Since the appearance of graphite crucibles, the ore can be directly burned into molten iron, poured out is a fine iron ingot, lazy can be cast directly, and the requirements are higher and forged again.

Now this kind of big furnace can produce a furnace of molten iron in one day, and even if it is a well-forged barrier knife, it can make a hundred and ten handles. Compared to before, I don't know how much faster it is. The point is that there are more than half the people who need it.

In the past, it took more than 100 people three days to make a hundred obstacle knives and refine refined iron ingots; It took another twenty apprentices two days to make a weapon out of iron ingots, and finally it was completed by a craftsman, which took another twenty craftsmen two days. Therefore, it will take more than two hundred and three hundred people for seven days to turn iron ore into weapons, plus auxiliary personnel.

This is still the most ideal situation, such as rework, mistakes, refining waste, these conditions will definitely occur every time, so it is really a hundred obstacles, and it takes three hundred people and ten days to make it.

With a small crucible casting, you can produce dozens of hundred and eight obstacles a day, as long as the crucible is enough.

As the bellows continued to enter and exit, the flames of the furnace became more and more violent, whirring upward. Zou Yu didn't wait long, and there was a fist-sized hole under the stove, and there was a red liquid, which slowly flowed out.

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

Before the iron could cool, someone came over with a crucible and filled it with the iron. Then another crucible was lifted, mixing the two liquids together.

This is the alloy method that Zou Yu came up with, iron ore and pain melting point are different, so they must be refined separately, then mixed together, and heated again.

"Yes, yes, compared to when we started refining weapons in Liaodong, the speed has increased several times." Zou Yu exclaimed with satisfaction.

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

In this way, there is no cool air entering the furnace, and the temperature inside the furnace should be raised a bit! Yuwen Rutong said.

"It's a good idea, you can give it a try, even if it doesn't work, there's no loss, and if it succeeds, it's another great discovery." After turning around the stove and thinking for a while, Zou Yu nodded in agreement.

"Xia Guan thinks the same way, so people are rebuilding!"

For Yuwen Rutong's healthy competition, Zou Yu is happy to see it, after all, without competition, there will be no progress, and their requirements are also met as much as possible.

Nowadays, all technologies have been greatly improved on the basis of the original, which is the best proof that Zou Yu is happiest is that in the original Daxing City, he has grabbed technical talents.

As the iron juice came out, the craftsmen began to pour them into the mold, after all, this was a new smelting method, and it was necessary to test how well the weapons made by this smelting method performed in all aspects, and whether they were better than the previous ones.

Because it is only to test whether the smelted iron juice reaches the level of steel, it is not alloyed, but it is forged into a knife.

"Have you ever considered quenching with something else?" Watching the blacksmith insert the knife into a barrel of liquid quenching, Zou Yu asked with a raised brow.

"Lord Hui, quenched things, after countless generations of exploration, the oil with water is the best; It's better to use animal blood, but that's only when you're refining a good weapon.

Folk craftsmen generally use clear water, or they are directly inserted into the ground. Yuwen Rutong explained.

After a pause and a little hesitation, Yuwen Rutong continued: "In fact, 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 out, and when there is still a glimmer of fire inside, it must be removed immediately.

Because after quenching, the whole weapon is relatively brittle. ”

This should be a secret of the Yuwen family, Zou Yu nodded in understanding. Come to think of it, if it was just a quenching material, the ancients must have experimented with it.

"Quenching and cooling are two key procedures, and the key to quenching lies in temperature control; And the key to cooling is water! The water should be clear, the water temperature should not be too low, too low will also make the weapon vulnerable. The water temperature should not be high, as it cools slowly and softens the weapon. Yuwen Rutong continued to explain.

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

Zou Yu still wanted to give himself a stick this time, with his current strength, he didn't take advantage of it, and the size of the knife was too large, and the spear and horse lance were relatively high in skill requirements; The hammer is relatively short, so it is still suitable for sticks.

This time he still plans to use the most accustomed double stick, a mixture of steel and refined copper, which has both hardness and willfulness, and can unlock more... No, there are more moves that can be used.

"Alas! Thinking of sticks, how can I think of the two people in the family who are tough, is it because they have been holding back for too long. While waiting for the iron juice to come out, Zou Yu thought nonsense.

Although the well-forged weapons are now beaten with a waterwheel and 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 and copper were mixed and smelted, they were poured into the prepared mold, and two one-meter-long red sticks lay there.

While waiting, Zou Yu put a cowhide on his chest with his bare arms, and the stick cooled down slightly, so he lifted the mold, poured the stick on top of the iron felt, and picked up a hammer about fifty centimeters long and the size of a human head next to him, and knocked it down.

"Dang!" sparks flew around.

"When! Dangdang! Dangdang! "From slow to fast, hammer after hammer, as the sparks flew around, some debris fell to the side, which was the impurity in the stick.

Zou Yu focused on beating, constantly knocking back and forth, and the stick with thick arms slowly became smaller and longer.

The sound of the beating continued incessantly, and only when the stick had almost cooled down was thrown into the charcoal fire to heat it up. Heating is easy to beat, after all, the cooled stick is purely human, and there is no way to forge it.

This repeated beating continued ten times, and by the time it got dark, the stick lying on the iron felt had become a wrist-thick, one-meter-and-five-meter-long, slightly black-purple stick, which looked very heavy.

Zou Yu weighed it, the weight of the stick was about one hundred and sixty catties, and the two were more than three hundred catties, which was just right for fighting.

With two waves of his hand, Zou Yu put down the stick, and the rest of the work was left to those skilled craftsmen, who had the means to make an interface for the stick and carve lines on the surface of the stick.

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