Vermilion Bird Avenue.

Liu Jun rode his horse towards the direction of the craftsmanship department.

The people who came towards him consciously retreated to both sides of the road and bowed to him one by one.

When they saw King Jing traveling, they wanted to hide away, but now they are no longer afraid. On the contrary, they are all sincerely respectful.

Sitting on the horse, Liu Jun kept nodding to the people, and he was used to such situations.

After the people in Wangjia Village came to the gate of the palace to thank him, the people spontaneously rushed to thank him one after another in the following days.

Moreover, not only the people of Jingyang City, but also the other four prefectures came. The gate of the royal palace was filled with people all day long.

According to the officials below, after the land was divided, the people in some places even removed Gao Hongyun during this period and forced the gentry to donate the land into a song and sang everywhere.

He was naturally very happy about this.

As King Jing, what else is more inspiring than the support of the people?

After all, since then, Jingzhou has really been like a hand-in-handed finger.

Soon, the group arrived at the craftsmanship department, and Liu Jun got off the horse and came to the yard.

As the saying goes, we must first settle the country when fighting against foreign countries.

Now all the hidden dangers within Jingzhou have been eradicated by him, and there are no more stumbling blocks on the road to development.

If he freed up his hands, he would naturally have to work wholeheartedly to strengthen himself, work with the whole nation to unite in the outside world, and take back the four foreign governments.

This half of Jingzhou's land is like a child leaving his mother, and it has been too long.

Of course, we will do our best to develop and unite to the outside world.

"Your Highness."

When Gong Ming learned that Liu Jun was coming, he came out to greet him in great detail.

Liu Jun walked straight into the yard and asked, "How is the blast furnace built these days? How much clay dry pot and iron has been burned?"

Since mastering the new iron and steelmaking technology, Gong Ming has carried out large-scale construction in the Craftsmanship Department as instructed by Liu Jun.

He said: "Back to your Highness, so far, fifty blast furnaces have been built in the yard of the Craftsmanship Department, and more than 3,000 clay crucibles have been fired. It was not until there was no more place in the Craftsmanship Department that the officer stopped."

Liu Jun nodded, steel is the foundation of all industries.

Now he dares not say that Jingzhou has the highest steel technology in the world, but it must be the highest in Jingzhou.

The steel produced in this method is definitely swaying to other places in terms of quality and quantity.

With such advantageous technology, he will naturally transform it into military strength.

After that, he would let the craftsmanship department make every effort to explode the steel production capacity and provide basic materials for farming equipment to muskets and cannons.

After all, after the land is divided, there must be a lot of farming tools, while the border troops in Jingzhou kept screaming for equipment.

As the two talked, they walked less than a hundred meters before they arrived at the temporary steel workshop in the craftsmanship department.

At this time, fifty blast furnaces lined up in a row, stretching for more than 100 meters.

Like the blast furnaces in the palace courtyard, there is a wind-heating furnace next to these fifty blast furnaces.

There are also pools in front of the blast furnace, which is where cast iron is turned into ripe iron.

At this time, the craftsmen of the Craftsmanship Department were busy, and the rolling iron was steaming, making the already hot weather even hotter.

The iron craftsmen were sweating like oil, and their faces were covered with carbon black.

"These fifty blast furnaces are now used to produce pig iron and half are used to produce cooked iron. The iron materials that have been produced are piled in the warehouse. When making steel, you only need to take them out and put them in a dry pot." Gong Ming pointed to a shed that passed by the blast furnace.

Liu Jun turned around and saw some craftsmen inside were busy.

He walked over and saw that the shed was filled with reduced versions of blast furnaces and wind-heating furnaces, which were about one meter high.

However, unlike blast furnaces, these furnaces do not fill, but clay crucibles sit.

Below, the craftsman uses a blower to burn the fire, while the craftsman above puts pig iron and cooked iron into a dry pot.

Because of the principle of blast furnace, the temperature in the crucible is sufficient to melt pig iron and cook iron.

After the two melted, the craftsman scooped out the impurities on it, finally lifted the crucible from the stove, and poured the molten steel inside into the mold below along a slope of porcelain clay burning paper.

After solidification, molded ingots appeared one by one.

Liu Jun was very satisfied with witnessing the complete iron and steelmaking process with his own eyes.

Although the yield of crucible steelmaking technology is low, this is relative to modern times.

In Rongchao, compared to the hundreds of steelmaking, it is a huge amount.

Besides, his steels are only used in agricultural tools and military aspects, neither paving railways nor building steel giant ships, which is more than enough to use.

"I have something extremely important to hand over to you this time." Liu Junliang put the drawing in his hand and "made artillery."

"artillery?"

Gong Ming was both surprised and happy. The method of forging the mesh rope gun had already opened his eyes.

He didn't expect that King Jing still mastered the method of casting artillery.

Although he was puzzled how King Jing had these technical drawings, he did not dare to ask.

Furthermore, this must be a secret, so it is better not to ask.

"After the Fuyu people occupied the four outer prefectures, they will definitely attack the four inner prefectures in the next step. There is not much time left for Jingzhou. Before they attack, the Craftsmanship Department must provide at least 300 artillery pieces for Jingshan Pass." Liu Jun looked serious.

If you cannot take back the four outer prefectures, Jingzhou will never be able to speak of its true rise.

"Even if the officials do not eat or drink, they will complete the tasks assigned by His Highness." When talking about Fuyu people, Gong Ming showed a similar expression to Liu Jun.

For Jingzhou, Fuyu Kingdom is a sword that is pressed against the chest.

Liu Jun clicked, walked to a stone table in the shed, spread the drawings, and asked, "Do you know the sand casting process?"

"This official knows." Gong Ming smiled proudly.

In front of Liu Jun, he finally didn't know anything.

"That's good." Liu Jun breathed a sigh of relief.

According to records, the earliest sand casting process came from the Song Dynasty, and contemporary Europe only mastered sand casting in the 15th century.

This is a method of using clay and sand to make molds, and it is very common to use.

Even in modern times, many molds still adopt this method of reverse molding, such as iron pots.

Now the method of casting a cannon he wants to teach Gong Ming is the method of casting a cannon by turning sand molding.

Originally, in the art of casting cannons, he first saw the iron mold casting cannon, but after measurement, he decided to abandon this method of making cannons that is both mod and multi-purpose.

Because although the iron mold casting method can be used in both shapes, it has a very obvious disadvantage.

That is, the cannons made of white tin.

But for pig iron cannons, the most ideal material is gray iron.

Although white tin and gray tin are both pig iron.

But tinplate is pig iron containing 2.5% carbon and less than one percent silicon.

The carbon content of tin tin and pig iron contains about 3% of silicon.

Because of its low iron content and high silicon content, gray tinplate has better ductility, and its shock absorption and cooling speed are much stronger than white tinplate.

This causes huge differences in performance between white iron cannons and gray iron cannons.

According to historical records, during the Opium War in Qing and Ying, the Guangdong Navy Admiral Guan Tianpei cast sixty new cannons in order to strengthen the defense of Humen, but ten cannons exploded on the spot during the trial release.

This is because the materials of the sixty cannons are all made of tin.

Because it is easier to explode, the amount of gunpowder filling of Qing army artillery cannons can only be reduced, which in turn causes artillery of the same caliber, and the power of the Qing army artillery is smaller.

In addition, the slow cooling of the white iron mouth greatly delayed the reloading speed, resulting in the British army often firing ten artillery during the war, while the Qing army often could only fire five or six artillery.

The disadvantages caused by the casting process can be seen in general.

Based on this, he decided to rather be a little troublesome than casting a gray iron cannon.

Instead of letting his soldiers die in frequent blowouts.
Chapter completed!