Does a sword that sharpens iron like clay really exist?

In fact, in my opinion, it doesn't exist, whether you can cut this thing is relative, all kinds of substances have the corrosiveness of various substances, this is related to physics and chemistry. The material has a lot to do with the material of the iron you are cutting.

It is possible to cut iron like clay, but I have never seen it. I don't know what the name of the blacksmith's master planing knife is, but I saw it when I was a child, and when it came out, the corner part of the knife was in the easy planing, and he sharpened it. Iron, if you don't add other elements, it's still very soft, don't talk about steel bars, that hardness is much greater, because carbon is steel.

I think there are too many things that modern so-called technology can't solve ancient technology, but some so-called experts in modern times can't solve ancient technology, so they will say that it's superstition, and there are many things like this, otherwise how can they highlight their role!

Sharpening iron is like mud is exaggerated, but a knife to cut a finger thick line of steel bar, such a knife still exists, I have also seen, without the blade to scrape the iron rod, the iron rod off the iron filings The blade changes.

If you are fooled, it is not to cut It's not chopping As long as the sharpness value of the knife is high, you take an iron rod and cut it along the same as the apple peel The forging props in the past are hard enough The sharpness value is enough You can fool the layman Jianghu technique There have been kitchen knives that have been used before.

Of course, Xiang Laosai, the sword king in Yunnan, can cut steel bars with a knife.

I dare not say that the iron is sharpened like mud, but it is very sharp. Warriors exercise regularly and are physically strong. With a sharp blade in hand, there is a certain death in the sweep.

Nitpicking is trivial, and it is impossible to sharpen iron like mud. Machine tool cutters such as milling cutters and frustration cutters can

I think it should exist, and the hardness of pure iron is not high.

It's very difficult in ancient times, but it's still very simple to get it in modern times, just find some high-quality high-speed just beaten into a knife (the knife must conform to structural mechanics) The blade is nano-processed, and it is not very expensive, 56 hundred yuan.

I used to have such a dagger, sharpening steel bars is to sharpen the play, our house's security doors were pierced at once, and it didn't take much force to cut off the branches with a radius of 3cm.

Look at what force, if the stamping die punches and shears mild steel, you can achieve "sharpening iron like mud." ”

I've got a sure hand!

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The metal materials of knives that can be sharpened like iron and clay are as follows:

1.Pure carbon steel: As the name suggests, it does not contain any other alloy components and is the simplest type of steel.

If properly treated, it behaves extremely aggressively: high strength, high hardness, excellent cutting performance, good impact resistance, and is easy to sand. This steel is great for fighting knives or survival knives.

2.Stainless steel: Stainless steel is an alloy that does not rust easily and is commonly used as kitchenware, medical equipment, and knives due to its high corrosion resistance.

3.Damascus steel: It is composed of a variety of alloys with different carbon contents, which are repeatedly folded and forged to form a layered structure of alternating high-carbon steel and low-carbon steel. This construction gives Damascus steel an extremely hard and sharp force that can easily cut through iron and leather.

4.High-speed steel: It is a tool steel with more alloying elements, which has high hardness, high wear resistance and high heat resistance.

The manufacturing process of high-speed steel tools is simple and easy to grind into sharp cutting tools, so despite the continuous emergence of various new tool materials, high-speed steel tools still account for a large proportion of metal cutting.

5.Tungsten carbide: an alloy material made from a hard compound of refractory metal and bonded metal through powder metallurgy process.

It has a series of excellent properties such as high hardness, wear resistance, good strength and toughness, heat resistance, corrosion resistance, etc., especially its high hardness and wear resistance, which basically remains unchanged even at a temperature of 500, and still has a high hardness at 1000.

6.Diamond: It is the substance with the highest hardness and the best thermal conductivity among the known mineral materials.

The cutting edge of the diamond tool is very sharp, the roughness of the edge is very small, the friction coefficient is low, it is not easy to produce built-up edge during cutting, and the machining surface quality is high. However, the tools are mostly made of synthetic single crystal diamond.

7.Cubic boron nitride: It is a new synthetic material made by sintering CBN dice powder with a small amount of binder phase (or TIC, TIN, A1203) under high temperature and high pressure with a catalyst.

It has high hardness, good wear resistance, excellent chemical stability, and no chemical reaction with iron group metals at 1200-1300, which can be used to process steel.

It should be noted that different tool materials are suitable for different purposes, for example, pure carbon steel is suitable for fighting knives or survival knives, while high-speed steel is suitable for making complex thin-edged and impact-resistant metal cutting tools. Therefore, when choosing a tool material, it is necessary to quietly choose according to the actual needs.

Knives that sharpen iron like clay are usually made of stainless steel or pure carbon steel. Common scalpels are generally made of pure carbon steel, which can be used in a complex environment, and can have strong corrosion resistance, because it does not rust, so it is very hygienic, but the cutting performance is poor, and things with high cutting hardness are easy to break. Pure carbon steel is usually used to make fighting knives and self-defense daggers, with high strength, high hardness, easy to polish and other advantages, even in the face of very hard items, pure carbon steel is not easy to break, but the disadvantage is that it is easy to corrode, so it will become not so sharp and need to be re-polished.

The knife that is usually used to sharpen iron like clay may refer to a large knife, that is, a knife used in fighting. This kind of knife, which is not available at the moment, may appear in the future. In ancient times, the so-called knife that sharpened iron like clay should be described as sharp and exaggerated.

If a knife is to be sharp, it must be sharpened very thinly, which has high requirements for the strength, hardness, rigidity and toughness of the material. Normally, the toughness of high-hardness materials is not good, and the hardness of high-toughness materials is not enough.

1.Pure carbon steel: As the name suggests, it does not contain any other alloy components and is the simplest type of steel.

Pure carbon steel, if properly treated, can behave extremely aggressively:

High strength, high hardness, excellent cutting performance, good impact resistance, and easy sanding.

This steel is great for fighting knives or survival knives.

The only disadvantage of pure carbon steel is that it is prone to rust. But because of this, many people ignore its use value and turn to stainless steel.

2.Stainless steel.

Stainless steel, most commonly 440C, which is used as a scalpel.

This is because its rust-resistant properties give the impression that it is easier to disinfect or more "hygienic", not because of how good the steel is.

Stainless steel, in any effective hardness range, does not have excellent cutting properties and, at higher hardnesses, is very brittle.

In addition, stainless steel is difficult to sand.

So, if you expect your knife to have good knife performance, stainless steel is definitely the worst choice.

3.Damascus steel.

Damascus steel, in the simplest terms, is a rolling combination of steel and iron.

It is also known as "corrugated steel" in military legends, a kind of steel that combines the inherent potential of all the best knives of the day, and is one of the most eye-catching.

A good Damascus knife can have a sharp edge not found in any other steel today, as well as superior impact toughness and incredible long-term sharp hold.

In addition, it is very easy to sharpen.

List of Chinese knives:

1. Single knife. Refers to a short-handled machete; A type of Chinese martial arts sport in which only a single knife is used for performance and practice.

2. Tang knife. The knife type originated from the Han Dynasty ring head knife, most of the military Tang knives in the early period retained the ring head, and the same source also had a straight blade.

3. Chinese Miao knife. The traditional knife skills that are famous at home and abroad are the precious cultural heritage of the Han nation. Kill the enemy in battle, and the power is great.

4. Imitation joint stick knife. A riot-proof stick knife designed for the police, the combination of the knife and hail is a very deterrent aggressive**.

5. Liu Bei's saber: During the Three Kingdoms period, Pu Yuan made a treasure knife for Liu Bei, engraved with "seventy-two refinements", which can cut and carry a bamboo tube filled with iron beads.

<> knives that sharpen iron like clay are usually made of stainless steel or pure carbon steel. Common scalpels are generally made of pure carbon steel, which can be used in complex environments, can have strong corrosion resistance, and are very hygienic because they do not rust, but the cutting performance is poor, and things with high cutting hardness are easy to break. Pure carbon steel is usually used to make fighting knives and self-defense daggers, with high strength, high hardness, easy to be tampered with and sharpened, etc., even in the face of hardness to make the bridge strong items, pure carbon steel is not easy to break, but the disadvantage is that it is easy to corrode, so it will become not so sharp, and it needs to be re-polished.

This is because the degree of iron in ancient times was not high enough, so this situation will occur, and the purity of iron is very high now, and it is unrealistic to want to cut iron into mud.

Because in ancient times, when forging knives, they would be forged by hand, so the forged knives were very sharp, and now knives are made by machines, so they are not particularly sharp.

Because the current ones are designed with some safety factors, mainly in order not to hurt people, they can't be sharpened too quickly.

<> "Ancient knives can sharpen iron like clay, why can't knives now?"

In ancient times, people forged a good knife and often used sharpening iron to test whether it was a good knife. The best knives come standard with "sharpening iron like clay". As early as the Paleolithic period, there was already a shadow of a knife.

At that time, the sharpening knife used a relatively thin stone chip, which was sharpened to one side, just for the convenience of life, and it was definitely not possible to sharpen iron like clay.

It was not until the Shang Dynasty in 2000 BC that bronze products appeared. At this time, human beings continued to fight for territory, and the knife gradually became the best hand to fight on the battlefield. Ou Yezi was a master caster at the time, and he greatly improved the hardness of the blade and the sharpness of the blade in response to the war situation.

Although the bronze knife has made a qualitative leap compared with the stone knife, it still cannot be sharpened like clay.

To do this, first of all, the hardness of the knife itself should be higher than that of iron, and secondly, the blade of the knife should be thin enough to cut the iron like mud while the knife itself will not crack and be damaged. Later, with the advent of ironware, forging knives were not limited by technology and materials, and were raised to an unprecedented level.

During the Spring and Autumn Period and the Warring States Period, with the development of iron-smelting technology, the ancients of the Han Dynasty invented the ring-headed knife. The blade of this knife is particularly hard and the blade is also very sharp, and it is easy to use, which has a great advantage on the battlefield. When the Han army's ring-headed sword collided with the weapons of the Xiongnu, the opponent's weapons were often cut off.

At this time, it is really not too much to describe it as sharpening iron like clay. But there is a reason for this: the Xiongnu were nomadic people, and basically no one knew the technology of smelting and forging iron, and most of the weapons were made of backward iron leaves.

They think that iron leaves are very hard iron products, but in fact it is not the case, iron leaves contain a lot of impurities, which makes the hardness of iron very low, and it is easy to break, and this disadvantage is very obvious when fighting against each other on the battlefield. Under such an unequal situation, it is reasonable that the Han Dynasty easily cut off the weapons of the Huns.

Later, people said that the gods were like gods, in fact, most of them were deliberately said by people with intentions, one is to boost morale, and the other is to enhance the influence of their own army, which is conducive to the expansion of the territory of the whole country.

Nowadays, it is rare to cut iron directly with a knife, and now the hardness of steel and many other metals is much higher than the hardness of iron, as long as it is forged into a thin enough blade, it is easy to cut iron like mud. However, many machines can now be used to cut a variety of metals such as iron, and it is very convenient to cut through ultra-high pressure or physical high temperatures.

Therefore, the meaning of the existence of the knife now is very different from that of the knife in ancient times, and there is no need for Wang Lun to sharpen iron like clay.