hot.
The air was filled with heat.
Orange-red color is the main color in 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 blast furnace outlet looks even redder.
The iron hook is wrapped in thick fur.
Several blacksmiths worked hard at the same time to adjust the angle of the liquid outlet, causing the hot liquid to pour into a funnel.
slow.
slow.
The blacksmiths endured the scorching heat.
They have long been accustomed to this temperature.
The mold connected by the funnel is gradually filled with hot liquid.
In addition to the funnel used to receive 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 thermal cooling with water in the mold, the blacksmiths are also heating the mold.
To ensure that the carbon element in the hydrothermal fluid is continuously precipitated.
Hollow casting casting method.
Zhang Qi adopted the cannon-casting method after experimenting with a group of scholars for a long time in the world of riding and slashing.
During this period, we also tried the lost wax method and the clay mold and iron mold method, each with its own advantages and obvious disadvantages.
The clay mold method depends too much on the mold material. Once the clay used to cast the mold is not pounded in place, the cast gun body will have defects and become a defective product.
Moreover, the clay mold method requires one mold to be replaced after one use, which is extremely time-consuming. Zhang Qi and his colleagues have tried making clay molds and often wait for one to two months for them to dry in the shade.
The iron mold method is very easy to use, and one mold can be reused. Moreover, the gun mold made by the iron mold method can also reduce the workload of cleaning the surface of the gun body and washing the inner bore.
At first, Zhang Qi and others mostly used the iron mold method to make the gun body, but later they discovered that the iron mold method also had 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. Its advantage is that it has high precision, but its disadvantage is the same as that of the clay mold, and it even has temperature requirements for use.
That's right, cannon casting has already begun. Zhang Qi took the time to go to the Cavalry and Cutting World every day to study with a group of scholars. It only took almost half a year in the Cavalry and Cutting World to complete the casting and test firing of the bronze and iron cannons.
Now, outside iron smelting plants have also begun to try to cast cannons through the technology brought by Zhang Qi.
Different from the clay molds and iron molds used in the early stages of the world, outside iron smelting plants used hollow casting molds from the beginning.
This is the crystallization of the wisdom of a group of riding and cutting scholars. Compared with clay molds and iron molds, hollow casting technology absorbs almost the advantages of both and eliminates most of the shortcomings.
Of course, the iron mold casting method was still taught to many blacksmiths. As for the iron mold technology, there was actually a precedent in the Warring States Period. Most of the blacksmiths knew it. However, at that time, the iron molds were just iron molds and were used to serve. Auxiliary means for bronze casting.
Secondly, the iron mold casting method is also useful for emergency production during wartime. It is faster and cheaper than the hollow casting technology.
So Zhang Qi simply asked the blacksmiths to learn hollow casting technology and iron mold cannon casting technology at the same time.
Time passes little by little.
The mold of the hollow casting is cooled from the inside by water and heated from the outside to precipitate the carbon element in the hot liquid.
It was not until the craftsmen responsible for these two tasks stopped working that the hollow casting molds were 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.
It's just that there is no result display yet. Once it is confirmed that five of the ten gun bodies can be used, then this hollow casting technology will be considered successful and can be produced on a large scale.
A few days later in the afternoon.
Zhang Qi from the city lord's office received news from the Shanhai Iron Smelting Plant and was told that the molds could be opened and the castings had almost cooled down.
After receiving the notice, Zhang Qi naturally went there immediately, and Hu Ling also followed. As the city lord of the frontline city, she also had to have a general understanding of the weapons that would be used on a large scale in the future.
By the time Zhang Qi and others rode horses to the iron smelting plant outside Shanhai City, the blacksmiths had already carried ten molds to the cement open space outside the site.
Since Zhang Qi, the blacksmiths who were busy around the molds saluted and greeted him one after another.
"I've been waiting to see you, Your Majesty!"
"No gift,"
Zhang Qi quickly walked a few steps closer. Although the test firing of the cannon of Qi Qi World went smoothly, independent production by outside parties is the way to go, so he also attaches great importance to these molds.
"Let's open the mold."
"okay!"
The blacksmiths had been preparing for a long time. At this time, Zhang Qiyi said that 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."
Cleaning the barrel of the cannon was still a bit troublesome. The personal guards took off two mats from the horse, opened them, and placed them behind Zhang Qi and Hu Ling.
The two of them were not polite and went straight 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 are definitely slight bulges, these can be resolved with subsequent fine lathe washing.
Moreover, this level is enough for smoothbore guns.
Zhang Qi took over a cannon body from several craftsmen. Although it was heavy, it was still within the controllable range of his power.
This is just the gun body. Iron casting itself is lighter than copper casting. At first, Zhang Qi also thought about directly steel casting, but considering the difficulty of fine repair after steel casting, he 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 all met with the caliper Zhang Qi carried with him.
These cannons, used to practice the blacksmith's craft, were lightweight.
The thickness of the cannon wall is about three centimeters, and the diameter of the boring hole is only ten centimeters and the caliber 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."
Zhang Qi stood up with a smile and praised the blacksmiths.
Then he turned his head and told Hu Ling.
"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."
"good."
Hu Ling nodded in response.
(End of chapter)
