It took four people to operate and spend three days and three nights to create two knife blanks.

These two knife blanks are the refining method adopted by Pei Ge'an is the refining method of Uzi steel, that is, the steel of Damascus knives.

The steel is heated in a crucible, and it takes 48 hours to heat the furnace to almost 1,200 degrees.

At this temperature, the iron becomes spongy iron and is filled with bubbles.

The residue flows out as liquid, but what is left behind is the essence of iron.

At this time, the toner powder of the bamboo is added to it, and then the furnace is sealed to continue firing, but the furnace temperature needs to be slowly restored to about 800 degrees, which is another day.

This process results in dendritic ferric carbide crystals, also known as cementite, or ferric carbide.

The crystals are optimized during the change of furnace temperature and are evenly distributed in the spongy iron body full of small pores, and are in fact the main component of Damascus steel patterns or water patterns.

Cementite, or carbide crystals, are very hard and acid-resistant, and when the steel is polished, it will appear white or silver.

Compared with pearlite, the other components are mainly composed of bonded metals, which are corroded to black. This creates a beautiful pattern.

Seeing the knife blank, the Pei family father and son were no longer reluctant to master a new steelmaking method, which was a guarantee for survival for a blacksmith family like them.

The blade blank is not a complete knife shape, and wrought iron needs to be added to the back to make the overly brittle blade tougher.

At the same time, there is the most complex and difficult process, and that is decarbonization.

Uzi steel is hard and brittle, mainly because the carbon content is too high.

Ordinary high-carbon steel also has only about 0.6% carbon content, but Uzi steel is generally more than 1.5%.

Therefore, although the Damascus knife is sharp, it must not be cut at a hard object, and it will be broken as soon as it is cut.

The so-called decarbonization is actually striking iron.

After the knife blank was wrapped in steel, it began to be forged again and again.

Zhao Dezhao came over after class the next morning, and they had already completed the forty refinements of the two swords.

Uz steel forging is not an easy task, and at this time, the importance of Pei Gean is even stronger.

Because the co-solvents she makes, as well as the powders of various minerals, come in handy at this time.

One of them was forged, and the other was burned in the furnace, and Pei Gean was responsible for adding the co-solvent.

After this one, the other one is taken out and continues to fight.

This kind of rhythmic output does not exceed the warning line, as long as you get used to it, you don't actually feel tired.

What I am most afraid of is the irregular output, and in a short time, I will be exhausted.

It's like a long-distance runner can run more than 40 kilometers on flat ground, but let them try it out in the mountains, one foot low and one foot high, and they will be wasted for a few kilometers.

One afternoon, Zhao Dezhao also joined in, and the two knives had completed another forty refinements, and now they had reached eighty refinements.

Carefully observed the burned red knife blank, and then observed it after cooling, and listened to the sound, and then Zhao Dezhao felt that it was almost there.

The so-called Hundred Refining Knife does not actually have to be refined a hundred times, but to achieve a certain desired effect.

Now the material of these two horizontal knives has reached the goal expected by Zhao Dezhao.

It's fascinating to see the wonderful pattern of the blade.

This is not quite done, though, because there is still the most important opening striker, quenching.

If there is a mistake in quenching, it is possible to scrap the two knives.

At this time, don't talk about Zhao Dezhao, even Pei Ge'an honestly stayed aside and watched Pei Jia, the master, busy with his work.

There are four steps in quenching, and after the last time it is determined that the blade is no longer fine-tuned, it will be heated, annealed, tempered, and quenched.

In later generations, there was a complete heat treatment process, but this technology was simply impossible to achieve in this era.

In this regard, Pei Gean is only a theoretician, with no experience.

On the contrary, Zhao Dezhao had a lot of knowledge, and specially asked people to boil the quenched lard and cool it to about 80 degrees to 100 degrees before the final process.

This type of quenching, in which the oil is heated at a warm temperature, became popular in later generations because people were able to grasp the nuances.

However, in this era, we can only understand it in general terms. At most, they can tell the difference between oil cooling and water cooling, but they don't know that oil quenching at 80 degrees can better maintain the long-term stability of steel.

It took more than a month, until the beginning of August, Zhou Zhen and Pei Ge'an finally used the knowledge of later generations to gain a little in this world.

The two horizontal knives are one long and one short, about ninety-five centimeters long, the back of the knife is about one centimeter thick, and it weighs about ten catties, which is still a bit too heavy for Zhao Dezhao.

The short one is only about 80 centimeters, relatively thin and narrow, and at the same time, the weight has been reduced by nearly half, less than six pounds.

In fact, this weight is still a bit heavy for Zhao Dezhao, and ordinary steel knives weigh three or four catties at most.

Like the epee of the Olympic Games in later generations, it is only more than a pound.

And this is not yet the final weight, because the hilt of the sword also needs to be decorated, and the scabbard is also made.

The long horizontal knife is to be dedicated to Zhao Kuangyin, and some decoration needs to be added.

However, Zhao Dezhao believes that in a few more months at most, he will not care about this weight.

What's more, the heavier the knife, the more powerful it is.

"Husband, how can you thank me?"

"Everyone is yours, how can I thank you?"

Pei Ge'an was just joking, and said with a smile: "I miss the fourth sister, and I also want to go out to Kaifeng Mansion, and I haven't gone out to go out in this era." ”

Zhao Dezhao shook his head. "Almost all girls in this era don't go shopping, what do you want to eat, I'll buy it back for you, okay?"

She snorted coquettishly. "I'm just enjoying the vibe, you know?"

Zhao Dezhao thought for a while and said, "If you really want to, I will bring the fourth brother and the sixth sister with me at that time." ”

She nodded happily. "Hurry up and go to the fiefdom, we can't do anything in front of the emperor. Once I have gone to the fiefdom, I can burn glass and refine chemicals.

Just like the red powder I refined, I call it Flamingo, which is actually a synthesis of Bailang Duo and sulfonamides, and the toxicity in it is greater than the medicinal properties.

Don't you want to have sulfonamides? In this era, this is an absolute miracle medicine! ”

Of course Zhao Dezhao wanted to, but this matter was not in a hurry.

A clueless collision will only achieve half the result, and even endanger lives.

The knife has been made, Pei Jia also made a heart guard for Zhao Dezhao and Pei Ge'an, and Zhao Dezhao should also go back to Kaifeng Mansion.

Zhuangzi is only more than ten miles away from the East Palace, even if you take a carriage, it doesn't take an hour.

When I returned to the East Palace, I first arranged for someone to go to the palace to rule Wang Pu, and I didn't need to go to the farm tomorrow, just come to the East Palace directly.

In addition, Tong Liang was arranged, and he arranged for someone to find a shop in Kaifeng Mansion that specializes in making gift swords and ceremonial swords to come to the East Palace.

The sword was mainly a status symbol in this era, and only this kind of shop could be customized with a suitable scabbard.

Moreover, the folk shops are afraid of lack of gold and silver, let alone precious stones.

And although Zhao Dezhao doesn't have to decorate the gems, he can't simply send out the horizontal knife.

Loading gems will make Zhao Kuangyin feel extravagant, but it is also a sin not to show the emperor's style at all.

The easiest way is, of course, to give it to Zhao Kuangyin privately, and then let him arrange for a skilled craftsman to make the scabbard himself.

But in that case, why would he bother to make a horizontal knife?

There was a commotion outside, but it was the chamberlain Xue Xue who came out of the palace. "Second brother, when the official heard that you were back, he asked the minister to summon you to the palace dinner. I also asked the ministers to ask ......"

Speaking of this, Zhao Dezhao hurriedly got up and saluted Xue Zhu. "Ask that bastard boy, it is the right thing to go to the farm to cultivate himself and study hard, and the worst thing should be to organize the autumn harvest of the people, and he will only be mischievous, without any prince etiquette, and go to be a blacksmith, do you really want to be a blacksmith for the rest of your life?"

Zhao Dezhao was still thinking about the meaning of his words, but he heard Xue Zhi say again: "I have been a blacksmith for more than half a month, and I heard that I have made two good knives, and I brought them into the palace for me to see." ”

Zhao Dezhao was helpless, so he had to respond: "Obey the order......"

He knew that his subordinates were like a sieve, not to mention half of them, at least a small half of them were Zhao Kuangyin and Zhao Guangyi's eyeliner.

But being exposed to outsiders like no clothes in this way, he was still very unhappy in his heart.

When he was in the Ming Dynasty, Zhu Di really loved him and spoiled him, so he didn't care about Zhu Di's guardianship.

But he and Zhao Kuangyin couldn't feel the relationship between father and son at all, and they had to be subject to this kind of constraint.

Of course, since he wants to get benefits from Zhao Kuangyin, no matter how unhappy he is, he can only endure it first.

returned to the apse and confessed to Pei Ge'an, Zhao Dezhao took two knives and ten sets of nine consecutive rings and followed Xue Zhi into the palace.

Today, Zhao Kuangyin was not in his Funing Palace, but came to the Jingfu Hall where the fourth sister and her sisters lived.

When Zhao Dezhao arrived, he sat on a recliner in the shade of a tree, happy like a kind father.

The courtyard here in Gyeongbokgung Hall was assembled into a large paradise, in addition to the equipment that Zhao Dezhao had made at the beginning, he also asked people to make a lot of toys of this era, occupying half of this small courtyard.

The fourth brother Zhao Defang and the sixth sister are the happiest, and they can't wait to live like this every day.

However, thinking of the situation that "himself" later committed suicide and Zhao Defang was finally poisoned to death, the warmth in Zhao Dezhao's heart was also diluted a lot.

Although he seems to be a good father at this time, he never really cares about every child when it is born.

Most of the time they are left to fend for themselves, and when they are bored, they will remember to be happy, just like a few tool people.

"The child has seen Daddy......"

On the other side, the sixth sister saw Zhao Dezhao, the little guy was quite conscientious, and he didn't slide anymore, and stumbled over. "Second brother, second brother, I miss you."

Zhao Kuangyin smiled, his eyes were attracted by the horizontal knife without a scabbard, this pattern was indeed eye-catching.

His face became serious, he reached out and took the long knife from Tong Liang's hand, weighed it in his hand a few times, and then aimed at the recliner just now and slashed it.