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It didn't take long for Liu Chengzhi, the eunuch of the Soldier Bureau, to hurry in and salute with a happy face, so that Emperor Chongzhen could know that it must be a good thing without asking.

Sure enough, after the salute, I listened to Liu Chengzhi play: "Your Majesty, the performance of the artillery cast by the War Bureau has more than doubled!" ”

After the success of the previous iron mold casting cannon, it only increased the speed of the casting cannon, and there was no improvement in performance, the reason for this is that the iron mold casting cannon is mostly white-mouthed iron cannons.

This kind of artillery, if the firing speed is fast, the temperature is too fast, and it cannot be cooled down quickly, so every third cannon has to be cooled for a long time, and the service life is limited. On the actual battlefield, this defect is easily fatal.

But at this time, it was only used for the training of the artillery battalion of the new army, but it did not need to be so particular, and it was almost not used if it was used, so that the military battle bureau could be restored, and then the new artillery would be used. The cost is compared with the previous mud mold casting cannon, and this usage is also within the affordable range.

However, the artillery battalion of the new army must be put on the battlefield, which requires that the performance of the artillery must be improved. When Emperor Chongzhen inspected the War Bureau before, he asked them to improve the performance of their artillery.

Emperor Chongzhen didn't expect that in less than two months, the performance of the military battle bureau would be more than doubled, and he couldn't help but be very excited, and immediately ordered to set up the military battle bureau, and he wanted to go to see it on the spot.

Liu Chengzhi was naturally also happy, and made achievements, wishing that the emperor could go to the scene to take a look. After arriving at the War Bureau, he immediately led Emperor Chongzhen to the Cannon Hall.

Just like last time, there were many cannons in the courtyard of the cannon casting hall. Liu Chengzhi pointed to those cannons and introduced them to Emperor Chongzhen one by one.

There are both old and new artillery, and through comparison, Emperor Chongzhen has an intuitive impression. Then Liu Chengzhi can introduce ways to improve performance. In fact, it is nothing more than several aspects, one is the annealing treatment, which is the improvement of the quality of the artillery; The second is to improve the quality of molten iron to make it even better.

Emperor Chongzhen heard this, so he walked into the cannon hall to visit the scene, but found that there were many cannons inside, with various inclinations, and there were pools boiling water on the side, which made Emperor Chongzhen a little surprised, and couldn't help asking: "What is this for?" ”

"Under the guidance of His Majesty, the slaves and maids uphold the holy will, and let many craftsmen think more and do more experiments." Liu Chengzhi introduced with a hint of triumph, "The poor performance of the artillery is due to the fact that the cooling speed of the iron mold is too fast, and the cooling speed inside and outside is different. After the slave thought about it further, the biggest problem should be that the inside of the cannon chamber cooled too quickly, so she thought of a way to make the cooling rate in the cannon chamber a little slower. But I don't know how slow it should be, so I think of ways to try it one by one. ”

When Emperor Chongzhen heard this, he couldn't help but nodded, but he also knew that the reason for this was definitely not what Liu Chengzhi thought of himself. So, he stared at Liu Chengzhi and asked, "You came up with this yourself?" ”

As soon as he heard the emperor ask this, Liu Chengzhi didn't dare to talk nonsense, otherwise it would be the crime of bullying the king, and he immediately replied: "It is under the auspices of the slave and maid, and the efforts of the team are working together to get such a method!" ”

Emperor Chongzhen nodded and said, "Your leadership skills can't be run away." But you should also remember the method proposed by the craftsman and report it to me. In the future, it will be the same, whoever comes up with the idea, if it is feasible, you will let whoever is responsible, and in the end, if there is an achievement, he has merit, and you also have merit. Only in this way can we really mobilize their enthusiasm and let them come up with more ideas. Your leadership will be even greater, and I can rest assured that you will always be in charge of such an important military battle, understand? ”

Liu Chengzhi's brain faintly sweated when he said this, and he couldn't help but quickly nodded and replied: "Your Majesty Shengming, the slave understands!" ”

When the craftsmen not far away heard these conversations, they looked at each other one by one, and their faces were full of surprise.

In fact, not only at this time, but even in the future, in the future, no matter how advanced and developed civilization and science and technology are, as long as it is a human society, there will be such a situation, and the leader will occupy the credit of his subordinates.

How could Emperor Chongzhen not know this, he was in a good mood at this time, so he mentioned one or two points and warned Liu Chengzhi in advance, which can be regarded as having words first.

After he asked again, the craftsman Li Junfeng came over to see the driver, and he came up with this method. After Emperor Chongzhen listened to his explanation, he understood the principle he had in mind.

The general statement is: Li Junfeng believes that after the inner layer of the gun chamber is cooled and fixed, when the outer layer is gradually cooled, due to the relationship between thermal expansion and cold contraction, when the outer layer of the gun barrel is cooled, it will clamp the inner layer and produce an inward stress to the inside. Of course, there is a problem of cooling rate, and if it is to achieve the ideal state, the performance of the gun can be improved a lot.

And the method he came up with was based on this idea, which was to change the inner mold to a hollow, and then add hot water at various temperatures to make the inner wall of the gun chamber cool at a variety of different rates, so as to find the most appropriate cooling rate to make the performance of the gun achieve the best. At present, this idea has only just begun to be implemented, and no results have yet come out.

Emperor Chongzhen listened and nodded constantly, this theory is good when you hear it, and then it is used to guide practice, which should be a good experimental method. Thinking so, he immediately praised: "Yes, it's worth trying!" ”

He didn't know that Li Junfeng's method was very similar to a famous method on another plane, that is, in 1860, Major Thomas Rodman of the U.S. Army invented the hollow casting process, that is, casting the cannon around the core, and then cooling it with running water, which is a method to harden the inside of the gun chamber first, referred to as the Rodman casting method.

Of course, if this casting method is based on the clay mold casting method, it cannot be realized. It was only after the appearance of the iron mold cast cannon that such a natural development could occur.

Compared to Rodman in that plane, the military battle at this time can be described as wealthy, and the manpower and material resources are sufficient, and a variety of experiments can be carried out together. And relatively speaking, the wealth of experience accumulated by many craftsmen in casting cannons is not comparable to Rodman.

Emperor Chongzhen praised Li Junfeng again after hearing this, and asked other craftsmen to learn from him and think more. He has reason to believe that as long as the creative enthusiasm of the Ming craftsmen is stimulated, there will definitely be unexpected gains. Chinese, there have never been stupid people!

After returning from the inspection of the War Bureau, Emperor Chongzhen immediately issued an order to Cao Huachun, the general of the new army, to tell him the good news, and prepare to redress the artillery battalion of the new army and conduct a new round of training.

After finishing this, Emperor Chongzhen's eyes turned to the side of Naturalization City. For mobile phone users, please browse M. Reading for a better reading experience.