Go back to the valley to farm

Chapter 463
Chapter 460 Four Sword Refining
A Yin laughed and said, "Where did you get all your strange knowledge?"

Li Junge said with a smile: "Didn't Jiachuan be a salt wharf in those days? It was recorded that Yuzhou salt also entered Guizhou from Jiachuan. It's really amazing."

A Yin kept pouring water on the two clay ball pyramids, and the water steamed over the entire Dragon Kiln, 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. The wedge was hammered halfway in, and the wooden stick opened a hole and became a pair of tweezers.

Li Junge pastes mud on the tweezers and sends them to the kiln to dry. Soon the tweezers are pasted with a thick layer of dry mud, and the fire resistance is much better.

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

He took out a foot-long piece of hardwood, and made a shallow hole in the middle with the other end of a small chisel, and then put the small chisel in the fire to burn red.

Take out a bowl of coconut oil, take out some charcoal, surround the bottom of the pottery bowl, and heat the oil.

Take out the small chisel, first use the chisel to light it in the hot oil, then light it again, and then completely submerge it in the oil.

The small flame above the hot oil flickered and disappeared, and when Li Junge pulled the chisel out, it had already become extremely hard.

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

Using the gap between the wooden stick used as tweezers and the wedge stuck in the middle, Li Junge inserted the chisel head, and then took the wooden stick that had scalded the small eye, tightened it on the screw and pulled it out, and the chisel was completed.

The length of the saw blade is half a meter, and the furnace is [-] cm long. There is no way to heat all the saw blades evenly.

Li Junge didn't force it either, and only burned the first [-] centimeters of the saw blade into bright red.

Next, I need A Yin’s help. Li Junge asked A Yin to clamp the saw blade and lay it flat on the big rock, while he himself took a stone hammer and chisel, and began to chisel hard from the red spot of the saw blade fifteen centimeters away. go down.

The front part of the saw blade has been tempered and softened, and it is even softer when it is burnt red, leaving a small tooth mark when it is hammered down.

Every time he chisels, Li Junge puts the chisel in cold water to cool down, then strokes his clothes twice to dry them quickly, and then makes a second stroke.

In this way, the saw blade is chiseled at 45 degrees to the direction of the saw blade. After repeated burning and chiseling several times, the saw blade gradually tends to split into two pieces.

After the last burn, Li Junge asked A Yin to press the red-hot section with a stone hammer, and he gently moved the saw blade. After several times, the saw blade was finally divided into two pieces, one was more than 30 cm long, and the other was ten. a few 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-hot, Li Junge trimmed the edge of the knife with a hammer 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 gravel.

Because the hardness has been greatly reduced, the molding is very fast, but Li Junge did not make the blade sharper, and only made a V-shaped opening to finish the job.

……

I didn't talk all night, and when I woke up the next morning, a thick layer of crude coconut oil had accumulated in the two large tanks.

The two had a hasty breakfast and started their respective jobs.

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

Ayin went to collect seaweed, dry grass for fire, and collect ashes.

Yesterday, many barrels of seawater went down on the mud ball, and you can already see white patterns piled up on each of them, which is coarse salt.

Li Junge turned the mud balls over again, placed the top ones on the bottom, and the bottom ones on the top, and continued to water.

When the firewood turned into carbon, Li Junge took another screw, burned it red, and hammered it into a nail with a broad point and a narrow point.

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

Then, in the same process, burn the nail red, and harden the two tips in hot oil, so that a drill bit that can be used at both ends is obtained.

Now the pressure drill can finally come in handy. Take out a bamboo tube with closed ends, take the concave side of the joint head, drill a hole on the side, and drill a hole in the center.

The hole on the edge is for air, and the hole in the middle is for oil.

A bamboo tube of the same diameter is plugged into the hole on the edge, so that even if the oil does not pass through the hole when the oil is filled, the hole 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 heat-insulating ditch next to the chimney, so as not to accidentally kick it over.

Then start boiling a new pot of coconut oil.

While the oil is boiling, the knives are ready to be handled.

First deal with the small knife, after burning red, use yesterday's chisel to chisel out a few notches on the non-sharp side of the back. After natural cooling, use a flint with a blade to expand the notches into small grooves. The serrated side is easier to deal with. Grind the sawtooth down halfway and it will be done, and then it will be used for binding and adding handles.

After processing the shape, start applying mud.

A layer of thin mud piled up on the side of the knife, thicker on the side of the sawtooth, and thinner towards the blade.

This mud is prepared, and it has carbon pink mud, plant and wood ash.

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

After this side is dry, turn it over and treat the other side in the same way, and put it on the dragon kiln to bake after finishing the treatment.

While baking the short knives, Li Junge started to handle the long knives.

The same method of covering the soil, but this time Li Junge thickened the blade side and scraped out the serrated side.

Putting the long knife on the dragon kiln to dry, Li Junge sent the small knife wrapped in soil into the furnace.

Then I found a bamboo trough with an oblique opening, the opening was very long, and the bottom was a certain distance from the bottom of the trough, which could hold a lot of oil.

Put mud on the inside and outside of the bamboo tank and dry it.

Poured half a slot of coconut oil into it, and after measuring the amount, poured the oil into a pottery bowl and burned it.

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

When the oil is hot, carefully pour the oil back into the bamboo tank.

At this time, it is about to be cut. Put the bamboo tank on a slight slope, let the oil below become deeper, take out the blade, put it in the meat-cutting posture with the cutting edge facing downward, and then send it to the bottom of the cylinder to completely submerge.

The oil boiled immediately, but it didn't, because the blade was completely immersed in the oil.

After lifting and dipping several times, remove the blades into cold oil to cool.

After everything was properly placed, Li Junge began to check the blade.

Knocking off the crusted soil, Li Junge could see the beautiful burnt pattern on the edge of the knife.

After randomly grinding on the gravel, some metal parts were exposed, and Li Junge took the tip of the drill bit and scratched lightly on the edge of the cutting edge.

No trace was left, but a small bright spot appeared on the tip of the drill.

Li Junge estimated that the hardness of the drill bit after oil quenching was about 57 degrees, so Li Junge estimated that the hardness of the cutting edge of this small knife covered with soil reached [-] degrees!
The subtlety of burning the blade with soil is that the blade cools quickly, and a high-hardness crystal phase will be formed inside the steel of the blade; while the place where the soil is thick is cooled slowly, and the final crystal phase formed there is not brittle and hard, but maintains Toughness and elasticity make the knife tough and tough.

Li Junge raised his blade to the sky and laughed loudly: "Successful!"

At this time A Yin came back and said, "Er Pi, did you get the knife out?"

Li Junge smiled and said: "The small knife has been made out, and its hardness has been restored, and its brittleness has been reduced. Hahahaha, the ancestor's method of covering the soil and burning the blade is really powerful!"

A Yin said: "Show me quickly, it's so dark, it's so ugly!"

Li Junge said with a smile: "It hasn't been polished yet, it will be great when it is polished, and the burnt blade pattern is so beautiful. Next, let me do a trick for you."

After speaking, put the long knife into the furnace.

Meanwhile heat the oil.

After about ten minutes, use the same method, cut the serrated side of the long knife into the oil, then send it to the bottom, lift it a few times, and put it in the cold oil to cool down.

Then he took out the blade and laughed loudly: "How is it? Isn't this trick amazing?!"

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

Li Junge said in surprise: "Didn't you notice that the blade changed from curved to straight?"

A Yin looked again: "Oh, it's true! What's going on?"

Li Junge said with a smile: "Back then, my Tang sword was famous all over the world. After the Japanese learned it, they couldn't be straightened. They became curved, and finally evolved into the current samurai sword. I just used it in the opposite way. Finally, the bending problem of the saw blade has been solved, and now we have to temper and cover the blade with soil again. This time, the center is left thick, and the sawtooth and blade are thinned to scrape out the burnt blade pattern. Instead of cutting, insert it directly into the oil. Quenching it again, you will get a good knife with a hard outer edge and a flexible middle stem!"

A Yin shook his head and said, "You boys just like to play with knives and sticks. Go ahead and do it. I'll boil the oil and pour the sea water."

Quenched the long knife again.Li Junge poured the ashes burned by Ayin into a bucket and filled them with water, filtered out a basin, and then selected several flat stones of different thicknesses, ready to grind the knife out.

Alkaline water sharpening does not rust, unlike tap water, sometimes the rust will come out after grinding.

But this is precisely the characteristic of high-hardness steel, the stainless one, the hardness can reach 56 and it will be useless.

First thick and then thin, every time you have to grind off the last grinding marks, and also ensure that the edge line is straight, this is a hard work.

Fortunately, Li Junge is an expert in sharpening knives. He used to play with mirrors when he had nothing to do at home. Three hours later, two gleaming knives appeared in his hands.

Looking at the wavy burning patterns on the edge of the blade, Li Junge was so proud that his hands were itchy.

After taking it, the handle of the knife was already made at home, and began to assemble the small knife. The width of the handle head is 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 thin rattan silk, and made it out of bamboo slices. After making a scabbard, after assembling it, he happily ran to A Yin to offer the treasure.

A Yin took the knife, pulled it out and took a look: "Wow! It's so beautiful! There are patterns on it after polishing!"

Li Junge smiled happily: "This is the burnt edge, which greatly improves the hardness of the edge. Of course, it must not reach the level of the first saw blade, but it has good toughness, so don't worry about breaking it."

A Yin tried the edge of the knife with that finger, and said, "It's so sharp!"

Li Junge said: "This is a cutting knife. It can be used to cut fish and meat slices and bamboo shreds, but it can't be used to cut trees and bones. It has a different purpose."

(End of this chapter)