Open an aircraft carrier to fight against Japan

A flying object with a speed of 1000 meters per second hits a steel plate, and the time it takes for the impact is on the order of microseconds. In such a short time, human eyes cannot see clearly, and the explosives in the shell exploded , so what people see is only a puff of smoke.

Everyone looked at each other, not knowing what happened. When the smoke cleared, a big hole suddenly appeared on the target board. It turned out that the shell penetrated the 1000mm homogeneous steel armor.

At this time, some of the crowd gave out a slight exclamation, but some frowned. Lin Yuan smiled and said: "Everyone has seen the power of our Ryukyu naval guns. At a distance of 1000 meters, it directly penetrated 1000 meters. millimeters of homogeneous steel armor."

Lin Yuan looked at the crowd and said proudly: "The various composite armors used by warships in the world today, converted into homogeneous steel armor, can reach 1000 mm? Therefore, the armor of Japanese warships is like a piece of armor in front of us. A thin piece of paper."

Before Lin Yuan finished speaking, an old man in his 60s or [-]s stood out from the crowd. After saying something, the translator said: "This gentleman is a reporter from a German newspaper, his name is Inex, and he hopes to come to Take a look at the target board.”

Lin Yuan looked at that Inex, and thought to himself: "You are still pretending to be like me, you are still a reporter! You are clearly an artillery expert. When you looked at that artillery just now, you looked carefully! With that look, I wish I could see The artillery saw through."

Lin Yuan smiled and said: "Of course, anyone else wants to go to the target board to see it."

Afterwards, the translators from the four countries translated Lin Yuan's questions one by one, and another seven or eight people in the crowd raised their hands. Lin Yuan thought to himself: "It seems that this group of people is not easy to fool!"

In the eyes of those who don't know how to do it, the armor penetration depth of 1000 mm is simply amazing, but they ignore an important question, that is: what kind of armor are they wearing?

An important parameter to measure the performance of armor steel is the surface hardness. Steel with high surface hardness is not easy to be broken down. Different steels have very different surface hardness, especially steel without heat treatment, the surface hardness is even lower. , and the use of different heat treatment processes has different effects on the surface hardness of steel.

Seeing that the cannonball penetrated the 1000mm steel armor, Inex's first thought was: Is this young man who explained to us lying to us?What kind of steel is used for the 1000mm steel armor he mentioned?With this idea, he proposed to go to the scene to see.

Lin Yuan looked at them and sneered secretly, thinking: "We have prepared for this move, and we are afraid that you will not go to see it on the spot." So Lin Yuan put on a gentle smile and said: "Okay, my friends' request I have no reason not to agree, I will send a signal to let the carriage come to pick you up."

Lin Yuan kept waving the red flag in the direction of the target board, and waved the red flag twice on the other side. After seeing it, Lin Yuan's expression changed, and he said: "Some minor problems have occurred in the shooting range, and we can't go there now. Please friends Wait a moment."

Inex frowned and asked, "What happened?"

Lin Yuan said: "The explosives in the warhead did not explode, and our people are dealing with them."

Inex's eyes widened and he asked, "What did you say? Such a high-speed shell hit the target, yet some explosives didn't explode!"

Lin Yuan put on an innocent expression, and said: "It may be that the drug chamber ruptured during the high-speed impact, causing the booster to fail to detonate the explosives behind." Lin Yuan's words are also well-founded. In the design of armor-piercing projectiles, one or two annular grooves are usually formed between the head and the drug chamber, so that when the head hits the target, the stress that causes the head to break will be concentrated in the annular groove, and the rupture will not occur. It will extend to the medicine room, which can maintain the explosive power to the maximum extent.

Naturally, Inex had never heard of this structural design concept derived from modern armor-piercing projectiles, so he began to lower his head to think about this possibility. After about half an hour, Lin Yuan said: "Okay, we can go there. , but the carriage belongs to a fellow villager, and the fellow villagers have gone back to eat, so we had no choice but to walk."

Lin Yuan led the crowd to the target board. Ten minutes was enough for a distance of 200 meters, but Lin Yuan led the crowd for half an hour. Lin Yuan said while walking: " Everyone, walk slowly, the road here is not smooth."

When they arrived at the scene, there were many fallen iron pieces scattered on the ground, and Inix jumped on it, looking for something among the iron pieces. After a long time, Inex took some thin iron pieces Take a picture and walk up to Lin Yuan.

Inex asked: "I want to borrow some of your things, is it possible?"

Lin Yuan asked: "What do you want to borrow? If we have it, we will definitely lend it to you."

"I need some sandpaper, a polisher, nitric acid, some wine, the best microscope, and a well-ventilated room for me," Inex said.

Lin Yuan was secretly delighted, thinking: "You've been hooked!"

It turns out that the purpose of Inics asking for these is to conduct microscopic metallographic analysis on these steels. Metallography is the internal shape of metals. Different heat treatment processes can produce different metallographic phases. For experienced experts, just look at With a glance at the metallographic diagram, it is clear at a glance what heat treatment process is used for this metal, whether it is normalized, quenched or annealed. Inex wants to use this to judge the strength of the steel used for the target plate.

But Lin Yuan pretended to be embarrassed, and said, "We do have these things, but they were bought with money..."

Inex said: "Needless to say, we will pay for the amount!"

Lin Yuan said, "Ten thousand pounds."

Inex signed a HSBC check and handed it to Lin Yuan. Lin Yuan took it and put it away, smiling, "We will prepare it for you."

Soon Lin Yuan led Inics to an empty room, which contained a lot of equipment for chemical experiments. Immediately, Inics started to work. He first polished a piece of steel with sandpaper, and then Put it on the polishing machine, because there is no electricity, so the polishing machine can only use manual power, he found someone to shake the handle, so that the polishing disc rotates evenly, Inex carefully put the steel piece on it and polished it .

After washing with wine several times, Inex opened the window, took a graduated cylinder, mixed wine and nitric acid in a certain proportion, poured the mixture into a heating crucible, and ignited the alcohol. The lamp, the pungent smell of nitric acid wafted from the crucible, but fortunately the wind from outside the window blows away the smell.

Inex carefully put the steel sheet into nitric acid, took it out after a while, cleaned it, and put it under the microscope. Modern metallographic microanalysis uses a special metallographic microscope to magnify The magnification is very high, there is also a computer connection, and there is a special software for analysis, but the earliest metallographic analysis was indeed done under a low-magnification microscope.

Lin Yuan looked at Inex's concentrated expression and thought to himself: "This guy can be regarded as a top expert. Metallographic analysis technology in this era has just started, and he already knows how to judge the heat treatment process of steel from metallographic analysis. gone."

Inex had already seen the vague metallographic structure at this time, and shook his head in surprise.