Ming Dynasty: White porridge and pickled mustard, and I am wearing a yellow robe!

The melting point of stainless steel is about 1375-1450 degrees Celsius.

With Daming's current smelting technology, it can barely do this!

It's just that due to the limited conditions, it can't be mass-produced!

But for Lu Ming, it doesn't matter!

After all, his current identity is just a small county order!

The boundaries of the jurisdiction are so big and lost!

There is also no need for mass production!

Say it again!

He didn't have that much steel in storage, enough to make a few cannons!

If it's an ordinary artillery, then naturally the more the better!

But this kind of artillery, which uses smokeless gunpowder to make shells, is not much more sophisticated!

In this era, the most widely used is the Hongyi cannon!

Later, after the Qing army entered the customs, it was changed to a red-coated cannon.

Who made them barbarians in the original account?

According to historical records.

The maximum firing range of the Hongyi cannon can reach about ten miles.

However, the actual effective range was only within three miles.

And the barrel of the gun is heavy, and it cannot be easily moved after being placed.

Therefore, it is generally used to defend the city.

And the Hongyi cannon played a huge role in the battle between the Ming and the Houjin!

Even Nurhachi, the leader of the Houjin, was wounded by the cannon and eventually fell ill and died.

After the capture of Shenyang by the Later Jin, the captured craftsmen were used to successfully imitate this heavy weapon.

Naming, God bless the general!

It can be said that the Hongyi cannon can be called the important weapon of the country in this era!

But while the Hongyi cannon is powerful, it also has a lot of shortcomings!

First of all!

The Hongyi cannon is a forged iron cannon and a copper-iron composite artillery.

The barrel is thin, and the length of the barrel does not quite match the caliber.

Although the copper barrel is not easy to blow up, it does not easily leave air holes when pouring.

However, the cost was too high, and the artillery was too cumbersome.

To know!

Although the Ming Dynasty used copper coins as currency, it was still a copper-deficient country!

Therefore, whether it is to save costs or reduce weight, it is still mainly cast iron!

Iron cast copper core!

But even so, the Hongyi cannon is about three meters long, and the weight is more than one meal!

It can be said that it is very bulky!

Secondly!

Although the Hongyi cannon is very powerful!

But the operation is cumbersome, and the rate of fire is slow!

Shoot once, and first reset the gun!

Then use a brush with a hook to clean up the debris inside the barrel.

A water-soaked brush is then inserted into the barrel to wash and extinguish any remaining sparks.

Then wrap the gun rod with a dry cloth and stick it into it to dry!

Finally, you can reload gunpowder and shells!

These actions must be strictly enforced, and they are very cumbersome!

And that's not even counting the process of trimming the gun position and re-aiming!

It can be fired once in about two minutes, even if it is fast!

Finally!

Because the Hongyi cannon is too bulky!

There is simply no suitable land artillery truck loading!

Resulting in extremely poor mobility!

In the field, it is impossible to quickly transfer positions!

Therefore, the Hongyi cannon is more used to defend or siege the city!

To sum up!

Lu Ming didn't plan to cast a heavy cannon similar to the Hongyi cannon!

Instead, he set his sights on a lighter, more portable hill cannon!

Stainless steel is far superior to copper and iron of the same era in terms of quality and density

Therefore, even if it is a rough mud film casting method, it is more delicate and practical than the Hongyi cannon!

This method casts out the artillery.

Although the caliber is slightly smaller than that of the Hongyi cannon.

But because of its material problems, not only does the effective range far exceed that of the Hongyi cannon, but the accuracy is incomparable!

And!

Because Lu Ming still has smokeless gunpowder in his hand!

Compared to black powder, the range, accuracy, and destructive power are several times stronger!

Finally!

Don't forget that Lu Ming still has natural rubber in his hand!

As long as you do it properly, you can make a simple tire!

And so it goes!

This kind of small mountain cannon can not only be used to siege and defend the city!

In the field, because of the presence of tires, mobility is also greatly enhanced!

That must be a cross-generational killer!

Nowadays!

Zhengning County already has a population of nearly 100,000.

It's just that most of these people are from farmers, and skilled jobs are very rare!

Although Lu Ming already has the idea, the materials are ready!

But there is no one to use!

The few blacksmiths who let them process composite armor and weapons are barely competent.

But it's a bit difficult for them to do the delicate work of casting artillery!

To solve this problem, Lu Ming can only find a way from somewhere else!

There are roughly two directions!

First, the border army!

At this time, the internal and external troubles of the Ming Dynasty were more serious.

There are Houjin and Mongolian iron cavalry outside, and peasant rebel armies everywhere inside!

In order to resist these, Da Ming arranged a large number of craftsmen to the border army!

Second, Xi'an City!

As an important town in the northwest, Xi'an is the base camp of the entire northwest!

Therefore, there are naturally all kinds of technical talents in Xi'an!

After thinking about it for a while, Lu Ming rejected the first idea!

Let's not mention that there is no way out on the side of the border army.

Even if there is, it's not enough for others!

It's impossible to give those craftsmen to yourself easily!

Then you can only start from Xi'an City!

Otherwise

Arrange for someone to go to Xi'an City to recruit some craftsmen to come over

It's a big deal, the treatment is better!

It's better than the embarrassing situation of having no available people right now!

After paying attention, Lu Ming no longer hesitated!

He didn't just want to recruit blacksmiths!

Carpenter or something, he wants them all!

After all, no matter how it develops in the future, it is inseparable from these craftsmen!

Just when Lu Ming began to plan for recruitment, he heard Liu Ru's delicate voice.

"My lord, Mr. Li Biao and Mr. Li Lian are back. "