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Chapter 1209: Steel Shell Bullet

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    Since bullets began to appear, brass has been used as a material almost all the time. Specifically, it is made of brass containing about 60% copper, that is, a copper-zinc alloy. After all, copper has many benefits  , For example, it is not easy to rust and has a long storage time, good self-lubrication and thermal conductivity, high ductility, low probability of fracture and jamming, high precision, etc.

    Among them, the soft texture and good ductility are the most important. After all, the bullet is in a state of high temperature and high pressure when it is fired. If the bullet has good ductility, it can be slightly deformed, that is, expanded.  In this way, the back is sealed better.

    At the same time, after the bullet is shot out, the cartridge case can still be drawn out. Since copper is also a very good self-lubricating material, the resistance when extracting the case is small, and the chances of the case breaking and jamming are very low.

    Now, no one can think that steel can be used to make bullets. Steel is so hard. If you make bullets, you will be hell if you don't get stuck in the barrel.

    Even if it was Lu Da, he didn't react for a while, and asked: "Use steel to make bullet casings? Why?"

    "Because it saves money and is easy to mass-produce." Qin Baoshan said: "After all, we don't lack steel, we lack brass."

    There is no shortage of steel, and that¡¯s not true. At least until the oxygen top-blown converter is built, the production of steel will not increase further. Right now, they still lack steel.

    However, brass is indeed lacking. After all, China has been a country lacking brass since ancient times. It is precisely because of this that China has produced steel-cased bullets.

    In later generations, the West used copper-cased bullets, while the East used a lot of copper-clad steel or painted steel, which is low in cost and convenient for mass production.

    At the beginning of China, brass was also used in the manufacture of bullets, and later it was changed to copper-clad steel and deep-drawn high-quality carbon steel.

    Now, seeing that the era of assault rifles has entered ahead of time, the demand for bullets has greatly increased, and it is time to consider the issue of this bullet.

    Of course, Qin Baoshan knows that many people are extremely critical of steel-cased bullets. Some even say that this kind of thing is simply a disaster for front-line soldiers.  You have to think of another way.

    Especially now, during the war, a lot of bullets are used, and there is not enough copper, so we have to find a way.  Hearing Qin Baoshan's words about saving money, Lu Da's face turned serious: "Yes, using steel is of course saving money, but there is only one reason to save money. Soldiers must be able to use it."

    "That's right, the steel is too hard, even if it can be made into bullet casings, it won't be usable." Liu Daquan followed suit.

    Qin Baoshan nodded: "Yes, if you use steel directly, it won't work. So we can cover the steel with another layer of copper, and that's enough."

    The advantage of copper is that it has good ductility and lubricating effect at the same time.  So it is more convenient to extract the casing, but copper is more expensive and the output is low, so Qin Baoshan simply proposed a new method: use steel to make the bullet casing, but cover the outside of the bullet casing with a layer of copper.  This covers a layer, and the amount of copper required is greatly reduced.  If you want to mass-produce, you can save a huge amount of brass.

    Hearing Qin Baoshan's words, Lu Da's eyes lit up immediately: "Yes, this method is feasible."

    ? Use shifting brass on the outside of the steel.  With this layer of brass protection, it can solve the various requirements of not getting stuck and conveniently extracting the shell.  At the same time, the amount of brass used is reduced, and the technical difficulty is not high.  He just thought about it briefly, and he knew that there was a possibility of success.

    Qin Baoshan knew that his suggestion had already been approved.

    This kind of copper-clad steel shell will become a bullet technology for a long time in the future.

    Of course, copper-clad steel also has disadvantages. For mass production, it uses plates to process bullet casings, which has a low utilization rate and is difficult to recycle.  After all, when it is manufactured, copper is covered on it. When it is recycled, copper and iron cannot be separated, which increases the difficulty of recycling.

    Therefore, it is best to use paint bombs.  This kind of bullet is directly processed by carbon steel bar. The process is a bit complicated, but the cost is low. First, the raw material of the bar is cut into small cylindrical blanks, and then the two ends are flattened.  After melting and saponification, it is sent to the stamping mold, and with a click, it is extruded to form a bullet case.

    After the shell casing is processed and formed, it can be phosphated and then electrophoretic painted.  On the surface, it looks like a bullet with a copper case, but in fact, it is already a steel bullet.Made, this paint can increase the anti-corrosion ability of bullets, and at the same time, different colors can also distinguish the types of bullets.

    In the future, paint bombs will definitely be used. After all, it is the cheapest, but the technology is not up to the mark now, so, step by step, it is better to start with copper clad bombs.

    Lu Da's eyeballs rolled quickly, and he was already thinking about the various crafts involved.

    Liu Daquan, who was on the side, was also thinking about this matter, and suddenly asked: "If this is the case, does it mean that this kind of bullet cannot be reloaded after it is recovered?"

    Liu Daquan was really smart, Qin Baoshan nodded: "That's right, this kind of bullet is disposable after use, and it is impossible to reuse it. But it doesn't necessarily mean it will be wasted. These bullet casings are collected, although they can't be refilled with bullets.  Yes. But we can do other things, such as burn them, or make grenades."

    Qin Baoshan solved the problem with one sentence. The raw materials needed for the grenade are the simplest. If you can¡¯t make bullets, the grenade is still fine.

    Liu Daquan nodded, expressing his satisfaction with Qin Baoshan's arrangement.  If you can't make bullets after recycling, then make grenades.  In short, as long as you don't waste it.  But soon he thought of another problem.

    Even if it is wrapped with copper on the outside, I am afraid that the airtightness is still not very good.  So this kind of bullet can only be used on bolt-action rifles, and can't be used on burst weapons?

    You know, at present, even the reloading bullets are not used on automatic weapons as much as possible. The bolt-action rifle needs the lowest bullet requirements. If it is fired in succession, it is likely to run poorly.  If you want to oil the bucket, you will know how difficult it is.

    If this is the case, it would be a bit tasteless. After all, what the Eighth Route Army currently lacks most is bullets for continuous fire weapons. The mass production of assault rifles has greatly increased the demand for bullets. The smelted brass is mainly used to manufacture these bullets.  , Those ordinary bolt-action rifles almost all use reloaded bullets.  (Remember the site URL: www.hlnovel.com
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