Live Wilderness Adventure

Chapter 503 Steel Dagger

Heat one last time.

When Bi Fang took the steel bar out of the blast furnace, his whole body was trembling.

Exhausted or Excited?

Or is it both?

I can't tell, but at the moment of harvest, all the sufferings are turned into the sweetest fruit, and all kinds of tastes are in it.

The dazzling metal in front of him can no longer be called iron, but steel!

Stronger, stronger, sharper! ! !

Taking a deep breath, Bi Fang eased the dizziness caused by overwork. The familiar wooden handle was firmly held in his hand, and the force rose from one point, fell from a height, and hit the steel bar heavily.

There is no longer any black iron sheet falling, and all impurities tend to the limit of manual removal.

Squeezed under force, the bright orange steel was squeezed little by little, deformed, and became flat and narrow.

The prototype of the dagger has gradually emerged.

But steel is far less easy to build than iron.

Whether it is hardness, toughness, or ultimate sharpness, steel is far better than iron, and the same is true for hammering. Bi Fang is very careful in doing it, for fear that if any hammer is bent, he will have to start all over again.

There was not enough time for Bi Fang to do this, the sun rose high, probably around nine o'clock, and he went out to eat and rest, leaving him with less than six hours of forging time.

I really feel the tension of participating in the knife-breaking competition.

"In order to make a usable dagger today, I don't plan to sharpen it. I don't have a sharpening machine. If I want to sharpen it, I have to sharpen it with a whetstone. God knows how long it will take."

"So I plan to make a double-edged dagger. It doesn't need to be sharpened, but the tip can stab, which is considered practical. Besides, our steel is just the most common steel, and no one knows how strong it is. , without cutting the edge, the thickness can also make up for the strength."

Cutting the blade will inevitably cause the edge to become thinner. Bi Fang does not have much confidence in the strength of the blade he has created, and is worried that it will easily cause chipping.

Heat, forge, heat, forge.

The sun rises in the east, moves toward the south, and tends to move toward the west again.

After eating the mushroom and rabbit broth, Bi Fang soaked his hands in the puddle for a while, regained some energy, and took out the red dagger.

Yes, daggers.

After nearly six days of hard work, at noon on the last day, the prototype of the dagger finally appeared.

The slender iron handle was finally used for glue and wooden handle. The blade was more than 20 centimeters long and narrow, like a bayonet, but it was too thin, and the spine was very thick, obviously not fully unfolded.

Bi Fang replaced the sledgehammer with a smaller hammer with better control of strength, and began to beat finely and evenly.

The dazzling fire made Bi Fang's face red. From the early hours of yesterday to now, the charcoal in the blast furnace has not stopped, and has been burning, adding a bit of frenzy to the sweltering rainforest.

[Swordsmith! 】

[When did LOL come out with Lao Fang's hero, Wild Hunter, part-time swordsmith, it's best to be a jungler! 】

【I think so】

[This muscle, I call it the sexiest man, is it okay? 】

【I think so too】

[Thousands of people petition! If the skin comes out, I will buy it! 】

The hard steel rod was stretched out again, from slender to narrow, extending from the spine to the sides, and the top became sharper. Everyone had no doubt that this knife was enough to pierce the entire human body.

This is metal steel!

What wooden spears, bone spears, compared with metal steel, are all weak!

At three o'clock in the afternoon, the light was still good, and the dagger had changed drastically again, it really looked like a knife.

Bi Fang raised the dagger, squatted down to check the lines on each side.

The shape is not exaggerated, it is the same as the usual double-edged dagger, but it is completely forged with bare hands under the condition of nothing!

Seen from any surface, Bi Fang’s lines have reached the limit of what can be done by hand. The spine of the knife is straight and straight, the blades that open to both sides are even and smooth, and the tip of the knife is sharp and stylish. Anyone who looks at it can’t help but Praise this is a sharp knife.

[Damn it, I haven’t watched it for two hours, it’s changed a lot]

[It seems to be, woo woo woo]

[Unlock Achievement: Come Hard]

[Unlock Achievement: Unicorn Arm]

[Hey, there are still three hours until the end of the live broadcast, I don't know how long I will wait next time]

[Now it's mid-June, at least July, right? 】

Bi Fang clamped the steel dagger with wooden tongs and heated it for the last time. At the same time, he added a large amount of sand and soil under the furnace bridge. This step was so fast that the audience didn't see it clearly. Put weird ashes in.

Next is the final step.

Quenching.

This time Bi Fang removed the blower, otherwise the heating temperature would be too high.

"Steel heat treatment generally has four basic processes: annealing, normalizing, quenching, and tempering. They are also the 'four fires' in the overall heat treatment. Among them, quenching and tempering are closely related, and they are often used together. Both are indispensable."

"I won't go into details about annealing and normalizing. I won't use it in the future. It's mainly tempering and quenching. Maybe more people have heard of quenching. Usually, what you see is just heated metal, which goes into the water and sizzles. smoke."

【Often seen on TV】

【I have seen】

[Tears of engineering materials, this course is too difficult, iron-carbon phase diagram alloy phase diagram]

【I don't want to listen anymore, I'm going crazy】

"Hahaha, engineering materials are really difficult." Bi Fang had a headache learning it himself, and not all he knew was given by the system, and a lot of knowledge was taught by Bi Fang himself.

"Heating the metal, austenitizing it and then cooling it in an appropriate way to obtain a martensite or bainite heat treatment process is the so-called quenching. The most common ones are water cooling, oil cooling, and air cooling. Water cooling is what you just said. Once put in the water, the temperature will drop rapidly.”

"We don't have so much oil, and the only options we can choose are water cooling and air cooling, and different cooling materials will have different properties."

"In order to reduce the brittleness of steel parts, the quenched steel parts are kept for a long time at an appropriate temperature higher than room temperature but lower than 710 ° C, and then cooled, which is tempering."

Bi Fang opened the furnace cover and carefully observed the color of the dagger.

"This is the last step in making the dagger. First, we need to burn the dagger to red. Remember, it can only be red, and it must not turn white, which is the orange-yellow stage. A white knife is very easy to deform, and it is too hot. Brittle, what is the specific temperature, you can find the color map of steel heating on the Internet."

Seeing the timing, Bi Fang clamped the red dagger out of the furnace. Bi Fang clamped it on the blade and brought it into the water basin. flame.

[Fuck, it's still on fire? 】

【Water will catch fire? 】

[Water will decompose at high temperature to produce hydrogen and oxygen, and then burn at high temperature. This is why in a very hot stove, sprinkle some water to help the combustion. 】

[What are you farting, sprinkling water to help fuel the fire? Doesn't it consume more calories than it produces? 】

[Wrong, delete it, the quenching will burn because the quenching is not water but oil, water droplets will burn in the furnace, because water and carbon generate hydrogen and carbon monoxide under high temperature conditions, which is called water gas, read more books, and install less ×】

[Where did the number one come from? Look clearly, is this fucking oil? 】

[Why don't you ask the magical old Fang? 】

Bi Fang didn't have time to answer, he had to grasp the actuality and rhythm of quenching, the blade was submerged in water for only two or three seconds, and he changed sides again, bursting into flames again.

Under the photography of the drone, the audience can see that a layer of oxide film has fallen off the surface of the blade, which is still brownish yellow.

"In addition to water quenching, you can also use oil cooling, just use waste engine oil, diesel gasoline, I don't think there will be warriors using it for quenching?"

"As for the oil quenching process, it is basically the same as water quenching. Heat it until it turns red and immerse it directly. After the waste engine oil stops bubbling, use stones or sandpaper to polish off the iron oxide on the quenched knife, and then you can temper."

After that, Bi Fang kept repeating this process until the color stopped fading, and then sent it to the furnace for heat preservation and tempering again.

This time, the audience realized that Bi Fang no longer put the knife into the flames, but opened the fire pit, and sent a dead leaf into the sandpit. When he saw that it turned brown but not black or burning, he directly sent the dagger into the fire pit. In the sand under the furnace bridge.

Then some water was sprinkled on the charcoal fire on the furnace bridge to extinguish it, and steam billowed out.

What the hell?

At this time, Bi Fang saw the audience's quarrel, flipped through the barrage, and said with a smile: "It's true that hydrogen is burning, but what you said is wrong. It's not a simple high temperature that can directly decompose water. It's water high temperature gas." Then it reacts with red-hot iron to produce ferric iron tetroxide and hydrogen gas, and the high-temperature hydrogen gas will spontaneously ignite immediately when it contacts with the oxygen in the air.”

"Didn't you see a layer of film peeling off just now? That is ferric oxide."

audience:"."

Cooperating for nothing?

[I said that high temperature cannot directly decompose water! 】

[Pull it down, an afterthought]

[Shit! 】

[So what did Lao Fang do just now? Turn off the stove like this? 】

"Tempering, no matter what kind of quenching method is used, it must be tempered afterwards to make the steel more stable and tough. I use the sand roasting method."

Bi Fang sat on the ground and poked the sand under the furnace bridge with a stick.

"The tempering temperature does not need to be so high, but the temperature is not easy to confirm. The best way is to heat the sand. When you feel that it is almost done, you can add a leaf that is not so dry, or a piece of paper, which becomes When it is browned but not black and not burning, the temperature is the proper tempering temperature."

Bi Fang picked up the leaves that had just been thrown in, and sure enough, the surface was brownish-yellow, but it didn't turn black or even burn.

"At this time, bury the knife in the sand, let the sand and the blade cool down together, and the tempering is complete. We have a final shaped dagger. Of course, it still needs to be sharpened a little bit."

After saying these words, Bi Fang felt relaxed all over, his whole body was limp on the ground, and every muscle groaned.

too tired.

But, it's finally done.

Steel Dagger!

Leaf-cutter ants with double-needle chestnut chest, ants with fear of ants, ants with double thorns, and ants with ova. This is an ant colony without a queen.