Hearing this, Yu Hua knew that the heat was already in place, and without wasting time, he took out a prepared document from the briefcase he carried with him, placed it on the coffee table, and handed it to Rabe.
"Mr. Rabe, this is what I came for."
"Y-shaped armor steel presentation?" Rabe nodded, picked up the entire document with his right hand, and opened the first page. When he saw the name above, his pupils suddenly shrank, and he instantly grasped the key points.
Armor steel!
Although Rabe's profession is completely unrelated to military technology, he still understands the concept and significance of armor steel.
This is the basis for the ‘King of Land Warfare’ tank to achieve defensive capabilities!
An armored steel with excellent performance can give the tank very good defense, allowing it to win on the battlefield.
The shells fired by our own tanks can penetrate the enemy tanks, but the shells fired by the enemy tanks cannot penetrate our own. This is the role of armor steel.
The performance of armor steel depends on strength, purity, toughness, and plasticity. The higher the four values, the better its elastic resistance and penetration resistance.
Looking at countries all over the world, armored steel is one of the absolute cutting-edge technologies in the military field. For the armies of European countries equipped with a large number of tank troops and warships, armored steel is simply a lifeblood.
Rabe never expected that he would see a document about armor steel here. The key thing is that this document came from a Chinese student.
A Chinese student involved in high-end military technology?
It sounds so incredible.
"Huh..." He took a deep breath, suppressed the surprise and complicated thoughts in his heart, looked dignified, and was highly concentrated. He turned to the second page of the presentation and read it carefully.
Mechanical properties of Y-shaped armor steel——
Material hardness: 490HB,
Tensile strength: 860Mpa,
Yield strength: 580Mpa,
Impact toughness is not available yet, fracture toughness is not available yet.
The chemical properties are as follows -
The metal corrosion rate is approximately 0.01-0.1 mm per year,
Data on metal oxidation resistance are not available.
Metallographic structure: martensite.
Armor penetration resistance, this parameter is affected by variables such as endpoint ballistics. After comparing the published performance data of 1895 Krupp KC armor steel and 1890 Harvey armor steel, the theoretical penetration resistance parameters can be calculated as -
-100mm Y-shaped steel is equivalent to KC armor steel in the 130mm-145mm range, equivalent to Harvey armor steel in the 160mm-180mm range, and equivalent to 350mm wrought iron armor.
The degree of improvement is 130%-145% and 160%-180% respectively.
Since the latest armor steel models and formulas in various countries are currently unknown, the theoretical penetration resistance cannot be determined for the time being. However, according to estimates, the theoretical performance improvement of Y-type armor steel compared to the latest armor steel models in various countries is about 10%-13%.
, the impact of end-point ballistics variables is approximately 5%.
If the cold rolling process is adopted, its defensive performance will be further improved.
Evaluation: Y-type armor steel has excellent theoretical performance. It adopts a new formula, which can greatly improve the self-defense performance of tanks, cars, warships and aircraft. It is especially obvious in tanks and warship weapons. With surface carburizing hardening steel technology, the final practical
Compared with the latest armor steel + surface carburizing hardening technology in various countries, the defensive power should be improved by more than 40%.
It has to be said that as a 1937 paper PPT, Yu Hua's Y-type armor steel presentation is extremely beautifully written. It uses a combination of pictures and texts to explain the concept and various basic performance parameters of Y-type armor steel in turn, and gives
Outline the mathematical calculation process and material parameter calculation content.
It can be said that except for the core formula and core production process, everything that can be revealed has been revealed.
The living room fell into deathly silence.
As Rabe read the last line of the presentation on Y-shaped armor steel, his right hand trembled slightly, his mind went blank, completely occupied by the English letter Y, and his eyes were full of incredulity.
shock.
sluggish.
There was even a hint of fear.
All kinds of complex emotions surged into his heart, and rushed into his mind like a raging torrent. At this moment, Rabe was in an extremely shocked state. He really couldn't believe the words marked on this presentation.
Various performance parameters.
horrible!
It's really terrible!
The performance parameters of this Y-shaped armor steel can only be described as terrible.
As the head of Siemens China and the president of the Chinese Businessmen Association of German Enterprises, Rabe is involved in not only the civilian field, but also the military field.
When dealing in the military field, it is impossible to bypass Krupp, the king of German military industry. Rabe is very aware of the performance parameters of the KCn/A armor that Krupp based on the latest KC armor developed after 1928.
KCn/A armor, which is widely used in army tanks and navy warships, was basically crushed in all directions in front of this Y-shaped armor steel. The performance gap was exactly the same as the estimated data described in the article, which was roughly around 10%.
Compared with KCn/A armor, Y-shaped steel has an improvement of 10%, and compared with KC armor, it has an improvement of 30%-45%.
God, is this true?
Rabe couldn't believe it and couldn't believe it.
Because, if the performance parameters of Y-shaped steel are true and there is no data falsification, then it will be the most advanced and powerful armor steel model in the world, easily crushing all armors, and can be called the king in the field of armor steel.
The current king of armor steel is KCn/A armor!
The development history of armor steel mainly comes from the military field. It originally originated from warships. In 1855, the armor material originally used by ships was 'wrought iron'. The disadvantage was that the defense power was insufficient, the wrought iron was too soft and the strength was unqualified.
In 1876, France was the first to use Schneider's "steel armor". The disadvantage was that the metal was too brittle and had low toughness. Once a cannonball was hit, the armor surface would crack.
By 1877, the British used wrought iron to weld armor, mixing outer steel and inner iron, called composite armor. Wrought iron was used to improve the overall strength, and its performance was improved compared to Schneider armor steel.
In 1888, Britain and France developed nickel alloy steel. This was the first time in history that alloy steel was used as ship armor.
In 1891, American Harvey developed Harvey armor steel, using carburized surface-hardened nickel alloy steel. The defense capability of 6 inches of Harvey armor is equivalent to 10 inches of composite armor, that is, 152 mm is equivalent to 254 mm.
In early 1892, Krupp developed Krupp Water Steel, whose performance was 15% higher than that of Harvey armor, and the difficulty of research and development gradually increased.
In 1895, nickel-chromium alloy steel using surface carburizing hardening technology, the famous KC armor steel, was born. As soon as it was born, it crushed all armors at the time. The protection capability of 6-inch KC armor was equivalent to that of 7.5-inch Harvey steel armor, and its performance was improved.
25%,
It can be seen that the difficulty of research and development of armor steel is gradually increasing, and the performance improvement is getting smaller and smaller. Every improvement of about 10% can be called a big progress.
"Hua, is this Y-shaped armor steel real? Its performance parameters are too advanced... I have to question it. After all, China does not have the foundation for armor steel research and development. This is the most intense area of military technology competition.
"
Rabe, whose mind was flooded with thoughts, finally came to his senses. He took a puff of cigarette to keep his mind calm. Then he broke the silence and looked at the smiling Yu Hua: "Nearly all countries in the world that can develop advanced armor steel are industrial powers.
.”
question!
Direct and pointed attitude.
Although on paper the performance parameters of Y-shaped steel are superior to our own KCn/A armor in all aspects, a practical question is, how can you, a Chinese, develop such an advanced armor steel formula?
Rabe understands China very well. It does not have a complete industrial system and its basic industrial level is weak. The country's annual steel output does not exceed 50,000 tons, and it does not have the ability to produce high-end steel products.
What are high-end steel products?
Tank gun steel, artillery steel, bearing steel, machine tool tools, etc., including armor steel.
The protective power of an ordinary steel plate and an armored steel plate are completely different concepts.