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Gu Zhenhua weighed the waist knife in his hand, picked up a piece of wood from the side, and threw it in the air. The cold light flashed, and Mu Fang was cut into two pieces at once, and the knife edge was brushed together, and there was no problem at all with cutting off the head.

Master Ge said with a smile: "Grandpa Guo, we have made a total of three specifications, the one you hold in your hand is for the infantry, the cavalry uses a greater curvature, and the blade is strengthened a lot, which is convenient for slashing on the horse." In addition, it is used by the firecrackers, which is relatively shorter and lighter. ”

Gu Zhenhua nodded: "Yes, it's really good, how is the output, can you keep up?" ”

"There is no problem with the spear, especially the riding gun, as long as it is enough to use it once, and it is not good to use iron, according to your method, there is no problem with contracting to the merchant, we will finally accept it and check it. The knife is more troublesome, it must be made with good iron, and it must be made repeatedly by experienced craftsmen. ”

"Isn't there enough artisans now?"

"Enough, but good steel is not enough!" Master Ge said helplessly: "We have built three iron-making furnaces, and a lot of iron has been smelted, but the quality is not good, and the slightly better ones still have to keep the fire-making guns." Therefore, only three hundred waist knives were built, which was not enough to equip a battalion. ”

When Master Ge said this, he was also a little ashamed, "Grandpa Guo, what do we want, the salary you gave is so high, you have lifted us all to the sky, and we are still unable to produce in large quantities, which is really ashamed." ”

"It doesn't have to be this way." Gu Zhenhua said with a smile: "It's just been a few months since I arrived in Henan, and no one can reach the sky in one step, just find a way to solve the problem." Take me to see the production of firecrackers first. Then go to the ironworks. ”

Master Ge led Gu Zhenhua to the weapons factory, and the firearm has always been very important to Gu Zhenhua, so the number of craftsmen here is the largest. Also the busiest. Don't look at Gu Zhenhua personally to inspect, most people still have to do what they should do, and they will only reply when asked.

Speaking of making a gun, the most difficult thing is to drill out a smooth and even barrel, in fact, even in later generations, it is not easy to do things such as barrels, let alone the Ming Dynasty. It was all about drilling a barrel out of it by hand. It will take about a month.

Gu Zhenhua also knew that it was difficult to make guns, so he was willing to take a risk and abduct the fire gun from the capital. However, after several major battles, coupled with the loss of usual training, many firecrackers have reached their lifespan, and the gap in firecrackers is actually very large. This is also before a large-scale march. Problems that must be properly addressed.

In front of Gu Zhenhua, there were several groups of craftsmen drilling the barrel, they used a simple manpower drilling machine, first using hardwood to make a solid shelf, and then fixing the barrel rough, using a round stone disc as an inertia wheel, tying a leather strip and pulling it with manpower, so that the stone disc drove the drill bit to rotate the drill chamber. This kind of drilling machine is a lot more advanced than just using manpower. But Rao is like this, and the degree is not going anywhere.

Between words. It happened that the barrels of the guns had been drilled one by one, and the craftsmen and masters sent them over like treasures. Gu Zhenhua first stroked it, it was very smooth, and then squinted his eyes and looked at the barrel.

"Yes, it's straight."

"Thank you Grandpa Guo for the compliment." The middle-aged craftsman said with a smile: "In the past, when I made fire guns for the imperial court, I had to get by, iron was bluffed, and the guns were bluffed. ”

"In the end, the lives of the soldiers were all lost." Gu Zhenhua sighed and said: "Weapons are related to victory and defeat, and victory or defeat is related to the rise and fall of a country, so you can't be careless." ”

"What Grandpa Guo said is that after arriving in An**, no one dares to do things without care, and all the guns drilled out must be engraved with our names, and if there is a problem in the future, it will be investigated."

Master Ge also smiled and introduced: "Grandpa Guo, according to your intentions, every part of the fire gun must leave the mark of the maker, and if there is a problem, it must be investigated to the individual." Of course, if you do it well, you will also be rewarded! ”

"Well, that's good, the rewards and punishments are strict, so that you can have the enthusiasm to work." Gu Zhenhua said with a smile: "The gun tube is doing well, but one a month, it's too slow, is there a better way?" ”

"Yes!"

Master Ge said with a smile: "I have just built a big waterwheel, which is powered by a waterwheel to drive the stone plate to rotate, and then fix the drill bit on the stone plate, and then go to drill the pipe. After using water power, it is tireless, no need to rest, day and night, and the force is steady. I tried it half a month ago, and now two batches of guns have been drilled, and one can be drilled in an average of six or seven days. The next step is to increase the number of water wheels. ”

When Gu Zhenhua heard this, he suddenly came to his senses, and said with a smile: "Go and show me the waterwheel." ”

Ge Craftsman took Gu Zhenhua to the north side of the factory, which happened to be close to the Ju Shui, the water flow was very abundant, and a waterwheel more than 20 meters high was rotating steadily.

Looking at the huge and clumsy tools, Gu Zhenhua also had to sigh at the magic of technology, just such a small change can increase the efficiency several times, which is indeed very amazing.

"Okay, how can one waterwheel be enough, you have to build more waterwheels immediately, build dozens of them, drill pipes day and night, and strive to make 300 firewheels a month, or even more, only in this way can you meet the needs."

When Master Ge heard Gu Zhenhua's words, he couldn't help but smile bitterly: "Grandpa Guo, it's not difficult to build a water truck, the biggest difficulty now is steel, and the hydraulic drilling machine consumes a faster drill bit." The steel we made was unusable, and we all relied on buying it from outside, and the last time Zhou Kun brought back a batch of sulfur from the Japanese country, he brought 200 catties of good steel, all of which were used by us. It's a shame to say that the steel smelted by the dignified Heavenly Empire is not as good as the small Wa Kingdom, and all of us are blushing. ”

Gu Zhenhua also saw that the biggest problem now falls on steel, and if this problem is not solved, military production will not want to advance by leaps and bounds.

"Everyone, everyone has worked hard, you just have to make the fire with your heart, and the rest of the things will be handled by the lord!"

Gu Zhenhua gave a few words of encouragement, and then left the firearms factory with Master Ge and went directly to the nearby ironworks. It was the smoke that was smoking, the three blast furnaces lined up in front of me, the air around it was extremely hot, and the craftsmen had already thrown off their bare arms, but everyone was still sweating and dripping down.

Not far from the blast furnace, there are more than a dozen furnaces, and the master craftsmen are swinging their hammers, striking hard, sparks are everywhere, and the scorching sparks will even fall on the skin. So the artisans' arms and faces were full of speckled burn marks, but they didn't care, they still beat as usual.

Every industry has its challenges, and these artisans are no exception!

Before the crucible method of steelmaking, China's steelmaking technology was the most advanced in the world, and the Ming Dynasty even extended the steel-filling method to its peak.

According to Tang Shunzhi's record: "Cast pig iron and wrought iron together, when it is extremely ripe, the pig iron wants to flow, then the pig iron is rubbed on the wrought iron, and it is rubbed in." That is to say, pig iron and wrought iron are smelted together, and when the pig iron melts and the iron juice is about to flow, the molten pig iron is rubbed into the wrought iron, and the steel is smelted.

This is the famous Su Gang method, Gu Zhenhua has brought a lot of craftsmen from Nanjing, and they are proficient in this method. I saw a stout blacksmith put a piece of wrought iron in the crucible, heated it for about three minutes, and then put a piece of pig iron into the crucible and continued to heat it with air blast.

Wait until the pig iron begins to melt, clamp a section of the pig iron with iron tongs, pour the iron juice on top of the wrought iron, the apprentice at this time constantly turn the wrought iron, evenly absorb the molten iron, and carry out two times before and after, and then the master takes out the wrought iron and begins to beat and forge vigorously.

Gu Zhenhua carefully observed every link on the side, his brows furrowed, and at this time, the blacksmith Liu on the edge had already laid a piece of steel.

Master Ge hurriedly asked, "How is it, how is the steel mouth?" ”

Blacksmith Liu shook his head painfully: "Reluctantly, it's not bad to make swords, but I just can't figure it out, how can this steel mouth be inferior to the things of the Japanese Kou, it's really evil!" ”

Blacksmith Liu squatted on the ground in pain, holding his head, and said nothing. Master Ge also shook his head and sighed.

"To do work is inseparable from good steel, but it is ...... Ay! The old man sighed heavily.

Gu Zhenhua waved his hand and said with a smile: "Don't be frustrated, big guy, Benjue just observed, our steelmaking technology is definitely first-class, and the responsibility for refining a good official is not up to you!" ”

"Grandpa Guo, where did you say so?"

"Right there!" Gu Zhenhua pointed to a bunch of things next to him.

Blacksmith Liu also hurriedly looked over, only to see that Gu Zhenhua was pointing to a pile of coal, and his head was suddenly insufficient.

"Grandpa Guo, you said that the problem is on the coal?"

"That's right." Gu Zhenhua said with a smile: "In the Han and Tang dynasties, the forests were lush, and most of them had wood to make iron, but since the Song Dynasty, the wood has decreased, so it has to be replaced by charcoal, and since then, the quality of steel has decreased a lot, and it is no longer possible to make a sharp weapon like the Mo knife!" ”

It stands to reason that the use of coal is a technological progress, but there is a slight difference, that is, China's coal generally contains too many impurities, and the ancient people did not have the technology of desulfurization, so the quality of steel smelted is greatly reduced.

Just now, Gu Zhenhua noticed that an apprentice was adding coal directly into the furnace, and he suddenly realized that this was the reason for the decline in the quality of China's steel.

"Grandpa Guo, according to what you said, are we going to reuse wood to make steel?"

Gu Zhenhua smiled slightly: "But try, but the wood is limited after all, and the final effort will be used on these charcoals." ”

Master Ge, Blacksmith Liu, and even all the masters present unconsciously stopped what they were doing and stared at Gu Zhenhua stupidly, wanting to see if this grandfather had any tricks.

Gu Zhenhua walked in front of the coal and looked at it carefully, in fact, it is not complicated to solve this problem, as long as the desulfurization treatment is carried out, but with the current level of technology, I am afraid it will be difficult.

"In this way, go and invite a few charcoal-burning masters and let them try to heat the charcoal, I guess it will have an effect!" (To be continued......)