Not changed

There was no chief general in the shogunate, only Sima of each division. The Qin army retreated, and most of the Sima did not want to withdraw, but they were worried that the soldiers were completely damaged without reason as Zhuang Wudi said. E Cao's last powerful slash broke the worries of Sima. However, Zhuang Wudi, who was speechless, still refused to agree to beat the drum, saying that he would wait for Xiong Jing to return, and the matter was so frozen here.

Xiong Jing was not aware of the dispute between the Chu army's shogunate and the forward. After galloping around the Qin army's shogunate, he saw Gui Jing rescued by the light cavalry. He fell off the horse when he got arrowed. The inconvenience of his calf broke his leg bones.

"Qin people, Qin people Jing crossbow..." Gui Jing was about to cry without tears. He fell on the snow and watched more than 300 heavy cavalry rushing towards the short-soldier array, and then watched them as they were destroyed like Jing Sheng's more than 600 cavalry. "Gianjia, Gianjia..."

The Jing crossbow was one of the reasons for the destruction of the Qin army's heavy cavalry, and another reason was the military armor. Xiong Jing asked in confusion: "How about the Jujia?"

"The Qin army's chief spear entered the giant armor straight into the giant armor, and all our knights were stabbed to death, and the giant armor was not solid!" Gui Jing choked, recalling the scene when the heavy cavalry rushed into the short army array just now. He saw several knights being pierced by the Qin people's chief spears and strung together.

"Jujia?!" Xiong Jing couldn't believe it. He never knew that Jujia would be pierced by the chief spear. It was a brand new armor.

"Reported to Da Ao, all the aurora are inferior... cough cough cough..." When Shangguan Bao's head was about to be cut off by the Qin people, Xiong Jing led the cavalry to rush forward. He was a knight who rushed into the short-soldier array and rushed out. "My minister, sword, sword..." Looking at Xiong Jing, he disappeared before he finished speaking.

"Sword?" Xiong Jing dismounted the horse. He seemed to have heard the most terrifying thing. The movement of dismounting was very clumsy. A large part of the combat power of the Chu army was based on the giant armored sword. Because of the advantage of the Qin army's cavalry, artillery cannons can only be fixed on the turret and cannot be moved easily. If there are problems with the giant armored sword, what should the Chu army do?!

Xiong Jing dismounted the horse, and the light cavalry handed the sword that Shangguan Bao tightly held to Xiong Jing. This was a sword, and the tip of the sword was cut off for some reason. Seeing Xiong Jing looking at the broken mouth, Gui Jing said, "What I see is that the long sword is cut off. Only the front thorn, but the front thorn is also broken."

"Broken?" Xiong Jing took the sword and slashed at his arm. When the others were shocked, "bang", the giant iron sword made by the Giant Iron Mansion was instantly broken into several sections. He was shocked in an instant, and grabbed a knight wearing giant armor like crazy, and slashed his shoulder with his sword. Another "bang" sound, the sword was fine, and the thickest giant armor piece on his shoulder was cut off.

"Da Ao, the armor is indeed easy to get damaged." A knight stood up and pointed at a hole in his waist. "Fortunately, don't wove the armor of my wife, otherwise..."

"Mo Xiangjia?" Mo Xiangjia is a chain mail. After the new type of riding armor came out, the knight changed the armor again. Mo Xiangjia can not wear it, which can save more than ten kilograms of weight, but not all knights don't wear Mo Xiangjia. Some people wear it, while others don't.

Xiong Jing was probably crazy. Before he finished speaking, he aimed at the knight with a sword. The thin wooden board of giant armor was stabbed like a huge armor. Mo Xiangjia, on the inside of his clothes, toughly blocked the tip of the sword, and the knight who was in the sword was retreating repeatedly.

"Changjin Lake, Changjin Lake..." He lost his soul and read a lake that no one knew. Everyone was silent. However, everyone did not dare to disturb him, knowing that he must have thought of an extremely important thing, which may be the reason why the giant armor broke and the giant sword broke.

Xiong Jing did think of the reason why the Jujia broke and the Jujian broke. He finally got involved in the military. Is the Changjin Lake Ninth Corps without cotton coats not good? Is the logistics support not good or the Corps itself careless? This is a menstrual topic. In the battle of Changjin Lake, the war zone suddenly became cold to minus 30 degrees and forty degrees. The soldiers' bolts were frozen and unable to pull them open, the grenades did not explode, and the mortars were fired, and the cannon chamber was broken without even being fired. The machine guns were fired every few minutes, otherwise they would also freeze, and the shooting speed of the cannon was much lower than the normal value...

Cold is the only factor that causes weapon failure, and it is also the only factor that causes the rupture of the Giant Armor and the breaking of the Giant Sword. Xiong Jing can only think of this, but cannot think of more professional reasons. In fact, most metals have brittle transition temperatures, that is, above a certain temperature, metal is tough. For example, modern steel plates can absorb 325 joules of strike energy in longitudinal temperature impact tests. However, when this steel plate is at a low temperature of minus 30 degrees Celsius, toughness will suddenly become brittle after a small section of temperature. The steel plate that could absorb 325 joules of kinetic energy can only absorb 25 joules of kinetic energy in temperature impact tests.

The content of phosphorus affects the brittle transition temperature of steel (that is, after a small temperature, the toughness break becomes brittle fracture). The less phosphorus, the lower the brittle transition temperature, the lower the brittle transition temperature. However, even if the phosphorus content is as low as 0.001%, ordinary carbon steel without special heat treatment will still undergo brittle fracture at low temperatures of minus 2 or 30 degrees.

There are other factors, such as carbon (for every 0.01% increase in carbon in ordinary carbon steel, the brittle transition temperature increases by 2-4 degrees Fahrenheit), oxygen (0.01% oxygen can increase the brittle transition temperature of pure iron by 200 degrees) and the nickel. nickel added to Xiong Jing Jujia Jujian has refined the crystals, and the brittle transition temperature of the cannon steel with nickel added and chromium is as low as minus 5, 60 degrees or even lower.

Unlike copper smelting, iron smelting has much more variables than copper smelting. Ten years are not enough to accumulate enough data and experience. The Chu State, located in the south, rarely experiences low temperatures of minus 20 degrees Celsius. Anyone who has experienced such a low temperature, do not adjust any elements, just adjust the heat treatment process and refine the grains inside the iron through normalizing, a low temperature of much lower brittle transformation temperature can be obtained. Unfortunately, these are too late.

"Big Ao! Big Ao!" Lu Yangyan finally shouted, awakening Xiong Jing who was thinking. Seeing Xiong Jing looking at him, he pointed at the Jujia Army formation he had just broken. The Qin army formation in the front retreated, and the first half of the formation was full of Jujia Army formations. The two military formations finally merged together. The central army chasing behind suddenly attacked the retreating Qin soldiers, and the fierce fighting began again.

‘Dongdongdongdongdongdongdong…’ The Qin army’s shogunate had been ringing before, but now it suddenly turned into drumming. Xiongjing was surprised. The giant armor broke and the giant sword broke in the cold, but why did the Qin army still attack? Could it be that they...

Xiong Jing was stunned when he looked at the two converging Qin army. He suddenly thought of the heavy cavalry of the whole army. If all the iron armors were frozen due to the severe cold, why should the Qin army kill the enemy? He looked at the short-soldier array outside the shogunate. The sunset finally shone on the cold and solemn shogunate, and the copper spear in the hands of the shogunate soldiers reflected a golden light.

It's bronze! Xiong Jing sighed in his heart.

"Give me a copper spear, give me a copper spear, give me a copper spear..." The two military formations finally merged, and the Qin soldiers of Jujia abandoned the huge spear and iron spear in their hands, and robbed the copper spear in the hands of the retreating Qin soldiers.

There were 470,000 infantrymen, 160,000 huge spears, 80,000 iron spears, and all the rest were copper spears. Originally, these soldiers holding copper spears were arranged behind the formation, but now they retreated and happened to send copper spears to the 140,000 old Qin soldiers. The Qin soldiers who snatched the copper spears either advanced over the defeated soldiers and stabbed the soldiers of the Zhao and Qi soldiers who came from behind the defeated soldiers.

Copper and tin bronze are both excellent low-temperature metals. When the strong iron transforms from toughness to brittleness, the bronze still maintains its toughness at room temperature. Zhao Zu chased Qin Zuo and stabbed hard. They were indeed a little surprised why they did not stab the Qin Zuo every time they stabbed hard, but who would care whether their weapons were broken?

When the last few rows of defeated soldiers fell to the ground, the copper spears on the hands of the old Qin soldiers stabbed without warning. They had long been used to protecting the giant armor, but instead used the Yi spears in their hands to stab each other. The result of the anti-puncture was much better than their expectations. The Yi spears stabbed the Qin soldiers on the giant armor, and the Qi spears cracked, but the spear tip had broken at some point and could not penetrate into their bodies. The Qin soldiers' copper spears also stabbed them, and the Qi armor was also broken. The difference was that the cold copper spears stabbed into their abdominal cavity smoothly, and the cold penetrated into their bone marrow.

"Hey!" Qin's soldiers yelled in a low voice and took the lead to stab the copper spear again. Zhao's soldiers, who didn't know what happened in the rear, were hit by the spear again. The armor of the giant armor broke and the copper spear directly pierced into Zhao's head. They moved forward and stabbed again. The Zhao soldiers who chased them had no idea what was going on. They were stabbed to death by Qin's soldiers every time they rushed forward.

Seeing that the chasing Zhao Zhu was easily defeated by the bronze spear in the hands of the Qin Zhu Jujia, Bai Lin felt as if he was dreaming at this moment, but the shouts on the battlefield were indeed real. Standing in the chariot, he pointed at the formation of the coalition forces in the west and shouted: "Attack--!"

"Attack--!" Tens of thousands of Qin soldiers in the central army shouted after him, holding up their copper spears and running back towards the coalition army that had just been chasing their comrades. The unknown three armies of Zhao, Wei and Qi also shouted to meet the enemy. The hesitant Chu Shifu finally stopped the sound of the slogan, pointed in front of the feather flag, and the sound of drums rose again.

"Da Ao..." Seeing the retreating Qin army rushed towards the coalition forces, Lu Yangyan's instinctive feeling was not good. Thinking of the things that Gui Jing and Shangguan Bao just said, and thinking of Xiong Jing's explanation just now, he said helplessly: "Our army is defeated."

"No!" Xiong Jing shook his head. "Our army has not been defeated!"

"The Qin people had bronze spears, and our soldiers and soldiers were not sold out, so our army was defeated!" Quan Feng also shouted. "Please return to the seal quickly!"

"Our army has not been defeated!!" Xiong Jing shouted at him. Then he actually said to several light cavalry: "Tell me quickly that the divisions and brigades have a copper spear between the corpses of the Qin people after the war, and the copper spear can withstand the severe cold. The cannon must be heated before attacking."

"Yes!" The knight shouted. The central army is fighting with the Qin army now, and the Chu army is all on the side. The victory or defeat cannot be said to be too early.

"Go on the horse!" The light cavalry ran, and Xiong Jing ordered the knight to get on the horse. "The nickel giant is in front, don't hang the armor in front, and the giant armor is behind..."

"King Jing!" Wang Jian's smile was unconcealed. When he saw the Qin army rushing towards the Chu army, he smiled. The Qin army won, and the Chu army, whose spears were frozen, were definitely not the opponent of the Qin army. He believed that Xiong Jing also understood this, and he was on the horse to escape. However, Xiong Jing did not leave, and he ran towards him again.
Chapter completed!