Since the emergence of the graphite crucible, it is possible to directly burn ore into molten iron and pour it out as refined iron ingots. If you are lazy, you can cast it directly. If you are more demanding, it can be forged and shaped again.

Nowadays, such a large furnace can produce a furnace of molten iron in one day. Even a well-forged sword can produce hundreds of knives. Compared with before, the speed is much faster. The key is that it is needed

Most of the people were missing.

In the past, it took more than a hundred people and three days to make a hundred barrier knives and refine iron ingots; to make weapons from iron ingots, it took another fifty apprentices and two days, and finally it was completed by craftsmen, which took another twenty

It takes one craftsman two days. Therefore, it takes more than two hundred to three hundred people and seven days to turn iron ore into weapons, plus auxiliary personnel.

This is still the most ideal situation, such as rework, mistakes, and refining waste. These situations will definitely happen every time. Therefore, if a hundred obstacle knives are really produced, it will take three hundred people and ten days to complete it.

If you use a small crucible to cast it, you can produce hundreds of knives a day, as long as the crucible is enough.

As the bellows continued to move in and out, the flames of the stove became more intense and roared upwards. Zou Yu didn't wait long before red liquid slowly flowed out of a fist-sized hole under the stove.

"It's so fast! The speed has increased by at least 30%!" Rutong Yuwen looked at the hourglass on the side and said in surprise.

Before the iron juice could cool down, someone brought a crucible over and put the iron juice in. Then another crucible was brought over and the two liquids were mixed together.

This is the alloy method that Zou Yu came up with. Iron ore and pain have different melting points, so they must be refined separately? Then mixed together? Heated again.

"Not bad, not bad? Compared to when we started refining weapons in Liaodong? The speed has increased several times." Zou Yu praised with satisfaction.

"Shilang Yan proposed to build two small compartments next to the stove to guide the hot air from the stove into the room, and then let the bellows send the hot air into the stove.

In this way, no cool air will enter the furnace? It should also increase the temperature in the furnace!" Yuwen Rutong said.

"This method is good. You can try it. Even if it doesn't work, there is no loss? If it succeeds? That is another great discovery." After turning around the stove and thinking for a while, Zou Yu nodded in agreement.

road.

"The lower official thought the same thing, so he was renovating it!"

Regarding the healthy competition between Yuwen Rutong and the others, Zou Yu is happy to see the results. After all, without competition, there will be no progress. He also tries his best to satisfy their requirements.

Nowadays, various technologies have been greatly improved on the original basis. This is the best proof. Zou Yu is happiest when he grabs technical talents in the original Daxing City.

As the iron juice comes out of the furnace, the craftsmen begin to pour them into the mold. After all, this is a new smelting method. It is necessary to test the performance of the weapons made by this smelting method in all aspects and whether they are better than the previous ones.

Because it was just to test whether the smelted iron liquid reached the level of steel, there was no alloying involved, and it was just forged into a knife.

"Have you ever considered using other things to quench?" Zou Yu asked with a raised eyebrow as he watched the blacksmith insert his knife into a bucket of liquid to quench.

"Lord Hui, as for quenching, after countless generations of exploration, oil mixed with water is the best. Although it is better to use animal blood, it is only done when refining sophisticated weapons.

Folk craftsmen usually use pure water or directly insert it into the ground." Yuwen Rutong explained.

After a pause, Yuwen Rutong continued with a slight hesitation: "Actually, the key to quenching is not the material, but the control of temperature; the weapon must be red, so that the entire weapon can be quenched from the inside to the outside. When there is still a trace of quenching inside,

When there is a fire, it must be taken out immediately.

Because it has been quenched, the entire weapon is relatively brittle."

This should be a secret of the Yuwen family. Zou Yu nodded to express his understanding. Presumably, if it was just a quenching material, the ancients must have tested it.

"Quenching and cooling are two key procedures. The key to quenching is temperature control; and the key to cooling is water! The water quality must be clear, and the water temperature cannot be too low. If the water temperature is too low, the weapon will also become fragile. The water temperature cannot

It's high. If it's high, it cools down slowly and makes the weapon softer." Rutong Yuwen continued to explain.

"Okay! I'll give it a try when I get the chance!" Zou Yu nodded and said.

Zou Yu still wanted to get a stick for himself this time. With his current strength, it was too light to take advantage of, and the knife was too bulky. Spears and horse spears required relatively high skills; and the hammer was relatively short, so it was better to use it.

The stick fits.

This time he planned to use the double sticks he was most accustomed to, which were made of a mixture of fine steel and fine copper. They had both hardness and willfulness, and could unlock more... No, they could use more moves.

"Oh! When I think of sticks, why do I think of the two tough people in my family? I must have been holding it in for too long." Zou Yu was thinking wildly while waiting for the iron juice to come out.

Although now well-cast weapons are hammered using a waterwheel driven by a hammer, Zou Yu still likes to do it himself, because even if the waterwheel is driven by a set of gears, the speed is still not fast enough.

After the iron juice and copper juice are mixed and smelted, pour it into the prepared mold, and lay two one-meter-long red sticks there.

While waiting, Zou Yu had his arms bare and put a cowhide apron on his chest. The stick was slightly cooled and formed, so he lifted the mold, poured the stick on the iron felt, and picked up a nearby one about fifty kilometers long.

Then he struck down with a hammer as big as a head.

"Dang!" was heard, and sparks flew everywhere.

"Dang! Dang Dang! Dang Dang Dang!" From slow to fast, hammer after hammer was struck. As sparks flew, some debris fell to the side. They were impurities in the stick.

Zou Yu focused on tapping and kept tapping back and forth. The stick with a thick arm slowly became smaller and longer.

The sound of beating continued until the stick was almost cooled down, and then it was thrown into the charcoal fire for heating. Heating made it easier to beat. After all, the cooled stick was not forged by human power alone.

This repeated beating continued for ten times. When it got dark, the stick lying on the iron felt had turned into a wrist-thick, one-meter-five-meter-long stick with a slight black and purple color, which looked very heavy.

Zou Yu weighed it and found that the weight of the sticks was about 160 kilograms. Two sticks weighed more than 300 kilograms. They were just right for fighting.
Chapter completed!