Qin Chuan was a little disappointed, and the six-pounder gun failed.

It didn't explode, but as soon as the double gunpowder was fired, a thin crack appeared in the barrel of the gun, and it was directly declared scrapped.

Qin Chuan was dumbfounded when he looked at it.

There were no problems in the process.

The refining of molten iron has also been greatly improved, and Yan Sanqi has tested this crucible refining method many times, and the quality of pig iron refined each time is much higher than before.

Although the silicon content is too low to produce gray iron, the impurities in it have been greatly reduced, and the quality is naturally not bad.

But why did the barrel crack?

Is it because the temperature of the central water cooling method is not well controlled, the cooling rate is too different, or the cooling rate is too bad, resulting in dark marks?

Or is it annealing, too hot? Not enough annealing time? Or are the returns uneven?

Or is it that after carburizing and annealing, the metal properties of the hemp iron cannot be effectively improved?

Qin Chuan couldn't figure it out.

Chen Zhan can see it, for him, how can the cannon be made.

Even if it is a mature and reliable method, there will be scrap products, not to mention new methods and new artillery, it is normal for the first gun to fail.

Qin Chuan pondered for a long time, and finally decided to try another method.

This method does not need to heat the inner mold, only need to heat the outer mold to two or three hundred degrees, do not pursue gray iron, let the gun chamber cool quickly when casting, and then put it back into the closed furnace for a long time to anneal, to obtain black-hearted malleable cast iron.

The toughness and strength of this cast iron are very high, and it is no problem to make a gun barrel.

Of course, the previous iron mold preheating method also has to continue to test, use two methods to make a few guns first, see which method makes the better quality of the artillery, and then use which method.

Immediately, Qin Chuan called Chen Zhan and Yan Sanqi over and pointed fingers.

Before he could explain clearly, a figure suddenly appeared on the snow in the distance, staggering towards this direction.

The two red-clothed attendants drew their long knives, held wooden shields, and took the initiative to meet the man.

It didn't take long for the red-clothed squire to bring the man over.

After seeing Na Rao's appearance clearly, Qin Chuan frowned.

He has seen this person, not long ago Lao Huang brought back from Lan County, the hungry people who seem to be called Huang Erdan, were arranged to transport coal in the artillery factory, have a wife, and a one- or two-year-old baby, when he just got out of school, he inspected his house by himself, and gave him a piece of brown sugar.

Now that it is cold, Huang Erdan is sweating profusely, his face is pale, he is panting heavily, and his hands and feet are still trembling.

"What's going on?" Qin Chuan asked with a frown.

Huang Erdan opened his mouth wide and gasped for breath, but he didn't say a word, only pointed to the mountain beam in the east with a trembling hand, his face was anxious.

Qin Chuan's brows furrowed deeper and deeper, and he stared in the direction that Huang Erdan was pointing at, but he only saw a white expanse.

"Huang Erdan, don't be in a hurry yet, take a breath."

Chen Zhan on the side came over and pressed Huang Erdan's back, wanting him to calm down as soon as possible.

"Jiannu...... Jiannu ...... Jiannu is here......"

After Huang Erdan gasped a few more times, he finally made a sound.

Qin Chuan was taken aback: "What are you?" ”

"The chief steward, Jiannu is here...... Kill a sentry, there are two hundred of them, and they're coming this way, and they're going to kill you. ”

"Are you sure it's Jiannu?"

Seeing it with his own eyes, Jiannu took it out...... When I took off my hat and shook the snow, I saw a lot of bald heads, and those heads only had a thin braid. ”

Qin Chuan's face changed again.

"Chu Liu, go back to Mengjiazhuang for help, Chen Zhan, take the craftsmen and others to go first, and I and the guards will be behind."

"The Archsteward ......"

", hurry up."

As soon as Qin Chuan's words fell, a group of cavalry suddenly appeared on the mountain beam not far away, and they were spreading out their formation, divided into two, one part of them rode towards the road leading to Mengjiazhuang, and the other part came directly to the shooting range.

"Fuck you, when you go to Lao Tzu's territory, are you still so crazy, do you want to be a vegetarian?"

Qin Chuan took out his long knife and strode forward a few steps, looking coldly at the group of Jiannu who were rushing like wolves.

"Chen Zhan, take the others to go first."

"Squire in red, line up!"

"Yes."

One hundred red-clothed attendants took off their shields and javelins from their horses, then left their horses in place and ran on foot to line up three rows of shield formations behind Qin Chuan.

Horses don't run much faster than humans in thick snow, and they fall easily, and with pursuers behind them, falling means death.

Moreover, Chen Zhan, Yan Sanqi and the rest of the dozens of craftsmen, as well as more than 200 villagers, did not have horses, if Qin Chuan took the red-clothed attendants to ride a horse first, these villagers would be caught up by the Jiannu on horseback, and the final result would be death.

Qin Chuan couldn't go, he had to block Jiannu and buy time for Chen Zhan and the others.

There is no car array here, and there is not enough gunpowder, so you can only fight hard with Jiannu.

Hopefully, reinforcements from Mengjiazhuang will arrive soon.

There were about one hundred and fifty Jiannu coming towards Qinchuan, and when they were seventy or eighty paces away, they suddenly grabbed their horses, and then dismounted one after another and galloped towards them.

"Humph!"

Qin Chuan's face was a little solemn, but he still snorted coldly, and then took a wooden shield and five short flags from the hands of a red-clothed attendant.

Jiannu's tactics are very simple, depending on the situation, they start to fire arrows at a distance of eighty or fifty paces, while approaching quickly, they start to shoot flat with heavy arrows at twenty to thirty paces, and then launch a charge.

Their infantry archers can basically shoot strong bows, bows and arrows are extremely powerful, for the armor rate is not high, the quality of armor is not good, and there is no dense artillery, this method of warfare is very effective.

But this time, they faced the most elite red-clothed attendants under Qin Chuan's command.

Since there has been no war recently, Qin Chuan and a hundred attendants did not approve the iron armor, and only wore a cotton armor inside, but one person and one shield, which had enough protection ability.

When the first wave of arrows fell, several muffled screams of pain sounded in the red-clothed attendant array, and when the second wave of arrows fell, several more tragic swords sounded

At this time, Jiannu had already advanced to a distance of forty paces.

Qin Chuan saw the opportunity that the arrow had just passed, twisted his body violently, and threw out the bid in his hand.

His tactics are also very simple, withstand the opponent's long-range suppression, kill a large number of Shangren with javelins in a short distance, and suppress the opponent's offensive.

At this distance, in the sharp heavy arrows, no matter how strong the archer is, can not compare with the javelin.

After the first wave of 100 javelins passed, several unlucky Jiannu were pierced through the iron armor on their bodies by the javelins, pierced into their bodies, and fell to the ground with swords

More Jiannu blocked it with shields, but the head of the tender spear had a barb, which could not be easily pulled out after piercing the wooden shield, which seriously affected the use of the shield.

Those Jiannu had no choice but to continue to rush forward with their crooked shields.

Qin Chuan and the red-clothed attendants threw out the second round of guns, but this time there were only more than ninety, because several of the attendants had fallen to the ground from the arrows that had just bid for guns.

The arrowhead used by Jiannu is coated with horse dung, and it is good that it does not go deep into the meat, it can scrape off the surrounding meat, and it can also pick up a life, but if it enters the meat too deeply, or even into the internal organs, it is basically hopeless.

Qin Chuan didn't care much, and after throwing the five javelins inserted beside him in one go, he took out his long knife, shouted "kill", and then killed a burly Jiannu who rushed to the front with a wooden shield.

There were less than ninety of the one hundred red-clothed attendants left, and seeing that Qin Chuan was in the lead, these more than eighty people shouted the word "kill" in unison, and followed behind Qin Chuan, roaring and killing him.

After five rounds of javelins, there were less than 100 of the 150 Jiannu left, and if it was an ordinary Jiannu, the casualty rate of 30% would have been defeated long ago.

But this group was carefully selected, and instead of breaking up, they became more aggressive.

At the forefront was the Aobai who had just emerged in the Huang Taiji's western expedition to Chahar not long ago.

Ao Bai threw away the wooden shield with three javelins in his hand, stared closely at the leader who rushed towards him, and raised his waist knife.

When there were only four or five steps left between the two sides, Qin Chuan threw the shield in his hand towards Aobai, dragged the long knife, and chased after the shield.

As soon as he picked up the shield, Qin Chuan's long knife went from the bottom to the top and went to his neck.

Ao Bai did not retreat, but advanced, hit Qin Chuan's long knife with his chest, and slashed the waist knife in his hand towards Qin Chuan's neck.

Qin Chuan turned his head to avoid it, and then he heard the harsh sound of gold and iron delivery, as well as a sudden sharp pain in his shoulder.

Exercise!

Suffered.

The guy's iron armor was either thick and tight, or he wore two layers of iron armor.

Qin Chuan didn't have time to think about it, so he crossed over and raised his knife to slash at a fierce Jiannu behind him.

At this time, eighty red-clothed attendants and one hundred Jiannu collided together.

When the brave meets on a narrow road, the morale of both sides is about the same, but the red-clothed attendants lose as well as Jiannu in armor, and the number is also at a disadvantage, and only one hedge will lose the upper hand.

"Fuck me!"

Qin Chuan slashed off the head of a Jiannu with a knife, roared angrily with red eyes, and then rushed towards the next Jiannu.

"Fuck me!"

The remaining seventy red-clothed attendants roared with rage.