Da Qin: At the age of six, I beat Qin Shihuang at the beginning

Chapter 190 The Key to Cast Iron Technology
What material is this mold made of?Why have I never seen it before?
Wei Yu was a little surprised.

Although Daqin also has the technology of integral casting and molding, the mold used is nothing more than clay.

This kind of clay is heavy, viscous, and very soft, and every time you want to cast a model, it is a big project.

Taking sword casting as an example, the most skilled craftsman needs at least three days to successfully cast a mold.

Even if the casting is successful, the mold cannot be used casually.After using it five or six times, there will be a slight deformation, and if it is used more than ten times, it will be completely out of shape.

And he looked at the mold in his hand. Although a sword had just been cast, there was no sign of deformation at all.

And what surprised him the most was that the weight of this thing was too light!
Such a mold is durable and lightweight, it is simply the perfect mold material!
As a Shaofu, Wei Yu is well-informed, but not only has he never seen the material of this kind of mold, he has never even seen the existence of similar records!
It seems that this material was born out of thin air and suddenly appeared in this world.

But... he didn't find anything strange. Didn't Qin Mu invent all kinds of things, such as imperial examinations, printing, and steelmaking, all appear without warning?

These things seem to have skipped 500 years of development out of thin air and came directly to this world.

Apart from feeling sorry for Qin Mu's mind, Wei Yu himself didn't know what words to use to describe his feelings.

Wei Yu only felt that his face was burning hot. Just now, he actually looked down on Qin Mu because of his pouring technique.

As a result, within a quarter of an hour, Qin Mu's technique made him feel a little unbelievable.

However, the shock Qin Mu gave him did not end.

After getting the long sword honed by the apprentice, he directly asked Li Hei to find a long sword made of hundreds of steel refiners and hand it to Dian Wei.

"Father, guess which of these two swords is stronger?"

Zu Long couldn't help laughing, Qin Mu asked this, how could he not know what it meant?
So he didn't answer at all, but instead looked at Wei Yu: "Wei Yu, in your opinion, which of these two swords is better?"

Wei Yu glanced at it, and the craftsman's spirit broke out instantly, and he ran to Dian Wei to observe carefully.

After a long time, he finally replied: "Your Majesty...Brother Zhao, although this cast steel sword looks sharp, it is actually like this for all one-piece swords."

"This kind of sword can be formed quickly, but it has to be said that there are more impurities inside, so the sword body is usually more brittle."

"And this kind of sword forged by hundreds of refining steels has undergone hundreds of times of hammering and forging, and the impurities have already been completely removed."

"Of course, Mr. Qin's question is obviously full of confidence in the sword cast in one piece. I would venture to guess that these two swords are about the same, but Baisteel is slightly better."

He didn't flatter or belittle it deliberately, but used his professional knowledge to analyze it before he came to the result.

For Wei Yu, he felt that he had given a high enough evaluation.

The advantage of pouring technology lies more in its convenience and operability.

As long as the mold is made and the iron slurry is smelted, even people who have never been in contact with related work can smoothly complete the work of casting swords.

Therefore, in the face of massive demand, casting swords is a very good choice.

It's just that there are advantages, and there must be disadvantages.

In his words just now, he has already made it very clear about the disadvantages of casting swords.The sword body is too brittle, has not been forged enough, and has insufficient toughness, so it is easy to break.

Qin Mu glanced at him and felt that this guy was different from the person his father brought back!

The ones brought by my father in the past, although they looked quite honest on the outside, but in actual communication, they were all smoother than loach.

Now this one, actually really thought about it for a long time, and even told Guo Chen what he was thinking...

Just... very straightforward...

Of course, the result is not correct.

Qin Mu didn't say much, he just gave Dian Wei a wink, Dian Wei understood, held a sword in each of his left and right hands, and struck suddenly.

After a loud sound of gold and iron, the result of the duel between the two swords finally came out.

Everyone looked at the cast iron sword first, after all, it was a new product that Qin Mu took out mysteriously.

At a glance, both Zu Long and Wei Yu were disappointed.

There was a hole in the cast iron sword in between.

That guy said it was not big, but he said it was not small.The most important thing is that it confirms what Wei Yu said, the cast iron sword has too many impurities and the sword body is too brittle, so it is not as good as [-]-made steel.

Qin Mu looked at them and couldn't help laughing.

"Father, don't be too busy to be disappointed, just look at the other sword."

Wei Yu shook his head and said, "It's a pity! It's a pity! If I didn't already have Baisteel, I would definitely be interested in this cast iron sword..."

But the next moment, with the shift of his eyes, Wei Yu was stunned.

At this moment, the hundred-refined steel sword was lying quietly on the ground, and there was a very obvious huge gap at its edge.

That opening is almost half the depth of the sword body!
This……

Wei Yu realized in an instant, the cut must have been made by that cast iron sword!

The Bailian steel sword was cut with such a big gap, but the cast iron sword was actually only broken with a small piece.

Which one is better or worse is already clear at a glance!
Wei Yu was completely excited, and he felt that the blood in his whole body was boiling.

He finally understood that his trip was really not in vain!

Among other things, this convenient and powerful cast iron sword production technology is enough!

He looked at Qin Mu expectantly: "Young Master Qin, this... the technique of casting iron swords..."

Qin Mu chuckled: "Father?"

Zulong smiled helplessly: "Okay! I'll give you all the land you want in Daijun!"

"Hahaha!" Qin Mu laughed loudly, "Dad, it's reliable!"

Zu Long also knocked on his head: "Okay, don't hold it in anymore, Wei Yu is about to go mad with epilepsy!"

Only then did Qin Mu smile and said, "Old Wei, this iron casting technology is actually not difficult. The key lies in making the temperature in the blast furnace high enough to remove those impurities."

He paused: "And to increase the temperature of the furnace, it is definitely not enough to rely on firewood and charcoal, coal must be used!"

"coal?"

Only then did Wei Yu remember that when he first entered the prison garden, he seemed to be instructed by Zulong to go under the blast furnace and see that strange fuel.

It turns out that this is the key to cast iron!
(End of this chapter)