Chapter 464: Sword Refining

Ah Yin smiled: "Where did you get all this weird cold knowledge from you?"

Li Junge said with a smile: "Jiachuan was not a salt wharf back then, there is a record that Yuzhou salt also entered Guizhou from Jiachuan, I was surprised, a check, Yuzhou really came out of salt, and the ancestors' methods are really amazing." ”

Ayin kept pouring water on the two pyramids of mud balls, and the water vapor over the entire dragon kiln was steaming, and the sea water in the bucket went down quickly.

Li Junge took out a raw wooden stick and sawed it from the pointed end, and the wedge hammered into half, and the wooden stick opened a hole and became a tweezer.

Li Junge pasted mud on the tweezers and sent it to the kiln to dry, and soon the tweezers were pasted with a thick layer of dry mud, and the fire resistance was much better.

Seeing that the fire was already burning, Li Junge sent the screw to the charcoal fire to burn it red, then clamped it out, and carefully hammered the screw head into a small chisel like a change cone.

He took out a one-foot-long piece of hardwood, made a shallow hole at the other end of the small chisel in the middle, and then put the small chisel in the fire and burned it red.

Take out a bowl of coconut oil, pinch out some coals, wrap around the bottom of the bowl, and heat the oil.

Take out the small chisel, take the chisel and click it in the hot oil, then click it again, and then submerge it in the oil.

The small flame above the hot oil flickered and disappeared, and by the time Li Junge took out the chisel, it had become extremely hard.

Taking a bamboo knife to remove all the remaining three screws on the hand saw, Li Junge made a large pair of tweezers and sent the saw blade into the furnace to heat.

Using the gap between the wooden stick that made the tweezers and the wedge stuck in the middle, Li Junge inserted the chisel head into it, and then took the wooden stick that had been scalded over the small eye, put it on the screw and tightened it out, and a chisel was completed.

The length of the saw blade is half a meter, and the furnace is 40 centimeters, and there is no way to heat all the saw blades evenly.

Li Junge didn't force it, and only burned the first thirty centimeters of the saw blade to bright red.

Next, Ah Yin needed help, Li Junge asked Ah Yin to clamp the saw blade and lay it flat on the big stone, while he himself took the stone hammer chisel and began to chisel down fiercely from the red and bright position of the saw blade fifteen centimeters.

The front part of the saw blade has been tempered and softened, and when it is burned red, it is even softer, and a small tooth mark will be left when the hammer is hammered.

Every time he chisels, Li Junge also puts the chisel in cold water to cool down, and then quickly rubs it twice on his clothes to dry, and then comes a second time.

In this way, the saw blade is chiseled at 45 degrees, and after repeated chisel several times, the saw blade gradually has a tendency to split into two pieces.

After the last red-burned, Li Junge asked A-Yin to press the red-hot section with a stone hammer, and gently broke the saw blade by himself, and after going up and down a few times, the saw blade was finally divided into two pieces, one more than 30 centimeters and one more than 10 centimeters.

This time, the long and short saw blades could be completely put into the furnace, and Li Junge put both saw blades into the furnace for tempering.

After it was red, Li Junge trimmed the edge of the knife that had just been chiseled with a hammer on both sides to make it regular.

Next, the two began to eat.

After eating, the moon came up, and Li Junge began to grind two saw blades on the sand and gravel.

Because the hardness has been greatly reduced, the molding is very fast, but Li Junge did not make the blade sharper, and only opened the V opening to finish the matter.

……

After a night of silence, I woke up the next morning and found a thick layer of coarse coconut oil in the two large vats.

The two had a hasty breakfast and began their respective work.

Li Junge began to add fire again, taking carbon by the way, and at the same time did not forget to pour seawater on the mud ball.

Ayin went to collect the seaweed, the hay to prepare the fire, and the ashes to collect.

There were several buckets of seawater on the mud balls yesterday, and you can already see a white pattern piled up on each of them, which is coarse salt.

Li Junge turned the mud ball over again, the top one was placed below, and the bottom one was placed on top, and he continued to water it.

When the firewood turned into carbon, Li Junge took another screw, burned it red, and hammered it into a nail with a wide tip and a narrow tip at the end.

After natural cooling, while the nails after tempering were soft, Li Junge polished both ends into a spear head shape, and the width of the wide tip was exactly the same as the width of the eyelets on the long saw blade.

Then, in the same process, the nails are burned red, and the two tips are quenched in hot oil, which gives a drill bit that can be used at both ends.

This downward pressure drill can finally come in handy, take out a bamboo tube closed at both ends, take the concave side of the joint head, drill a hole in the side, and drill a hole in the center.

The hole at the edge is used for air exit, and the hole in the middle is used for oil intake.

Plug a bamboo tube of the same diameter into the hole at the edge so that even if the grease does not pass through that eye when the oil is filled, that eye will not be blocked.

Then start pouring oil into the bamboo tube.

After filling the oil, insert the bamboo tube into the bottom of the insulated trench next to the chimney so as not to accidentally kick it over.

Then start boiling a new pot of coconut oil.

When the oil is boiling, it's time to handle the knives.

Deal with the knife first, after it is red, or use yesterday's chisel to chisel out a few notches in the bare back of the unpointed side, and after natural cooling, take the flint with a blade to expand the gap into a small groove, the sawtooth side is relatively simple to deal with, grind the sawtooth half down and finish the matter, and then use it to tie and add the handle.

Once the shape is processed, the clay begins.

A layer of thin mud is piled up on the side of the knife, and the serration is thicker on the side of the serration, and the thinner it gets the further you go to the blade.

This mud is modulated, and there is a lot of soak clay and plant ash.

After the soil covering is completed, take a thin bamboo strip and bend it into a small circle, and scrape out the cutting edge at will.

Wait for this side to dry, turn it over and treat the other side in the same way, and bake it on the dragon kiln after processing.

While the short knife was baking, Li Junge began to deal with the long knife.

The same method of covering the soil, but this time Li Junge applied the side of the blade thickly and scraped out the side of the sawtooth.

Putting the long knife on the dragon kiln to bake, Li Junge sent the knife wrapped in soil into the hearth.

Then find a bamboo trough with an oblique opening, the opening is very long, and the bottom is some distance from the bottom of the trough, which can hold a lot of oil.

Spread mud on the inside and outside of the bamboo trough and dry it.

Half a trough of coconut oil was poured into it, and after measuring the amount, the oil was poured into a clay bowl and burned.

Wet your underwear and wring it out of the water, fold it up and be ready to put out the fire.

Once the oil is hot, carefully pour the oil back into the bamboo trough.

At this time, the bamboo trough is set up at a slight inclination to make the oil underneath deeper, the blade is taken out, and the blade is placed downward in the posture of cutting meat, and then sent to the bottom of the cylinder to be completely submerged.

The oil immediately boiled, but it didn't, because the blades were all immersed in the oil.

After lifting and soaking it several times, move the blade into the cold oil to cool.

Once everything was in place, Li Junge began to inspect the blades.

Knocking away the covering soil that has become a hard shell, Li Junge can see the beautiful burnt blade pattern at the edge of the knife.

After grinding it on the sand and gravel at random, revealing some metal parts, Li Junge took the tip of the drill bit and lightly scratched the edge of the cutting edge.

No traces were left, but a small bright spot appeared at the tip of the drill bit.

The hardness of the drill bit after oil quenching, Li Junge is estimated to be about fifty-seven degrees, and the hardness of the blade of this knife covered with soil and burning blades is estimated to reach sixty!

The subtlety of the overburden burner is that the blade cools quickly and forms a high-hardness crystal phase inside the steel at the cutting edge, while the dense overburden cools slowly, and the final crystalline phase formed there is not brittle and hard, but retains toughness and elasticity, making the knife both strong and tough.

Li Junge held the blade up to the sky and laughed: "It's successful!"

At this time, Ayin came back and said, "Erpi, did you get the knife out?"

Li Junge said with a smile: "The knife has come out, the hardness has been restored, and the brittleness has been reduced, hahahaha, the ancestor's soil covering and burning blade method is really powerful!"

Ayin said: "Hurry up and show me, ouch, it's not dark, it's so ugly!"

Li Junge said with a smile: "It's not that it hasn't been polished yet, it's amazing when it is polished, and the burnt blade pattern is so beautiful that you don't want it." Next, watch me play a trick on you. ”

After saying that, put the long knife into the hearth.

At the same time heat the oil.

After ten minutes, in the same way, cut the serrated side of the long knife into the oil, and then send it to the bottom, and then send it several times, and send it into the cold oil to cool down.

Then he took out the blade and laughed, "How's that?

Ah Yin was confused: "I didn't see anything, I heard a snort, and then the oil gurgled and gurgled and then there was no more......"

Li Junge was surprised: "Didn't you notice that the blade has changed from curved to straight?"

Ah Yin looked at it again: "Oh, really, what's going on?"

Li Junge said with a smile: "Back then, my Tang straight knife was famous all over the world, and after the Japanese learned it, they couldn't straighten it, it became a curved one, and finally evolved into the current katana." I just used it in the opposite way, solved the problem of bending the saw blade, and now I have to temper the soil and burn the blade again, this time leave the middle thick, the serration and the blade part thin, scrape out the burning edge lines, do not need to cut the technique, go straight into the oil and quench it again, you will get a good knife with a hard outer edge and elastic and tough stem!"

Ah Yin shook his head and said: "You boys, you just like to play with knives and sticks, you go get it, I'll boil oil and pour seawater." ”

The long knife was re-quenched. Li Junge put the ashes of Ayin's burned plants and trees in a bucket with water, filtered out a pot, and then selected a few flat stones of different thicknesses, ready to polish the knife.

Alkaline water grinding knives do not rust, unlike tap water, sometimes rust comes out after grinding.

But this is precisely the characteristic of high-hardness steel, the stainless one, the hardness can reach fifty-six and almost stop eating.

First coarse and then fine, each time to grind off the last grinding marks, but also to ensure that the edge line is straight, this is a kung fu work.

Fortunately, Li Junge is an expert in sharpening knives, and he used to play with mirrors when he had nothing to do at home, but after three hours, two cold and shining knives appeared in his hands.

Looking at the wavy burning blade lines on the blade, Li Junge felt very proud, and his hands were itching.

After taking the handle of the knife at home, he began to assemble the knife, the width of the handle was about the same as the width of the blade, Li Junge inserted the blade into the gap of the handle, found it and wrapped it tightly with the fine rattan silk, and made a scabbard with the bamboo piece, and after the assembly was completed, he ran to Ayin to offer treasure.

Ah Yin pulled out the knife and looked at it: "Wow! It's so beautiful! There are patterns on it when it is polished!"

Li Junge smiled merryly: "This is the burning edge line, which greatly increases the hardness of the cutting edge, of course, it will definitely not reach the level of the first saw blade, but the toughness is good, don't be careful about breaking it." ”

Ayina tested the edge of the knife with her finger and said, "It's so sharp!"

Li Junge said: "This is a cutting knife, which can be used to cut fish, cut meat slices, cut bamboo shreds, etc., but it can't be used to chop trees and chop bones, and the use is different." ”