(The daughter-in-law's book "Daming New Landlord" is about to be on the shelves today, the pace of the book is very slow, not suitable for online text routines, interested brothers can take a look, but she has been uploaded from June 10th to now for four months, this kind of persistence, for her, is already commendable.) ）

Xie Kai didn't speak, looking at the people present, waiting for them to attack him.

As a result, after waiting for a while, the imaginary doubts did not appear.

The technicians, who are at least 1.5 times his age, do not question his age.

"Comrade Xiao Xie, please introduce your armor model. A middle-aged man in his forties with a Chinese character face and wearing a Zhongshan suit stood up, Xie Kai thought he was finally going to make trouble, but he said such a thing.

He himself blushed at his own stinginess.

Since everyone took the initiative to speak, he was naturally not polite, picked up chalk and drew a sketch model of the composite armor profile on the blackboard, each layer was clearly divided, and the name was written in words.

Then he pointed to the cross-sectional drawing on the blackboard, "Ladies and gentlemen, the Chobham armor that was researched by the British in the 70s is a secret technology for us. Only vague information can be seen in some magazines and newspapers. According to the characteristics of this armor, I personally believe that the theoretical model of this armor is composed of multiple layers such as high-hardness alloy steel plate + expansion reaction layer + carbon fiber layer + expanded ceramic layer + high-hardness alloy steel backplate + aluminum-containing metal lining, which is placed at an inclination angle, and each layer is filled with special rubber or other refractory cushioning materials......"

Each layer of the profile indicates what the layer consists of.

This kind of thing is a model constructed through some technical information on the Internet and some technologies involved in Xie Kai's usual military production.

Whether it has a huge protective capacity or not, it was not experimented.

In any case, such a theoretical model is definitely much more advanced than any kind of armor currently used in China.

"What alloy is used for high-hardness alloy steel plates?" asked the middle-aged man with a Chinese character face at the beginning.

This question may seem simple, but it is actually difficult to answer.

There are many types of high-hardness alloy steel, and it is necessary to have a detailed understanding of the top alloy materials at home and even international, and to know the material characteristics in order to answer.

Seeing everyone staring at him, Xie Kai finally understood that it was not that they did not question their age, it was not that they did not make difficulties.

The difficulties of technical personnel will not be unreasonable at all, but use technology to embarrass people.

If he doesn't answer well, his opinion won't be taken seriously in the future.

As long as the answer is satisfactory, it will never be questioned again in the future, and people who engage in technology are so simple.

He himself is a technician, and naturally knows their temper.

"Under the current circumstances, we can use tungsten-nickel alloy with a nickel content of about 18%, and add some medium and heavy rare earth elements to the material to improve the strength...... "As soon as Xie Kai opened his mouth, everyone's mouth opened wide.

Those who are engaged in armor research are naturally very familiar with all kinds of materials.

Xie Kai said that tungsten-nickel alloy has been developed in China, and there is no mature technology yet.

Not to mention Xie Kai, many people who are engaged in materials do not necessarily know tungsten-nickel alloy, especially the nickel content in it.

"Of course, if tungsten-nickel alloy is not enough, it will be better to be able to get the depleted uranium alloy researched by the United States. ”

"Comrade Xie Kai, it is difficult for the country to make a breakthrough in the short term of depleted uranium alloy, especially the depleted uranium alloy has weak nuclear radiation, which is a threat to the health of soldiers who have been with the chariot for a long time. Tungsten-nickel alloy has high strength, but it is not yet mature in China, and the production cost is very high...... "is still the middle-aged man."

"The high cost makes large-scale equipment unrealistic. Another said.

"We're experimenting at the moment, and the goal of the project is not to think about cost, but about how to improve performance. Xie Kai said, "the cost is large-scale equipment must be considered, now the production cost of tungsten-nickel alloy is high, because the process is not mature, coupled with the use of a wide range of fields, once the use of more, the cost will naturally come down." ”

The issue of cost is also a very important factor in the development of domestic weapons and equipment.

Now the situation of insufficient military spending by the military will continue for a long time.

"Tungsten-nickel alloy was originally used to make armor-piercing bullets, and armor-piercing bullets of the same material are armored, which is the problem of spears and shields. Someone else asked.

In the face of their constant troubles, Xie Kai not only did not feel unhappy, but breathed a sigh of relief.

It's not normal not to make a difficulty.

"It is indeed the relationship between the spear and the shield, whether the spear is stronger in attack or the shield in defense, it is only relative, there is no absolute. In composite armor, this is only the outermost layer of defense. Xie Kai looked at the crowd and drew a circle with chalk on this layer of the blackboard.

"The installation of high-hardness alloy on the outside mainly copes with high-explosive shells, and the use of multi-layer composite armor, whether it is high-explosive shells or armor-piercing shells, when the armor is hit, the outer layer of high-strength alloy will weaken the kinetic energy of the armor-piercing projectile to the greatest extent...... The other layers play a role in further weakening the kinetic energy of the armor-piercing projectile and the power of the sputtering stream...... "Xie Kai once again drew a picture of the deformation of the armor when it is attacked.

Under the surprised eyes of everyone, he continued to point to the picture and introduced, "The inflation theory, this is the proudest achievement of Chobham. Composite armor is also produced by this theory, and everyone knows that when the armor layer is tilted, it will produce a certain degree of deformation when it is attacked, and the horizontal force generated on the armor-piercing projectile will be decomposed into two forces, horizontal and vertical. ”

Seeing that everyone was listening carefully, Xie Kai paused and continued to introduce the organizational language.

"In this way, you can weaken your attack power and improve your own defense...... Therefore, in the development process, it is necessary to take into account that the high-strength alloy that makes our outermost layer not only have high hardness, but also have higher toughness. ”

Such a theory, for the current researchers of the armor of the republic, belongs to the most cutting-edge theory.

Internationally, such theories have been blockading China.

Xie Kai has flipped through a lot of technical literature and magazines, which have mentioned Chobham armor, and rarely have a detailed introduction to the expansion reaction theory that led to the birth of Chobham armor.

"Anyone who knows the material knows that pure tungsten has high hardness and brittleness, while nickel has good toughness, and the alloy made of the two needs to be higher hardness, so the nickel content is reduced...... If you need more toughness, you need to increase the nickel content. This needs to be experimented. ”

Xie Kai is also not very clear about the material structure formula, and there is a big gap in the material performance of different formulations.

Before engaging in technology, he was exposed to various types of materials, and even if he was asked to check it, it would be difficult to find it.

The physical and chemical analysis data in the unit are confidential, and many materials in the military production unit belong to special materials, which are not available on the market at all.

"I have seen an article about rare earth elements before, which has made some brief introductions to the properties of various elements, adding a certain amount of rare earth elements, can effectively improve the strength of the metal...... As the world's largest producer and exporter of rare earths, China has received little research on this aspect...... Therefore, what kind of rare earth elements are added can only be compared by experimental data...... "Xie Kai obviously knows that adding rare earth scandium and other elements can improve the performance of metals, but here, he can't say in more detail.

It is very unnatural to know that rare earths can improve the properties of metals.

Especially his current age.

Many people don't know what rare earths are all their lives.

"So, don't we need to study the material?" someone questioned.

They are only engaged in tank armor.

"It can also be understood in this way, if you don't even know the materials for tank armor, how can you do it?" Xie Kai said seriously. "In fact, we only need to conduct theoretical research, and even, we don't need to conduct theoretical research, as long as we think it is feasible, we will use stupid methods - continuous trial production. ”

"In this way, the cost of money is huge. Zhang Deming said with a frown.

"We have our own materials lab, which minimizes costs. Each material only needs to be produced in small quantities for research, and the cost is not high. Xie Kai replied, "The material is the foundation of the foundation." In the process of development, the obtained materials, even if they cannot be used in armor, can be used in other fields, and they are not wasted. ”

The material is the foundation.

Everyone knows that many areas of technical research are limited because they don't have access to the right materials.

The strength of theoretically designed parts can be achieved, but no material can be found to achieve this strength, which ultimately limits the development of technology.

"Bang, bang, bang......" The middle-aged man with a face of the Chinese character took the lead in applauding.

The others reacted and clapped their hands.

Although there were only more than a dozen people, the applause was unusually loud.

"Lao Cheng, his answer sheet is satisfactory to you, right?" Zhang Deming asked the middle-aged man with a Chinese character face next to him.

Guozi looked at Xie Kai, who was a little blushing, with a smile on his face, and nodded with satisfaction, "To be honest, I've been thinking about what he looks like on the way here." When I first saw him as a child, I even thought you guys were fooling around. However, his introduction subverted our cognition. ”

"How did you subvert it?" asked Zhang Deming with a grin.

"He knows more about the theoretical properties of various materials than we do. Even the judgment of some advanced cutting-edge materials is very accurate, and the improvement of the performance of rare earth elements for metals is just beginning to make some breakthroughs on our side......" Cheng Ping sighed, "Sure enough, it was the back waves of the Yangtze River that pushed the front waves, and we used to sit in the well and watch the sky." ”

"Environment. His father had access to these technologies, and combined with the nature of their unit, all kinds of state-of-the-art materials were within their reach. The base does not have so many children to play in the outside city, he goes to the workshop to play when he has nothing to do, or he reads all kinds of magazines borrowed by his father at home, who would have thought that he is interested in a child? Unfortunately, my daughter is too young. Zhang Deming sighed.

"I can't wait to make a model like this he said to be experimented with. Cheng Ping glanced at Zhang Deming with contempt, this guy is too shameless.