Sui and Tang Dynasties: My Wife is the Eldest Grandson Wugou

Just after shouting, a burly, shirtless middle-aged bearded man lifted the curtain of the back room and came out.

Opening his mouth, a rough voice suddenly came out: "Who is it?"

Ye Fan was speechless for a while, I didn't know, I thought you were a bandit!

"I."

Ye Fan chuckled, then walked over directly: "I'm here to talk to you about a big deal, I wonder if you're interested?"

"You, you are..."

Seeing Ye Fan, the shopkeeper suddenly showed a doubtful expression, and then looked at it carefully, and instantly opened his eyes wide: "You are——"

"Shh!"

Ye Fan immediately silenced his voice: "Shut up."

"Good good."

The burly man suddenly showed an expression of honor, and immediately made a gesture of invitation: "Please, please, let's talk in the room!"

Chapter 192 Destroy a country for a piece of steel

?

Ye Fan nodded, and then walked in directly.

Shan Yingying followed closely behind.

After entering the back room, the strong man closed the door, rubbed his hands, and said excitedly: "Ye, General Ye, it's really an honor for you to visit my little place!"

"what's your name?"

Ye Fan asked with a smile.

"My name is Zhu Tiedan, and everyone calls me bold."

Zhu Tiedan smiled honestly.

"Bold, I don't have any other intentions here this time. I just want to talk to you about a business, a big business."

With that said, Ye Fan took out a small self-made spring.

This small spring is a compressed spring model that Ye Fan twisted out with a thin iron rod when he was on the boat, and it does not have elasticity.

For a blacksmith, it is enough to clarify these concepts for him. After he understands it, he can create it.

So when Ye Fan came this time, he just wanted Zhu Tiedan to help him research how to use the resources and technology of this era to create a compression spring that can be installed under sofas and soft mattresses.

This is the most critical thing, as long as there is a compression spring, then Ye Fan can run smoothly on the road of making sofas and soft mattresses.

After handing the compression spring model to Zhu Tiedan, Zhu Tiedan held it in his hand and began to examine it curiously.

Afterwards, Ye Fan explained to him the working principle of the compression spring, trying to be as clear as possible.

Zhu Tiedan's blacksmith's business is so good, and he himself has more than [-] years of blacksmithing experience, so he can quickly understand what Ye Fan said.

After listening to Ye Fan's explanation, Zhu Tiedan shook his head helplessly:

"It's true that I can make it, but Master Ye, if you want to make iron tools with this kind of craftsmanship, you must have elastic steel. We don't have such technology at present in Da Sui..."

After finishing speaking, Zhu Tiedan sighed: "As far as I know, it seems that Goguryeo already has such technology, but the relationship between Goguryeo and our country is currently very tense. I'm afraid it will be difficult to obtain such technology for a while."

"Goguryeo already exists?"

Ye Fan was slightly taken aback, and then asked, "Are you sure?"

"I'm sure. I went to Goguryeo three years ago. There was a blacksmith's shop in Yangping City, which only sold steel and iron, never any iron tools. I bought some steel from there, including some elastic steel."

With that said, Zhu Tiedan pulled out a broken sack from under the bed.

After opening the torn sack, inside was a small piece of rusty steel, which seemed to be of average purity.

But in this era, such elastic steel is already very advanced.

Ye Fan took this piece of elastic steel in his hand and felt it briefly.

The weight is also heavy, which shows that the carbon content of this piece of steel is relatively high. Although it is steel, it is actually not fully formed steel, half iron and half steel.

It is more appropriate to say that it is elastic steel than wrought iron.

Originally, Ye Fan thought that Goguryeo was so powerful that it could even be made of pure steel.

At first, he thought it was strange, if Goguryeo really had the technology to smelt steel, I am afraid that the Sui Dynasty would have been wiped out by them long ago.

Now it seems that I really think too much.

But even wrought iron is barely usable.

At least the toughness and elasticity are much stronger than pig iron.

This is just a craftsman who met a dead mouse and accidentally touched a little bit of steel smelting technology, not even entry-level steel.

"Bold, can you mass-build this type of elastic steel?"

Ye Fan asked expectantly.

"cannot……"

Zhu Tiedan was also very honest, and replied honestly: "I have tried several times, but I still can't reach this purity."