"Carrying a three-foot Dragon Spring Sword, he will not swear to commit adultery and evil deeds." - "Water Margin"
In ancient times, due to the limited science and technology, the conventional weapons used were generally cold weapons. There are many types of swords in ancient times, and the styles are constantly changing after the continuous development of history, but there are not many preserved to this day, and the level of sword casting also represents the development of the iron smelting industry and copper smelting industry at that time. It is reasonable to say that the ancient industrial standard is not high, according to modern technology, it is easy to create ancient swords, but the discovery of the Mausoleum of Qin Shi Huang shocked experts.
In 1994, the Mausoleum of the First Emperor of Qin was approved for excavation, this huge ancient king mausoleum will be displayed in front of the world, in addition to the exquisite pottery figurines, the Qin sword has also attracted the attention of experts, in the excavation work, a total of 18 complete Qin swords were found, a qin sword bent by the pottery figurines, a total of nineteen. The main material of these Qin swords is copper. The sword is attached to the back of the human clay figurine and is a unified eight-edged sword. When the experts studied further, they were stunned by the discovery at the time.
By measuring the edges of these eight-sided swords, it is found that the error of each edge is less than 1 mm, and there is no unified system of swords, almost zero error, such a process error is quite terrible, which is more than 2,200 years ago in the Qin Dynasty. Moreover, the copper sword has not rusted, and the copper sword that has been stored for more than two thousand years has not yet rusted, mainly relying on a layer of chromide on the surface to play a role in preventing rust. This result makes people feel cold behind the back, to know that chromium was only discovered in 1797, even the Qin people at that time did not know that this metal was called chromium, and if they wanted to plate it to the surface of the copper sword, they had to refine the chromium first, and the melting point of chromium was 1970 ° C. Although the mainland's copper smelting technology started very early, but it is impossible to refine chromium, it is impossible to create a 2000 ° C environment, if there is really this technology, I am afraid it will not be the turn of the European industrial revolution, ancient China will enter the steel age nearly 2000 years earlier.
In addition to these eighteen well-preserved swords, the last sword pressed by the terracotta figurines is even more incredible. When the expert removed the clay figurines pressed on the copper sword, the bronze sword miraculously recovered. This is also explained by modern science and technology, that is, metal memory. Metal memory generally refers to alloys, and this technique was only available in the seventies of the last century.
What is even more frightening is that metal memory is related to temperature, and to master this technology, it is necessary to be familiar with the crystal structure of metal and understand the unique physical properties it exhibits with temperature before it can be applied to actual production. This technology was basically impossible to achieve in the Qin Dynasty two thousand years ago, because everyone had no concept of alloys, and there was no foundation for the microscopic chemistry of crystal structure. This leaves experts unable to explain.
It is difficult to believe that this is the industrial technology of the Qin Dynasty two thousand years ago, is the source of these two technologies not the Qin people, it is difficult to imagine the Qin people through what method to achieve chrome plating, so that the copper sword has a metal memory, at least at present there is no evidence that the Qin people mastered these two technologies.
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Article title: The 19th bronze sword of the Qin Emperor's Mausoleum, there was alloy technology 2000 years ago, experts can not explain the author of the article: Looking for the truth of history---- the statement of the central map: The pictures used in this article are from the network, the invasion and deletion of theft Warning: This account has signed a contract with the "Rights Defender Knight", which can monitor the theft of articles on the whole network in real time, please abide by the moral bottom line, do not do the party!