He felt that the cost of the lost wax method was too high, and Song Yingxing did not think it was a good thing to use it to cast steam engines.
“Don’t worry about the cost!”
Zhu Cixiang smiled slightly, looked at Song Yingxing in front of him and said.
"As long as we can build the first steam engine of this type, it is a success for us!"
"Yes! Your Highness!"
Song Yingxing nodded.
At this time, Zhu Cixiang pondered for a moment, looked at Song Yingxing in front of him and said.
"However, my dears, before I study this steam engine, I need you to get something done."
"Your Highness, please tell me!"
Song Yingxing and Wang Zheng quickly asked Zhu Cihong in front of Mian.
"As for the problem of guns, it is too difficult to cast gun barrels now. The failure rate of making gun barrels using the clay mold method is too high, the yield rate is too low, and the speed is too slow.
As for the lost wax method of casting gun barrels, the yield rate can indeed be guaranteed, but the problem is that the cost is high and the efficiency is still slow.
So, I was thinking about whether we could make an iron mold that could be poured repeatedly. In this case, our yield rate could be improved and the speed would be much faster!"
Zhu Cixiang didn't know the specific technical details of the iron mold manufacturing method, so he could only tell Song Yingxing and Wang Zheng this way. Presumably these two big guys in the technical field would have better ideas than him.
After hearing Zhu Cixiang's words, Song Yingxing and Wang Zheng in front of them were slightly stunned.
Song Yingxing looked at Zhu Cixiang in front of him and said: "Iron mold casting actually has a deep history in China. In the late Spring and Autumn Period, there are already records of using iron molds to cast agricultural tools."
Hearing Song Yingxing's words, Zhu Cixiang was slightly stunned.
He really doesn't know this. After all, he is not a god, and there are still many things he doesn't know.
At this time, Song Yingxing continued to say to Zhu Cixiang in front of him: "The hardware of the iron mold technology itself is not difficult. It can be made of cast iron or cast steel. It is nothing more than a carrying container. In addition to fixing the gun mold, it also dissipates heat. The effect is relatively good. The advantage of the iron mold is that it is easy to integrate, unlike clay mold casting, which has to wait for time to dry in the shade, and the yield rate is indeed higher."
However, the iron mold also has shortcomings. From the perspective of metal casting and metallography, the heat dissipation of the iron mold is too fast, which will cause the liquid pig iron to have a large degree of supercooling when cooling, and the carburization in the molten iron will not have enough time to precipitate graphite. has solidified, so the cementite in iron mainly exists in the form of iron carbide, that is, white iron.
The advantage of the iron mold is that it speeds up the production rate, but because the cooling rate is too fast, although it is relatively smooth, almost all the gun barrels are made of white iron, which causes the brittleness to increase and the performance of the artillery to decrease. In order to increase the tensile strength, only Use quantity to stack quality, which is solved by increasing wall thickness."
What the fuck???
Hearing Song Yingxing's words, Zhu Cixiang was immediately confused.
Is this a technical guru??
Unexpectedly, he proposed an iron mold casting method, and Song Yingxing in front of him had already explained all the advantages and disadvantages of this technology.
sharp!
Wang Zheng on the side also nodded with a smile on his face.
At this time, Zhu Cixi hesitated for a moment, looked at Song Yingxing in front of him and asked: "Then this technology... is it good? Do you know how to do it?"
"Actually, the technology itself is not difficult. There has always been experience in iron mold casting, but few people would think of using it to cast cannons."
Song Yingxing smiled bitterly and said to Zhu Cixiang in front of him.
"Because this defect is very obvious, white iron will be formed if it is cooled too quickly. White iron is very brittle, and the barrel is easily broken and unstable!"
“Then is there any way to solve this problem??”
At this time, Zhu Cixiang curiously asked Song Yingxing in front of him.
"Is it possible to cool down the gun barrel quickly and make it less likely to turn into white iron??"
Song Yingxing pondered for a moment, looked at Zhu Cixiang in front of him and said, "Then let me study it!"
"good!"
Hearing Song Yingxing's words, Zhu Cixiang showed a smile on his face.
As long as this technical master is willing to take on this work, then he will be half successful!
"Then I look forward to good news from Mr. Song!"
"kindness!"
Song Yingxing nodded, and Zhu Cixiang pondered for a moment.
"Then there's the issue of guns."
After Zhu Cihong paused, he looked at Song Yingxing in front of him and asked slightly curiously: "I'm sorry, I didn't mean to disturb the two gentlemen's development of the steam engine, but at present, we are still not very safe, and the intruders are still eyeing us.
The Manchu Qing Dynasty is very likely to enter the border and plunder at any time, so..."
"Your Highness, please don't say that!"
At this time, Song Yingxing quickly said to Zhu Cixiang in front of him.
"These are what we should do in the first place. The development of guns and artillery is obviously more important. It is related to the future. We should do our best!"
Song Yingxing said to Zhu Cixiang in front of him with a serious face.
"I'll do my best!"
Wang Zheng on the side also spoke to Zhu Cihong in front of him with a serious face.
"Then I'll leave it to you two gentlemen!"
Zhu Cixiang bowed deeply to the two people in front of him.
Song Yingxing and Wang Zheng quickly returned the salute to Zhu Cihong.
After finishing speaking, Zhu Cixi left the yard.
When leaving the courtyard, Zhu Cixiang still felt a little emotional in his heart. No matter what, you must respect professionalism!
Song Yingxing's words really made Zhu Cixiang extremely emotional. It made him see how powerful the engineering experts of later generations were.
Zhu Cixi vaguely remembered that this iron-cast cannon should have only appeared in the late Qing Dynasty, and it was blown by many people at that time.
But unexpectedly, Song Yingxing only listened to himself talk about this technology, and he could quickly tell himself the advantages and disadvantages of this technology.
He is indeed the man who wrote "Tiangong Kaiwu"!
ox!
Zhu Cixiang left the courtyard with emotion in his heart and inspected the city defense again.
Then he returned to his mansion.
On the other side, news about the negotiations between His Royal Highness the Crown Prince and the intruders also spread to the Jiangnan area.
"Absurd! Ridiculous! Really absurd!!!"
Qian Yiqian said something exciting, and even coughed a few times, but his face was very excited, and there was a trace of anger in his eyes.
"The prince actually negotiated with a traitor who had already occupied the capital! And this traitor had dug up the ancestral graves of Fengyang Mansion before! He was able to put aside the dispute and negotiate! This is simply the most ridiculous thing in the world!"