"By now, we already know that the length-to-diameter ratio is a very important indicator for armor-piercing bullets, but it is not easy to make such a long and thin piercing rod." Qin Zhenhua began to talk eloquently.

This most basic technical essentials are clear to everyone, but if it is clear, it does not mean that it can be made, and the most typical example is the Soviet Union.

Speaking of the Soviet Union's armor-piercing bullets, even in later generations, they were criticized, and the kind of steel core bullets that were exported were counted, even if they used them themselves, they were all two bombs, and the bullet core was divided into two sections, and then a steel sleeve was used in the middle.

It looks quite bulky, and the aspect ratio is not high, don't the Soviets know that the more slender it is, the better?

Of course they knew, but they couldn't make a breakthrough in alloy smelting technology, and they didn't have the right materials at hand, so they couldn't do it.

This requires the support of metallurgical technology.

In terms of the material of the armor-piercing bullet core, for a long time, engineers have locked tungsten alloy, tungsten alloy is a fairly hard substance that can be found in the world, and the specific gravity is also large, but it has a disadvantage, that is, it is relatively brittle! It is easy to break, so even if it is an armor-piercing bullet using tungsten alloy, on the outside of the core, a steel sleeve is wrapped, as was the case with the shells of the main tank guns of the early West, such as the M735 and DM13.

Now, Qin Zhenhua boasted, that is not blushing at all: "We use the world's most advanced liquid phase sintering technology to build, the process of this technology, quite complicated, first of all, tungsten powder and iron powder, nickel powder and other metal powders are mixed in proportion, pressed into the required long rod shape and then heated to high temperature, we all know that tungsten has the highest melting point, so iron and nickel and other metals melt first; These liquid molten metals will fill the gaps of tungsten particles, just like we pour water into a cup full of beans, the water will fill all the gaps, and at this time, tungsten reaches a semi-molten state and forms a solid matrix structure with liquid iron, nickel, etc., to get the most qualified hard alloy we want, and then, in order to increase strength, after cooling, we will also apply the traditional process, the formed tungsten alloy rod is repeatedly forged and rolled, and finally made into tungsten-based alloy bullet core. ”

In the past, as long as tungsten carbide was used, it was tungsten-based armor-piercing projectile created by this liquid-phase sintering technology.

Of course, this technology is not actually secret, what is kept secret is the specific process, in which the temperature of a certain manufacturing is the key, this technology, in the sixties, when the United States and Germany jointly engaged in the MBT-70 tank, they engaged in this armor-piercing projectile, but the initial process was not advanced.

Now, if you want to say that this process has matured, it is Israel, Israel has developed this process and made the M111 armor-piercing bullet that they are most proud of, which is the first tungsten alloy armor-piercing bullet in the Western world that is not protected by a steel jacket.

The power of this kind of armor-piercing bullet, the Israelis themselves are quite confident, and now, Qin Zhenhua said that the process of processing advanced tungsten alloy armor-piercing bullets in the eastern countries is actually this technology, which is even more impressive, there is only one way to succeed, this one, they have flowed out, and the eastern powers have actually flowed out, how did they do it?

Of course, the big countries in the East have the advantages of the big countries in the East, they have the largest tungsten mine in the world, and they have never lacked tungsten, although this thing is more expensive, but they are easy to get, and it is easy to study its smelting technology, so it is naturally expected to get this advanced armor-piercing bullet now.

"You also use liquid-phase sintering technology?" An engineer on the opposite side said: "What is the length-to-diameter ratio of this armor-piercing projectile of yours?" ”

For armor-piercing projectiles, the length-to-diameter ratio is a very important indicator, and the larger this index, the stronger the armor-piercing ability of armor-piercing projectiles.

"Well, we've been able to do 18 at the moment." Qin Zhenhua said.

When he said this, he was a little embarrassed, obviously, he was considering whether to tell the actual situation, the real data may be even greater than this.

This is also the practice of various countries, many of the technologies on their own tanks are kept secret, including how thick their armor is, how strong their armor-piercing ability is, and they must be kept strictly secret, so that when they get to the battlefield, they can be effective in one fell swoop.

However, just the number of 18 that can be announced to the public is already relatively strong, after all, at this time, most of the armor-piercing bullets, the length-to-diameter ratio has just broken through 10, and the advanced one has just been able to reach 15.

The other party's progress in this area is really effective.

"So, if we can, can we exchange technologies with each other?" Mr. Taal asked.

The technical level of the big guys is about the same, and they can learn from each other's strengths, of course, this is only limited to when both sides are at the same level, if not, then the West is high and will never teach the relevant technology to the eastern powers.

Qin Zhenhua's face showed a meaningful smile: "This, of course we welcome it, but after all, this is our core technology, and it takes a lot of processes, so, for the time being, I suggest that we exchange some finished products, how about it?" ”

He is right, when it comes to the top secret of the armored troops, even if it is Huang Lao, who leads the team, he can't call the shots, he must ask his superiors, he must go through a lot of processes, and in the end, it may be delayed for a long time.

Now, let's exchange some finished products first, and the big guys will take them back and study them separately.

Mr. Tal nodded.

"We would like to invite you to stay a little longer and visit us, and by the way, we would like to hold a seminar where everyone will sit down and study together the development and future prospects of tank technology, I wonder what you think?"

Seminars on tank technology, such conferences, have also been discussed in China, internationally, of course, and now, experts from both sides are sitting together to study the tank technology of the future and enhance friendship with each other.

In the past, only the developed countries in Europe had this qualification, and the big countries in the East did not have this qualification, after all, they only had five pairs of load-bearing wheels and did not have any advanced technology, but now, the delegation of the big eastern countries that visited this time also had capable people, and the plan proposed to improve the tank as an infantry fighting vehicle was very high-level, so Mr. Tal had a whim and wanted to convene such a meeting.

Qin Zhenhua glanced at Huang Lao, and Huang Lao nodded seriously.

What's this, isn't it just bragging, if you want to fool, Qin Zhenhua is quite good.