Bright Sword: Starting from the Improved Grenade

Three days later, Zhao Tianyang put down the malachite in his hand and brought Li Tie and Chang San to the coking oven.

"How is it? Can it be used now?"

Zhao Tianyang asked Li Tie who had just finished inspecting the coking oven.

"That's it!"

Li Tie dusted off his hands and nodded.

"Then start coking, add charcoal and coal!"

Zhao Tianyang waved his hand, and six workers brought baskets of coal into the carbonization chamber.

"ignition."

After a while, seeing that the carbonization chamber was full, Zhao Tianyang immediately gave orders.

As a match fell into the hay, a raging fire broke out in the combustion chamber. According to Yang Ming, the entire coking process would last 14 to 24 hours.

During this period, the coking oven must be staffed with people, and someone must be on duty at all times to observe the temperature changes inside the oven.

(Also, the furnace needs to be baked before coking, which usually takes more than 70 days. It takes too long, so I will just treat it as a speed-up for the protagonist.)

A day later, as the coke came out of the furnace, Zhao Tianyang began formal steelmaking.

First, the purchased iron ore, limestone, and coke are poured into the blast furnace from the charging port at the top of the blast furnace at one time, then ignited, and air is blown into the furnace with a blower to accelerate the combustion of the coke.

"Don't stop, keep going."

Zhao Tianyang came down from the ladder and looked at Chang San, who looked exhausted. He rolled his eyes speechlessly and said, "You can't even press the blower. What have you been busy with these days?"

"Hahaha......"

Everyone present laughed when they heard this.

"Director, you don't know that Master Chang's wife wants to have a second child these days, so she leaves work early every day."

An employee who knew the situation quickly broke the news.

"What nonsense are you talking about!"

Chang San blushed: "I'm not tired. I'm a blacksmith and I'm strong. How can I feel weak after doing that?"

"Yes, yes, you are the strongest!"

Zhao Tianyang agreed casually and pointed at the crowd: "Who is that, please replace our Master Xu, oh no, Master Chang, the blower cannot stop!"

"Hahaha....."

"I've already said it's not fake, how can the blacksmith's business be considered fake!!"

After another round of laughter, everyone began to take turns pressing the blower.

Because it takes a long time to melt iron ore, Zhao Tianyang arranged for everyone to take turns guarding the blast furnace, and then returned to the tent to continue tinkering with the light-emitting diodes.

This thing is quite difficult to explain. Originally, he wanted to make a glow tube, but Liu Ransheng found the malachite, so he decided to give it a try and experiment.

First, take out the battery that was removed from the plane last time, then connect the wires, with the positive pole directly contacting the malachite and the negative pole touching the mineral. You will be successful if you find the glowing point.

The next morning, just as Zhao Tianyang was looking at the light-emitting diode he had just made and nodding with satisfaction, Chang San ran over excitedly.

"The factory manager's iron ore has melted."

"Really? Let's go check it out!"

As he said that, Zhao Tianyang stood up and ran towards the blast furnace.

When he arrived at the blast furnace, he climbed up the ladder and looked into the furnace without saying a word.

Under the scorching heat, the red iron ore began to soften and turned into molten iron.

"Quickly bring the iron ore powder over here and pour it in."

After pouring the iron ore powder into the furnace, Zhao Tianyang picked up the stirring rod and began to stir the molten iron continuously, using the iron ore powder and oxygen in the air to remove some of the carbon in the molten iron, so that steel could be obtained directly.

Because the whole process involves constant stir-frying like cooking, it is named the "Stir-frying Steel Method".

It is worth mentioning that the method of stir-frying steel was invented in the middle of the Western Han Dynasty, but the name of the method was not determined until the Ming Dynasty. It can only be said that it was more than a thousand years ahead of the world.

The steel obtained by the steel frying method is mostly low-carbon steel with a carbon content of less than 0.25%. By controlling the added iron ore powder, medium-carbon steel and high-carbon steel can also be obtained. It is also very simple to distinguish what kind of steel you have obtained.

Low carbon steel has good weldability and plasticity and is the softest steel. By the way, this steel can be directly pressed into thin plate steel, which is very suitable for manufacturing PPSh, a submachine gun with simple conditions.

Medium carbon steel has a carbon content between 0.25% and 0.60%, has high strength and hardness, and can be used to manufacture gears, shafts and other heavy-loaded parts.

You can tell the difference between low carbon steel and medium carbon steel by tapping with a hammer.

High carbon steel has a carbon content higher than 0.60%, high hardness and wear resistance, and can be used to manufacture cutting tools, molds, knives, etc.

The method of identification is to take medium carbon steel and high carbon steel, put them on stones or something hard and rough and rub them madly to separate the braids.

In the evening, feeling that it was almost done, Zhao Tianyang added nickel to the molten iron again.

Remember that the nickel content in steel must be kept below 4%, so to add how much nickel, you just need to calculate how much molten steel is in the furnace.

If it really doesn't work, first let the molten steel out to cool it down, then weigh and calculate it, and then put it into the blast furnace to re-smelt it.

Of course, adding different types of rare metals or substances can also produce different stainless steels.

Adding nickel can produce nickel-chromium stainless steel, adding manganese can produce chromium-manganese-nitrogen stainless steel, and adding chromium can produce ferritic-iron stainless steel.

There are many types of stainless steel. After establishing a special steel plant, Zhao Tianyang will find people to experiment with these stainless steels one by one.

After a moment, looking at the molten steel flowing out of the iron outlet, Zhao Tianyang breathed a sigh of relief and wiped the sweat from his head.

"It's getting late, let's stop here for today, everyone go back and rest."

"Yes."

"Then we'll leave first, Director."

After everyone left, Zhao Tianyang looked at the molten steel that was divided into sections by the cement pool and returned to the tent.

Now that nickel-chromium stainless steel is out, he has to consider how to draw nickel-chromium stainless steel into wire.

In the tent, Zhao Tianyang thought for a while and wrote down the first step of nickel-chromium stainless steel wire drawing on a piece of white paper: "hot rolling".

Heat the nickel-chromium stainless steel and then use a machine to press it into steel coils. Since there was no rolling machine, Zhao Tianyang chose the method used by the Eighth Route Army to make cannons.

When the nickel-chromium stainless steel has just hardened but the temperature has not yet dropped, a large iron ingot is lifted up using a tripod and the acceleration of gravity is used to smash the nickel-chromium stainless steel into a thin steel coil.

The second step is annealing. After annealing, the thin steel coil is placed in a cutting lathe and cut into appropriate specifications.

The third step is to put the nickel-chromium stainless steel into the wire drawing equipment for wire drawing. Thinking of the wire drawing equipment, Zhao Tianyang drew another picture and asked someone to send it to Shen Hong, asking him to make the wire drawing equipment as soon as possible.

Fortunately, this thing is relatively simple, otherwise Zhao Tianyang would have no choice but to buy the equipment.

The fourth step is to anneal the drawn nickel-chromium stainless steel again, and then put it into the wire drawing equipment for wire drawing, and then obtain the finished product, nickel-chromium wire.

Because of the wire drawing equipment, Zhao Tianyang waited for another three days and started the wire drawing work after getting the equipment from Shen Hong.

After two days of hard work following the wire drawing steps he wrote, Zhao Tianyang couldn't contain his excitement as he looked at the 3 mm nickel-chromium wire in his hand.

It’s not easy, but I finally made this little thing. The next step is to use nickel-chromium wire to wind a nickel-chromium alloy resistor.