When Hu Jin County Order left, Hu Zhenbei blacksmith was inexplicably happy. Pen % fun % Pavilion www.biquge.info

He said proudly to Zhang Guoan: "Zhang Dalang, did you see that Hu Jin County Order nodding?" ”

Zhang Guoan shook his head and said, "I didn't see it." ”

Blacksmith Hu Zhenbei didn't care about Zhang Guoan's shake of his head, and then said proudly: "A certain is talented...... But no one appreciated it......"

“……”

"When I was a child, I traveled all over the countryside with my father and made countless clever iron pieces...... The most secret is a ......"

Zhang Guoan couldn't stand his narcissism anymore, and interrupted him and said: "You are so capable, why is the iron pipe made by Yang Qilang more round than the inner diameter you make?" If this happens again, I'm afraid we'll have to order it at his house in the future......"

Hu Zhenbei's blacksmith didn't blush at all at this time, and said, "There are a lot of them......

"No, I saw that the boss of Yang Qilang was making an iron pipe by himself......"

Hu Zhenbei's blacksmith's face was still not red at all, and said, "A certain is better at making short iron pipes......

Well, Zhang Guoan can only approve, and this guy will be able to make shorter iron pipes.

In the plan of the smugglers, they want to use the 30x3 angle steel on the tricycle of Zongshen to make a few firecrackers, of course, due to the material itself, the length of these firecrackers may be inconsistent, and the inner diameter may not be consistent, but the roundness of the inner diameter must also be there, and the straightness must also be there, these are the minimum requirements, right?

In the future, it will be made of wrought iron!

Even Zhang Guoan, a layman, can see it...... Obviously, this guy's ability to mill the barrel is insufficient, and the ability to wrap and beat with an iron rod is not good, Zhang Guoan regretted accepting this guy's entry into the gang a little.

However, it can only be said that he can still beat the angle steel into long slats, and add some materials to the original rivet holes on it to make it dense.

Zhang Guoan disliked him for being slow at the time, and went to Yang Qilang's blacksmith shop to make the same request, and as a result, after the people wrapped and beaten, they could still mill the inside of the barrel.

Of course, Yang Qilang's blacksmith shop has a lot of people, and when they are making round iron cylinders, they are three people working together.

They use the vertical milling drum method, in which the drill bit is pulled by a belt.

At that time, Boss Yang Qilang watched the guys work with his hands behind his back, and said to Zhang Guoan: "This is really good iron, it's a pity just to make a cylinder, it can be made into a treasure knife." ”

In their plan, they are going to try to make a firecracker, which is a firewire type with a simple structure.

Song Ziqiang had an explanation before leaving, asking them to use angle steel to make a fire cylinder first, try to make a few, and wait for themselves to come back to talk about the rest, to be honest, everyone is still not very worried about the level of the craftsmen of the ancients.

Zhang Guoan doesn't know much about machining technology, but he also knows the quality level of steel in this space-time space.

Before the Spring and Autumn Period, China's smelting technology was in a relatively primitive stage, and the smelting method used at that time was called "block smelting".

At that time, charcoal was used as fuel for ironmaking, and the heat was small, and the furnace body was small and the blower equipment was poor, so the furnace temperature was relatively low and could not reach the smelting temperature of iron, so the iron smelted was a sponge-like solid block, which was called "block ironmaking".

Block iron smelting is more time-consuming, the texture is relatively soft, contains many impurities, and it is forged into wrought iron that can be used.

In the process of forging block iron and wrought iron, people need to continuously and repeatedly heat, and the iron absorbs the carbon in the charcoal, improves the carbon content, and reduces the inclusions to become steel.

This steel has a compact structure and uniform carbon content, making it suitable for making weapons and knives.

In this way, it was further developed into the "100 steel" technology.

When people make utensils, they consciously increase the number of folding and forging, and a piece of steel often needs to be burned and burned, and repeated many times, or even hundreds of times, so it is called 100 steel.

The carbon content of 100 steel is more, the structure is more fine, and the composition is more uniform, so the quality of steel is improved, and it is mainly used to make knives and swords.

In the middle and late Western Han Dynasty, a new steelmaking technology "fried steel" appeared in China, which was a steelmaking technology developed on the basis of pig iron smelting and casting technology.

The pig iron is heated into a semi-liquid and liquid form, and then iron ore powder is added, and at the same time, a part of the carbon in the pig iron is removed by using the iron ore powder and oxygen in the air, so that the carbon content in the pig iron is reduced, the slag is removed, and the steel is directly obtained, which is the steel frying technology.

However, there are still certain defects in the technology of frying steel and 100 steelmaking, such as the process of frying steel is complex and not easy to master; Steelmaking is labor-intensive and time-consuming.

Around the end of the Eastern Han Dynasty, the steel-filling method appeared

Craftsmen select high-grade iron ore, smelt high-quality pig iron, and then pour liquid pig iron on wrought iron, and after several degrees of smelting, the iron is carburized into steel.

The steel-filling method is a remarkable achievement in ancient Chinese steelmaking technology. Compared with the 100 refining method or the frying method, pig iron, as a carburizing agent, accelerates the carburizing speed into wrought iron due to the high temperature after melting, shortens the smelting time and improves productivity.

Wrought iron becomes steel due to the penetration of carbon, and pig iron can also become steel due to decarburization, increasing the production of steel.

At high temperatures, carbon, silicon, manganese, etc. in liquid pig iron react with oxide inclusions in wrought iron to remove impurities, purify metal structure, and improve metal quality.

The steel filling method is easy to operate and easy to master.

If you want to obtain steel with different carbon contents, you only need to mix pig iron and wrought iron in a certain proportion and smelt them.

In short, the steelmaking technology developed in three steps in ancient China is absolutely ahead of the world in this time and space.

However, if compared with the steel on the Zongshen Zhengxiang three-wheeled motorcycle they brought, the level of the ancients is too much worse.

Whether it is hard steel or soft steel on the rear compartment, it is the result of industrialization, and the carbon content in it is controllable.

And the ancients in this time and space, no matter what method is used to refine the steel, carbon is uncontrollable, once there is a qualified carbon content of steel, it is the product of the earth-shattering, weeping ghosts and gods, and there is no way to repeat the refining at ordinary times, you need to try your luck.

Therefore, the ordinary medium-carbon angle steel of the world they are holding is absolutely good iron in the eyes of the craftsmen of the Great Song Dynasty.

Let's put it this way, just take a kitchen knife that you can buy with your real name in the supermarket, and you may beat 99% of the treasure knives of the Great Song Dynasty!

After arranging for them to make long and short iron cylinders, Zhang Guoan was responsible for solving the problem of black fire and medicine.

He wants to purify the purity of ** and sulfur, increase the mesh of carbon powder, and take a path of finishing granulation.

Black fire/ordnance has nothing to do with real explosives, but they can only choose to use it as a propellant for now.

In fact, the ancients also realized that the quality and purity of black fire/medicine are related, but they have not been able to find a good way to process it.

Of course, in this time and space, they haven't even mastered the best ratio, and looking at their level of fireworks, it can be regarded as a primary-level deflagration at most.

In the current time and space, the time and space smugglers inquired and found that Chonghua Town, near Laojun Mountain in Sichuan, was the place with the highest production of saltpeter in the Great Song Dynasty.

The Great Song Dynasty was the first country in the world to use thermal weapons, but because the quality of the black fire medicine was so poor, it simply did not meet the minimum energy requirement, that is, 70 liters of gas per gram, or more than 750 joules of energy.

So it can only be used as fireworks, in fact, of course, it has been used on the battlefield, and there are still a lot of black fire/medicine weapons.

But none of them achieved a decisive advantage!

Zhang Guoan obtained the highest purity of this time and space through the cooling crystallization method at different temperatures.

Then the purchased raw sulfur powder is heated, and when it reaches 200 degrees Celsius, the sulfur melts, filters out the substances that have not melted, and at the same time continues to heat, constantly stirring, so that some of the impurities in it vaporize and evaporate, and the sulfur boils at 400 degrees Celsius.

At this time, he used a porcelain jar to collect sulfur gas, and the sulfur gas began to cool down and solidify, so that he got a purer sulfur, which is probably the purest in this time and space.

As for crushing charcoal, he completely handed it over to the Song Dynasty technician students.

Zhang Guoan and his assistant Zhang Depei's behavior did not avoid those half-grown children.

They watched Professor Zhang and Zhang Depei busy going around, and from time to time they used industrial temperature meters to measure them, and they felt very curious.

Gu Jianshan didn't understand what he was doing until he received a request to grind five kilograms of charcoal powder.

But he wanted to obey the arrangement, so he worked hard, changing from the stone mortar to the copper mortar, and his face was full of black ash.

Zhang Guoan first put the sulfur and carbon powder together in proportion, and then asked Zhang Depei: "Have you written down all those temperatures?" ”

Zhang Depei smiled honestly and said, "I remember it firmly...... Hehe. ”

"This ratio of sulfur powder to charcoal powder has also been recorded?"

"Hehe, I made a note of it."

Zhang Guoan finally asked Zhang Depei to grind the ** crystals finely in a hardwood mortar, and then mix them according to a certain proportion.

After all this was done, Zhang Guoan began to granulate the black fire/medicine.

In fact, the principle of granulation is very simple, but the process is not very simple, it requires at least six processes and corresponding special equipment.

But they're just experimenting, and they don't care about the output.

One of the many benefits of black fire/drug granulation is that it prevents ingredient inhomogeneity.

Normal** Due to the relatively light mass of the toner during transportation, the toner floats up due to bumps, vibrations and other factors.

The second is that because it is polished by graphite powder, a smooth film will be formed on the surface of the particles, which is conducive to moisture-proof, and the moisture-proof effect is far better than the powder form.

The third is that it burns faster.

The ignition rate of the granular black fire/medicine is basically the same, the overall reaction is complete, and it can be constrained by the container together, so its deflagration power is stronger.

Zhang Guoan asked Zhang Depei to gently spray the black fire with water soaked in gluten, then mix it again, squeeze it into a cake shape with a wooden stake, and then put it in a dry place to dry naturally.

When it is completely dry, let him use a wooden hammer to crush it carefully, and then use a sieve to sift out two different mesh particles of black fire/medicine.

Finally, put it in a shaker bucket and shake it at a uniform speed with graphite powder.

Zhang Depei sweated profusely and said, "Professor Zhang, how long will it take to shake so?" ”

Zhang Guoan said: "About three hours, don't be afraid, wait for Guo Beyu to come back in the future, let him shake it specially, and you will have to guide them after you learn it." Can you remember the process? ”

Zhang Depei wiped his sweat and said happily: "Yes, yes!" ”

"From now on, this wooden house will be under your management......"

"Professor Zhang, it seems to be a little farther away from the other rooms...... Am I going to stay here at night too? ”

"If you're afraid, I'll let him accompany you when Bowie comes back......"

"Very good, very good, hehe......"

In the blink of an eye, it's New Year's Eve for them.

During this period, Zhang Guoan also asked Hu Zhenbei blacksmith to cast a few fire doors needed for arquebuses according to the drawings, and also made some dragon mouths for wrenching and clamping the fire rope, and drilled the fire ports on the gun.

Such a small job, Hu Zhenbei blacksmith is still easy to apply.

Finally, some carpenters' craftsmanship is simple, the butt and handle are relatively simple, as long as they are tight and fit the size of the iron piece.

Of course, they can also refine other functions, but there is no rush right now.

Zhang Guoan pulled the trigger on every arquebus, and felt that the action of the dragon's mouth hitting the powder pool on the fire door was still very flexible.