Great Power Industry: You're a private company building an aircraft carrier?

Carburizing high-carbon steel and alloy steel is not very meaningful, since carburizing is for increasing strength.

Simply put, carburizing is the process of allowing carbon atoms to penetrate into the surface layer of steel.

In this way, the base material, which is originally low-carbon steel, also has the hardness and wear resistance of high-carbon steel on the surface.

Meanwhile, the interior of the workpiece is made of low-carbon steel, retaining its original toughness and plasticity.

For manufacturing low-speed parts like steering gears that also need to be impact-resistant, carburized low-carbon steel is the most suitable material!

The parts were placed into the gas carburizing furnace, and the carburizing process began. Qin Chuan didn't hold back at all and shared these techniques with everyone present.

After all, they took 500,000 yuan from the Yellow River Factory, so they had to feel that the money wasn't wasted.

The veteran craftsmen's gazes quickly turned to one of utmost respect, and some even pulled out notebooks to take notes.

Once you've learned a skill, it's yours to keep. You can not only become a top technical expert in the factory, but also be hired as a consultant by other smaller factories, and earn money that way!

"There are four similar techniques: carburizing, carbonitriding, nitriding, and nitrocarbonizing..."

"Engineer Qin, the temperature inside the gas carburizing furnace has already reached 800 degrees Celsius!"

"Continue heating to 950, then enter continuous heat preservation mode."

"Nine hundred and fifty? The temperature in German technology is only eight hundred and eighty."

"That was German technology from twenty years ago; even today's German technology is still 950."

"However, the Germans certainly won't tell us that the technology they sell us is outdated, and we can only develop advanced technology ourselves," Qin Chuan said.

Pan Yunfei was completely marginalized and could only stand there fuming. Qin Chuan's words deeply stung him, yet he couldn't vent his anger.

"Uncle, Uncle!" Just then, a voice rang out.

Pan Yunfei turned his head and saw a head peeking out furtively from the doorway. It was his nephew, Pan San. At this moment, everyone was focused on learning and had no time to pay attention to anything else.

Pan Yunfei slowly withdrew.

"uncle!"

"What are you here for?"

“Uncle, I heard that Qin Chuan is showing off. We don’t care if he shows off, but if he dares to act tough by stepping on you, I, Pan San, will be the first to not let him get away with it! I’ve already…”

Hearing Pan San's words, Pan Yunfei's expression suddenly changed: "This, isn't this unnecessary? It's just a verbal dispute, you..."

"Hmph, in short, bullying your uncle is unacceptable, I'll make him pay the price!"

"Uncle, you don't need to worry about it. I'll take the blame if anything happens!" Pan San said fiercely.

"This……"

"Uncle, we can only go abroad if we ruin their plans. Auntie is still waiting to buy a color TV from Germany!"

Pan Yunfei glanced inside again, and seeing Qin Chuan's vivid figure introducing the group to everyone, he felt another wave of nausea.

"Then you have to be careful. You have to make it look like an accident. If you let it slip, you'll be in big trouble!"

"Ok!"

One hour, two hours, four hours...

After lunch, another two hours passed...

“Carburization depth is related to time. We have been carburizing for seven hours, and the penetration depth should be more than one millimeter.”

“If you feel it’s not enough, you can continue the process for up to fifteen hours. A depth of two millimeters is more than enough. It’s getting late, so let’s stop carburizing here. Next, we’ll do quenching,” Qin Chuan said.

“Master Qin, we’ve already cleared out a furnace for you. It’s a bit wasteful to use it to heat these parts, but it’s necessary,” Yuan Limin said.

The change in address, from Xiao Chuan to Engineer Qin, and then to Master Qin, reflects the shift in everyone's attitude towards Qin Chuan.

There is a sequence of hearing the truth, and there is a specialization in the surgery industry.

Qin Chuan is more capable than them, so they call Qin Chuan "Master" and they are completely convinced!

Pan Yunfei felt his heart pounding, knowing that a production accident was about to happen, and that this young man in front of him would be involved...

He didn't really want to do this, but his wife kept insisting on buying a color TV from Germany, so he had no choice!

Moreover, this young man in front of him had previously humiliated him severely!

"A regular furnace won't do; we need a high-frequency furnace."

Qin Chuan said, "Our Yellow River Factory is a big factory, it should have high-frequency furnaces, right?"

What? A high-frequency furnace?

Pan Yunfei was immediately dumbfounded. So, the following arrangements were meaningless?

"Yes, but..."

"But what?"

"The experienced workers in the factory don't know how to use it."

"If you don't know how to use it, just plug it in, it's very user-friendly."

In later generations, those who livestreamed the making of kitchen knives could see the knife being inserted into a curved tube, and the blade would magically turn red, as if it were heating itself.

Moreover, only the blade turned red, while the other parts remained normal.

After heating it until it's red-hot, you throw it into water, and the quenching is complete. After all, the quenching process in the East involves heating it until it's red-hot and then throwing it into water.

This is actually a high-frequency furnace. Inside that round tube is a coil. The coil is connected to high-frequency alternating current. When the workpiece is placed in the center of the coil, an induced current, or eddy current, is generated inside the workpiece, which quickly heats it up.

It heats up quickly, is easy to operate, and allows you to select the heating depth as needed.

If you throw a workpiece into a steelmaking furnace, the entire workpiece will be at a uniform temperature. But now, only one part is heated, while the rest remains in its original state.

Just like carburized low-carbon steel, it's soft inside and hard outside!

"We need to select different frequencies depending on the thickness of the quenching process."

"For hardened layers less than 16 mm, choose high frequency; for layers greater than 16 mm, choose medium frequency. The specific options should be in the instruction manual..."

As Qin Chuan explained, he walked into the warehouse and looked at the equipment covered with a thick layer of dust, feeling a sense of感慨 (gan3kai3, a complex emotion encompassing both emotion and reflection).

What a loss! I should have known better than to try and earn that 500,000.

I'd rather spend 500,000 yuan to buy this equipment; it's German-made, top-notch quality!

"This was purchased from abroad when we were preparing for the Masteel project, but after we brought it back, nobody knew how to use it. The experienced craftsmen were still used to using the original quenching process, so..."

Yuan Limin seemed to know what Qin Chuan was thinking and quickly explained.

"That's why I'm here. Now, I'll teach you how to use it. From now on, we'll use it for surface hardening!"

In a certain electric furnace workshop, Pan San stood in a corner, looking up at the tall overhead crane, then turning his head to look longingly at the entrance.

Creating a production accident isn't that difficult.

Later, those people will come and heat it with an electric furnace and then quench it. Then, at the right time, they will insert a special U-shaped wire into the socket next to it, which will short-circuit the circuit and cause the goods being transported on the crane to fall down...

But no one showed up, no matter how long they waited.

Finally, a familiar figure appeared at the door.

"Uncle! It's you! Where are the others?"

"The workpiece has been completed, and Qin Chuan has already left."

"gone?"