In the last days, I am the factory

Chapter 69

Because there will be a nuclear bomb attack on Lefeng City tonight, Zheng Qian's plan is to drive to a factory in a county in the outer district to search for rare metals.In this way, even if you encounter trouble and cannot come back at night, you will be protected from the nuclear bomb.

But this time the little girl refused to let Zheng Qian drive, she yelled
"Either ride Sarilang, or I'll drive. Slow down. Anyway, if you drive again, I won't be on the mission!"

Zheng Qian couldn't screw the little girl up, so he had to let the little girl drive. This time, he chose a better Q7 automatic transmission. After a simple Baidu, the little girl finally got on the road steadily. At first, she was a little afraid to drive. , but after understanding the blessing of Zheng Qian's power, there will never be a car in front of him, and he will be much more reckless when driving.

Originally, there were a lot of cars congested on the provincial road along the way, and there were also many zombies, but the Q60 with a speed of more than 7 miles was directly smashed into the air.

Zheng Qian was still very nervous at the beginning, after all, she was the legendary female driver.But after driving for about 10 minutes, I put it down and started to learn about metals on my mobile phone, mainly alloys. After all, I was looking for rare metals this time, so I have to look at their uses.

I don’t know if I don’t look at it, but I am really a fool when I look at it. It turns out that apart from the carbon content of steel, it will affect the quality, such as the plasticity and ductility of low carbon, the comprehensive impact toughness and fatigue strength of medium carbon steel, and the hardness of high carbon steel.

In order to obtain better performance, steel needs to be heat treated for a certain period of time according to requirements, including annealing, normalizing, tempering, quenching and so on.The heat treatment process of these steels directly determines the properties of the steels.

Annealing can remove stress, uniform crystal particles, and improve the mechanical properties of steel structures.

The purpose of normalizing is also similar, and the types of steel materials are different.

The purpose of quenching is generally to increase hardness, but it cannot be generalized because there are many types of quenching processes and the purposes are different.

Tempering is to eliminate brittleness, uniform structure, and restore the mechanical properties after quenching.

Zheng Qian made up a lot of knowledge, and then tried to apply what he learned in his own mind to create. The first is a sub-eutectoid steel bar, which is stress-relieved and annealed to keep the toughness and continuously refine the crystal structure. Perform bainite austempering, medium temperature tempering, and repeat.

The hypereutectoid steel tooth-shaped casting is used as the blade, annealed, double-liquid quenched, low-temperature tempered, and the surface of the blade is carburized to produce ledeburite.

Finally, the entire blade is subjected to repeated cold and heat homogenization treatments to refine the crystal structure and adjust the mechanical properties.

Since I just choose the process and the operation is made by the system, the details of the process are the best.It's a pity that some chemical surface treatments require the unlocking of [Chemical Basics], otherwise, they will be galvanized.The effect of the whole knife will be very good.

This is just ordinary steel. If rare earth metals are added, the performance will be significantly improved.For example, a certain proportion of chromium and nickel can improve the toughness of the metal so that the toughness and strength are higher than ordinary steel.Niobium vanadium tungsten can improve the thermal strength and thermal hardness of steel and is suitable for tool steel and so on.

In addition, there are alloys, aluminum alloys, copper, etc.

The purpose of coming here this time is to collect these rare earth minerals that can improve the performance of metals.

When the little girl stopped the car, Zheng Qian was still immersed in the ocean of knowledge and almost drowned.Sometimes this kind of thing is like this. When you have no use for it, the words on the book in your hand are so dull and boring.However, when you really come into contact with these things, like a blind man, and encounter a wall in it, you will realize how pleasant it is to have someone tell you the direction.

Zheng Qian thought he had arrived, but when he looked up, he realized that in front of him was a roadblock made of cement poured from gasoline barrels.This made me a little confused. Could it be that there are also troops here who have set up defense points here?Never heard of it!
"How far is it from the destination?"

The little girl shook her head,

"It's not far away, there are only about 2 kilometers left, and the car should not be able to pass it. It will take about half an hour to walk."

Zheng Qian thought about it, maybe it is not necessary, just a few concrete blocks, if it is not cast in the ground, maybe his new battle armor can be removed.

Zheng Qian summoned his new armor, this armor full of steampunk style, it looks really cool.It seems that without a helmet, the protection is still not comprehensive enough.The vehicle obviously seemed to be sinking. Zheng Qian jumped out of the car and made himself a helmet and an exoskeleton so that he did not feel the heaviness of wearing armor. Instead, he felt as relaxed as if he was floating in the clouds. comfortable.

Walking in front of the concrete pier, Zheng Qian embraced it with both hands. With the sound of the gears spinning, the concrete pier was easily picked up without any effort. Zheng Qian waved his hand and threw the concrete pier more than 20 meters away. It fell to pieces.Zheng Qian was a little astonished at the dominance of this armor.

But it's a pity that this thing seems to be a little slow in responding.Make your movements look like a robot, one pause at a time.

Zheng Qian walked to the next concrete pier and was about to throw the second one. Unexpectedly, there was a bang, and he suddenly felt a tightness in his chest. When he looked down, a bullet hole appeared on one of his armor.

Fortunately, for safety, his armor was covered with a half-centimeter layer of hard steel.Otherwise, maybe this shot will leak his own steam pipe.

After the little girl heard the gunshot, she was the first to jump out of the car, picked up the crossbow in her hand, and approached Zheng Qian cautiously.

"Are you OK!"

Zheng Qian squeezed the bullet from his chest.

"Although it's a sniper rifle, it's not an anti-material type, otherwise my armor wouldn't be able to protect me."

Zheng Qian didn't dare to take it too seriously, so he directly added a large shield in his hand. At this time, he looked more like a good brother machine gunner in the interstellar world, but obviously his armor was not as advanced as the opponent's.

Turning his gaze to the seemingly empty street, everything here is dead quiet, there is no sound at all, in this era where the world is full of living dead, it is a bit too quiet here, there is not even a corpse .

boom!There was the same gunshot again, and the bullet passed through the little girl's body and hit the Q7 behind her.Zheng Qian was very careful this time, so he probably heard the location of the gunshot clearly.

Looking around, it turned out to be a community, and the floors were all seventeenth or eighteenth floor, which made Zheng Qian a little confused.With so many buildings, how can he determine where the other party fired the shot?After hesitating for a moment, I felt that the other party couldn't hurt either of us anyway, so why not just drive over and forget it.It would be a waste of time to look for him.
At this moment, there was a bang, buzzing sound, as if someone hit the head with a hammer. I was a little confused, and it took me a long time to react.A bullet hit his helmet directly. Fortunately, he had the foresight, otherwise it would be over. The first word that came to his mind after he woke up a little.

"Kill him!"

(End of this chapter)