People witnessed the knife numbered ten rising from the sky and then falling.
When the blade collided with the iron block, sparks immediately erupted.
With a bang, the knife did not break.
Now people focused their attention on the edge of the knife, including the cheek.
Hu included.
Xu Dezhi picked up the knife.
There was no chip on the knife, but it was blunt and the whole hole was quite flat.
"Commander, the blade of the knife numbered ten is blunt."
Blunt means that the iron is already wrought iron with extremely low carbon content, close to pure iron.
The two extremes one and ten just confirm the two characteristics of pig iron and wrought iron, and the tenth is also the longest lasting one.
In one group, the time from one to ten is progressive, which shows that Qing Cang's method is effective.
As soon as these words came out, they once again caused a commotion.
Although people looked at this matter with suspicion, the fact was that they couldn't help but not believe it.
This is different from their impression.
They think that iron should be hard at room temperature, not soft, but this is what they see.
Qingcang would not care about the feelings of these people, but said: "Xu Dezhi, you go on to try other ones and choose the two knives you think are the best."
Xu Dezhi nodded.
After trying it just now, he was quite shocked.
He had never encountered such a thing as a blacksmith for so many years.
Are they all wrong?
Qing Cang really has a way to use fried steel to mass-produce the so-called hundred-smelted iron.
If that is true, it will be a revolution in cast iron.
The bearded man didn't say anything at this moment, because Xu Dezhi's next attempt made everyone watch with bated breath, for fear of missing the exciting part.
Everything was as Qing Cang had guessed.
He tried counting down and found that the first few swords had blunted the blade.
By the time he reached the sixth sword, a piece of pig iron was split open directly.
The incision was complete, but only a small part of the blade was cut. wear and tear.
Now people moved forward to look at it, and some people even passed the knife around to look at it.
Someone with sharp eyes carefully observed the whole sword and exclaimed: "It's amazing, such a sword should be comparable to the level of fifty refinements."
"I think seventy refinements is not an exaggeration, and the real thing is to cut iron like clay."
"The commander is really a genius.
This method can be thought of.
It saves a lot of time and almost never fails."
"I must write down this method, and I must pass it on to my disciples in the future."
At the same time, people remembered the concept of steel frying, and this method will also be passed down.
Xu Dezhi was still trying.
The further he went down, the more surprised he became, but there was always a critical point.
The knife close to number one was also fragile and was directly damaged into scrap metal.
Finally, he selected two better knives, one of which had some wear and tear, and the other had a small chip.
He presented it to Qingcang.
"The knives No. 5 and No. 6 have moderate hardness and are not brittle.
They have reached a very high level of forging.
However, there is still a big gap between them and Hundreds of Iron Smelting."
He spoke with respect, as if he were a student facing his teacher.
Qingcang took the knife and said: "Captain Wang, find the two hourglasses numbered 5 and 6, divide ten marks between these two marks, and forge a new ten mark in the same way as before.
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For a knife, take the best one, and then all weapons will be made according to the standards of the best one."
"yes" Wang Zongwei immediately arranged for people to go down and re-forge as Qing Cang said.
The blacksmiths no longer had any doubts, and started forging over fire as if they were drinking chicken blood.
Qingcang turned to Xu Dezhi and said, "Xu Dezhi, where does the water you use for quenching come from?"
He replied honestly: "There is a small river in the east of the county.
We get water from there.
Commander, do you have any questions?"
"I will give you a task.
At dawn tomorrow, you have people go find ten water sources.
Remember, they are ten different places, either creeks or mountain springs.
These ten places should be farther apart and have higher water volumes.
Then use the criteria of the best knife to make ten Come on, remember, you need to make ten knives from the same iron in the furnace, put these ten knives into ten water sources for quenching, and then compare which of the ten water sources produces the best quality knives.
Soldiers' knives are quenched in that water source."
The quenching process seems easy, but it is extremely difficult to control it just right.
The heating temperature, the degree of cooling, and the quality of the water all have a lot to do with it.
If it is not quenched enough, the blade will not be hard and will easily curl; if it is quenched too much, the blade will become brittle and easy to break; if it is quenched properly, it requires extremely rich experience.
Regarding Huo Hou's confidence, Qing Cang believes that no one here is more professional than Xu Dezhi, and the problem lies in the water quality.
So he added another sentence: "These ten knives must be tempered by you.
If you succeed, you will be rewarded with ten drops of money, and all of you will be rewarded."
If you want someone to do something good for you, and in his absence, you have to pay some money, otherwise no one will be willing to work for you without being perfunctory.
Sure enough, as soon as he finished speaking, the hundreds of people present immediately cheered.
Today's class was not in vain.
"Yes, Commander, I understand."
Xu Dezhi fully agreed with Qingcang's idea, and he also found a better way.
He knew that quenching was important, but he had never thought of using different water to compare quenchings of knives made in the same furnace.
Qingcang stopped everyone with his actual actions.
No matter who it was, their views on him would be completely changed.
He looked at the sky.
At this time, the sky was gradually getting brighter, and the night was about to pass.
"Okay, let's all take a rest after finishing this.
Just give me the results tomorrow night."
He is ready to re-forge all weapons in the army to achieve the best results.
Of course, the weapons of the three generals also need to be reforged.
At this time, Xu Dezhi asked: "How to dispose of these abandoned hot metal furnaces so that they will not be wasted?"
There is a lot of iron in this furnace.
Although there is a lot of iron ore, it cannot be wasted, so he asked Qingcang what he thought.
"It's very simple.
If you mix the first and tenth furnaces together and stir them thoroughly, you can get high-quality iron.
Mix the second and ninth furnaces, and so on.
Remember, you can't blow with a blower, otherwise the iron It will still get softer.”
His principle is simple.
When the two are mixed together, the carbon content can be diluted.
Make ironware of the same quality.
"Thank you so much, Commander."
He suddenly realized that if it were him, he wouldn't be able to think of a solution at all.
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Because he doesn't understand the principle at all.
After what happened just now, whatever Qingcang said now, they all felt that he was right.
He is a god-level existence in the eyes of everyone
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