When Bifang took the steel bar out of the blast furnace, his whole body was trembling.
Exhausted or excited?
Or is it both?
I can't explain it clearly, but at the moment of harvest, all the sufferings turned into the sweetest fruit, with all kinds of flavors in it.
The dazzling metal in front of you can no longer be called iron, but steel!
Stronger, stronger and sharper!!!
Taking a deep breath, Bi Fang alleviated the dizziness caused by overexertion. The familiar wooden handle was firmly held in his hand. The force rose from one point, fell from high, and hit the steel bar heavily.
There is no more black iron sheet falling, and all impurities are reaching the limit of manual removal.
Squeezed by 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 make than iron.
No matter in terms of hardness, toughness, or ultimate sharpness, steel is far superior to iron, and the same is true for hammering. Bi Fang was very careful, fearing that if the hammer went wrong, he would have to do it all over again.
There was no longer enough time for Bifang to do this. The sun was rising high, and around nine o'clock, Mo went out to eat and rest. The time left for him to forge might be less than six hours.
I really felt nervous about participating in the Broken Knife Competition.
"In order to make a usable dagger today, I am not going to sharpen it. There is no sharpening machine. If you want to sharpen the edge, you have to use a whetstone to sharpen it. You can sharpen it as long as you want."
"So I plan to make a double-edged dagger, which does not need to be sharpened, but the tip can stab, which is also practical. Furthermore, our steel is just the most common steel in the end, and no one knows how strong it is.
, without sharpening, you can also use thickness to make up for strength.”
Sharpening the blade will inevitably cause the edge to become thinner. Bi Fang does not have much confidence in the strength of the blade he created, and is worried that it will easily cause chipping.
Heating, forging, heating, forging.
The sun rises in the east, moves to the south, and has a tendency to move to the west.
After finishing the mushroom and rabbit soup, Bi Fang soaked his hands in the puddle for a while, regained some energy, and added the red dagger.
Yes, dagger.
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 to glue the wooden handle. The blade was more than twenty centimeters long and narrow, like a bayonet, but too thin. The spine of the blade was very thick, and it was obviously not fully unfolded.
Bi Fang replaced the sledgehammer with a smaller hammer that could better control the force, and began to beat the hammer carefully and evenly.
The dazzling fire made Bifang's face red. From the early hours of yesterday to now, the charcoal in the blast furnace had not been heard and had been burning, adding a bit of craze to the hot rain forest.
【Swordsmith!】
[When did Laofang’s hero appear in LOL? Wild hunter, part-time swordsmith, preferably jungle position!]
【I think it's okay】
[This muscle, I call it the sexiest man, is that okay? 】
【I think it’s okay too】
【Thousands of people are petitioning! I will buy the skin as soon as it comes out!】
The hard steel bar was stretched out again, changing from slender to long and narrow, extending from the spine of the knife to both 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!
Wooden spears and bone spears are all weak compared to metal and steel!
At three o'clock in the afternoon, the light was still good, and the dagger had changed its shape once again, truly taking on the appearance of a knife.
Bi Fang raised the dagger and squatted down to check the lines on each side.
The shape is not exaggerated, just like a commonly seen double-edged dagger, but it is completely made with bare hands without any possessions!
From any aspect, Bi Fang's lines have reached the limit that can be achieved by hand. The spine of the knife is straight and even, the blades that open to both sides are even and smooth, and the tip of the knife is sharp and stylish. Anyone who sees it can't help but
Praise it as a sharp blade.
[Holy shit, I haven’t watched it for only two hours, what a big change]
[It seems like, woo woo woo]
[Unlock Achievements: Come Hard]
[Unlock Achievements: Qilin Arm]
[Hey, the live broadcast ends in three hours, I don’t know how long I’ll have to wait next time]
【It’s mid-June now, it must be 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 also added a large amount of sand and soil under the furnace bridge. This step was so fast that the audience did not see it clearly, and they only thought that Bi Fang had stuffed it again.
Put the weird ash in it.
Next is the final step.
Gu Lang
Quenching.
This time Bifang removed the blower, otherwise the heating temperature would be too high.
"The heat treatment of steel generally includes four basic processes: annealing, normalizing, quenching and tempering. It is also the 'four fires' in the overall heat treatment. Among them, quenching and tempering are closely related and are often used together. One is indispensable."
"I won't go into details about annealing and normalizing. They won't be used next. They are mainly tempering and quenching. Maybe more people have heard of quenching. What you usually see is just heated metal, put into the water, and sizzle.
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 is really difficult." Bi Fang himself had a headache learning it. Not all of what he knew was given by the system. Much of the knowledge was learned by Bi Fang himself.
"The heat treatment process in which metal is heated, austenitized, and then cooled in an appropriate manner to obtain a martensite or bainite structure is called quenching. The most common ones are water cooling, oil cooling, and air cooling. Water cooling is what you just mentioned. Usually
Once placed in water, the temperature will drop rapidly."
"We don't have that much oil, the only options are water cooling and air cooling, and different cooling materials will have different property changes."
"In order to reduce the brittleness of steel parts, the quenched steel parts are kept at an appropriate temperature above room temperature and below 710°C for a long time, 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. We first need to burn the dagger until it is red. Remember, it can only be red, never white, which is the orange-yellow stage. A white knife is very easy to deform and is too
Brittle, what is the specific temperature? You can go online to find the color chart of steel heating."
Seeing the right moment, he took the red dagger out of the furnace. Bi Fang clamped it on the blade and brought it to the basin. Instead of stuffing it in at full speed, he put the blade in. When the high temperature came into contact with the cold water, it exploded instantly.
flame.
[Holy shit, it’s still going to catch on fire?]
【Can water catch fire?】
[Water will decompose at high temperatures to produce hydrogen and oxygen, and then burn first at high temperatures. This is why sprinkling a little water in a burning stove can actually help the combustion.]
[What are you farting about? Sprinkling water to help burn? It consumes a lot of heat that has not yet been generated, right? 】
[Wrong, delete it. Quenching will burn because the quenching agent 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 pretend less.
×]
[Where does the first-class number come from? Look clearly, is this fucking oil? 】
【Why not ask the magical old man? 】
Bi Fang had no time to answer. He had to control the actual quenching process and the rhythm. The blade was soaked in water for only two or three seconds. He changed his face and burst out a ball of flame again.
Under the drone photography, the audience saw that an oxide film peeled off directly from the surface of the blade, which was still brownish yellow.
"In addition to water quenching, you can also use oil cooling. Just use waste engine oil. I don't think any warriors will use diesel gasoline for quenching?"
"As for the oil quenching process, it is basically the same as water quenching. It is heated until it turns red and is directly immersed in it. When the waste engine oil stops bubbling, use a stone or sandpaper to polish off the iron oxide on the quenched knife, and then it can be tempered."
After that, Bi Fang kept repeating this process until it no longer faded, and then sent it to the furnace for heat preservation and tempering again.
This time, the audience discovered that Bi Fang no longer put the knife into the flames, but opened the fire pit and put a dead leaf into the sand pit. When he saw that it had turned brown but not black or burning, he directly put the dagger in.
In the sand under the furnace bridge.
Then sprinkle some water on the charcoal fire on the furnace bridge to extinguish it and let out billowing steam.
What the hell?
At this time, Bi Fang saw the quarrel among the audience, scrolled through the barrage, and said with a smile: "It is true that the varnish is burning, but what you said is wrong. It is not simple high temperature that can directly decompose water, but the high temperature of water.
It then reacts with hot iron to produce ferric oxide and hydrogen. When the high-temperature hydrogen comes into contact with the oxygen in the air, it immediately ignites spontaneously."
"Didn't you see a layer of film peeling off just now? That is ferric oxide."
audience:"......"
Was the quarrel in vain?
[I just said that high temperatures cannot directly decompose water!]
[Pull it down, as an afterthought]
【Shit!】
[So what did Lao Fang just do? Put out 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 used a tree stick to stir up the sand under the furnace bridge.
"The tempering temperature does not need to be that high, but the temperature is difficult to confirm. The best way is to heat the sand. When you feel it is almost done, you can add a leaf that is not so dry, or a piece of paper, and the paper becomes
When it is brown but not black and burning, the temperature is the appropriate tempering temperature.”
Bi Fang pulled out the leaves he had just thrown in. Sure enough, the surface was brown, but it did not turn black or even burn.
"At this time, bury the knife in the sand, let the fool and the blade cool down together, and the tempering is complete. We will get a final dagger. Of course, it still needs to be sharpened a little."
After saying this, Bi Fang felt relaxed all over, and his whole body collapsed on the ground, every muscle whining.