Liu Huaishen scratched his head, opened his eyes wide, and looked confused: "Commander, why do you need to use ice water? Isn't there an old saying that strikes while the iron is hot? You should add more fire, right?"
Liu Yu secretly laughed in his heart. Fortunately, he came from a later generation and knew the physical knowledge that thermal expansion and contraction, and the alternation of hot and cold would damage the internal tension of metal. Otherwise, he would probably be like his younger brother Huaishen, who thought that continuing to heat would destroy the metal.
Where is the door.
Liu Yu suddenly became curious. Did the resourceful Liu Muzhi also understand these physical principles? He looked at Liu Muzhi and said, "Fat man, do you think it should be heated or cooled with ice water?"
"
Liu Muzhi gently shook his feather fan and said calmly: "Of course you have to use cold water. Although Huaishen said that striking the iron while it is hot is common sense, but please note that while striking the iron, it must be quenched. Why?
How about immersing the red-hot iron in cold water or even the urine and grease of cattle and sheep?”
Liu Zhong said thoughtfully: "Yes, this hot soldering iron can also be put into cold water, and then it will harden all of a sudden. However, if the water temperature is not controlled correctly, or if it is immersed when it is overheated, it will sometimes break into two pieces.
We have seen this kind of thing too many times in the military. Sometimes swords that are not well tempered may look sharp, but are very brittle inside and will break after just a few cuts. We are also puzzled by this.
"
Liu Muzhi smiled slightly: "Although this gold and iron thing is hard, if there is a hot enough place, the gold and iron can be softened and even melted into iron juice. Our method of forging fine steel armor leaves is
Using the method of blowing air from a blast furnace, fine iron can be directly melted into molten iron, and then poured into earthen molds to form armor pieces. Jinu, this is when you first joined the Beifu Army and worked in the logistics camp.
A blockbuster invention, I still remember it."
Liu Yu nodded: "I think back as if it was yesterday. Therefore, this high-heat place can soften iron, but if it is inserted into ice and snow in an instant, from extreme heat to extreme cold, the originally soft steel will become softer.
, quickly changed into a fixed shape again. Although it looks hard, the inside becomes fragile due to the alternation of yin and yang. If it encounters a strong external force, it will easily break from the inside. It is the kind of sharp edge that A Zhong mentioned.
It’s sharp but not strong anymore.”
Liu Huaishen suddenly realized: "It turns out that this is also the law of yin and yang, cold and heat. It seems that everything in this world is inseparable from the mutual rotation of these two things. The harmony of yin and yang. If the violent yin turns to yang, or the violent yang turns to yin, let alone
If people can't bear it, even gold and iron can't be used."
Liu Yu secretly sighed in his heart. Although his distant brother did not understand the physics principles of later generations, he used the theory of yin and yang and liangyi to explain it. It seemed that the wisdom of this ancient man was still powerful, although it was not as good as
Modern physics can also use various clear data and concepts to define everything, but it also vaguely understands the principles of mutual generation and restraint of yin and yang, two yang and so on.
If it can provide practical services all the time, wouldn't it be difficult to develop a scientific system with Chinese characteristics on this basis? If I could popularize the ideal compulsory education all over the world, let everyone read and write, and then explore the principles of these sciences,
With China’s human and material resources, how could China not also lead the world in science and technology?
However, Liu Yu's thoughts quickly turned back to reality. He put away the smile at the corner of his mouth and said, "That's it. Unless the heat continues to be high and becomes extremely sunny, the iron door will melt into black metal."
of iron juice, otherwise it would still be difficult to destroy. When we strike iron, we have to use a closed blast furnace and blow hard, and the hot air must be returned to the furnace to continue to blow air, so that the Yang Qi and hot air can get higher and higher.
Turning iron into liquid, but here, it is impossible to create such conditions. It is impossible to completely melt the iron door into iron juice. Therefore, we must find a way to quickly cool down the hot and red iron door.
, just like hardening it with a handful of ice spring water, the result will be..."
Liu Zhong laughed: "The result will be that this big iron gate, just like the sword that failed to be tempered, will break and collapse on its own due to the attack of yin and yang, internal damage!"
Liu Yu's eyes flashed coldly: "Go and transport twenty buckets of ice cubes to the front. They were originally used to chill the royal wine after the army's victory. Now they are used to attack the city and capture Guanggu. There are plenty of them in the cellar of Murong Chao's palace.
With these ice cubes and fine wine, I will keep you drunk with everyone!"
Liu Huaishen smiled and said: "Commander, I will do this myself. Iron Niu's head may not be able to understand the knowledge of yin and yang reconciliation, but as long as it is your order, let him hit his head against the red-hot
He will execute the iron gate without saying a word, so just wait for the good news."
Liu Yu nodded: "Huaishen, be careful, ask Brother Tieniu to be careful too, don't be too forceful."
As Liu Huaishen trotted down the podium, Liu Muzhi looked at the battle ahead, with an unspeakable smile on his fat face. He shook his head: "I won't say whether the iron gate can be broken, but I
Now almost all the troops rushing to attack the city have been burned by the enemy. The city wall has become a sea of fire, and it will burn for a long time. Next, our army will not be able to attack the city directly, and the ladders and siege towers will not be able to get close to the city wall. We can only rely on the bottom of the city.
Shooting with arrows and attacking with arrows and stones cannot break the city unless..."
Wang Miaoyin quickly picked up the topic: "Unless these black fires can be extinguished immediately, right?"
Liu Muzhi curled up his lips: "This black demonic water is a rare and rare thing. Its mutual support and mutual restraint are different from ordinary oil, saltpeter, and sulfur. If you pour it with water, the fire will become even bigger. I don't know how to put it out.
Miaoyin, what can you do?"
Liu Yu laughed: "Fat man, fat man, don't you claim to know astronomy from above, geography from below, and manpower from below? Aren't you bragging that you have thousands of years of knowledge in your belly? Don't you say you know half of the things in the sky?
You know everything about the world. How can there be something unexpected?"
Liu Muzhi smiled bitterly and said: "Because no ancient books have recorded this black demonic water. I have never seen this thing, and I can't study it. Maybe this thing comes from heaven, or from hell, those
I have no way of knowing."
Liu Yu shook his head: "If you don't know, then ask Miao, Her Royal Highness the Queen, how could she know?"
Liu Muzhi curled up his lips and looked at Wang Miaoyin who was smiling: "Because she has a good sister Murong Lan, there may be information exchange."
This chapter has been completed!