The next month was the most focused time in Qian Jin's life. After arranging the affairs of the courtyard, he simply lived in the iron workshop and studied the flintlock pistol craft with Tian Li.

Jin Taiming had already returned to Guanhai City with another short musket, and there was no news yet; The letter also brought Wang Youcai, and it gave a detailed account of the imitation of the flintlock pistol. If there is enough time, after a year or two, Qian Jin believes that Wang Youcai will be able to figure out the entire process of flintlock pistol.

But I can't afford to wait. The arrival of the guest star was a vision in the eyes of others, but Qian Jin always felt that it was a starting gun. As for who the contestants are, Qian Jin does not know, anyway, it is certain that there will be a seat for him on the track. When spring begins, he is ready to head south.

The blueprints of the Six-Eyed Fire Gun have long been available, and Qian Jin has given it a resounding name - Six Turns Divine Machine; The entire processing technology of the flintlock pistol, Qian Jin has also sorted out his thoughts in his mind. Just make the barrel out, and whether it's a six-turn magic machine or a flintlock pistol, it's half-baked.

For the material of the barrel, Qian Jin chose iron instead of copper. It is rumored that Frankie likes to use copper to cast cannons, and Qian Jin couldn't help but feel sour after hearing it, which is the raw material for minting copper coins. But there was no way, although the iron cannon was cheap to cast, it was easy to explode, and the generals did not dare to use it. Qian Jin is not extravagant enough to use copper to make a gun barrel, and besides, can a musket made of copper still be called a gun?

Pig iron, because of the high carbon content and impurities, although it has obtained a certain rigidity, it is very easy to brittle; The wrought iron produced by Chen Guo by the iron frying method can meet the needs of repeated forging and processing because the carbon content is much less than that of pig iron. Wrought iron is soft, which determines that it has good processing performance, and at the same time, it also needs to improve its strength with the help of certain methods.

In Chen, the most commonly used method is carburizing. Since it is seepage, it means that the carbon content of the processed device is not uniform. However, even so, the surface carbon content of the created device has been increased, and in fact, high-carbon steel has been partially obtained. This is actually a case hardening technique.

As for the heat treatment technology, normalizing, annealing, tempering, and quenching technologies have been used in Chen Guodu, but the fire is all mastered by experience.

To Qian Jin's relief, Tian Li was already able to skillfully roll the iron plate into a prototype of the barrel. If you are a little lazy, you only need to drill through the inside of the barrel and polish it, and then drill an eye in the outer wall of the barrel for inserting the arquebus, and the prototype of the arquebus will come out, and then fix the six firecrackers, and the six-eyed firecracker will become.

But Qian Jin wants more than that, and Tian Li is not willing to do this.

Ever since he had taken the money to study the flintlock musket, Tian Li had memorized its structure and all the parts. It would be a pity if the gun was dismantled, but he later returned it to Qian Jin, and admitted that he could not imitate it with his current craftsmanship.

Qian Jin also knew that flintlock pistols were difficult to make, otherwise they would have been used on a large scale in Europa countries.

The main reason is that the shape of the firing device is too complex, which requires extremely high forging skills, and various rough blanks can be processed by hand alone. In addition, it is necessary to use metal processing tools such as files, hacksaws, drills, and wire turns, and copper plating must be used to process them, otherwise they are easy to rust. The most difficult thing is the spring blade, because to deform many times, the spring blade needs to be made of steel, and it also needs to be baked blue to prevent rust. But steel is still extremely rare in Chen Guo.

For these, Qian Jin only knows a rough idea, and has never operated it himself.

Sharpening knives is not a mistake for woodcutters, and the first thing Qian Jin learned was to make crucibles. The potters in the workshop would fire pots, bowls, and jugs, but they knew nothing about crucibles. Qian Jin personally went into battle, refined the screened graphite ore into fine powder, and then mixed it with white clay and water.

Although the crucible has the word "pot", it is actually more like a jar. The first crucible was formed and dried, but when it was burned, it shattered. Qian Jin thought about it for a while, and felt that he still hadn't mastered the heat well. Although graphite powder conducts heat quickly, it can be made into a jar shape, and the key is to rely on the sintering of alumina in the white clay.

Later, after the crucible rough embryo entered the furnace, Qian Jin instructed that the temperature should not be too high at the beginning, otherwise the temperature of the rough embryo inside and outside the surface is not the same, and it is easy to crack; After the rough embryo hardened and solidified, Qian Jin instructed the craftsman to blow the air, slowly raise the temperature in the furnace, and burn for about half an hour before increasing the fire.

After four or five failures, Qian Jin had basically mastered the firing rules and successfully made the first graphite crucible. After the crucible cooled down, Ding Wei took the handle on the edge of the crucible and knocked it lightly a few times, making a ding-dong sound, so he said strangely: "Master, is this going to use this jar to pickle sauerkraut?" ”

"Your master pondered for two or three days before he came up with this thing, and you actually used it to hold sauerkraut?" Qian Jin scolded with a smile.

"It is estimated that only the master in the world will use graphite ore to burn jars." Ding Wei smiled innocently and asked, "What does the master plan to use it for?" ”

"It's hard to say whether it's useful or not. Did Tian Li's iron bar come out? ”

"It's ready."

"That's fine. There are still three jars to burn, and you can also practice your hands. ”

Qian Jin carried the fired crucible out of the pottery workshop and came to Tian Li's iron workshop.

It covers an area of about one acre, the walls are made of green bricks, and some ventilation holes are opened, and the space inside is huge. In the middle is a brick stove with a chimney leading to the roof to exhaust smoke, and the stove is made of wooden bellows, driven by animal power; Immediately next to it is a pool of water that can be used to quench red-hot iron, and if a fire breaks out, the water in the pool can also be used to extinguish the fire; On the side of the gate is the processing workshop, which is the place where the iron is processed and formed, and the anvils, hammers and other utensils are readily available; Inside, there is an area where the materials are stacked, separated by a brick wall, where coal lumps are stacked on one side and pig iron lumps on the other.

At this time, Tian Li was holding an iron rod thick with chopsticks in his hand and looking at the air to see if there were any bends.

"Master Tian, are you ready?" Qian Jin joked and carefully rested the crucible in his hand on the ground.

Tian Li glanced at the novelty on the ground and replied, "It's all right, just wait for the master to show it." ”

Qian Jin walked up to him and inspected the various shapes of thin iron rods, files, scrapers, long thin iron sheets and other objects on the table one by one. Before, he had explained the shape and size of the iron tools that needed to be built one by one, but he didn't expect Tian Li to comprehend it quickly, so he couldn't help but praise: "Yes, after these tools are made, you can have food anywhere." ”

The old man laughed. Seeing these objects that the old man came up with, the outside world is not uncommon for me. Tian Li Zhengse said.

"It's too early to say that." Qian Jin smiled and ordered, "Let's make a file first." ”

"Okay."

Tian Li picked up an iron piece on the table and handed it to Qian Jin. Qian Jin took it and looked at it carefully, this rectangular piece of iron was about ten inches long, about five inches wide, and about two inches thick, but the end of the iron piece was ground into a sharp incision. He instructed Tian Li to put the graphite crucible in the furnace, and he himself pasted the iron sheet with charcoal powder, and wrapped it with a layer of white clay on the outside and sealed it. When everything was ready, he put the lump in his hand in the graphite crucible and set it up, and covered it with a clay lid.

"Pull the bellows and start the fire." Qian Jin commanded.

A helper's man next to him began to drive the mule pulling the bellows. Half an hour later, Qian Jin used a hook to open the clay cover, only to see that the inside of the graphite crucible was already red. He took out the piece of iron wrapped in clay and charcoal powder with pliers, threw it on the ground and cracked it, and then grabbed the piece of iron and threw it into the bucket next to him.

There was only a snort, and a mist rose from inside the barrel.

Qian Jin scooped up the piece of iron from the water and washed it, and on the surface, the piece of iron did not change much except that it was dirty. But in fact, after carburizing, the hardness of this piece of iron is already extremely high, but its brittleness has also increased, and it needs to be tempered. So he held the iron sheet with his tongs and roasted it on the flame for a quarter of an hour.

Tian Li prepared some copper powder, as well as a simple alcohol lamp, and the alcohol was used as the "wine head" when steaming wine in a winery, with a degree of eighty or ninety degrees.

Qian Jin polished the piece of iron with a whetstone until it was shining, and then motioned to Tian Li to light the alcohol lamp and bake the copper powder on the alcohol lamp. When the white copper powder turned red, he himself took the iron sheet and baked it on the copper powder.

This is baked blue, the labor is very particular, if it is uneven, you need to start again.

After a short time, a blue film begins to "grow" on one side of the iron sheet. When one side of the iron piece was all covered with iron blue, he turned the iron sheet over and drew the gourd in the same way. At this time, Qian Jin's forehead was already covered with a layer of fine beads of sweat. Tian Li didn't dare to come out of the atmosphere next to him, and his eyes stared straight at the changes that occurred on the iron sheet.

"Fortunately, the first knife was successfully made. With this blade, it is possible to engrave the rough blank of the file. Qian Jin wiped his sweat and said.

Next, Qian Jin fixed the file on the wooden board, used the blade to obliquely compare the surface of the file, and then swung the small hammer. The file has three sides, each of which has been polished to a polished finish. What Qian Jin needs to do is to use a shovel blade to carve more than 100 lines on each knife surface, and each line is at a 30-degree angle with the file; After finishing, it is necessary to carve another 100 textures at 90 degrees according to the previous texture. In this way, the file will form many fine teeth. In this way, the file can be finely sharpened on iron.

"Fortunately, the first knife was successfully made. With this blade, it is possible to engrave the rough blank of the file. Qian Jin wiped his sweat and said.

Next, Qian Jin fixed the file on the wooden board, used the blade to obliquely compare the surface of the file, and then swung the small hammer. The file has three sides, each of which has been polished to a polished finish. What Qian Jin needs to do is to use a shovel blade to carve more than 100 lines on each knife surface, and each line is at a 30-degree angle with the file; After finishing, it is necessary to carve another 100 textures at 90 degrees according to the previous texture. In this way, the file will form many fine teeth. In this way, the file can be finely sharpened on iron.