easy. Just use a large leather drum to blow air in a semi-sealed environment.

It was the kind of skin drum used to burn stoves in commune canteens in rural areas in the 1950s and 1960s.

Its method is not complicated. It can be done directly by using the principles of air flow, squeezing and compression, and sealing air.

Liu Mingqi asked Chi Saner to tell them that they would use their own methods to make a batch of steel.

Today, Liu Mingqi came over to see how they were doing.

When he sat in the carriage from afar, he could see thick black smoke rising from the steel workshop.

If it is closer, there will be an unpleasant smell in the air.

On the one hand, it is the smell of coal burning.

On the other hand, it is also the smell of various harmful substances floating out.

Fortunately, it is a little remote here and there is no farmland around the surrounding area, so there is no need to worry about contaminating the fields.

In this era, fields are the most sacred things. Even the emperor advocated cherishing fields and it was impossible to trample on fields.

Of course, this level of steelmaking cannot reach the point of polluting the entire area.

It was just a little affected.

"Your Highness!"

When he saw Liu Mingqi coming, the head of the embroidered guard who had just been transferred here came to greet him.

When building this experimental base, Liu Mingqi just said to Gao Jing, "This is an important place comparable to a wooden grenade workshop." Gao Jing quickly sent a team of 100 people to guard it.

In addition, the Imperial Court Office also launched a large-scale uninterrupted patrol in the neighborhood.

The nearest imperial guard camp is only more than twenty miles away. Once something happens, thousands of imperial guards will rush over to rescue.

Therefore, you can feel at ease in terms of safety.

After Liu Mingqi patted the head of the embroidered guard on the shoulder, she turned around and asked Ding Zhuo who was also driven out at the same time, and said, "How is the situation inside?"

Ding Zhuo is one of the old guards in Prince Yu's Mansion.

When he was sweeping over the group of human traffickers in Xiqiu Village, he was among the guards who were guarding Liu Mingqi.

Because he suffered a lot of injuries at that time, he has gradually changed to becoming an administrative officer in the mansion recently.

Because he had the merit of savior, he had become the supervisor in just a few seconds and was directly sent to manage this very important experimental workshop.

"Hey, your highness, stop talking!" Ding Zhuo said with a slutty brow: "This group of stubborn guys was not very happy at first, and thought you were messing around. What was the result? After the first furnace of steel was made, they were all stunned! They were all shouting like crazy people! Haha!!"

Liu Mingqi smiled, but she didn't care.

Blacksmiths are also technical otakus of this era. They are most interested in and proud of their profession.

Suddenly I met a person who had nothing before, and transferred them here, then pointed at them and told them what to do. Do you think they would be convinced?

If it weren't for the fact that he was an imperial prince or a saint who defended Dakang, they might have started to quit.

The best way to deal with such people is to bring out real things and impress them in the fields they are good at, and this will be done once and for all!

While speaking, they had already walked into the wall.

These walls are actually still under renovation. According to Liu Mingqi's requirements, at least a wall of more than five meters must be built, and it must be thick. In addition, the area must be large and cover an area of ​​more than 100 acres, so that more steelmaking furnaces and workplaces can be accommodated in the future.

The configurations required by some professional steelmaking furnaces are also being continuously improved.

It includes a series of blast furnaces built, as well as several large and small furnaces transported from the Ministry of Internal Affairs.

A few days ago, the blacksmiths completed the first furnace of steel here.

They were now surrounding a small steel stove, a tough shirtless young man stirring the red-hot iron inside with an iron paddle.

Below is someone using a skin drum to stimulate the air.

Everyone's faces were full of smiles and amazement.

When they saw Ding Zhuo and the head of the embroidered guard coming with a young man, they didn't care and were still talking about themselves.

"Master Li, Master Yan, Master Fang..." Ding Zhuo greeted them, "Come on, don't you want to see Your Highness? He is here now!"

"ah?"

Only then did a group of people feel energetic and gathered around.

"Your Highness, can you tell me why using such a leather drum can greatly reduce impurities?"
To be continued...