After sitting down in the restaurant, Chun Yuzhen poured a large sip of the liquor called "sweat and blood", and he didn't care if the liquor overflowed and spilled on his clothes, he stared at Zhao Xingde with red and swollen eyes and said: "Do you think I really lost all my family property by buying and selling coupons?" ”

"Why is that?" Zhao Xingde said lightly, filling the wine bowl in front of Chun Yuzhen. A person who seeks death must have a block in his chest, and when he finishes venting, he may not want to die. Li Ruoxue sat quietly beside him, and after she found that Chun Yuzhen had extremely strong self-esteem, she never looked at him with pity. "Soldiers can be killed but not humiliated", Li Ruoxue also felt that he should be persuaded that there were fewer and fewer real "scholars" in this world.

"Did you see the Ordnance Division's bounty list?" Chun Yuzhen said hoarsely.

"See." Zhao Xingde nodded, he guessed what was going on, and couldn't help but secretly sympathize with Chun Yuzhen in his heart.

"I found that using a method to cast a cannon can greatly reduce the weight of the cannon and improve the chances of successful casting." Chun Yuzhen said slowly, he took a sip of wine, and sighed, "But it can't be completely successful, the things that are cast are either cracked or hollow, and once the gunpowder is used violently, it will explode." All defective products. He took another sip of wine, which was the custom of the blacksmiths in front of the furnace, and some of the blacksmiths liked to take a sip on the sword they were forging and watch the blue flames rise. However, Chun Yuzhen despises this kind of boring behavior.

"And how are you going to forge a cannon?" Zhao Xingde asked slowly, he wanted Chun Yuzhen to talk as much as possible to spread the depression in his heart.

Chun Yuzhen was stunned, every blacksmith has his own secrets, especially the casting technique that is related to the golden reward, how could Zhao De ask so lightly in the restaurant. He was stunned for a long time, and then suddenly smiled again: "I really entered the magic barrier, this cannon has never been cast, my family property saved by four generations of my family has been lost, this killing cannon casting technique, I am still holding back what to do like a treasure." ”

He sighed, let go of his defense, and cherished this broom, but never succeeded in casting the cannon technique slowly: "The clay mold and wood mold are used for casting the cannon, and the mold is broken after the cannon is cast, so that the mold is redone every time, and the mold is slightly different each time, so that the copper cannon is different every time, and the quality is uneven." I thought that by switching to iron molds, I could cast more guns in one mold, and the size of the guns cast each time was the same, which was less likely to fail. At this point, he took a large sip of wine and choked on a cough, which he had been proud of at the idea.

Zhao Xingde was slightly taken aback, and the cannon casting technique that Chun Yuzhen said evoked some memories that he had sealed for a long time. If what is said is true, Chun Yuzhen can be regarded as creating a precedent for casting artillery.

After Chun Yuzhen poured the liquor, his eyes were also a little dazed, and he continued to mutter: "I tried casting a few copper cannons, and after failing, the cannons were smashed to shreds, I carefully examined the cracks and pores inside, and found that the reason why it was unsuccessful was because the copper water was poured into it, and the outer one condensed down first, fixing the outer circle of the artillery, and the inner one cooled down, desperately trying to collect it, and as a result, the cracks and gaps were pulled out." So I think that if you pour cold water into the mold of the casting cannon, let the inner wall of the copper cannon be cold first, and then the outer wall will be cold, so that the inside will be hard, and the outside will have to be squeezed inside," he raised his head and grinned at Zhao Xingde, "You don't know, when this molten iron and copper water is cold, it is not easy to squeeze and pull down, and sometimes it can make things better." ”

Zhao Xingde also fell into deep thought, his eyes wandered a little, and he slowly whispered: "I know." ”

Chun Yuzhen's eyes showed a trace of disbelief, and then turned gloomy, bowed his head and said: "At that time, I had already failed to cast several cannons, and the ancestral blacksmith shop was already unable to make ends meet. ”

"Did you really try casting?" A trace of excitement flashed in Zhao Xingde's eyes, Chun Yuzhen's secret evoked memories that he thought he would never touch again, this seemingly ordinary person in front of him was actually a real genius, he let an extremely advanced casting technique come to the world more than 800 years in advance, and he himself was so depressed that he wanted to commit suicide because of this suave talent.

"Tried." Chun Yuzhen sighed and said, full of sorrow: "It's still all failed, after today, my ancestral blacksmith shop will also be given to others, tomorrow I have no shame to see my ancestors in the ground, or today." ”

"Won't it?" Zhao Xingde didn't seem to hear Chun Yuzhen's words that he was going to commit suicide, frowned and thought, and muttered in his mouth, "You use copper water, which is better than the castability of pig iron water, is there a problem with the formula of copper water?" He put his right hand on the table, one finger subconsciously drew on the table, and his left hand also subconsciously took it up, as if he was pressing something.

Although Chun Yuzhen wanted to commit suicide, he did not allow others to slander his skills at will, and said with a red neck: "There will be no problem with copper water, my father came out of the Ordnance Department, although he can't say that all the skills are through, but what he is in charge of is the section of copper water ingredients." "For the sake of secrecy, the Ordnance Division does not allow a single craftsman to be in charge of the entire casting process. Chun Yu was slightly regretful in his heart, it was precisely because he did not understand the other cannon casting processes of the Ordnance Department that he simply found another way and took the lead in using two methods: iron mold casting and central water injection condensation.

"If there is no problem with the copper water formulation, then the problem may be the cooling temperature." Zhao Xingde paused for a moment, and then said, "In other words, there is a problem with the combination of temperature and formula." He still didn't think it was clear enough and continued, "I mean, the control of the cooling temperature of the inner and outer walls of the casting mold is not accurate enough. As he spoke, he stretched out his hand and dipped a drop of wine, his wrist condensed, his elbow pulled slightly, and a straight horizontal line was drawn, and then he sketched up and down a few strokes on the wine, and drew the mold, the cannon body, and the water-filling device described by Chun Yuzhen according to his conjecture.

Chun Yuzhen's eyes widened, one of Zhao Xingde's movements was so skillful that he was surprised, and the other was that he only depicted a rough idea, but Zhao Xingde dissected the structure on the spot, which was similar to what he actually made, and even the structure was more concise and bright. Li Ruoxue also looked at Zhao Xingde in surprise, she never knew that Yuan Zhi was actually good at painting, but it was a style of creating French-like rules and ink.

"The original copper water material formula of the Ordnance Division must be cooled with wooden molds and mud molds, and the formula with the highest probability of successful casting. If you don't use cold water and iron molds to cool down, you may be able to cast successfully. Zhao Xingde suddenly remembered something, paused, and said in a deep voice.

When Chun Yuzhen heard this, he was stunned for a moment, as if his mind was taken away, and after a long time, he slapped the wine case and sighed: "Why didn't I think of this." He was silent for a long time, only feeling that what he had done with all his wealth was just a joke. He stared, but the expression on his face was a little gloomy, "But if you use clay molds and wooden molds to cast, it is impossible to defeat the Ordnance Division." After a pause, he respectfully bowed his hand to Zhao Xingde and said: "Mr. turned out to be a master, although he was bankrupt, he also got a lesson, and he was grateful." With that, he got up and left. Although he has no family property, he still has a craft, and it is not a problem to find a blacksmith shop to be a craftsman and support his family. Thinking of this, Chun Yuzhen secretly scolded himself for being confused for a while, and was even more grateful to Zhao Xingde for saving his life.

"Mr. Chun Yu is slow," Zhao Xingde said slowly, "There is one more thing to ask for in the future." ”

Chun Yuzhen got his guidance just now, so he naturally couldn't push it back at this time, sat down, and arched his hand: "Sir, please speak, I know everything below." At this time, even if Zhao Xingde asked him about the ancestral know-how, he would not hide it.

Zhao Xingde thought for a moment, pressed his hands on the table, leaned forward, approached Chun Yuzhen, and said in a low voice: "Casting artillery is a major military matter, isn't Mr. Chun Yu afraid that the puppet is not guilty and guilty?" ”