Riding and chopping: Overlord of the Han and Hungarians

Chapter 339 338. Gun body
heat.

There was heat in the air.

Orange-red color is the main color of this area.

"The furnace is on!"

The blacksmiths shouted loudly as usual to alert others in the same area.

The hot liquid flowing from the liquid outlet of the blast furnace is even more red.

The iron hook is wrapped in thick fur.

Several blacksmiths worked hard at the same time to adjust the angle of the liquid outlet, so that the scalding hot liquid poured into a funnel.

slow.

slow.

The smiths endured the scorching heat.

They have long been used to this temperature.

The funnel-connected mold is gradually filled with hot liquid.

In addition to the funnel used to receive the hot liquid, there are two small funnels on both sides of the mold.

The mold was square and lying on the ground. The blacksmiths poured water from the funnels on both sides of the mold. The water pipes already left in the mold continued to cool the mold from the inside out.

In addition to the water in the mold for heat conduction cooling, the blacksmiths are also heating the mold.

To ensure that the carbon element in the hot liquid is continuously precipitated.

Hollow casting casting method.

Zhang Qi adopted the cannon casting method after experimenting with a group of scholars in the world of riding and cutting for a long time.

During the period, I also experimented with the lost wax method and the clay mold and iron mold method. The advantages of each are different, and the disadvantages are also obvious.

The clay mold method depends too much on the material of the mold. Once the clay pound used to cast the mold is not in place, the cast gun body will have flaws and become a defective product.

Moreover, the clay mold method is one shot at a time, and it needs to be replaced once it is used. The time cost is extremely high. Zhang Qi and the others have tried to make clay molds, and they usually wait for one to two months to dry in the shade.

The iron mold method is very easy to use, one mold can be used repeatedly, and the cannon mold made by the iron mold method can also reduce the workload of cleaning the surface of the cannon body and washing the inner chamber.

In the beginning, Zhang Qi and the others mostly used the iron mold method to make the cannon body, but later found that the iron mold method also has great shortcomings.

Just a little bit of excessive heat dissipation will add a lot of work to the casting cannon.

The lost wax method is to pour wax liquid on the basis of the clay mold, which has the advantage of high precision, but has the same disadvantages as the clay mold, and even has temperature requirements for use.

That's right, the casting of cannons has already started. Zhang Qi took the time to go to the world of cavalry and hacking every day to study with a group of scholars. It only took half a year in the world of cavalry and hacking to complete the casting and test firing of bronze cannons and iron cannons.

Now, outside iron smelters have also started to try casting cannons through the technology brought by Zhang Qi.

Different from the clay mold and iron mold used in the early stage of the world of riding and cutting, the outside iron smelter has used hollow casting molds from the beginning.

This is the crystallization of the wisdom of a group of riding and hacking scholars. Compared with the clay mold and iron mold, the hollow casting technology almost absorbs the advantages of both, and discards most of the shortcomings.

Of course, the iron mold casting method was still taught to many blacksmiths. In fact, the iron mold technology has precedents in the Warring States Period. Auxiliary means of bronze casting.

Secondly, the iron mold casting method is also easy to use in emergency production during wartime. It is faster and less costly than hollow casting technology.

So after going back and forth, Zhang Qi simply asked the blacksmiths to learn hollow casting technology and iron mold casting technology at the same time.

Time passed little by little.

While the mold of the hollow casting is cooled by water from the inside, it is also heated outside to precipitate the carbon element in the hot liquid.

It wasn't until the craftsmen in charge of these two tasks stopped working that the hollow casting mold was dragged aside, waiting to be opened tomorrow.

There are eight or nine other molds placed together with this mold. Nowadays, Liaodi is considered to be a big business. Of course, mold manufacturing is done in one go.

However, there is no demonstration of the results yet. Once it is confirmed that five of the ten gun bodies can be used, then the hollow casting technology will be considered successful and can be mass-produced.

afternoon a few days later.

Zhang Qi of the city lord's office received the news from Shanhai Iron Smelter, and was told that the mold could be opened, and the castings were almost cooled.

After receiving the notice, Zhang Qi naturally went there immediately, and Hu Ling also followed. As the city lord of the front-line city, she also needs to have a general understanding of the weapons that will be used on a large scale in the future.

When Zhang Qi and the others came to the iron smelting factory outside Shanhai City by horse, the iron smiths had already carried ten molds to the concrete space outside the site.

Since Zhang Qi, the blacksmiths who were busy beside the moulds saluted and greeted him one after another.

"I've been waiting to see Your Majesty!"

"Free gift,"

Zhang Qi walked a few steps closer to him. Although the test firing of the cannons in the world of riding and cutting went well, independent production from the outside world is the kingly way, so he also attaches great importance to these molds.

"Let's open the mold."

"okay!"

A group of blacksmiths had been preparing for a long time, when Zhang Qi said, they opened the ten molds one by one.

The temperature is still a little warm, but it is no longer hot.

The craftsmen took out the cannon body in the center, and the surface was smooth without any grooves.

Zhang Qi looked at these metal cannons that shimmered in the sun and nodded involuntarily.

"Yes, look at the barrel and clean it."

It was still a little troublesome to clean the barrel. The bodyguards took off two manuscripts from the horse's back, opened them, and put them behind Zhang Qi and Hu Ling.

The two were not polite, and went straight down to wait.

After spending some time, the blacksmiths cleaned out the barrels of ten cannons. The central mold made of fine plaster made the barrels very smooth.

Although there must be slight bumps, this can be resolved in subsequent fine washing.

Moreover, this level is enough for smoothbore guns.

Zhang Qi took a cannon body from several craftsmen. Although it was heavy, it was still within the controllable range of his strength.

This is just the cannon body. Iron casting itself is lighter than copper casting. At first Zhang Qi also thought about direct steel casting, but considering the difficulty of finishing after steel casting, he still chose iron casting.

Putting one end carefully on the ground, Zhang Qi pointed the other end at himself to check.

not bad.

The parameter requirements are all in line with Zhang Qi's portable caliper.

The cannons used to practice the blacksmith's craft are of light weight.

The thickness of the gun wall is about three centimeters, the bore is no more than ten centimeters in diameter, and the diameter is one hundred millimeters.

Zhang Qi stretched out a finger and fumbled around inside the boring hole for a while, but did not feel any obvious irritation.

"Haha, yes, you have worked hard, and your craftsmanship can be called a master craftsman."

Zhang Qi stood up with a smile, and praised all the blacksmiths,

Then he turned his head to Hu Ling and asked.

"Bonuses will be given to all employees of the Shanhai City Iron Smelting Plant. Those employees who did not participate will receive two white dragons each, and the participating master craftsmen will receive thirty bonuses each."

"it is good."

Hu Ling nodded in response.

(End of this chapter)