Ying Zheng, the first emperor of Qin Dynasty (259-210 BC), was the first emperor in China to be called emperor. He established the basic pattern of China’s political system for more than 2000 years. Li Zhi, a thinker of Ming Dynasty, called him “one emperor for all ages”. From the perspective of Qin Shihuang’s mausoleum, we can have a chance to glimpse the cultural relics of Qin Dynasty. Although it is amazing, archaeologists found a batch of Qin swords in the terracotta warriors and horses at that time, just like modern science and technology The hardness of the sword made by us is equivalent to that of carbon steel. This “black technology” was more than 2000 years ahead of the world at that time.
There are many strange treasures in the mausoleum of Qin Shihuang. It’s amazing!
The bronze swords, 86 cm long and 8-edged in length, were unearthed from the second pit of the terracotta warriors and horses of the first emperor of the Qin Dynasty and the tomb of the first emperor of the Qin Dynasty. Using vernier calipers, archaeologists found eight conical surfaces with less than one hair. 19 bronze swords have been unearthed. This bronze sword has a dense structure and has been sleeping under the Loess for more than 2200 years. When it was excavated, it was still dazzling and very sharp.
A number of copper swords were found in Pit 2 of the terracotta warriors and horses of the first emperor of Qin Dynasty!
However, why are these bronze swords of the Qin Dynasty called “black technology”? According to legend, when cleaning up the 11th hole of the first pit of the terracotta warriors and horses of the first Qin Dynasty, a bronze sword was bent by a 150 kg pottery figurine. When people moved it away, an amazing miracle appeared: the narrow and thin bronze sword rebounded straightly in an instant, and naturally recovered, just like it had the function of memory. Using modern technology to analyze, could the craftsmen of the Qin Dynasty be able to remember A kind of “chromium” was added to his sword, because it can make the bronze sword return to its original shape after bending.
Qin Shihuang’s mausoleum is the eighth wonder in the world. It contains all kinds of cultural relics and funerary objects, including the pit of terracotta warriors and horses.
After the Qin bronze sword is bent, it can still be restored to its original state! This view has not been officially confirmed and is generally considered as folklore; however, the sword casting technology of Qin Dynasty was undoubtedly ahead of the world at that time; after scientific research, it was found that the surface of Qin sword contained chromium salt compound with a thickness of 10 microns. This discovery immediately caused a sensation all over the world, because this “chromate oxidation” process was an advanced process that appeared only in modern times. It was invented by Germany in 1937 and applied for a patent by the United States in 1950. As early as the spring and Autumn period and the Warring States period, the Chinese had mastered this advanced process.
At that time, the manufacturing technology of Qin bronze sword had been leading the world for more than 2000 years!
The key to casting swords is how much tin was added to the bronzes when they were melted in the bronze age. The sword is too soft when the quantity of tin is not enough, but it is easy to break when the quantity of tin is too much. However, the tin copper ratio of Qin Jian perfectly combines the hardness and toughness of bronze sword, making Qin Jian’s hardness ahead of the world. Its hardness is equivalent to that of medium carbon steel, and its toughness is equivalent to that of glass. It’s amazing! Moreover, Yuan Zhongyi, the leader of the archaeological team of the Qin mausoleum, once said that after analyzing the Qin sword, he knew that there was a thick layer of chrome oxide screen on the surface of the Qin sword, about 10 microns thick, which was one tenth of the thickness of a piece of paper. It was this layer of gray chrome protective layer that gave the Qin sword a strong and powerful anti rust ability.
The “black technology” of qinhuangling mausoleum is amazing! At that time, the casting technology of Qin Jian was ahead of the world, more than 2000 years ago. The wisdom of the ancients was really high. We don’t know what secret was buried underground. Maybe there will be more amazing “black technology” in the future!