Daming: I, the emperor who trains the carpenter

Chapter 18 The happy dog ​​emperor like a child!
Afterwards, Zhang Haogu began to give orders.

Put this steel ingot directly on the anvil for hammering for hardness test.

Normally cast steel ingots are very hard, and there will be no dents after hammering. Therefore, it is necessary to cover them with a clay mixture specially containing iron filings or powdered iron ore to strengthen the decarburization of steel ingots.

Things, Zhang Haogu is ready.

However, this requires reheating the steel ingot to a fiery red color of about 700 to 900 degrees Celsius before hammering it.

This heat treatment process is repeated until the metal is soft enough to be forged.

The difficulty lies in how to control the steel ingot between 700 degrees Celsius and 900 degrees Celsius.

This temperature is a very important key.

There is no temperature testing machine in this era, so you can only rely on experience, use your eyes to see the color of the fire, and forge it when it reaches dark red.

The temperature should not be too high, a temperature rise above 900 degrees Celsius will reverse the process and cause the carbon to melt, and if the temperature is lower than 700 degrees Celsius, the steel cannot be fully tempered.

Therefore, this is a technical activity that requires controlled heat treatment and mild tempering of the ingot, covered with clay, including iron filings or powdered iron ore, to decarburize the surface of the ingot.In addition, oxidation also produces the same effect.The carbon content of the steel ingot gradually decreases.

In this way, it is possible to change from the state of white cast iron to carbon steel.This process may also be referred to as annealing and spheroidizing.

The steel bar becomes malleable and resilient.

Under the guidance of Zhang Haogu.

At the same time, let a book boy beside him start to record it in detail.

"This time, we are relatively successful, but it doesn't mean we will succeed every time, so every detail must be recorded!"

Zhang Haogu glanced at the book boy beside him and said, "Don't just use our colloquial language and record it in detail, every process must be recorded!!"

book boy frowning
Zhang Haogu brought a pen and paper, grabbed a charcoal pencil and began to write by hand.

"This is data. For example, it took a few sticks of incense and a few cups of tea. You have to learn to do statistics well. The more detailed the data, the better. We will make steel in the future, and you need more detailed records!"

"And there's this..."

In the previous life, he also did a lot of test experiments.

What data needs to be recorded, these are all clear.

While making gestures, Zhang Haogu pointed to the little eunuch beside him.

His palm was pitch black, and he washed it in clean water casually.

The book boy on one side is already a little sluggish.

Zhu Youxiao was a little curious: "Brother Zhang, we are making steel, we just need to master the method, why bother?"

"That's different!" Zhang Haogu waved his hand, and said slowly, "Brother Zhu, let me ask you, do you just want to be a clockwork frog? Or do you want to be a wooden cow or a horse? An iron car that can travel thousands of miles a day?"

"This……"

Zhu Youxiao was stunned, then nodded and said: "Of course I want to make wooden cows and horses, as well as the iron carts that travel thousands of miles a day. I really want to try it too!"

"That's it!" Zhang Haogu shrugged and said slowly: "This experimental data needs to be recorded. We always need to find the fastest, simplest and most convenient way to produce the steel we need. dont you agree?"

Zhu Youxiao thought about it for a while, and it really made sense.

How to save money is the kingly way.

What's more, others don't know, but Zhu Youxiao is still very clear that the Ming Dynasty's tax revenue for one year is really stretched.

If you want to satisfy your personal hobbies, you always have to find a way to save some money.

……

……

The blacksmith named Wang Chengwu forged the steel that Zhang Haogu needed bit by bit.

Although, it is not as good as the industrial civilization of later generations.

However, it is more than enough to drive a clockwork frog.

Afterwards, Zhang Haogu began to twist the small piece of steel in his hand little by little.

Little by little, very patiently made a small clockwork.

I have to say that the technology of this era is indeed not in place, and it is still very laborious to create what you need.

However, this is the first step,

If the mainspring can be made, the spring is not a problem.

If the spring is developed, the cannon with a longer range can be fixed, and even the musket can still be improved.

It can only be said that this is a small step, but the future is a giant leap.

Of course, this requires fooling, and fooling the carpenter emperor into throwing money into it little by little.

"Brother Zhang, can this thing really work?" Zhu Youxiao couldn't help becoming nervous.

"Okay, you'll know in a while!"

Zhang Haogu laughed, and stretched out his hand to Zhu Youxiao: "Give me the toad!"

"This is a toad!" Zhu Youxiao muttered.

"It's all the same!" Zhang Haogu laughed, and took over the removal of the agarwood carving from Zhu Youxiao's hand, and then began to assemble them one by one, carefully installing the spring on it.

Zhu Youxiao stared at the toad in front of him.

There are not many parts of this toad.

It is also very easy to assemble.

This thing is actually not too complicated. After all, it is a clockwork frog. As long as the core clockwork is done, other things are easy to do.

After assembling it, Zhu Youxiao also felt that his breathing was about to stop.

Then, Zhang Haogu handed the eradication to Zhu Youxiao: "Brother Zhu, you have been busy for this matter, come on, you wind up this clockwork!"

"Is it really possible?"

Zhu Youxiao took a deep breath, and then took it.

Start winding up.

Then, Zhu Youxiao stared at the frog in front of him.

Then, I saw the frog jump up.

Hahaha!
Zhu Youxiao danced and danced, as if he had gotten a toy.

He always liked carpentry. At this moment, he has developed a carpentry job that can move by himself. The sense of accomplishment in his heart cannot be described with words.

After all, from the beginning to the end, this all contains my own hard work.

"Brother Zhang!"

Zhu Youxiao looked at Zhang Haogu excitedly: "Before you told me that you can make wood move by itself, I still didn't believe it, but now, I really believe it. It turns out that there are really wooden cows and horses in this world. If this The mainspring is big enough, it can really drive iron carts, drive wooden oxen and horses to walk!"

Zhang Haogu smiled, and said slowly: "Brother Zhu, it's easy to talk about wooden cows and horses, but if you want to drive an iron cart, you need more than just a clockwork!"

Zhu Youxiao was curious: "What else!"

"This involves a lot of knowledge!" Zhang Haogu laughed inscrutablely.

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(End of this chapter)