Will it be affected if the quenched iron parts are exposed to rain? Probably yes.

The rain was falling harder and harder. In order to prevent the steel bars from getting wet, Li Mengxi ordered everyone to wrap the steel bars in their clothes and run back to the city.

Back in the city, he collected all the more than a thousand steel bars and piled them all over the house.

Guan Yu brought a piece of linen cloth to wipe away the rainwater. Li Mengxi wiped his hair with the linen cloth absentmindedly. He looked at the results on the ground with excitement.

This is more than a thousand quenched steel bars, and these are batch quenched.

It would be amazing if the method of batch and even heating using a fire tank was effective.

In the forging process of iron parts, quenching is a big problem. Inexperienced blacksmiths have a high quenching failure rate, but experienced craftsmen not only have a high success rate, but also control the heat well and can quench quickly and well.

A fire tank with a length of more than 300 feet is used to demarcate more than a thousand workstations, spread with balanced charcoal, and then heat it for the same time and quench at the same time. This new working method means that the reduction of labor costs can be minimized.

The dilemma of insufficient skilled craftsmen.

Because the fire tank is heated evenly, the heating progress of thousands of steel bars is very close. At this time, there is no need for too many craftsmen. Only one most experienced craftsman is responsible for controlling the heat and giving unified orders for quenching when the heat is reached. In this way, thousands of steel bars are heated uniformly.

Eight hundred people are equivalent to mastering the heat, which is a thousand-fold increase in quenching efficiency.

One thousand skilled blacksmiths and one skilled blacksmith with nine hundred and nine ordinary people, the labor cost between the two is very different.

After Li Mengxi wiped the water from his hair, he naturally handed the linen cloth to the knifesmith on the side and said with a smile, "Wipe off the water."

The craftsman was stunned for a moment, and then hurriedly took it. He was quite flattered. Li Mengxi had no respect in his eyes, and he treated people peacefully, always making people feel like spring breeze.

After the knife-forging craftsman wiped and wiped it, his wet hair was finally turned into a mess like a tangle of grass. Li Mengxi suppressed a smile, pointed at a pile of quenched steel bars, and said, "Take a look, please.

How is this pile of iron tempered? Let’s pick out the bad ones among them.”

The knifemaker handed back the handkerchief and took the order to get busy.

There are more than a thousand steel bars. The swordsmith's inspection method is very simple. Every time he picks up a steel bar, he turns it over from top to bottom and looks at it twice. First, check whether there is any cracking or major deformation after quenching.

Then, after the first step of inspection, take the steel bar and break it slightly on both sides to see the toughness. In the third step, take the two steel bars and tap each other a few times to judge the toughness.

The finished products, which amounted to more than a thousand pieces, were carefully selected by the knife maker and completed in a short time.

Among them, there are less than 60 defective products with cracks and large deformations. A rough calculation shows that the quenching success rate is over 90%.

The swordsmith is an expert. After checking the steel bars, the quenching quality of more than a thousand steel bars is surprisingly close. You must know that many of the people who help with quenching are not blacksmiths at all. They can't even hold pliers well, but...

In this way, a group of people with no skills suddenly reached the tempering level of a master craftsman, and the swordsman immediately realized the huge use of this.

The swordsmith looked at Li Mengxi with admiration in his eyes. With admiration, he suggested, "Military advisor, how about we all use this method to temper steel in the future?"

Li Mengxi thought for a moment, smiled and shook his head, "I'm afraid that's wrong," he looked at the knifemaker with an expectant look on his face and explained, "Cast iron is not bad. Cast iron parts are made from the same mold, and the thickness and size are the same. Malleable iron

No, if you want to make a knife, this person's knife is three feet long, that knife is three feet three long, this knife is eight points thick, that knife is six points thick, the length and thickness cannot be unified.

You also know about quenching. The iron is hotter and cooler, and the difference in quenching is huge."

Li Mengxi rejected the proposal to use a fire tank for batch quenching, and the knife forger scratched his head in embarrassment.

Just as the knifemaker was embarrassed, a military ticket was handed over.

The knifemaker took a look at the military ticket with confusion, and it was written on it, "Reward of one hundred catties of grain".

Li Mengxi put his pen away and explained with a smile, "Although the fire tank cannot be used to heat wrought iron, you have reminded me that it cannot be used to heat wrought iron, but this method can be used for cast iron parts."

"Furthermore", Li Mengxi smiled slightly, his eyes shining with confidence, "Although the thickness of wrought iron is difficult to determine, but who says that wrought iron cannot be heated together for thousands of times, it can be done!"

Casting and forging are two very different processes. Casting can use molds, which can produce hundreds of identical workpieces, but for forging, the blacksmiths add a little more iron, a little less iron, and use one more hammer and one less hammer.

The forging process relies entirely on experience. Therefore, even if the weight and size of the sword are specified, once the forging is completed, the thickness, length and weight of the finished product will inevitably vary greatly.

This is why Li Mengxi initially thought that only castings could be heat treated, but not forgings.

The reason why forgings cannot be heat treated in batches is that it is difficult for hundreds of forgings to have the same thickness and length. But thinking about it conversely, as long as there is a way to make forgings the same, swords can also be heat treated in batches.

Li Mengxi thought that the solution was to win with scale.

During forging, although the swords of the same size are specified, the craftsman makes ten swords, each with ten lengths and thicknesses.

However, no matter how big the error is, it is still within a small range. The rule is that a three-foot-long sword will generally be three feet-one, three-foot-two, or two-foot-eight or two-foot-nine in the hands of craftsmen.

The length will not be the prescribed three feet at all, and the result will be a two-foot or four-foot sword.

So, although the error is large, the error range is actually relatively small.

So, if the craftsmen make ten swords, it is very likely that the ten swords will be of different thicknesses and weights. However, when the number reaches a hundred, there will always be three or five swords that are very similar in thickness and length.

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And if all the craftsmen's works and thousands of swords were collected together and compared, under such a huge base, there would be as many as thirty or fifty swords of the same thickness and length in each specification.

This chapter is not over yet, please click on the next page to continue reading! Look, batch heat treatment requires iron parts of the same specification, and the iron parts will come out soon.

This is the method of big industry.

Li Mengxi was able to come up with this ingenious and intelligent method because of a difficult and difficult lesson in college.

There is a course in college called Advanced Mathematics.

As a poor student, Li Mengxi never passed high school mathematics.

But the only important thing he learned was in advanced mathematics classes.

Li Mengxi clearly remembered that it was a section on collection and distribution in advanced mathematics, and when explaining collection and distribution, the well-qualified university professor with a military scientific research background explained a vivid example.

That was during the Republic's two-bomb and one-star project. The Republic's industrial foundation was extremely poor and its machining accuracy was insufficient. Many high-precision parts could not be produced at all.

At this time, Qian Xuesen, the person in charge of the project plan, came up with a solution. He ordered that 10,000 pieces of each part be produced.

Then, using this method, we successfully produced usable high-precision parts under an extremely poor industrial foundation.

The method is very simple. Since the processing accuracy is not enough, just produce 10,000 pieces and the problem will be solved.

However, why is this? Why can’t the accuracy be achieved, but the problem is solved by producing 10,000 units?

The hidden truth behind this is - discreteness.

What is discreteness?

To put it simply, if your processing accuracy is not enough and you can only finish machining with an accuracy of one millimeter, then it is inevitable that in your production process, the accuracy of all your workpieces will fluctuate around 1 millimeter.

The parts must be,

【0.98】【0.99】【1.00】

【1.01】,【1.02】,【1.03】

It must fluctuate up and down around a millimeter.

And this fluctuation is discreteness.

Well, suppose you need a part with a processing accuracy of 1.000 mm, but your technical foundation can only process 1 mm, which is wrong by several orders of magnitude. What should you do at this time?

Using the discrete principle, 10,000 parts of one millimeter can be directly made.

Then, among such a huge number of 10,000, these 10,000 parts must be discrete and fluctuating.

Among enough data discretes, there must be one that happens to be the standard 1.000 mm.

Therefore, using this method and using low-precision processing technology with an accuracy of only one millimeter, we successfully manufactured high-precision parts with an accuracy of 1.000 millimeters.

So this is why Mr. Qian is the well-deserved first contribution to the national defense of the Republic.

Although Mr. Qian is responsible for building missiles, Mr. Qian’s brilliant guiding ideology on the integrated utilization of the Republic’s industrial technology is an indispensable support for the entire national defense industry. Without Mr. Qian, not only missiles would not be built, but also atomic bombs would not be built.

Once it comes out, satellites can’t be built, submarines can’t be built, and anything that’s a little more sophisticated or requires a little bit of accuracy can’t be built.

It is no exaggeration to say that if Mr. Qian were gone, the entire republic would be gone, including missiles, satellites, bombs, submarines and aircraft. In that era of weak industry and low technology, all of these would be gone.

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In his previous life, at a third-rate university, Li Mengxi was so lucky to learn the most profound wisdom he had ever come into contact with in a boring class where everyone fell asleep.

Based on this wisdom, in an era when the industrial base was extremely weak, the Republic miraculously exploded atomic bombs in the Gobi, launched missiles and satellites into the sky, launched aircraft into the sky, and launched submarines into the sea. These endless feats are admirable.

Li Mengxi learned the industrial co-ordination method of building a fucking atomic bomb. Such a god-slaying technique, when used to forge iron, is not just a small use of a big talent, it is simply a small use of a big talent.

A question, is it possible to manufacture parts with a precision of 0.0001 mm in ancient times?

Such precision is too exaggerated.

But if you say it can't be done, the person who says it can't do it neither understands technology nor mathematics.

What does it mean to not be able to?

Although the machining accuracy in ancient times was low, simple machining accuracy of at least one millimeter, or even 0.1 millimeter, could still be guaranteed.

What should I do if I need 1.000 mm parts but the machining accuracy cannot be reached? Then I can directly make 10,000 or even 100,000 parts.

In this way, among these 100,000, one must be able to meet the accuracy standard.

This is how in ancient times it was possible to process ultra-high-precision parts with an accuracy of microns.

What is insufficient accuracy? What is low technology? What is inability?

Li Mengxi was so lucky. He accidentally learned a little bit of high-level knowledge, just a small knowledge point. In the entire advanced mathematics class, he learned only this knowledge point and nothing else.

However, just such a small point of knowledge was enough for Li Mengxi to see the vastness of the world.
To be continued...