Compared with iron nails, the advantages of medical surgical instruments are simply needless to say, and the only disadvantage is that it is a little more troublesome to start. However, it is not too difficult, whether it is a medical school or a pharmacy school, as long as the experiment is conducted, there will be scrapped surgical instruments. Chen Yi only needs materials, and it is not difficult to find a way to buy some waste products at a low price.

After finishing his cranky thoughts on the way back to school, Chen Yi arrived at the dormitory. While taking away the fatigue and filth from his body with a hot bath, he also had a general plan for the following work.

Just do it, Chen Yi put on his clothes and ran to find the experiment preparation teacher.

At this time, the school had just started, and the experimental preparation teacher was packing up the things that the graduate students were doing experiments during the holidays, and they happened to be found by Chen Yi. Although it may be a bit abrupt to go to the experimental preparation teacher to collect scrap iron, Chen Yi feels that he is also buying anyway, and I will buy other scrap products at whatever price he sells, and he is quite confident.

The experimental preparation teacher was startled at first, thinking that she had encountered the kind of digging into the corners of socialism, and hoped that she would sell the old surgical instruments that could still be used as scrapped. After listening to it for a long time, I realized that this young man who looked a little shrewd wanted some steel for surgical instruments as experimental raw materials. Since it is scrapped iron, it doesn't matter what to do with it.

The female teacher in her thirties looked at the clean young man, generally speaking, all kinds of pleasing to the eye, not to mention that Chen Yi was not bad, and he had just cleaned himself up. After a brief consideration, the teacher accepted 100 yuan and gave Chen Yi four scrapped tissue scissors, two hemostats, and nine wire scissors.

Several surgical instruments have been tested for a long time, but fortunately, the materials are enough to get acquainted, but there is a problem with the part of the middle connection, and the thread buckle of the screw has obvious traces of being repeatedly repaired.

It's a pity that there is a limit to repair, and tapping itself is a little more troublesome for the hard stainless steel of surgical instruments, not to mention repeated tapping? There is a way to kill thieves with intent and have no power to return to the sky, and in the end, several scissors are beyond repair, and finally the screws are completely broken. If you want to repair it again, it is not a simple tapping to make a new thread can be solved, then you need to take it to temper and rebuild, it is not as simple as scrapping.

But Chen Yi didn't care about this, he sincerely thanked the experimental preparation teacher, and happily ran to the dormitory with a schoolbag containing scrapped equipment. While running, I thought: scrap products are cheap, if you go to buy new things, Taobao A minimum of ophthalmic scissors is 30 yuan, and the big scissors don't know how much to charge, and you can buy two or three for a hundred yuan, a difference of almost five times, which is cost-effective.

But then again, although the instrument material used to perform animal surgery is indeed very good, in the final analysis, it is stainless steel, and the quality is better at best. Chen Yi has always been obsessed with two metals in his heart, the first is the magical memory alloy, and the other is the titanium alloy.

It's a pity that there's no way to get it.

Chen Yi doesn't know where the memory alloy is, but the titanium alloy does know, the titanium alloy has the characteristics of light and hard, which is widely known, but not many people pay attention to the affinity of titanium alloy for the human body.

If titanium alloy is made as a substitute for bone, the human body will be 100% friendly to it, as if it is a natural bone, and there is no need to do anything after healing, and it is often used in orthopedics or brain surgery.

It stands to reason that it shouldn't be very difficult to get this kind of thing, but this thing, if the raw materials are still good, but if it is made into a medical product, then how can it be an expensive word, when Chen Yi was chatting, he asked the senior who was practicing in brain surgery in the same house, a titanium alloy net, that is, more than ten centimeters square, the purchase price is directly tens of thousands of yuan, and the average is nearly two hundred yuan per square centimeter.

Let Chen Yi complain, complaining that the doctor-patient relationship is so poor now, this patient will easily spend tens of thousands of hundreds of thousands, who has no fire in his heart, and he is depressed when he changes to the hospital, and the purchase is not cheap, I will not be able to do a loss-making business for you?

With better materials, Chen Yi tried to purify, while trying to find some more practical ratios for the toughness and hardness of metals in various states with different degrees of purification, he did not plan to choose materials that take into account toughness and hardness, but planned to use split design, so that materials with different characteristics can play the greatest advantage in different parts.

At present, what he is working on is a steel wire, which is modeled after the silk thread used by the secret service officer named Meng Zhijun, plus Chen Yi's own development, to make a new weapon.

The structure of the steel wire is not complicated, nine extremely thin wires are twisted into a slightly thicker one, and nine slightly thicker wires are twisted into one to form a wire less than 0.3 mm thick with a mechanical pencil lead. At each end of the wire, there is a small hard and sharp thorn, which is not too large, and looks like a large sewing needle.

The steel wire is very thin, but it is very long, more than 20 meters long.

Unfortunately, these are stainless steel products, even though the performance is very different from ordinary stainless steel, it is always a manganese-carbon alloy of iron.

If the ratio is right, titanium alloy, in terms of texture, is of course the best, but the price is too expensive, and he can't afford it.

There is no poison on the small thorn for the time being, but Chen Yi has considered this. However, for the current situation, the first thing Chen Yi thought of was metal potassium. Although potassium is not a special thing for the human body, it is a very deadly thing.

Potassium is a necessary trace element in the human body, under normal circumstances, the value in the blood is 3.5-5.5, the unit is millimole per liter, the small amount can hardly be purified, but it has a great impact on the excitability of muscles, if a short period of time into the body of a very high amount of potassium, then in general it is two manifestations.

Muscle weakness and the ventricles stop beating or flutter violently. This fatal effect, caused by the disruption of homeostasis in the body, is clinically known as hyperkalemia.

Simply put, it's potassium poisoning.

Chen Yi didn't have that much pure potassium on hand, but there was a compound of potassium in his dormitory, which was potassium permanganate. This daily disinfectant powder is easy to buy, and it also has good toxicity, and the most terrifying thing is that potassium permanganate and alcohol together can react violently - so violent that it can ignite itself.

And potassium permanganate and alcohol are things at his fingertips. Hiding potassium permanganate in a syringe, then piercing it into the human body, and then releasing it, with a little alcohol, is not a problem for Chen Yi.

His absolute power over metal control is not very strong: if he comes into contact with metal, he controls the metal to set a scale to the ceiling, and with all his strength, the weight of the scale is less than a hundred kilograms. This data is not high at all, that is, the power to hold Chen Yi up himself. However, if this not too much force was used to control a needle to pierce something, more than a hundred kilograms of pressure on an area the size of a needle tip was enough for him to penetrate most flesh and blood.

What's more, if he puts on a suitable posture and allows the characteristics of the metal itself to be brought into play, then he is confident that this power can be exerted several times, or even dozens of times.

After all, his strength, in addition to simply controlling the shape and shape of metal, also has a relatively weaker manifestation of metal that can only move freely for up to two kilograms within a meter without touching.

This form of expression, with Chen Yi's continuous understanding of power, can already be determined to be a kind of magnetic field, although the power is not strong, but it is still maneuverable enough.

After energizing a coil, a powerful magnetic field can be generated instantaneously, and if a metal needle is placed in this magnetic field, it can give the metal needle a strong initial velocity, and the electromagnetic gun is this principle.

Chen Yi secretly tried at home, and it was impossible to directly make such a coil into a super electromagnetic cannon by connecting it with a 220V alternating current. Because the characteristics of alternating current are that the positive and negative poles of the current are constantly changing, so the direction of the magnetic field is also changing, put a needle into it, it will tremble violently, and then fall to the ground due to external interference.

But as long as an inverter is installed to convert alternating current to direct current, the voltage of 220V and the huge current that comes with it can make a wire the thickness of a small sweater needle fly out fifty or sixty meters. If you attach your own magnetic ability to it, channel or cancel out the chaotic magnetic field, reduce all kinds of friction, and make this electromagnetic cannon more efficient, it is not difficult to nail an iron nail through a thick plank.

If it is combined with metal control to speed up the steel wire when attacking, the effect is even more exaggerated. In Chen Yi's first experiment, he used a one-meter-long copper coil and a sewing needle that flew out, leaving a large hole about 10 centimeters deep and two centimeters in diameter on the concrete wall of the dormitory. As for the sewing needle, it is impossible to find it at all.

Replaced by ordinary humans, there is no one who can not be pierced.

However, strictly speaking, this coil electromagnetic cannon is completely practicable at present. Control the arrangement of metals into orbital coils, channel magnetic forces, and accelerate metals...... If you have this time, it is better to conduct the current to the person and let the other person be electrocuted. However, what if this ability could one day be able to fire cannonballs using magnetic fields without the need for electricity?

And continue to reason, his main ability is the shape control of metal, and the control of the magnetic field does not know whether it is the second ability of the associated or the derivative ability brought by the metal cutting geomagnetic field, the strength of the magnetic field is not high, and the power of the electromagnetic cannon is very average; If you change those pure magnetic controllers, how powerful should their electromagnetic cannons be?

This made Chen Yi feel awe of the pure and powerful magnetic controller that may exist in this world, and at the same time he had a sense of eagerness: he had certain expectations for the circle that he had always longed for, but had never stepped into.

Sitting in front of his desk, Chen Yi wrapped the steel wires together, took another piece of copper that he brought from home, thought about it, and took out silver that was only the size of a little fingernail, which Chen Yi originally bought at home and used to make rings, and now he uses it to make a bracelet.

Hollow, a bracelet used to place steel wires.

It's not difficult at all, it just takes time.

However, Chen Yi has time.