Bright Sword Military System

Chapter 100 The Fire
Wang Xuexin was called by Zhang Wanhe on the seventh day.

This is because Su Xin and others found in the previous process of white heart toughening that the use of earthen smoldering technology can improve the toughening effect of shell casings.

The so-called "smothering" means that the furnace is closed, kept for a period of time and then cooled naturally with the furnace.

The entire smoldering process takes three to four days, plus the previous combustion and heating, a total of six to eight days for one toughening.

Since white heart toughening can get better results, it is natural to use black heart toughening.

This also makes Wang Xuexin sigh that the wisdom of the masses is infinite. The toughening technology from Germany and the United States, coupled with the local method of smoldering, is a veritable combination of foreign soil and Chinese and Western cultures.

It was a security guard who came to inform Wang Xuexin.

Tunnel warfare is a high-level secret, and even Zhang Wanhe has no right to contact it and can only tell it through the guards.

At that time, Wang Xuexin and Lao Hei were studying how to dig tunnels in the mountains.

The tunnel system is much more complicated than the tunnel, and it also cooperates with the tunnel, so it is not so easy to toss.

As soon as he heard the report of the guards, Wang Xuexin hurried to the burning stove area in the north of the village, throwing down the mountain hoe.

When we arrived at the place, Zhang Wanhe, Su Xin and the other directors were already waiting anxiously, and they shouted at Wang Xuexin from afar:
"Little Northeast, I'll be waiting for you!"

"The first furnace is opened today, and everyone is not at ease when you are not here!"

"I don't know if the toughening will be successful this time, why are you not in a hurry?"

……

Everyone's nervous look really smells like an elixir.

With Zhang Wanhe's order, the old master shoveled off the seal and opened the furnace.

Because of the smoldering technique, it cooled down naturally, and the temperature inside had dropped to room temperature. Several people helped the old master to lift the iron box out of the iron box smoothly.

Remove the sealing mud on the box mouth, open the box cover and take a look, everyone's eyes light up.

The broken iron blocks on the top layer are already a little different. I can't tell the difference, but it feels more like steel.

Zhang Wanhe slowly pulled apart the broken iron blocks and refractory bricks that covered it, and muttered to himself, "Don't worry, don't worry, we have to look inside to find out. It's been so many days, no... not a little while..."

Although he said so, the hand holding the tongs was trembling.

As the refractory bricks were smashed open, the heads of several shell casings emerged from one side, and everyone snorted softly, only to see that the shells exuded an attractive silver-gray metallic luster, which was not seen in Bai Xin Toughening before.

Su Xin, who had already prepared with her notebook, said excitedly while writing: "Box [-], the five shell casings on the first layer have no oxidative peeling."

Zhang Wanhe carefully tapped on the shell casing with tongs, tapped again, and then a smile appeared on his face, and said, "This matter probably didn't escape!"

Hardware is relatively sensible, he said: "What is it, you have to turn it on a machine tool to count it!"

"Come on!" Zhang Wanhe raised his head confidently and said, "Guaranteed to do it!"

As Zhang Wanhe said, when he got on the machine tool, the hardware nodded and said, "The toughening is uniform and the toughness is moderate, which is much better than Baixin's toughening!"

The crowd cheered for a while.

Zhang Ruozhong danced and took off the peaked cap on his head and threw it high into the air.

The medicine jar rushed up and held Wang Xuexin's hand tightly, and kept saying "Thank you, Comrade Wang Xuexin, thank you!".

Zhang Wanhe gently stroked the shell casings in the iron box, his face full of kindness and smile, as if he was touching the back of his child's head.

Looking at Su Xin, she found that she was secretly wiping her tears.

"Hey..." Wang Xuexin said with a smile: "Can you do it? Isn't it just the toughening technique? If you don't know, you think someone is bullying you!"

Seeing Su Xin like that, everyone laughed.

"Of course you can't do it!" Su Xin replied embarrassingly with red eyes and a crying voice: "You can solve it with just a few words like this, but others have tossed it for many years and haven't figured it out!"

Zhang Wanhe comforted: "Okay, didn't we fix it? Just fix it!"

Then Zhang Wanhe seemed to remember something and asked, "No one wants to see what the grenade looks like?"

In fact, don't look at it, the shell of the shell is toughened into such a grenade.

The main reason is that this operation is not directly burned in the fire like white heart toughening, and there is no peeling of the oxide layer, so the weak part of the groove is not easy to be burned through.

As it turned out, the grenades were also perfectly shiny with metallic colors.

The next job is easy, put gunpowder in it, install the wooden handle and pull the fuse, and the grenade comes out without much effort, and then there is the question of experimental testing.

Another advantage of the black heart toughening technology is that the size can be estimated.

The previous white heart toughening technology has oxidation peeling to varying degrees... Although some shell casings cannot see oxidation peeling, they have actually peeled off or a small amount of peeling can not be detected by the naked eye, and the actual size has changed.

So even if the shells are all the same size when they are put into the furnace, they are all kinds of strange when they come out of the furnace. One hundred shells have one hundred sizes.

This will cause great difficulties in producing artillery shells and even artillery... All of them need to be manually measured, classified and matched. A small amount of production is OK, but if there are too many artillery shells, it is almost impossible to complete the task.

Black heart toughening does not have this problem, and the size after toughening is all fixed and predictable.

Su Xin found through measurement that the volume first decreased by 1% after sand casting, and then expanded a little after toughening, and the volume expansion was different with the degree of toughening.

Insufficient toughening has less expansion, less neutral carbon precipitation, and the cartridge case is hard, brittle, easy to crack, and difficult to process.

Excessive toughening has more expansion, too much neutral carbon precipitation, which affects the strength, and the shell is crispy, which is also difficult to process.

So Su Xin made a card size template. During operation, she only needs to plug the toughened shells into the card size template. If it is too big or small, she will immediately know whether the toughening degree is not enough or too much.

Grenades are not as strict as cannonballs. Big or small, crisp or crisp have little effect. After the experiment, the killing radius can reach [-] meters, which made Su Xin and others happy for a while.

Zhang Wanhe was proud of this, and he immediately called Li Yunlong: "I said Lao Li, aren't you waiting to collect rent? Hurry up, I'm not waiting for anyone!"

He hung up the phone without waiting for Li Yunlong to answer.

Zhang Wanhe is so proud in his heart!

Look at you, Li Yunlong, all day long, I say that I will delay the work by making a grenade in the border area.

It is now dozens of bombs, which is not much less than the devil's grenade.

This time, I'm going to show you, Li Yunlong, to see how you swallow all those words from the past!

(End of this chapter)