Eastern Jin Invincible Iron Army

Chapter 114
Just when Chen Ying wanted to stop the reckless Xu Jingxuan, Xu Jingxuan made a sudden move. He raised the rattlesnake engineering shovel, struck at the top of Xi Chao's head, and shouted: "Look at the trick!"

"Good time!" With Xi Chao in his hand, he held a big sword in his hand, the momentum I have in the world.The hundred-refined Qingfeng sword had a cold and gloomy light, and it rolled towards the strange weapon in Xu Jingxuan's hand.Swords and shovels intersect.There was only a clanging sound, and half of the sword tip fell to the ground.

How could the hundred-refined fine steel sword break so easily?Looking at the broken sword that fell to the ground, Xi Chao's heart felt like a knife was twisting.This sword was obtained by chance by his grandfather Xi Jian Xi Taiwei.Now that this ancestral sword is destroyed in his own hands, how can Xi Chao be willing?
"How is this possible?" Huan Wen got up and picked up the broken sword blade on the ground, looking puzzled.

In steel products, the lower the carbon content, the softer, and the higher the carbon content, the more brittle and hard.Medium and low-carbon steel is soft, but not sharp when used to make swords. The ancients also regarded it as "wrought iron". Only high-carbon steel whose toughness, hardness, and strength meet the needs of making weapons was considered "steel" by the ancients.The level of carbon content determines the softness and hardness of steel.So it is expressed by being hit by a forging hammer.An experienced ironworker will be able to tell that it is a piece of soft iron.It is still a good steel that can make swords and swords.

The so-called one-hundred-time steelmaking refers to the fact that every time the furnace is heated once, it is called one-smelting, and it is called one-smelting after one hundred times of going back to the furnace.Of course, in the era when hydraulic forging hammers were not used, the master used iron tongs to clamp the steel sheets, and the apprentices beat them with iron hammers. The hammers were hammered slowly by manpower, and the steel blank would be cold after only a few knocks. It had to be returned to the furnace to be heated and folded once. It is often necessary to return to the furnace four to six times, so the hundred steelmaking will be folded eighteen to 25 times.

The steelmaking technology is nothing more than that, and it was considered the roost before 2000, but compared with modern technology, the gap is not 01:30 points.The softness and hardness of steel are closely related to carbon content, high carbon content makes it hard, and low carbon content makes it soft.The ideal situation for a sword weapon is to be hard on the outside and soft on the inside. If the outside is hard, the blade will be sharp, and if the inside is soft, the blade will have good elasticity and will not easily break.

However, in the process of repeated forging in steelmaking, the outer layer of steel is in contact with air, the carbon is oxidized, and the steel becomes soft due to the reduction of carbon; the inner layer is not in contact with oxygen, and the carbon is not reduced much.In this way, a structure of soft on the outside and hard on the inside is formed, the blade is soft but not sharp enough, and the blade is brittle and hard but not strong enough.It is true that forging helps to remove the dross inside the steel and reduce the size of the remaining dross, so that its composition tends to be uniform, the structure tends to be denser, the grains are refined, and the performance of the steel is improved; but the distribution of carbon content is not Coordination is its inevitable flaw.

Clever Chinese craftsmen partially solved this problem with local quenching.After the steel is quenched, from the metallographic point of view, the austenite with a Vickers hardness of about [-] is transformed into a martensite with a Vickers hardness of about [-] to [-]. Simply put, it is hardened.The so-called Qingfeng sword in Xi Chao's hand is actually a defective product with congenital defects.Repeated folding and forging in the steelmaking process will form an oxide film between the layers, and the repeated folding will cause metal fatigue, so it becomes very brittle while being sharp, and cannot withstand strong collisions.

The rattlesnake engineering shovel is made of high manganese steel (manganese 10% to 15% and carbon content generally 0.90% to 1.50%) mixed and formed by the blast furnace of later generations. Therefore, the high manganese steel with as-cast structure is very brittle and cannot For use, solution treatment is required. , That is to heat the steel to 1050 ~ 1100 ℃, heat preservation to eliminate the as-cast structure, obtain a single-phase austenite structure, and then water quench to keep this structure at room temperature.After heat treatment, the strength, plasticity and toughness of steel are greatly improved, so this heat treatment method is also often called water toughening treatment. (Old Cheng is a graduate of metallurgy, so I added a few more words, you can read it if you like it, and skip it if you don’t like it).

With the superiority in forging technology, even a rotten high-manganese steel engineering shovel can easily trample a hundred-refined sword, the highest pinnacle of a swordmaker.Xi Chao and Huan Wen stared blankly at the fragments in front of them, momentarily bewildered.

Chen Ying looked at the stupefied two people, and couldn't help but smiled wryly, "Your Majesty, Xi Canjun, does this rattlesnake deserve the title of peerless soldier?"

At this time, Huan Wen, Xi Chao, Xi Zuochi, and Li Jingshu began to face up to this ugly rattlesnake engineer shovel.The front blade was glowing with azure blue light, Huan Wen was a man of knowledge, he flicked his finger on the ridge of the shovel lightly, and there was a dragon chant, even Mo Xie, the ancient general, was nothing more than that.

Xu Jingxuan stepped forward and explained: "This is a rattle snake. It can stab (pry), split, and chop. It has the functions of shovel, pick, saw, and knife." Chen Ying took out an iron bar about the thickness of a finger , and let Huan Wen try the sharpness of the rattlesnake.

When Huan Wen tried it, he cut off the iron bar as thick as a finger, leaving not even a dent on the shovel blade.He suddenly became short of breath, his face was flushed, and he shouted, "It's really a peerless magic weapon!"

Xu Jingxuan stepped forward and explained: "So it's a peerless magic weapon, it's definitely not bragging, Da Sima please take a look!"

As Xu Jingxuan said, he rotated the back cover to reveal the powerful flashlight, and then turned on the switch of the flashlight, and the powerful flashlight emitted a dazzling glare.

"This……"

"Amazing……"

"Unbelievable!"

"Ingenious!"

Hearing the tsk-tsk-tsk-tsk admiration from the crowd, Chen Ying and Xu Jingxuan beamed with joy.

Chen Ying sent the gift list in a timely manner. Xi Chao saw that there were gold, silver, pearls, jade, etc. on the gift list, which were worth tens of thousands of gold (equivalent to five baht in the Eastern Jin Dynasty). What surprised Xi Chao was that there were still five thousand Rock salt.

Although tens of thousands of dollars is a lot, it is actually not much for Huanwen, the largest feudal town that controls the tax revenue of the three prefectures of Yi, Jing, and Jiang.But five thousand shi refined salt is completely different.There is only one way to obtain refined salt in this era.That is to boil salt with sea water.However, because China has freshwater rivers with large flow such as the Yellow River, Yangtze River, and Huai River that flow into the sea, the salt content of seawater in coastal areas is actually not high.Usually forty or fifty catties of seawater are boiled dry, only about one catty.So sea salt is more valuable than brine salt.Even nobles, princes and aristocrats can't afford refined sea salt, so they use this fine, powdery, white and flawless refined salt to rinse their mouths.

"The two of you have come to Xiangyang from a long distance. It is really disrespectful to give such a large gift to my chief Sima." Huan Wen said with a smile: "Being courteous to others, one must ask for something. I wonder what you two want? "

Chen Yingdao: "My family's governor has more than [-] people, [-] elite soldiers, and his heart is for the court..."

There is a saying that cannibals are soft-mouthed and short-handed.Huan Wen was overjoyed when he got the peerless magic weapon. Before Chen Ying could finish the speech he had prepared, Huan Wen interrupted: "So, you are a righteous citizen who cares about the court?"

"Reporting to Da Sima, it is true!" Xu Jingxuan said: "My family's governor, surnamed Gao Danyou, Cao Zi Jingzong. He was born in the Gao family in Bohai. Now it is the year of Zhixue and has not yet married, so I propose to Da Sima. Ruo Da Sima Enzhun, the [-] soldiers and civilians under my Jianghuai Governor's Mansion are all ordered by the great Sima Ruarm!"

"Zhu Zi is so daring!" As soon as Xu Jingxuan finished speaking, Xi Chao and Xi Zouchi yelled almost in unison.

　This book is scheduled to be released on Friday, 3.31, so please help me out.

　　
　
(End of this chapter)