Datang Live Room

As for welding technology, it is actually not only available in modern times, but also in ancient times.

Even in ancient times, there was electric welding, can you believe it?

Ancient people did not understand electric current and electromagnetic phenomena, but they discovered some metal alloys that could conduct electricity, such as brass.

By heating these metals to searing temperatures, people can use these metals as electrodes to join other metals together.

This electric welding technology has been widely used in ancient Rome and ancient Greece.

But this time Yan Kai and the others used a combination of riveting and cold welding.

The edges of all the shell steel plates had been forged into thin sheets of about 4 mm when they were brought back to Kuoding County for heat treatment.

There are many small holes on it.

Take another steel plate and put the edges of the two pieces together to form another 8 mm thick steel plate.

And those small holes are aligned, and the rivets are passed through the small holes and fixed with the anchor heads.

Then it is burned and forged at high temperature, so that both ends of the rivets seal the holes and fit the steel plate tightly.

To this end, craftsmen in Kuoding County also built two biogas digesters next to the shipbuilding.

After the biogas is drawn out, a small tube made of sheep intestines is connected to a copper nozzle to form a movable fire-breathing device.

The combustion temperature of biogas can reach over 1800 degrees, which is very convenient for burning these rivets.

At the same time, cold welding technology is used in the two joined steel plates.

It is a plaster of tartaric acid plaster applied to two steel plates.

Tartaric acid is an organic acid, mainly obtained through the fermentation of tamarind seeds, mulberries and some fruits.

Everything else is easy to find, except for tamarind seeds, which Yan Kai had a hard time asking someone to buy from Yunnan.

This thing also has a name called tamarind. Now there is a tree named Maoduoli King Tamarind in Yunnan, which is over 1600 years old.

Yan Kai felt that the tamarind he bought this time might be the ancestor of Mao Duoli.

This paste creates an extremely strong connection between the two steel plates.

Then the two steel plates will be firmly brought together.

"Go to the north! Our ancestors are too strong!"

"Now I hear a slap in the face. I wonder if the faces of those in Northeast Asia hurt now!"

"The ancestors have told us that the method is more difficult than the method. It is actually possible to weld steel plates with the technology at that time!"

"Actually, there were quite a lot of welding techniques in ancient times, but being able to weld such a large steel plate should be the pinnacle of technology in this era."

In response to the ridicule from Chinese netizens, Bangzi and Rili felt their faces hurt, but they still refused to admit defeat.

"What's the use of welding? Don't you know how corrosive sea water is? If you put it in the sea like this, it will be rusted through in two or three months, right?"

“Don’t buy modern anti-rust paint if you can.”

There was no need to say anything about this, as Chinese netizens directly responded to them.

Then the two sides started arguing directly in the live broadcast room.

"It doesn't matter if you don't know anything, but if you don't know how to shout about it, it's your fault!"

"If our ancient ships had no anti-corrosion technology, how do you think Zheng He would have made his voyages to the West?"

"That's a wooden boat. Can it be the same as a metal boat?"

"What's wrong with metal? Don't you know that we have had bluing technology since the Han Dynasty?"

The quarrel between netizens on both sides was heated, but Yan Kai would only slap the facts in the face.

First of all, about 3% copper was added to this batch of steel when it was made.

This technique was not taught by Yan Kai, it was already known by the craftsmen of the Tang Dynasty.

This kind of craftsmanship is recorded in the "Lingwai Daida" of the Song Dynasty: "The iron workers in the capital and counties forge copper, and when they get mixed iron and iron, it will be the strongest. I believe that genius is a beautiful material."

Then there is the bluing technology that netizens mentioned.

In ancient Chinese literature, "iron color is green and intense", "frost-like", "qinggang" and "Zhan Zhan but black" all describe the blue surface after forging of steel.

The craftsmen of the Tang Dynasty had a special name for this, called "Magpie Green".

It is to bake the surface of the steel to form an oxide layer, so the bluing technology is also called dry oxidation method in modern times.

Tested according to modern conditions, the anti-rust performance of the baked blue oxide film is not inferior to that of the alkali oxidation film.

A steel sword unearthed from the Western Han Dynasty Tomb in Daishu, Laixi County, Shandong Province, is 108 centimeters long and is completely blue.

After 2000 years, there is still very little rust, and the blade is very sharp.

The last thing is anti-rust paint.

The putty is first mixed with tung oil and oyster ash, and has a strong bonding effect after repeated beating with a water-powered beater.

There is also a well-known common name called putty.

Scrape a layer on the steel plate first, and then apply the boiled show oil to complete it.

"Hahaha, the anchor finally used the show oil formula I provided!"

"Damn it, I'm also from Xiushan County, Yuzhou. I also have the formula for beauty oil. I missed the host's big red envelope of 30,000 yuan."

"This thing is to tell everyone to pay attention to the live broadcast room of the anchor at any time. Opportunities for you to make money may appear at any time!"

This Xiuyou Yankai was learned from netizens in the live broadcast room. The main raw material is an anti-corrosion paint made from tung oil.

It is anti-corrosion, anti-rust and resistant to acid and alkali, because the oil is slightly toxic.

Applying it to the bottom of the boat can also prevent the parasitism of seaweed and mussels.

For a few months, Yan Kai and the others just kept building the ship.

Silla sent a lot of ore, and most of it was thrown into this clipper ship.

Another part is to build weapons for the Dengzhou Army.

After all, all the old weapons were used to deceive the Silla people, so they had to replace them, right?

In the past few months, with the equipment support of Datang and Yuan Gaisuwen's deliberate efforts to let go.

When Silla and Baekje united, they were on par with Goryeo.

However, the weather is getting colder, and both sides have plans to call a truce.

Only Yeon Gaesumun still led troops to station on the border in order to prevent sneak attacks from the two countries.

"Yan Kai, can this boat be launched into the water?"

Li Anyan looked extremely excited as he looked at the flying shear boat, which took thousands of people from Kuoding County and took less than half a year to build.

This is because Yan Kai and the others had already made a lot of preparations before this, and the sails were made of fire-retardant canvas that Yan Kai bought from Hyundai.

Otherwise, it is estimated that it will take nearly a year for a ship to go to sea.

“Let’s try going into the sea!”

Whether it is a mule or a horse, you have to take it out for a walk before you know it.

Now the entire ship has not been equipped with weapons.

But if it’s just a sea trial, there will be no problem.

"But this ship hasn't been named yet, right?" Yan Kai looked at everyone, his eyes shining with excitement.

Li Anyan was shocked when he heard Yan Kai's words and started groping around on his body.

Then he took out a scroll and said, "I just received this, His Majesty's decree."

To be honest, he had never agreed with Li Shimin at this moment.

Yan Kai took it, looked at it, frowned and said, "Chang'an? Why! He didn't pay a penny and he took away the naming rights?"

Of course, Chang'an has also been paying attention to the progress of this ironclad ship.

Li Shimin was also afraid of Yan Kai. There was the Pipi Shrimp in front of him. What if he took out the Swimming Crab with one ship? How shameless would Datang be?

That's why this came out.

"You can also call it Chang'an!" Yan Kai licked his lips: "Write a letter for me, asking Your Majesty to pay the naming fee!"