Li Zhenhua rummaged around the house, and he remembered that before he left school, he put away all the things he needed to use.

He soon found several barrels of sealed liquid, and through the plastic barrels, he saw that the liquid inside was flowing very slowly as he moved.

Li Zhenhua took out a bucket and opened the lid to look inside.

Seeing that the barrel was filled with a black viscous liquid, Li Zhenhua checked the contents of the barrel.

Seeing that there was no problem, he nodded with satisfaction and walked out of the room with two buckets of liquid.

Back next to the stove, there is a rectangular iron sink next to the stove.

At this time, there was nothing in it, Li Zhenhua opened a bucket and poured it into the sink.

Just when Li Zhenhua wanted to pour the second bucket, his analytical eye gave a hint again.

I saw a line of prompts appear in his sight:

'Diesel and engine oil mixtures, which can be used for steel quenching coolant.

The current ratio of the two is not optimal, so continue to add oil to it. ’

This hint made him feel that having an eye for analysis was really beneficial.

For such a quenching coolant problem, this eye can give the best ratio.

Li Zhenhua returned to the room and took out a 2L red keg again, which contained engine oil.

This is the waste engine oil that Li Zhenhua asked for in the car repair shop in the town before.

It was also that there was no place to dispose of the waste engine oil at that time, so it could be taken away by Li Zhenhua.

If this had been put on hold until now, there would have been no place to dispose of this used engine oil.

Returning to the sink, Li Zhenhua unscrewed the lid of the bucket.

Then he found the waste engine oil inside, and his eyes were also giving hints from time to time.

'Oil difference: 1200ml, 800ml··· 100ml、40ml、1ml。

If there is too much oil, please add diesel; Current diesel difference: 2ml. ’

It turned out to be fierce, which also led to missing the best ratio.

I added some diesel fuel to the small ones inside, and poured more diesel fuel into the province.

Finally, in Li Zhenhua's hands, the sudden fire coolant was adjusted to the best ratio.

The quenching thing was ready, and now only the actual operation remained, Li Zhenhua returned to the furnace and clamped out the knife blank.

Looking at the hints given by the eyes, the temperature of the knife blank is slightly higher at this time.

Li Zhenhua could only stand there with the knife blank in his hand, waiting for the temperature to drop, and he was also ready to insert the knife blank into the quenching coolant at any time.

The temperature finally dropped to the optimal temperature, Li Zhenhua did not hesitate, and the knife blank was directly inserted into the coolant.

I saw that the coolant in the sink caught fire directly. Along with the flames, the smell of burning oil was in the air.

Please take out the blank and count down to ten seconds, 3, 2, 1. ’

Li Zhenhua immediately clamped out the knife blank, and the quenched knife blank was not very good-looking at this time.

The surface of the knife blank is black and unusually ugly.

Li Zhenhua took the knife blank in his hand and observed it carefully, and at this moment, words appeared next to the knife blank.

"Watermelon knife (semi-finished),

Length: 430mm, Width: 45mm,

Full weight: 750g, hardness: 62,

Toughness: Tempering is not completed, this data is incomplete, and the tempering process needs to be carried out. ”

Li Zhenhua didn't expect that he just wanted to experiment with another of his loaded functions.

But since he made this watermelon knife by himself, the next development has become more and more out of his expectations.

If only the watermelon knife had been done as prompted by the Eye of Analysis.

Not to mention killing watermelons, even killing people is a piece of cake, maybe this watermelon knife is of better quality than the small daggers sold on the market.

Li Zhenhua actually wants to know what this watermelon knife will be made into by him in the end.

Therefore, Li Zhenhua intends to strictly follow the prompts of the Eye of Analysis.

'Please prepare the tempering solution next, raw materials: diesel, engine oil. ’

Li Zhenhua strictly followed the prompts and prepared the solution for tempering.

Li Zhenhua, a blacksmith who is a family heirloom, of course, knows how to temper, so he took out a thin rectangular barrel and poured the solution into it.

Then he squatted the bucket on top of the stove, and Li Zhenhua carefully controlled the fire.

until the temperature of the solution is burned to near the ignition point.

Li Zhenhua maintained the temperature and fixed the knife blank on the solution barrel with iron wire.

Then there was a long two-hour wait, where the blank was placed in a solution and maintained at 220 degrees Celsius for more than two hours.

Li Zhenhua finally took him off the stove.

The next thing is to continue to wait for the knife blank to slowly cool down in the solution.

When the knife blank drops to room temperature, the tempering process is completed.

Quenching gives the knife blank hardness, tempering makes the knife blank tough, and a watermelon knife is made.

Let Li Zhenhua do it directly in the way of the weapon level.

The sky darkened when Li Zhenhua kept the temperature of the watermelon knife, and Li Zhenhua didn't plan to keep watching.

Instead, put it there to cool down naturally. The sun went down, and it was time for Li Zhenhua to eat again, but for him, the experience of this day was simply amazing.

Just sold a scythe, and actually sold himself a gold finger.

Li Zhenhua took a large number of chopsticks noodles with chopsticks and put them in his mouth.

"It seems that I have been a blacksmith all my life, if I don't have this blacksmith, I feel that this golden finger will leave me immediately."

After eating, Li Zhenhua walked to the stove and looked at the knife blank in the tempering solution.

The dialog box in the eye shows the temperature of the knife blank at 43°C.

Seeing this temperature, Li Zhenhua knew that it could actually be fished out of the solution.

Put on the gloves, take the wire hanging from the side of the barrel, and take the knife out of the barrel.

I saw that the knife body was full of mixed oil solution, put the knife blank on a rag that had been prepared a long time ago, and wipe off the solution on the knife blank with the cloth.

The color of the knife blank was presented in front of Li Zhenhua's eyes, and the color of the knife blank was still that silver-gray, and it was a little black.

Li Zhenhua looked at the hint in his eyes.

"Watermelon knife (3/4 finished product),

Length: 430mm, Width: 45mm,

Full weight: 750g, hardness: 62,

Toughness: good (this value is more complicated, and the specific value is not quantified for the time being). ”

The blade has been forged at this time, and the next step is a process of opening V and cutting the blade for the blade.

These two programs, with the assistance of machines, are already very convenient for blacksmiths.

However, if you want to do these two processes well, it is still a little difficult to reach the level of blowing and breaking hair.

Li Zhenhua came to the table next to the anvil and put the knife blank on it.

Originally, he wanted to use the caliper to find the center of the blade, then draw the line and then turn on the V on the belt grinder.

But at one point, the Analytical Eye came into play.

Li Zhenhua didn't need to draw the line, walked to the side of the belt sander, and clamped the knife blank on the fixture.

Open the machine by hand, the belt grinder rotates, Li Zhenhua holds the fixture with his hand and sends the knife blank to the belt grinder.

When the knife blank comes into contact with the belt grinding machine, the friction between the belt grinding machine and the knife blank produces many iron filings and sparks.

The knife blank gradually formed a V-shape in Li Zhenhua's hands, and it became more and more decent.

Wait until the last eye prompt appears, and the high-waist flat grinding V is completed, and the next step is the next step, manual secondary cutting.

After completing this step, the whole watermelon knife is no longer the color it used to be, and when the V is opened, the belt grinder has sharpened the color of the steel.

It's half bright silver now, as long as the rest of it doesn't get the same color as before.

Li Zhenhua took the knife blank to a corner of the courtyard, where a long bench was placed.

The bench is inlaid with a whetstone, which is said to be older than his age.

Li Zhenhua straddled the bench and began to sharpen it little by little with a knife.