People witnessed the knife numbered ten from taking off to falling. When the blade collided with the iron block, sparks appeared directly. With a bang, the knife did not break. Now people focused their attention on the edge of the knife, including the beard.

Xu Dezhi picked up the knife. There was no gap in the knife, but it was blunt, and the entire hole was quite flat.

"Commander, the blade of this knife with the number ten is blunt."

It is blunt, which means that the iron is already dry iron, and the carbon content is extremely low, close to pure iron. The extremes of one and ten are just confirming the two characteristics of pig iron and dry iron. Moreover, this tenth is also the longest-lasting group. The time from one to ten is progressing upward, which shows that Qing Cang's method is useful.

As soon as this was said, it caused another commotion. Although people looked at the matter with skepticism, it was the case that they could not believe it.

This is different from their impression. They think that iron should be hard, not soft, at room temperature, but that's what it is right in front of them.

Qing Cang would not take care of the feelings of these people, but said, "Xu Dezhi, please continue to try the others and choose two knives that you think are the best!"

Xu Dezhi nodded. After trying it just now, he was quite shocked by him. He had never encountered such a thing after being a blacksmith for so many years. Did they think it was wrong? Qing Cang really has a way to mass-produce the so-called smelting iron with stir-fried steel? If that's the case, it would be a revolution in cast iron.

Beard will no longer say anything, because Xu Dezhi's next attempt made everyone hold their breath and watch, for fear of missing the exciting part.

Everything was as Qing Cang guessed. He tried it last. At the beginning, the few hands were still blunt. When the sixth hand was done, a piece of pig iron was cut open directly, and the incision was complete, and only a small part of the blade was worn.

Now people are looking forward, and some people are circulating this knife.

A sharp-eyed man carefully observed the entire knife and exclaimed: "Magic, such a knife should be comparable to the level of fifty refining!"

"I think it's not an exaggeration to refine seventy, and it's just like this if you really cut iron like mud."

"The commander is really a god-like man. I can think of this method, but it saves a lot of time and will hardly fail."

"I must write down this method. In the future, I will teach my disciples to pass on it."

At the same time, people wrote down the concept of steel frying, and this method will also be passed down.

Xu Dezhi was still trying, and the more he went down, the more surprised he became, but there was always a critical point. The knife close to the number one was also fragile and was directly damaged into scrap iron.

Finally, he chose two better knives, one of which was a little worn and the other had a small gap.

He presented it to Qing Cang.

"The two knives with numbers 5 and 6 are moderate in hardness and are not brittle, and have reached a very high forging level. But there is still a big gap with the 100-smelting iron."

He spoke with respect, and he spoke in the manner of a student facing the teacher.

Qing Cang took the knife and said, "Battleman Wang, find out the two hourglasses with numbers 5 and 6, and divide ten marks between these two marks, and forge a new ten swords in the same way as before, and take the best one! Then all the weapons are made according to the best standards!"

"yes!"

Wang Zongwei immediately arranged personnel to go down and reforged as Qing Cang said. The blacksmiths no longer doubted anything, and they made fire to forge it as if they were injected with chicken blood.

Qing Cang turned around and said to Xu Dezhi, "Xu Dezhi, where does the water you used to quench come from?"

He honestly replied: "A small river in the east of the county, we all call from where we water. Commander, are there any problems?"

"I will give you a task. As soon as tomorrow and tomorrow, you will ask someone to find ten water sources. Remember that there are ten different places, or streams, or mountain springs. These ten places should be farther away and the water volume should be higher. Then use the best standard for a knife to make ten iron in the same furnace. Put these ten swords into ten water sources respectively, and then compare where these ten water sources are made of the best quality. In the future, all of our soldiers' knives will be quenched with that water source!"

The quenching process looks easy, but it is extremely difficult to master it properly. The heat heat, the degree of cooling, and the quality of water are all related to it. If the quenching is not quenched enough, the blade will not be hard and will be easily rolled. If the quenching is too quenched, the blade will become brittle and easily break; if the quenching is suitable, it must have extremely rich experience.

Qing Cang believes that no one here is more professional than Xu Dezhi, and the problem lies in the water quality.

So he added: "You will be able to temper these ten knives. If you succeed in rewarding ten yuan, and you will be rewarded."

If you want someone to do good things for you, and if he is not present, you have to pay some money, otherwise who will be willing to work for you? It would be good if you don’t do it perfunctorily.

Sure enough, as soon as he finished speaking, the hundreds of people present immediately cheered, and today's class was not in vain.

"Yes, Commander, I understand."

Xu Dezhi fully recognized Qing Cang's idea, and he also found a way to do it. He knew that quenching was important, but he never thought of using the knife made in the same furnace to compare and quench it with different water.

Qing Cang blocked the public with his actual behavior, and no matter who it was, his views on him would be completely changed.

He looked at the sky, and the sky gradually became clear and it was about to pass in one night.

"Okay, let's rest after finishing it, and give me the result tomorrow night."

He was preparing to reforge all the weapons of the entire army to achieve the best result. Of course, the weapons of the three generals were also to be reforged.

At this time, Xu Dezhi asked: "How to deal with these abandoned molten iron furnaces so that they will not be wasted?"

The iron in this furnace is a lot of iron. Although there are many iron ore, it cannot be wasted, so he asked Qing Cang what he thought.

"It's very simple. You mix the first and tenth furnaces together and mix them thoroughly to get iron of good quality. Mix the second and ninth, so keep it going. Remember, don't blow with a blower anymore, otherwise the iron will still become soft."

His principle is very simple. After the two are mixed together, the carbon content can be diluted and iron tools of the same quality can be created.

"So that's it! Thank you Commander."

He suddenly realized that if it were him, he would not be able to think of a solution at all because he did not understand the principles at all.

After what happened just now, they all felt that he was right about what Qing Cang said.
Chapter completed!